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Progress in the design and performance evaluation of catalysts for low-temperature direct ammonia fuel cells

Green Chemical engineering 2025年第1期6卷 54-67页

作者： Zhongbin Gong Hao Wang Chenhao Li Qinqin Sang Ying Xie Xiaosa Zhang Yanrong Liu College of Science Shenyang University of Chemical TechnologyShenyang110142China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Mesoscience and EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China Longzihu New Energy Laboratory Zhengzhou Institute of Emerging Industrial TechnologyHenan UniversityZhengzhou450000China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Ammonia,a hydrogen-rich and carbon-free energy carrier,possesses advantages such as high energy density and convenient liquefaction storage and serves as an optimal medium for hydrogen ***-temperature direct ammonia fuel cells(DAFCs)represent a highly promising pathway for the efficient utilization of ammonia ***,the sluggish kinetics of the low-temperature ammonia oxidation reaction(AOR),requires high loading of platinum-group metals(PGMs)catalysts,and their poisoning significantly hampers the performance of DAFCs,thereby limiting their large-scale commercial ***,it is crucial to design efficient,cost-effective,and stable *** this work,a detailed review of recent research efforts aimed at elucidating the mechanism underlying the AOR is *** on this knowledge base,progress in the design and synthesis of both PGM and PGM-free catalysts for the AOR is discussed,as well as membrane electrode assembly(MEA)preparation processes for ***,the results of the performance evaluation of AOR catalysts in single-cell tests are ***,based on our findings from this research area thus far,potential design strategies for AOR catalysts that can promote the rapid development of low temperatures DAFCs are proposed.

关键词： Low-temperature direct ammonia fuel cells Anti-poisoning ammonia oxidation catalysts Membrane electrode assembly Single-cell evaluation

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The simultaneous removal of methylene blue (MB) and Ca2+ by recyclable adsorbents based the scales derived from coal gasification system

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Environmental science and Pollution Research 2024年第22期31卷 32519-32537页

作者： An, Bai-Hong Xu, Da-Mao Wang, Run-Ting Wen, Ye-Xuan Geng, Rui Wu, Jia-Yun Tang, Xian-Chun Chen, Hong-Bin State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China National Engineering Research Center for Urban Pollution Control Tongji University Shanghai200092 China Department of Materials Science Fudan University Shanghai200433 China Sinopec Ningbo Engineering Co. LTD Ningbo315103 China

The transformation of solid wastes from industrial production into effective adsorbents could significantly contribute to wastewater treatment. In this study, after acidizing and burning soft scale (SS) from coal gasification system, two magnetic adsorbents (mag-ASS and mag-BASS) were prepared via the combination of magnetite with ultrasonic, respectively. The treatment effects of mag-ASS and mag-BASS were then investigated for simulated wastewater containing macromolecular organic matter [i.e., methylene blue (MB)] and Ca2+. The results indicated that the pseudo second order kinetic, Elovich, Freundlich, Langmuir and Temkin model could well describe the adsorption behavior of MB and Ca2+ onto mag-ASS and mag-BASS. The maximum adsorption capacities of mag-ASS for MB and mag-BASS for Ca2+ were 600.53 mg/g and 102.54 mg/g, respectively. Surprisingly, the adsorption abilities of mag-ASS for MB and mag-BASS for Ca2+ show significantly higher than the others. The adsorption mechanisms of MB mainly included electrostatic interaction, π-π conjugate interaction and cation exchange, while those of Ca2+ were mainly electrostatic interaction and cation exchange. The diffusion of MB and Ca2+ onto the magnetic adsorbents might be controlled by the combined effects of intraparticle and liquid film diffusion. There was no significant reduction in adsorption capacity after 8 cycles of adsorption and desorption, indicating that SS-based magnetic adsorbents had good recyclability and stability. Moreover, the removal efficiency of mag-BASS for total hardness and total organic carbon in real coal gasification gray water (CGGW) was 82.60 and 64.10%, respectively. The treatment of CGGW and the resource of wastes would significantly promote the reasonable disposal of coal gasification scales. Graphical abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Metal ions

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A Study on Task Offloading Based on Multi-Agent Advantage Actor Critic Algorithms in IIoT 5

A Study on Task Offloading Based on Multi-Agent Advantage Ac...

