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Interlayer Cu2+modulation of local electronic structures in CuO1-x@Cu-MnO2 core-shell nanoarrays for synergistic photothermal formaldehyde degradation

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APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY 2025年 371卷

作者： Liu, Jianhua Sun, Xiao Dong, Liting Hou, Tianyuan Chen, Shougang Ocean Univ China Sch Mat Sci & Engn Qingdao 266100 Peoples R China

Photothermal catalytic oxidation of formaldehyde (HCHO) into CO2 and H2O offers a promising solution to mitigate indoor air pollution caused by interior decoration. However, the unclear photothermal synergistic mechanism limits advancements in improving photogenerated charge utilization efficiency and surface mineralization reaction kinetics. This work developed CuO1-x@Cu1-MnO2 core-shell nanoarrays by "Double Selfsacrificial Template method" and systematically investigated the role of interlayer Cu2 + in enhancing mineralization efficiency by modulating the local electronic structure and energy band alignment. Magnetization profiles (VSM), electron paramagnetic resonance (EPR), and density-functional theory (DFT) simulations revealed that interlayer Cu2+ ions facilitated the transition of local Mn3+ sites in the MnO2 shell to low-spin state, enhancing HCHO adsorption and activation. Photovoltaic and photothermal tests demonstrated that the Z-type heterojunction electron transfer mechanism, enabled by interlayer Cu2+ as an interfacial bridge, effectively mitigated the antagonism between photocatalysis and thermocatalysis. In situ DRIFT spectroscopy and EPR confirmed that the synergistic photothermal effect generated higher reactive oxygen species (ROS) yields and improved reaction kinetics. Under 0.3 W cm-2 light, formaldehyde removal reached 96.66 %, with a mineralization rate of 97 % within 2 h. We believe this work will offer valuable insights for designing high-performance catalysts for efficient formaldehyde removal.

关键词： core-shell nanoarrays Local electronic structure Formaldehyde oxidation Photothermal synergistic catalysis Reactive oxygen species

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Layered double hydroxide-based core-shell nanoarrays for efficient electrochemical water splitting

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Frontiers of Chemical Science and Engineering 2018年第3期12卷 537-554页

作者： Wenfu Xie Zhenhua Li Mingfei Shao Min Wei State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China

Electrochemical water splitting is an efficient and clean strategy to produce sustainable energy produc- tions （especially hydrogen） from earth-abundant water. Recently, layered double hydroxide （LDH）-based materi- als have gained increasing attentions as promising electrocatalysts for water splitting. Designing LDHs into hierarchical architectures （e.g., core-shell nanoarrays） is one of the most promising strategies to improve their electrocatalytic performances, owing to the abundant exposure of active sites. This review mainly focuses on recent progress on the synthesis of hierarchical LDH-based core-shell nanoarrays as high performance electrocatalysts for electrochemical water splitting. By classifying different nanostructured materials combined with LDHs, a number of LDH-based core-shell nanoarrays have been developed and their synthesis strategies, structural characters and electrochemical performances are rationally described. Moreover, further developments and challenges in devel- oping promising electrocatalysts based on hierarchical nanostructured LDHs are covered from the viewpoint of fundamental research and practical applications.

关键词： layered double hydroxides (LDHs) core-shell nanoarrays oxygen evolution reaction (OER) hydrogen evolution reaction (HER) photoelectrochemical water splitting (PEC)

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CC@BCN@PANI core-shell nanoarrays as ultra-high cycle stability cathode for Zn-ion hybrid supercapacitors

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Frontiers in Energy 2023年第4期17卷 555-566页

作者： Shixian XIONG Hongcheng KE Lei CAO Yu WANG Qian ZHU Liqin ZHONG Lanlan FAN Feng GU Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices/Jiangxi Provincial Key Laboratory for Simulation and Modelling of Particulate Systems International Institute for InnovationJiangxi University of Science and TechnologyNanchang330013China

