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Platinum clusters stabilized by zincosilicate zeolite for efficient propane dehydrogenation

Chinese Journal of Catalysis 2025年第4期71卷 208-219页

作者： Hao Liu Ying Zhang Liyang Liu Tianxiang Chen Xingcong Zhang Peng Hu Chao Xiong Jie Zhou Hao Zhang Lihui Dong Tsz Woon Benedict Lo Bing Nan Xiaohui He Hongbing Ji Key Laboratory of Bioinorganicand Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research InstituteSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou 510275GuangdongChina Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004GuangxiChina Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteShanghai 200120China State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHunghomHong KongChina State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014ZhejiangChina Guangdong Technology Research Center for Synthesis and Separation of Thermosensitive Chemicals Guangzhou 510006GuangdongChina

Dispersing metals from nanoparticles to clusters is often achieved using ligand protection methods,which exhibit unique properties such as suppressing structure-sensitive side ***,this method is limited by the use of different metal precursor salts corresponding to different *** alternative approach,the ion exchange(IE)method,can overcome this limitation to some ***,there is still an urgent need to address the stabilization of metals(especially precious metals)by using IE ***,we reported a Pt cluster catalyst prepared mainly by anchoring Pt atoms via O located near the framework Zn in zincosilicate zeolites and riveted by zeolite surface rings after reduction(reduced Pt/Zn-3-IE).The catalyst can achieve an initial propane conversion of 26%in a pure propane atmosphere at 550℃and shows little deactivation even after 7.5 d of ***,the alteration of catalyst by the introduction of framework Zn was also highlighted and interpreted.

关键词： Zincosilicate zeolite Acid-site identification Rivet effect Pt clusters Propane dehydrogenation

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Formation of Robust Cei Film on High Voltage Lini0.6co0.2mn0.2o2 Cathode Enabled by Functional [Pivm][Tfsa] Ionic Liquid Additive

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SSRN 2022年

作者： Cai, Yingjun Xu, Tinghua Meng, Xianglei von Solms, Nicolas Zhang, Haitao Thomsen, Kaj Department of Chemical and Biochemical Engineering Technical University of Denmark Søltofts Plads Kgs. Lyngby 2800 Denmark Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

The ionic liquid 1-(3-amino-3-oxopropyl)-3-vinylimidazolium bis(trifluoromethylsulfonyl)amide ([PIVM][TFSA]) was synthesized and applied in the electrolyte of Li/LiNi 0.6 Co 0.2 Mn 0.2 O 2 lithium ion batteries. The thermostability of this pure ionic liquid was investigated to provide a wide liquid range from -50 °C to 200 °C. The physicochemical properties of binary mixtures of this ionic liquid with DMC and EMC were measured at different temperatures and with different ionic liquid mole fractions. [PIVM][TFSA] widens the electrochemical window of the electrolyte. The ionic liquid inhibits the increasing of water and HF content in the electrolyte. A comparison of charge and discharge performances in different electrolytes with various content of ionic liquid is reported. The electrolyte with the concentration of 1.0 wt % [PIVM][TFSA] has the best electrochemical properties. It enhances the initial capacity, the capacity retention and the high current rate performance of the cells. The surface film on the electrodes was confirmed by SEM and XPS that the ionic liquid [PIVM][TFSA] participated in membrane formation and played an active role. © 2022, The Authors. All rights reserved.

关键词： Electrolytes

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Gram-scale synthesis of unsupported Pt-rare earth nanosponge for enhanced stability in proton exchange membrane fuel cells

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Chemical engineering Journal 2025年 515卷

作者： Li, Chenhao Wang, Hao Qian, Fangren Li, Yawei Sang, Qinqin Chen, Qingjun Liao, Jialiang Zhu, Yihan Liu, Yanrong Zhang, Suojiang School of Rare Earths University of Science and Technology of China Hefei230026 China Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341119 China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Mesoscience and Engineering Beijing Key Laboratory of Solid State Battery and Energy Storage Process Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Longzihu New Energy Laboratory School of Energy Science and Technology Henan University Zhengzhou450000 China School of Chemistry and Chemical Engineering Shanxi University Taiyuan030006 China Center for Electron Microscopy Institute for Frontier and Interdisciplinary Sciences State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering Zhejiang University of Technology PR Hangzhou310014 China

