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首页> 外文期刊>Advanced energy materials >Wrinkled Rh_2P Nanosheets as Superior pH-Universal Electrocatalysts for Hydrogen Evolution Catalysis
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Wrinkled Rh_2P Nanosheets as Superior pH-Universal Electrocatalysts for Hydrogen Evolution Catalysis

机译：起皱的Rh_2P纳米片作为用于制氢催化的卓越pH通用电催化剂

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摘要

Searching for highly efficient and durable electrocatalysts for the hydrogen evolution reaction (HER) that function effectively at all pHs is of great interest to the scientific community, however it is still a grand challenge, because the HER kinetics of Pt in alkaline solutions are approximately two to three orders of magnitude lower than that in acidic solution. Herein, a new class of wrinkled, ultrathin Rh2P nanosheets for enhancing HER catalysis at all pHs is reported. They exhibit a small overpotential of 18.3 mV at 10 mA cm(-2), low Tafel slope of 61.5 mV dec(-1), and good durability in alkaline media, much better than the commercial Pt/C catalyst. Density functional theory calculations reveal that the active open-shell effect from the P-3p band not only promotes Rh-4d for increased proton-electron charge exchange but also provides excellent p-p overlapping to locate the O-related species as distributary center, which can benefit the HER process in alkaline media. It is also demonstrated that the present wrinkled, ultrathin Rh2P nanosheets are highly efficient and durable electrocatalysts toward HER in both acid and neutral electrolytes. The present work opens a new material design for ultrathin 2D metal phosphide nanostructures for the purpose of boosting HER performance at all pHs.
机译：对于在所有pH值下都能有效发挥作用的析氢反应（HER），寻找高效耐用的电催化剂引起了科学界的极大兴趣，但这仍然是一个巨大的挑战，因为Pt在碱性溶液中的动力学约为2。比酸性溶液低三个数量级本文中，报道了用于在所有pH下增强HER催化作用的一类新的起皱的超薄Rh2P纳米片。它们在10 mA cm（-2）时表现出小的过电位18.3 mV，在61.5 mV dec（-1）时的Tafel斜率低，在碱性介质中具有良好的耐久性，比市售Pt / C催化剂好得多。密度泛函理论计算表明，P-3p谱带的主动开壳效应不仅促进Rh-4d促进质子-电子电荷交换，而且提供了出色的pp重叠，从而将O相关物种定位为分布中心。在碱性介质中有利于HER过程。还证明了本发明的起皱的，超薄的Rh2P纳米片是在酸性和中性电解质中的针对HER的高效且持久的电催化剂。本工作为超薄的2D金属磷化物纳米结构开启了新的材料设计，目的是在所有pH值下提高HER性能。

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  • 来源
    《Advanced energy materials》 |2018年第27期|1801891.1-1801891.7|共7页
  • 作者

    Wang Kai; Huang Bolong; Lin Fei; Lv Fan; Luo Minchuan; Zhou Peng; Liu Qiao; Zhang Weiyu; Yang Chao; Tang Yonghua; Yang Yong; Wang Wei; Wang Hao; Guo Shaojun;

  • 作者单位

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Kowloon, Hong Kong, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Lab Heat & Mass Transport Micronano Scale, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Lab Heat & Mass Transport Micronano Scale, Beijing 100871, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    2D; heterogeneous catalysts; hydrogen evolution reaction; metal phosphides; wrinkled structure;

    机译：二维;非均相催化剂;析氢反应;金属磷化物;起皱结构;

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