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5th International Conference on Computers and Artificial Intelligence technology, CAIT 2024

作者： Xu, Yanchao Lv, Zheng Zhao, Jun Dalian University of Technology Key Laboratory of Intelligent Control and Optimization for Industrial Equipment Ministry of Education School of Control Science and Engineering Dalian China

ISBN: (纸本)9798331530891

With the rapid development of Industry 4.0, resource-constrained industrial devices are often unable to meet different demands of compute-intensive and latency-sensitive tasks in modern factories. To cope with this challenge, offloading tasks from industrial devices to edge servers or a cloud computing center to obtain lower delay is a good solution. Most of the traditional task offloading approaches rely on centralized decision-making systems, which may not be able to efficiently cope with device heterogeneity and the specific needs of different tasks in industrial environments. To address this problem, this study proposes a more comprehensive edge computing network model for industrial Internet of Things (IIoT). By integrating an action masking technique, we establish a Markov decision model with a constrained action space. Additionally, we propose a task offloading framework based on the Multi-Agent Advantage Actor Critic (MAA2C) algorithm, adopting the Centralized Training Decentralized Execution (CTDE) architecture, aiming to achieve task offloading decision-making in modern factories and reduce the overall system delay. Validated through numerical simulation experiments, our proposed framework not only performs well in reducing system delay but also shows good adaptability in different industrial environments. © 2024 IEEE.

关键词： Action Masking Edge Computing industrial Internet of Things Multi-agent Advantage Actor Critic Task Offloading

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Joint Self-Paced Learning and Concept Factorization for Multi-view Clustering

Joint Self-Paced Learning and Concept Factorization for Mult...

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第43届中国控制会议

作者： Xuemin Hu Dan Xiong Li Chai School of Information Science and Engineering Wuhan University of Science and Technology State Key Laboratory of Industrial Control Technology College of Control Science and EngineeringZhejiang University

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

Concept factorization-based multi-view clustering methods have received much attention and achieved promising ***,they are limited by uncertain noise in the *** improve the robustness of concept factorization-based multi-view clustering methods,a self-paced learning strategy that considers the potential relationship between the distribution of samples and the training order of samples is *** this paper,we propose a joint self-paced learning and concept factorization(SPLCF) method for multi-view *** is,during the training process,self-paced learning can identify the noise data and adaptively assign different weights to different sample *** addition,to preserve the local manifold structure,the graph regularization term is used to effectively constrain the structural features on the data manifold.l2,12-norm is applied to the association matrix,which aims to retain discriminative features and further alleviate the effect of noise in the ***,an iterative algorithm is presented to solve the optimization *** numerical experiments on four benchmark datasets have demonstrated that the proposed algorithm outperforms other state-of-the-art algorithms.

关键词： Self-paced learning Concept factorization Sparsity constraint Multi-view clustering

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Reaction mechanism of antioxidant inhibition of hydroxyl radical in coal oxidation

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Environmental science and Pollution Research 2024年第30期31卷 43351-43368页

作者： Shu, Pan Zhang, Yanni Deng, Jun Zhai, Fangyan Duan, Zhengxiao College Of New Energy Longdong University Qingyang745000 China College of Safety Science and Engineering Xi’an University of Science and Technology Xi’an710054 China Shaanxi Key Laboratory of Prevention and Control of Coal Fire Xi’an University of Science and Technology Shaanxi Xi’an710054 China Key Laboratory of Coal Resources Exploration and Comprehensive Utilization Ministry of Land and Resources Xi’an China