Exploring cathode materials that combine excellent cycling stability and high energy density poses a challenge to aqueous Zn-ion hybrid supercapacitors(ZHSCs).Herein,polyaniline(PANI)coated boron-carbon-nitrogen(BCN)nanoarray on carbon cloth surface is prepared as advanced cathode materials via simple high-temperature calcination and electrochemical deposition *** of the excellent specific capacity and conductivity of PANI,the CC@BCN@PANI core-shell nanoarrays cathode shows an excellent ion storage ***,the 3D nanoarray structure can provide enough space for the volume expansion and contraction of PANI in the charging/discharging cycles,which effectively avoids the collapse of the microstructure and greatly improves the electrochemical stability of ***,the CC@BCN@PANI-based ZHSCs exhibit superior electrochemical performances showing a specific capacity of 145.8 mAh/g,a high energy density of 116.78 Wh/kg,an excellent power density of 12 kW/kg,and a capacity retention rate of 86.2%after 8000 charge/discharge cycles at a current density of 2 A/*** addition,the flexible ZHSCs(FZHSCs)also show a capacity retention rate of 87.7%at the current density of 2 A/g after 450 cycles.

关键词： CC@BCN@PANI cathode Zn-ion hybrid supercapacitor core-shell nanoarrays high energy density ultra-high cycle stability

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Stepwise Construction of MoS2@CoAl-LDH/NF 3D core-shell nanoarrays with High Hole Mobility for High-Performance Asymmetric Supercapacitors

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ACS APPLIED MATERIALS & INTERFACES 2024年第25期16卷 32434-32444页

作者： Yan, Yue Wu, Wenrui Yang, Yang Xu, Tao Li, Xianfu Anhui Polytech Univ Sch Chem & Environm Engn Wuhu 241000 Peoples R China South Dakota Sch Mines & Technol Dept Chem & Appl Biol Sci Rapid City SD 57701 USA Anhui Prov Key Lab High Performance Film Capacitor Wuhu 241000 Anhui Peoples R China

Supercapacitors (SCs) have received widespread attention as excellent energy storage devices, and the design of multicomponent electrode materials and the construction of ingenious structures are the keys to enhancing the performance of SCs. In this paper, MoS2 nanorods were used as the carrier structure to induce the anchoring of CoAl-LDH nanosheets and grow on the surface of nickel foam (NF) in situ, thus obtaining a uniformly distributed MoS2 nanorod@CoAl-LDH nanosheet core-shell nanoarray material (MoS2@CoAl-LDH/NF). On the one hand, the nanorod-structured MoS2 as the core provides high conductivity and support, accelerates electron transfer, and avoids agglomeration of CoAl-LDH nanosheets. On the other hand, CoAl-LDH nanosheet arrays have abundant interfacially active sites, which accelerate the electrolyte penetration and enhance the electrochemical activity. The synergistic effect of the two components and the unique core-shell nanostructure give MoS2@CoAl-LDH/NF a high capacity (14,888.8 mF cm(-2) at 2 mA cm(-2)) and long-term cycling performance (104.4% retention after 5000 charge/discharge cycles). The integrated MoS2@CoAl-LDH/NF//AC device boasts a voltage range spanning from 0 to 1.5 V, achieving a peak energy density of 0.19 mW h cm(-2) at 1.5 mW cm(-2). Impressively, it maintains a capacitance retention rate of 84.6% after enduring 10,000 cycles, demonstrating exceptional durability and stability.

