能源化学(英文版) ›› 2020, Vol. 47 ›› Issue (8): 263-271.DOI: 10.1016/j.jechem.2020.02.010

• • 上一篇    下一篇

In-situ optimizing the valence configuration of vanadium sites in NiV-LDH nanosheet arrays for enhanced hydrogen evolution reaction

Danyang Hea, Liyun Caoa, Jianfeng Huanga, Koji Kajiyoshib, Jianpeng Wua,changcong Wangc, Qianqian Liua,dan Yanga, Liangliang Fenga,b   

  1. a School of Materials Science&Engineering.Xi'an Key Laboratory of Green Processing for Ceramic Materials.Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials.Shaanxi University of Science and Technology.Xi'an 710021.Shaanxi.China;
    b Research Laboratory of Hydrothermal Chemistry.Faculty of Science and Technology.Kochi University.Kochi 780-8520.Japan;
    c State Key Laboratory of Solidification Processing.Carbon/carbon Composites Research Center.Northwestern Polytechnical University.Xi'an 710072.Shaanxi.China
  • 收稿日期:2019-12-26 修回日期:2020-01-22 出版日期:2020-08-15 发布日期:2020-12-18
  • 通讯作者: Liyun Cao, Liangliang Feng
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Nos.21701107.51672165).Natural Science Foundation of Shaanxi Province (2019JQ-018).Doctoral Scientific Research Startup Foundation of Shaanxi University of Science and Technology (2016QNBT-07).Platform construction Fund for Imported talent of Shaanxi University of Science and Technology (134080038).National Key R&D Program of China (2017YFB0308300) and Xi'an Key Laboratory of Green Manufacture of Ceramic materials Foundation (2019220214SYS017CG039).

In-situ optimizing the valence configuration of vanadium sites in NiV-LDH nanosheet arrays for enhanced hydrogen evolution reaction

Danyang Hea, Liyun Caoa, Jianfeng Huanga, Koji Kajiyoshib, Jianpeng Wua,changcong Wangc, Qianqian Liua,dan Yanga, Liangliang Fenga,b   

  1. a School of Materials Science&Engineering.Xi'an Key Laboratory of Green Processing for Ceramic Materials.Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials.Shaanxi University of Science and Technology.Xi'an 710021.Shaanxi.China;
    b Research Laboratory of Hydrothermal Chemistry.Faculty of Science and Technology.Kochi University.Kochi 780-8520.Japan;
    c State Key Laboratory of Solidification Processing.Carbon/carbon Composites Research Center.Northwestern Polytechnical University.Xi'an 710072.Shaanxi.China
  • Received:2019-12-26 Revised:2020-01-22 Online:2020-08-15 Published:2020-12-18
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.21701107.51672165).Natural Science Foundation of Shaanxi Province (2019JQ-018).Doctoral Scientific Research Startup Foundation of Shaanxi University of Science and Technology (2016QNBT-07).Platform construction Fund for Imported talent of Shaanxi University of Science and Technology (134080038).National Key R&D Program of China (2017YFB0308300) and Xi'an Key Laboratory of Green Manufacture of Ceramic materials Foundation (2019220214SYS017CG039).

摘要: Combining nanomaterials with complementary properties in a well-designed structure is an effective tactic to exploit multifunctional.high-performance materials for the energy conversion and storage.Nonprecious metal catalysts.such as cobalt oxide.with superior activity and excellent stability to other catalysts are widely desired.Nevertheless.the performance of CoO nanoparticles as an electrode material were significantly limit for its inferior conductivity.dissolution.and high cohesion.Herein.we grow ultrafine cobalt monoxide to decorate the interlayer and surface of the Ti3C2Tx nanosheets via a hydrothermal method companied by calcination.The layered MXenes act as the underlying conductive substrate.which not only increase the electron transfer rate at the interface but also greatly improve the electrochemical properties of the nanosized CoO particles by restricting the aggregation of CoO.The resulting CoO/Ti3C2Tx nanomaterial is applied as oxygen electrode for lithium-oxygen battery and achieves more than 160 cycles and first cycle capacity of 16,220 mAh g-1 at 100 mA g-1.This work paves a promising avenue for constructing a bi-functional catalyst by coupling the active component of a transition metal oxide (TMO) with the MXene materials in lithium-oxygen battery.

关键词: NiV-LDH, V sites, Valence configuration, Stability, Hydrogen evolution reaction

Abstract: Combining nanomaterials with complementary properties in a well-designed structure is an effective tactic to exploit multifunctional.high-performance materials for the energy conversion and storage.Nonprecious metal catalysts.such as cobalt oxide.with superior activity and excellent stability to other catalysts are widely desired.Nevertheless.the performance of CoO nanoparticles as an electrode material were significantly limit for its inferior conductivity.dissolution.and high cohesion.Herein.we grow ultrafine cobalt monoxide to decorate the interlayer and surface of the Ti3C2Tx nanosheets via a hydrothermal method companied by calcination.The layered MXenes act as the underlying conductive substrate.which not only increase the electron transfer rate at the interface but also greatly improve the electrochemical properties of the nanosized CoO particles by restricting the aggregation of CoO.The resulting CoO/Ti3C2Tx nanomaterial is applied as oxygen electrode for lithium-oxygen battery and achieves more than 160 cycles and first cycle capacity of 16,220 mAh g-1 at 100 mA g-1.This work paves a promising avenue for constructing a bi-functional catalyst by coupling the active component of a transition metal oxide (TMO) with the MXene materials in lithium-oxygen battery.

Key words: NiV-LDH, V sites, Valence configuration, Stability, Hydrogen evolution reaction