To solve the problem of unclear targeted inhibition of key free radicals by antioxidants, this paper took the hydroxyl radical with the highest oxidation activity of coal as the inhibition target and selected five antioxidants such as ethylene diamine tetraacetic acid, tea polyphenol, citric acid, vitamin C, and proanthocyanidins. Based on the theory of quantum chemistry, the characteristics and oxidation pathway of antioxidants inhibiting coal oxidation of hydroxyl radical were analyzed. Analyze the influence characteristics of antioxidants on the evolution of free radicals in coal through an electron paramagnetic resonance experiment (ESR). The results showed that the electron density of antioxidants was mainly distributed in the functional groups of carboxyl and hydroxyl, which played a key inhibitory role, and the vicinity of carboxyl and hydroxyl and other functional groups was positive potential, which was the active site of inhibiting hydroxyl radical. The order of inhibitory capacity of the five antioxidants was determined as GTP > PC > EDTA > CA > VC. It is concluded that the energy barrier of hydroxyl radical inhibition by citric acid is much lower than that of EDTA. For the hydrogen extraction reaction, VC inhibited the hydroxyl radical pathway with a higher energy barrier than the other three antioxidants. The mechanism of five antioxidants inhibiting •OH reaction was comprehensively analyzed. It was found that tea polyphenols have more active sites that can react with •OH to quench it, so the inhibition of tea polyphenols should be the most significant. When antioxidants inhibit coal spontaneous combustion, the type, complexity, concentration, and linewidth of free radicals in coal molecules are lower than those in raw coal, with GTP antioxidants having the best inhibitory effect. The research results have important theoretical and practical significance for revealing the mechanism of coal spontaneous combustion inhibition and developing directional coa

关键词： Antioxidants

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Confinement properties of circular concrete columns wrapped with prefabricated textile-reinforced fine concrete shells

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Frontiers of Structural and Civil engineering 2023年第10期17卷 1554-1570页

作者： Qin ZHANG Qiao-Chu YANG Xiang-Lin GU Yong JIANG Hai-Yang ZHU College of Civil and Transportation Engineering Hohai UniversityNanjing 210024China Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji UniversityShanghai 200092China School of Civil Engineering Suzhou University of Science and TechnologySuzhou 215009China

This paper proposes an innovative column composed of a core column(including both reinforced concrete(RC)and plain concrete(PC)columns)and a prefabricated textile-reinforced fine concrete(TRC)*** study the confinement properties of TRC shells on this novel type of concrete column,20 circular specimens,including 12 PC columns and 8 RC columns,were prepared for axial compressive *** key parameters,including the column size,reinforcing ratio of the carbon textile,concrete strength,and stirrup spacing,were *** results indicated that the compressive properties of the columns were improved by increasing the reinforcing ratio of the textile *** the case of TRC-confined PC columns,the maximum improvement in the peak load was 56.3%,and for TRC-confined RC columns,the maximum improvement was 60.2%.Based on the test results,an analytical model that can be used to calculate the stress–strain curves of prefabricated TRC shell-confined concrete columns has been *** calculated curves predicted by the proposed model agreed well with the test results.

关键词： textile-reinforced fine concrete prefabricated shell confined concrete column confinement properties stress–strain relationship

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Stabilized Hf-doped Ti/Sb-SnO2 electrode for efficient degradation of tetracycline

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Environmental science and Pollution Research 2024年第35期31卷 47960-47973页

作者： Li, Danni Guo, Xin Shao, Xiang Zhou, Anhui Zhu, Lin Zhang, Yuting Li, Binbin Du, Yan Cao, Limei Yang, Ji State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control On Chemical Processes School of Resources and Environmental Engineering East China University of Science and Technology 130 Meilong Road Shanghai200237 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