关键词： MoS2 nanorods CoAl-LDH nanosheets core-shell nanoarrays in situ growth stepwiseconstruction

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Hierarchical NiCo2O4@Ni(OH)2 core-shell nanoarrays as advanced electrodes for asymmetric supercapacitors with high energy density

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JOURNAL OF ALLOYS AND COMPOUNDS 2019年 771卷 784-792页

作者： Xia, Ping Wang, Qiyuan Wang, Yintao Quan, Wei Jiang, Deli Chen, Min Jiangsu Univ Sch Chem & Chem Engn Zhenjiang 212013 Peoples R China

Development of high-performance supercapacitors with high energy density is urgently required for energy storage device but remains challenging. In this work, novel NiCo2O4@Ni(OH)(2) (denoted as NCO-NH) core-shell nanoarrays were synthesized. Benefiting from the structural and compositional advantages, the NCO-NH core-shell nanoarrays exhibited high specific capacitances (2218.0 and 1796.0 F g(-1) at current densities of 1 and 10 A g(-1), respectively) and outstanding cycling stability (96.4% retention of the initial specific capacitance at 10 A g(-1) after 5000 cycles). Using such NCO-NH nanoarrays as cathode and activated carbon as anode, an asymmetric supercapacitor (ASC) is further fabricated. This ASC device achieves a high energy density of 98.5 Wh kg(-1) at a power density of 800 W kg(-1) (at current densities of 1 A g(-1)) and an energy density of 61.5 Wh kg(-1) at a high power density of 8000 W kg(-1) (at current densities of 10 A g(-1)). This work highlights that construction of core-shell nanoarrays by coupling of bimetallic oxide with hydroxide could be a feasible way to obtain advanced electrode materials for high-performance supercapacitors. (C) 2018 Elsevier B.V. All rights reserved.

关键词： NiCo2O4 Ni(OH)(2) core-shell nanoarrays Electrochemical performance Asymmetric supercapacitor

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Three-dimensional coral-like NiCoP@C@Ni(OH)2 core-shell nanoarrays as battery-type electrodes to enhance cycle stability and energy density for hybrid supercapacitors

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CHEMICAL ENGINEERING JOURNAL 2019年 361卷 1-11页

作者： Zong, Quan Yang, Hui Wang, Qianqian Zhang, Qilong Zhu, Yulu Wang, Huiying Shen, Qianhong Zhejiang Univ Sch Mat Sci & Engn State Key Lab Silicon Mat Hangzhou 310027 Peoples R China Zhejiang Univ Zhejiang Calif Int NanoSyst Inst Hangzhou 310058 Zhejiang Peoples R China

Transitional metal phosphides (TMPs) are regarded as comparatively promising electrode materials for energy storage and conversion. However, the poor cycling performance of TMPs remains to be a major challenge of their practical application for supercapacitor. In this work, coral-like NiCoP@C@Ni(OH)(2) core-shell nanoarrays are vertically grown on nickel foams using two-step hydrothermal reaction, followed by carbonization and phosphorization treatment. The participation of amorphous carbon layer and ultrathin Ni(OH)2 nanosheets is expected to improve the performance of cycling stability and energy density. This NiCoP@C@Ni(OH)(2) NAs exhibit high specific capacitance of 2300.8 F g(-1) at a density of 1 A g(-1), good rate capability (72.1% of capacitance at 20 A g(-1)) and long-term cycling stability (81.2% retention after 3000 cycles at 10 A g(-1)). Moreover, with the help of ultrathin Ni(OH)(2) nanosheets, a hybrid supercapacitor assembled by the NiCoP@C@Ni(OH)(2) NAs electrode against activated carbon achieves a high energy density (49.5 Wh kg(-1) at a power density of 399.8Wkg(-1)). These results demonstrate that such NiCoP@C@Ni(OH)(2) NAs hold great promise as novel battery- like electrode for hybrid supercapacitors in energy conversion.

关键词： core-shell nanoarrays Battery-type Good cycling stability High energy density Hybrid supercapacitor

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Three-dimensional interconnected MnCo₂O₄ nanosheets@MnMoO₄ nanosheets core-shell nanoarrays on Ni foam for high-performance supercapacitors

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CHEMICAL ENGINEERING JOURNAL 2018年 336卷 64-73页

作者： Lv, Yamei Liu, Aifeng Che, Hongwei Mu, Jingbo Guo, Zengcai Zhang, Xiaoliang Bai, Yongmei Zhang, Zhixiao Wang, Guangshuo Pei, Zhenzhao Hebei Univ Engn Coll Mat Sci & Engn Handan 056038 Peoples R China