Durability is crucial for proton exchange membrane fuel cells (PEMFCs), but the current preferred catalyst, Pt/C, suffers from carbon corrosion and Pt detachment during cycling. In this work, we facilely synthesized carbon-free, unsupported PtLa catalysts on a gram-scale via arc melting coupled with a suction casting process, followed by a dealloying treatment. The resulting PtLa catalysts possess a nanosponge morphology, facilitating mass transport paths for the oxygen reduction reaction. In a PEM single cell, the nanosponge structure demonstrates high utilization of ionomers and proton conductivity with a minimal ionomer loading, and exhibits enhanced activity in the rated voltage region. A mass activity of 0.50 A mgPt-1 is achieved for the nanosponge PtLa-3 (NSPL-3), which is 2.9-fold greater than that of Pt/C (0.17 A mgPt-1), with 94.8% voltage retention and only 22.0% MA loss after 20,000 cyclic durability tests. The high activity retention of NSPL-3 is attributed to the high retention of its nanosponge-like structure, which maintains excellent connectivity between the active sites and leaves sufficient channels for mass transport. This approach holds the potential to propel fuel cell technology forward by providing a cost-effective and robust catalyst alternative. © 2025

关键词： Electrolytic reduction

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Bi2o3 Microspheres Combined Electron-Deficient B-Reduced Graphene Oxide as Functional Electrocatalyst for Effective Synthesis Urea from N2 and Co2

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SSRN 2024年

作者： Xing, Pingxing Wei, Shenqi Chen, Xinyi Luo, Hualan Dai, Liyi Wang, Yuanyuan State Key Laboratory of Petroleum Molecular & Process Engineering East China Normal University No. 500 Dongchuan Road Shanghai200241 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai200062 China

Electrochemical synthesis urea, which couples N2 and CO2, is seen as a potential promising and sustainable alternative to traditional harsh industrial process. However, the significance of the rational design electrocatalyst has been enthused due to the hard activation of N≡N, the prevalence of sub-reactions, and the low current density. Herein, an electrocatalyst, Bi2 O3/B-reduced graphene oxide (RGO) was prepared for synthesis urea with a Faraday efficiency (FE) of 12.8%, urea yield of 9.2 mmol g-1 h-1 and urea current density 0.47 mA cm-2,while maintaining long-term stability. The Bi2 O3 /B-RGO possess a unique porous structure with continuous micron pores that facilitated the rapid mass transfer, improved kinetic efficiency and enlarged electroactive sites, which together improve the urea synthesis performance. Interestingly, the Bi2 O3/B-RGO electrocatalyst is not only have excellent electrochemical properties, but also favours the adsorption and activation of reactants (N2 and CO2 ) due to the B-RGO (Lewis acid) and the Bi2O3 (Lewis base). This work may provide new insights into the exploration of advanced catalysts for electrochemical urea synthesis and other sustainable applications. © 2024, The Authors. All rights reserved.

关键词： Urea

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Sprayed Pickering emulsion with high antibacterial activity for wound healing

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Progress in Natural Science:Materials International 2020年第5期30卷 669-676页

作者： Xieru Bao Jie Wu Guanghui Ma State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences School of Chemical Engineering University of Chinese Academy of Sciences PLA Key Laboratory of Biopharmaceutical Production and Formulation Engineering Institute of Process Engineering Chinese Academy of Sciences Jiangsu National Synergetic Innovation Center for Advanced Materials

Effective treatment of wound injuries can prevent infections and promote healing. In this work, a sprayed Pickering emulsion composed of chitosan nanoparticles, tea tree oil and curcumin was formulated. The shear thinning behaviour allowed this Pickering emulsion to spray even with a high viscosity provided by the aqueous phase containing chitosan nanoparticles. Moreover, the Pickering emulsion could recover to the high viscosity after spraying onto the wounds, leading to the long residence time and intimate contact. In addition, the Pickering emulsion provided a carrier to encapsulate the tea tree oil, which caused sustained-release effects and further strengthened tea tree oil’s antibacterial activity towards the Gram-negative Escherichia coli(E. coli),Gram-positive Staphylococcus aureus(S. aureus) and Gram-positive methicillin-resistant Staphylococcus aureus(MRSA). Besides, this multi-phase system offered a platform to load with hydrophobic curcumin, leading to better synergistic healing effects. Meanwhile, the Pickering emulsion avoided the irritation and toxicity related to surfactants, which was far safer than the classical emulsion especially when used in the defective skin. All these excellent properties endowed this sprayed Pickering emulsion with promising prospects for wound healing.

