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首页> 外文期刊>Advanced energy materials >MOF Template-Directed Fabrication of Hierarchically Structured Electrocatalysts for Efficient Oxygen Evolution Reaction
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MOF Template-Directed Fabrication of Hierarchically Structured Electrocatalysts for Efficient Oxygen Evolution Reaction

机译：MOF模板指导的高效氧释放反应分层结构电催化剂的制备

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摘要

The ever-increasing demand for clean and renewable power sources has sparked intensive research on water splitting to produce hydrogen, in which the exploration of electrocatalysts is the central issue. Herein, a new strategy, metal-organic framework template-directed fabrication of hierarchically structured Co3O4@X (X = Co3O4, CoS, C, and CoP) electrocatalysts for efficient oxygen evolution reaction (OER) is developed, where Co3O4@X are derived from cobalt carbonatehydroxide@zeolitic-imidazolate-framework-67 (CCH@ZIF-67). Unique hierarchical structure and synergistic effect of resulting catalysts endow abundant exposed active sites, facile ion diffusion path, and improved conductivity, being favorable for improving catalytic activity of them. Consequently, these derivatives Co3O4@X reveal highly efficient electrocatalytic performance with long-term durability for the OER, much superior to previously reported cobalt-based catalysts as well as the Ir/C catalyst. Particularly, Co3O4@CoP exhibits the highest electrocatalytic capability with the lower overpotential of 238 mV at the current density of 10 mA cm(-2). Furthermore, Co3O4@X can also efficiently catalyze other small molecules through electro-oxidation reaction (e.g., glycerol, methanol, or ethanol). It is expected that the strategy presented here can be extended to the fabrication of other composite electrode materials with hierarchical structures for more efficient water splitting.
机译：对清洁和可再生电源的需求不断增长，引发了对将水分解产生氢气的深入研究，其中电催化剂的探索是中心问题。在本文中，开发了一种新的策略，即金属-有机框架模板指导的分层结构化Co3O4 @ X（X = Co3O4，CoS，C和CoP）电催化剂的制备，用于有效的氧释放反应（OER），其中衍生了Co3O4 @ X得自碳酸钴@沸石-咪唑啉-骨架67（CCH @ ZIF-67）。所得到的催化剂独特的层次结构和协同作用赋予其丰富的暴露活性位点，方便的离子扩散路径和提高的电导率，有利于提高它们的催化活性。因此，这些衍生物Co3O4 @ X对OER表现出高效的电催化性能和长期耐久性，远优于先前报道的钴基催化剂和Ir / C催化剂。特别是，Co3O4 @ CoP在电流密度为10 mA cm（-2）时显示出最高的电催化能力，而较低的过电势为238 mV。此外，Co 3 O 4 X还可以通过电氧化反应（例如甘油，甲醇或乙醇）有效地催化其他小分子。可以预期，此处介绍的策略可以扩展到具有分层结构的其他复合电极材料的制造，以实现更有效的水分解。

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  • 来源
    《Advanced energy materials》 |2017年第12期|1602643.1-1602643.10|共10页
  • 作者

    Zhou Jian; Dou Yibo; Zhou Awu; Guo Rui-Mei; Zhao Min-Jian; Li Jian-Rong;

  • 作者单位

    Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Dept Chem & Chem Engn, Coll Environm & Energy Engn, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Dept Chem & Chem Engn, Coll Environm & Energy Engn, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Dept Chem & Chem Engn, Coll Environm & Energy Engn, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Dept Chem & Chem Engn, Coll Environm & Energy Engn, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Dept Chem & Chem Engn, Coll Environm & Energy Engn, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Dept Chem & Chem Engn, Coll Environm & Energy Engn, Beijing 100124, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    electrocatalysts; hierarchical structures; metal-organic framework templates; oxygen evolution reaction;

    机译：电催化剂;分层结构;金属有机骨架模板;析氧反应;

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