Rational design and fabrication of core-shell nanoarrays (CSNs) with distinctive architectures and desirable capacitive performances are believed to be a promising and challenging strategy toward advanced electrode materials for supercapacitors (SCs). In this work, we report a two-step synthesis of three-dimensional (3D) MnCo2O4 nanosheets@MnMoO4 nanosheets CSNs on Ni foam (NF), which are constructed by vertically growing MnMoO4 nanosheets onto interconnected MnCo2O4 nanosheets arrays (NAs). Such MnCo2O4@MnMoO4 CSNs can make full use of its unique 3D architecture and the synergistic effect between MnCo2O4 and MnMoO4. Therefore, the prepared MnCo2O4@MnMoO4 CSNs, as a binder-free electrode for SCs, demonstrate a significantly enhanced specific capacity (885 C g(-1) at 3 A g(-1)), higher rate capability (629 C g(-1) at 30 A g(-1)), and better cycling stability (95% capacitance retention after 5000 cycles at 10 A g(-1)) compared with the single MnCo2O4 or MnMoO4 NAs electrode. Moreover, the assembled asymmetric SC cell (ASC) based on MnCo2O4@MnMoO4//activated carbon (AC) also exhibits a specific capacity (222 C g(-1) at 1 A g(-1)) and an energy density (49.4Wh kg(-1) at 815W kg(-1)), indicating a promising practical application for the prepared MnCo2O4@MnMoO4 CSNs in high-performance SCs.

关键词： MnCo2O4 MnMoO4 core-shell nanoarrays Energy storage Supercapacitor

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Needle-like NiS?@MnCoO? core-shell nanoarrays with high charge storage performance for application in hybrid supercapacitors

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JOURNAL OF ENERGY STORAGE 2022年 47卷

作者： Yan, Liqing Deng, Xiaoli Huang, Haifu Han, Yu Yan, Faxin Xu, Shuaikai Liang, Xianqing Zhou, Wenzheng Guo, Jin Guangxi Univ Sch Phys Sci & TechnolGuangxi Novel Battery Mat Guangxi Key Lab Relativist AstrophysCtr Nanoener Guangxi Coll & Univ Key Lab Novel Energy Mat & Re Nanning 530004 Peoples R China Guangxi Univ Guangxi Key Lab Proc Nonferrous Met & Featured Ma Nanning 530004 Peoples R China

Herein, this work demonstrates the design and synthesis of multicomponent hybrid material NiS chi@MnCoO chi/NF core-shell nanoarrays with high charge storage performance for supercapacitors. The needle-like MnCoO chi & nbsp;nanoarrays as the skeleton of the core layer are grown vertically on the Ni foam via a hydrothermal method, while the NiS chi & nbsp;nanosheets are engineered to anchor onto the surface to form the shell via an electrodeposition method. The unique core-shell architecture provides a large number of reactive sites for MnCoO chi & nbsp;and NiS chi, enhances the number of ion diffusion channels and fast electron transfer pathway. As advanced electrode, NiS chi@MnCoO chi/NF delivers a high specific capacity of 1358 C g(-1) (4.84 C cm(-2)) at 0.5 A g(-1), which is 2.05 times that of MnCoO chi/NF (661 C g(-1) or 1.35 C cm(-2)). Furthermore, the hybrid supercapacitor device (NiS chi@MnCoO chi/NF//rGO/NF) exhibits a high specific capacitance of 181.71 F g(-1) (2.26 F cm(-2)), a long cycle life, and a maximum specific energy of 64.61 Wh kg(-1), suggesting a great potential for practical application. Therefore, an ingeniously designed core-shell array structure can effectively realize the charge storage potential of the Mn-Co oxides and Ni sulfides, and this work presents an alternative method for constructing hybrid architectures for advanced electrochemical energy storage materials.