关键词： Pickering emulsion Wound healing Chitosan nanoparticles High viscosity Antibacterial activity

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Electrochemical co-reduction of N2 and CO2 to urea using In2S3 anchored on S-doped reduced graphene oxide

SSRN

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SSRN 2024年

作者： Chen, Xinyi Xing, Pingxing Wei, Shenqi Luo, Hualan Dai, Liyi Wang, Yuanyuan State Key Laboratory of Petroleum Molecular & Process Engineering East China Normal University No. 500 Dongchuan Road Shanghai200241 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai200062 China

The generation of urea by electrocatalysis using N2 and CO2 as feedstock is considered as a promising and green sustainable alternative to conventional energy-consuming industrial processes. Based on the existing studies, it was found that the effective adsorption and activation of N2 and CO2 on the catalyst surface is the primary condition for electrocatalytic generation, while the main by-product hydrogen evolution reaction (HER). should be avoided as much as possible in order to improve the yield. In this paper, an In2S3-loaded electrocatalyst on sulfur-doped reduced graphene oxide for urea synthesis was designed and prepared with an average Faraday efficiency (FE) of 37.17% and a urea yield of 7.24 mmol g-1 h-1, while maintaining long-term stability. In2S3@S-RGO has a unique porous structure of doped graphene, with continuous micron-sized pores that facilitate fast mass transfer, improve kinetic efficiency, and expand electroactive sites, thus enhancing the urea synthesis performance. Interestingly, the In2S3@S-RGO electrocatalyst not only exhibits excellent electrochemical performance, but also facilitates the adsorption and activation of reactants (N2 and CO2) due to the inhibitory effect of the indium-based material on HER. This work may provide new ideas for advanced catalysts to improve the efficiency of electrochemical synthesis of urea Faraday and to facilitate C-N coupling applications. © 2024, The Authors. All rights reserved.

关键词： Urea

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Ionic Effect Enhanced the Adsorption of Phosphorus-Containing Organics from Complex Wastewater

SSRN

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SSRN 2025年

作者： Li, Zhiqiang Wang, Rongyue Jia, Wenting Ning, Pengge Cao, Hongbin State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of Sciences Beijing100049 China Chemistry and Chemical Engineering Data Center Chinese Academy of Sciences Beijing100049 China National Engineering Research Center of Green Recycling for Strategic Metal Resources Chinese Academy of Sciences Beijing100049 China Institute of Process Engineering Chinese Academy of Science Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China

Achieving the complete adsorption of phosphorus-containing organics from the complex wastewater generated during the recycling process of waste batteries is a critical environment challenge. The research findings of this work reveal that in complex solution systems, ions can significantly alter the hydrophilicity or structural morphology of phosphorus-containing organic compounds, thereby influencing their adsorption efficacy. Based on these insights, an innovative adsorption strategy based on ion-regulation was proposed for the complete removal of phosphorus-containing organics from complex wastewater. By precisely modulating the concentration of H3O+ ions within actual cobalt extraction wastewater prior to the adsorption process, we achieved a removal rate exceeding 99.98% for phosphorus-containing organics. This breakthrough offers innovative perspectives for the comprehensive removal of organic pollutants in complex wastewaters within the waste battery recycling sector and provides important guarantees for the industry’s environmental health and sustainable development. © 2025, The Authors. All rights reserved.