The electrochemical advanced oxidation process (EAOP) has shown significant promise in the field of refractory organic wastewater treatment due to its high efficiency and environmentally friendly nature. In this study, Ti/Sb-SnO2 electrodes with varying proportions of Hf were prepared using the sol–gel method. The addition of Hf transformed the original collapsing and broken surface into a flat and regular surface. The results demonstrated that Ti/Sb-SnO2-Hf electrode doped with 6% Hf exhibited a higher oxygen evolution potential (OEP) and excellent stability. The OEP increased from 2.315 V without Hf-doping to 2.482 V, and the corresponding actual life was 321.05% higher than that without Hf. The current density (5–40 mA·cm−2), electrolyte concentration (0.02–0.2 mol·L−1), pH (3–11), and initial pollutant concentration (5–80 mg·L−1) were evaluated to confirm the tetracycline (TC) degradation characterization of Ti/Sb-SnO2-6%Hf electrodes. It was concluded that under the optimal degradation conditions, the removal rate of TC could reach 99.66% within 2 h. The degradation of TC follows first-order reaction kinetics. The oxidative degradation of TC was achieved through indirect oxidation, with ·OH playing a dominant role. TC’s electrochemical oxidation degradation pathway has been proposed: Based on LC–MS results, three main pathways are speculated. During the electrocatalytic oxidation process, decarboxylation, deamidation, and ring-opening reactions occur under ·OH attack, producing intermediate compounds with m/z values of 427, 433, 350, 246, 461, 424, 330, 352, 309, 263, and 233. These intermediates are further oxidized to intermediate compounds with an m/z value of 218. This work introduces a new efficient anode electrochemical catalyst for the degradation of TC, providing a strategy for industrial applications. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Electrolytes

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Efficient reduction and adsorption of Cr(Ⅵ)using FeCl_(3)-modified biochar:Synergistic roles of persistent free radicals and Fe(Ⅱ)

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Journal of Environmental sciences 2024年第3期137卷 626-638页

作者： Shujie Hu Chengshuai Liu Hongling Bu Manjia Chen Ying-heng Fei National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and ManagementInstitute of Eco-environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of ScienceGuiyang 550081China School of Environment Science and Engineering Guangzhou UniversityGuangzhou 510006China College of Resources and Environment Chongqing SchoolUniversity of Chinese Academy of SciencesChongqing 400714China School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China

Transition metal iron and persistent free radicals(PFRs)both affect the redox properties of biochar,but the electron transfer relationship between them and the coupling reduction mechanism of Cr(Ⅵ)requires further *** untangle the interplay between iron and PFRs in biochar and the infuences on redox properties,FeCl_(3)-modified rice husk biochar(FBCs)was prepared and its reduction mechanism for Cr(Ⅵ)without light was *** FBCs had higher surface positive charges,oxygen-containing functional groups,and PFRs compared with pristine rice husk biochar(BC).Phenoxyl PFRs with high electrondonating capability formed in *** pronounced electron paramagnetic resonance signals showed that the PFRs preferred to form at lower Fe(Ⅲ)*** a high concentration of Fe(Ⅲ)would be reduced to Fe(Ⅱ)and consumed the formed *** kinetics and X-ray photoelectron spectroscopy analysis indicated that the FBCs effectively enhanced the Cr(Ⅵ)removal efficiency by 1.54-8.20 fold and the Cr(Ⅵ)reduction efficiency by 1.88-9.29 fold compared to those of *** quenching and competitive reductant addition experiments revealed that the higher Cr(Ⅵ)reduction performance of FBCs was mainly attributed to the formed PFRs,which could contribute to~74.0%of Cr(Ⅵ)reduction by direct or indirect electron *** PFRs on FBCs surfaces could promote the Fe(Ⅲ)/Fe(Ⅱ)cycle through single electron transfer and synergistically accelerate~52.3%of Cr(Ⅵ)*** study provides an improved understanding of the reduction mechanism of iron-modified biochar PFRs on Cr(Ⅵ)in environments.