关键词： Supercapacitors Mn-Co oxides Ni sulfides core-shell nanoarrays

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NiCoP@CoS tree-like core-shell nanoarrays on nickel foam as battery-type electrodes for supercapacitors

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CHEMICAL ENGINEERING JOURNAL 2021年第Part2期421卷

作者： Xu, Zhenyang Du, Cuicui Yang, Haokun Huang, Junlin Zhang, Xiaohua Chen, Jinhua Hunan Univ Coll Chem & Chem Engn State Key Lab Chemo Biosensing & Chemometr Changsha 410082 Hunan Peoples R China

High-performance supercapacitors as the promising energy storage devices have attracted considerable research interests, due to the apparent merits of high power density, fast charge/discharge, and long lifetime. However, their further practical applications are still greatly hindered by the limited energy density, as well as low capacitance, inferior rate capability and poor cycling performance of the electrode materials. Herein, threedimensional (3D) hierarchical NiCoP@CoS tree-like core-shell nanoarrays (NAs) on nickel foam (NF) are obtained with the vertically grown NiCoP nanowires as core via phosphorization of NiCo2O4 nanowires arrays, and the subsequently electrodeposited CoS nanosheets as shell. The 3D hierarchical tree-like core-shell nanoarrays take advantages of one-dimensional (1D) core as "hyperchannel" for electron transfer, coupling with twodimensional (2D) vertical shell for fast ion diffusion meanwhile enhancement of cycling stability. The proposed NiCoP@CoS NAs/NF electrode exhibits superior battery-type electrochemical supercapacitor performance via the synergy of NiCoP nanowires and CoS nanosheets, which delivers a high specific capacitance of 1796 F g-1 at 2 A g-1, outstanding rate capability and good cycling stability with high capacitance retention of 91.4% after 5000 cycles even at 10 A g-1. Furthermore, the asymmetric supercapacitor assembled by NiCoP@CoS NAs/NF and activated carbon achieves a high energy density (35.8 Wh kg- 1) at a power density of 748.9 W kg- 1. The asfabricated NiCoP@CoS tree-like core-shell nanoarrays hold great promise as novel battery-type electrodes for high-performance supercapacitor applications.

关键词： NiCoP nanowires CoS nanosheets core-shell nanoarrays Battery-type electrodes Supercapacitors

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Hierarchically structured Co3O4@glucose-modified LDH architectures for high-performance supercapacitors

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APPLIED SURFACE SCIENCE 2019年 488卷 639-647页

作者： Quan, Wei Xu, Yuyan Wang, Yintao Meng, Suci Jiang, Deli Chen, Min Jiangsu Univ Sch Chem & Chem Engn Xuefu Rd 301 Zhenjiang 212013 Jiangsu Peoples R China

Constructing three-dimensional (3D) heterostructures with fast electrochemical reaction kinetics is of great importance in energy storage and conversion, yet remains huge challenges. Herein, we report the design and construction of a family of hierarchically architecture comprising of glucose-modified layered double hydroxides nanosheets wrapped Co3O4 nanowire arrays on Ni foam (CIML-m;I=Ni, Co;M=Mn, Co, Al;Ni foam=NF) for high-performance electrodes. LDH-m nanosheet with expanded interplanar spacing resulted from the glucose molecule intercalation is more favorable for the diffusion of ions, further boosting the electrochemical performance. Benefiting from this feature, the optimal 3D core-shell Co3O4@NiMn LDH (CNMnL-m) architectures exhibits an excellent pseudocapacitive performance of 1644 F g(-1) at 1 A g(-1) with excellent cycling stability of 94.2% over 5000 cycles. Such heterostructure exhibits an excellent practical use when employed as a positive electrode in an asymmetric supercapacitor with high energy density of 38.4 W h kg(-1) at power density of 800 W kg(-1). Given the method's generality, this work opens new avenues in controlled design and synthesis of 3D core-shell heterostructures for developing high-performance electrodes in energy storage and conversion.

关键词： Layered double hydroxides Co3O4 core-shell nanoarrays Asymmetric supercapacitor

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