关键词： Sustainable development

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Coupling of Struvite Crystallization and Aqueous Phase Recirculation for Hydrochar Upgrading and Nitrogen Recovery During Hydrothermal Carbonization of Sewage Sludge

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SSRN 2024年

作者： Gou, Le Dai, Liyi Wang, Yuanyuan State Key Laboratory of Petroleum Molecular & Process Engineering East China Normal University No. 500 Dongchuan Road Shanghai200241 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai200062 China

ABSTRCATRecycling of aqueous phase (AP) as a by-product after hydrothermal carbonization (HTC) of sewage sludge (SS) has been of interest. The combination of magnesium ammonium phosphate (MAP) or the so-called struvite crystallization and aqueous phase (AP) recirculation has great potential for resource recovery and hydrochar enhancement. In this study, both the aqueous phase of HTC after MAP recovery of NH4+-N (AP-MAP) and the untreated aqueous phase of HTC (AP-HTC) were reused for HTC of fresh SS, and both aqueous phases were recycled four times. The effects of the two AP cycles on the properties of AP and hydrochar at 200, 230, and 260°C were studied, and the effect of temperature on the two AP cycles was similar. The hydrochar produced by the AP-MAP cycle had lower nitrogen content than that of the AP-HTC cycle due to the low ammonia nitrogen (NH4+-N) content, and the combustion performance was improved. MAP recovery reduces the accumulation of NH4+-N in the AP cycle and MAP is also a high-quality fertilizer. Therefore, the combination of MAP recovery and AP recycling provides a feasible technical approach for resource utilization, eutrophic AP treatment, and production of high-quality hydrochar in the HTC process of SS. © 2024, The Authors. All rights reserved.

关键词： Sewage sludge

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Three-Dimensional N-Doped Graphene Coated with B-Doped Iron Phosphide Electrocatalysts: Nonmetallic Element Co-Modification for Enhanced Dual-Ph Hydrogen Evolution Reaction

SSRN

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SSRN 2024年

作者： Wei, Shenqi Xing, Pingxing Luo, Hualan Chen, Xinyi Dai, Liyi Wang, Yuanyuan State Key Laboratory of Petroleum Molecular & Process Engineering East China Normal University No. 500 Dongchuan Road Shanghai200241 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai200062 China

The construction of cost-effective and highly active transition metal phosphide-based electrocatalysts instead of noble metals through a feasible strategy is crucial for addressing the energy crisis. Herein, a novel three-dimensional structure N-doped RGO coated with a ‘worm-like’ B-doped FeP electrocatalyst (B-FeP/N-RGO) was successfully developed using a multi-step reaction. The composite catalyst possesses a unique three-dimensional structure that facilitates rapid mass transfer, gas release and exposure of abundant active sites, and non-metallic element doping optimizes the electronic structure of the matrix, which together improve the hydrogen evolution reaction performance. Notably, the B-FeP/N-RGO catalysts can achieve a current density of 10 mA cm-2 in both acidic and alkaline electrolytes with overpotentials of only 125 and 176 mV, while maintaining long-term stability. This study offers a promising approach for designing and fabricating highly efficient three-dimensional electrocatalysts that do not rely on noble-metals and are suitable for a wide pH range. © 2024, The Authors. All rights reserved.

关键词： Electrocatalysts

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Synthesis of TiCl_(2) powders through reactive gas phase infiltration in a fluidized bed reactor

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Particuology 2021年第4期19卷 95-103页

作者： Miao Song Yafeng Yang Hongdan Zhao Maoqiao Xiang Qingshan Zhu Jibin Jia Chaoquan Hu Fen Yue State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211135China

TiCl_(2) is a promising precursor for producing metallic titanium alloys and titanium-based ***,the effective synthesis of high-quality TiCl_(2) powder remains ***,a fluidized bed reactor(FBR)providing a high gas-solid contact area was employed to synthesize TiCl_(2) powder using a reliable TiCl_(4)-Ti reaction *** reaction conditions(600℃and 120 min)were determined for the proposed Ti-TiCl_(4) system by kinetic investigation.A dense Ti layer was regenerated upon the original surface of the Ti powder as a result of TiCl_(2) disproportionation at high temperature(above 700℃),which impeded infiltration by gaseous TiCl_(4).The particle size of the Ti reducing agent played a vital role in the production of TiCl_(2) powder.A mean particle size of 24.5μm was confirmed to be the most feasible option based on the optimal chlorinated depth(17μm).

关键词： Titanium dichloride Fluidization Kinetics Analysis

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