关键词： Biochar Iron-modification Cr(Ⅵ) Electron transfer Reduction mechanism

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Review of advanced oxidation processes for treating hospital sewage to achieve decontamination and disinfection

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Chinese Chemical Letters 2024年第1期35卷 140-152页

作者： Si-Ying Yu Zhi-Hui Xie Xiaoyu Wu Yun-Zhe Zheng Yang Shi Zhao-Kun Xiong Peng Zhou Yang Liu Chuan-Shu He Zhi-Cheng Pan Kai-Jun Wang Bo Lai State Key Laboratory of Hydraulics and Mountain River Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Sino-German Centre for Water and Health Research Sichuan UniversityChengdu 610065China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Water Safety and Water Pollution Control Engineering Technology Research Center in Sichuan Province Haitian Water GroupChengdu 610041China

Hospital sewage contains various harmful pharmaceutical contaminants(e.g.,antibiotics,anti-inflammatory agents,and painkillers)and pathogens(e.g.,bacteria,viruses,and parasites),whose direct discharge into the environment will induce diseases and pose a powerful threat to human health and safety,and environmental *** recent years,advanced oxidation processes(AOPs),particularly photocatalysis,electrocatalysis,and ozone catalysis have been developed as widespread and effective techniques for hospital sewage ***,there is a lack of systematic comparison and review of the prior studies on hospital sewage treatment using AOPs *** review elaborates on the mechanisms,removal efficiencies,and advantages/disadvantages of these AOPs systems for hospital wastewater decontamination and ***,some novel and potential technologies such as photo-electrocatalysis,electro-peroxone,Fenton/Fenton-like,and piezoelectric catalysis are also included and ***,we further summarize and compare the capacity of these AOPs to treat the actual hospital wastewater under the impact of the water matrix and pH,and estimate the economic cost of these technologies for practical ***,the future development directions of AOPs for hospital wastewater decontamination and disinfection have been ***,this study provides a comparison and overview of these AOP systems in an attempt to raise extensive concerns about hospital wastewater decontamination and disinfection technologies and guide researchers to discover the future directions of technologies optimization,which would be a crucial step forward in the field of hospital sewage treatment.

关键词： Hospital sewage treatment Advanced oxidation processes Pharmaceutical contaminants Disinfection Decontamination

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Tailor-made overstable 3D carbon superstructures towards efficient zinc-ion storage

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Chinese Chemical Letters 2025年第4期36卷 409-415页

作者： Chengmin Hu Pingxuan Liu Ziyang Song Yaokang Lv Hui Duan Li Xie Ling Miao Mingxian Liu Lihua Gan Shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji UniversityShanghai 200092China College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China Key Laboratory of Yangtze River Water Environment Ministry of Education College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Designing carbon materials with ideal stable hierarchical porous structures and fiexible functional properties for efficient and sustainable Zn2+ion storage still faces great challenges. Herein, the threedimensional carbon superstructures with spherical nanofiower-like structures were tailor-made by the self-assembly strategy. Specifically, organic polymer units(i.e., organic motifs) were formed by tetrachloro-p-benzoquinone(TBQ) and 2,6-diamino anthraquinone(DAQ) via a noble-metal-free catalyzed coupling reaction. Subsequently, the organic motifs assemble into spherical nanofiower-like superstructures induced by intermolecular hydrogen bonding and aromatic π-π stacking interactions. Welldesigned carbon superstructures can provide a stable backbone that effectively blocks structural stacking and collapse. Meanwhile, the hierarchical porous structures in 3D carbon superstructures provide continuous charge transport pathways to greatly shorten the ion diffusion distance, and as a result, the carbon superstructures-based zinc-ion hybrid capacitors(ZIHCs) provide a capacity of 245 m Ah/g at 0.5 A/g, a high energy density of 152 Wh/kg and an ultra-long life of 300,000 cycles at 20 A/g. The excellent electrochemical performance is also attributed to the corresponding charge storage mechanism, i.e., the alternate binding of Zn^(2+)/CF_(3)SO_(3)^(-) ions. Besides, the high-level N/O motifs improve the surface properties of the carbon superstructures and reduce the ion migration barriers for more efficient charge storage. This paper provides insights into the design of advanced carbon-based cathodes and presents a fundamental understanding of their charge storage mechanisms.

关键词： Tailor-made Overstable Carbon superstructures High serformance Zinc-ion storage

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