CoP nanoparticles combined with WS2 nanosheets as efficient electrocatalytic hydrogen evolution reaction catalyst
CoP nanoparticles combined with WS2 nanosheets as efficient electrocatalytic hydrogen evolution reaction catalyst
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CoP纳米颗粒与WS2纳米片结合作为高效电催化析氢反应催化剂
DOI：
10.1016/j.ijhydene.2016.12.019
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发表时间：
2017-02-16
影响因子：
7.2
通讯作者：
Fan, Xiaobin
中科院分区：
文献类型：
--
作者：
Jin, Jialei;Zhu, Yuanzhi;Fan, Xiaobin
通过电解水析氢反应制氢是解决能源危机和空气污染的一个很好的选择。近年来，地球上丰富的过渡金属磷化物，特别是 CoP，已成为有前途的析氢反应催化剂。目前，人们的注意力集中在将CoP与其他材料结合以提高其催化活性。在此，为了获得更好的析氢反应催化剂，我们将CoP纳米颗粒与WS2纳米片结合。设置不同的 CoP 与 WS2 质量比以找到最佳的催化活性。通过简单的超声诱导混合方法制备了 CoP/WS2 复合材料。所有CoP/WS2复合材料均比纯CoP纳米颗粒和WS2纳米片具有增强的析氢反应催化活性。特别是，优化后的CoP/WS2复合材料具有最低的起始过电势50 mV，过电势300 mV时的最大电流密度为78 mA/cm(2)，最小的塔菲尔斜率为64.63 mV/decade，表现出优异的析氢反应催化活性。
Producing hydrogen through hydrogen evolution reaction by electrolyzing water is a great alternative to solve the energy crisis and air pollution. Earth abundant transition-metal phosphides, especially CoP, have emerged as promising hydrogen evolution reaction catalysts for recent years. Nowadays, attention is focused on combining CoP with other materials to improve its catalytic activity. Herein, in order to get better hydrogen evolution reaction catalyst, we combined CoP nanoparticles with WS2 nanosheets. Different CoP to WS2 mass ratios were set to find the best catalytic activity. CoP/WS2 composites were prepared through a simple ultrasound induced mixing method. And all the CoP/WS2 composites have enhanced hydrogen evolution reaction catalytic activity than pure CoP nanoparticles and WS2 nanosheets. Especially, the optimized CoP/WS2 composite has the lowest onset overpotential of 50 mV, the largest current density of 78 mA/cm(2) at the overpotential of 300 mV, and the smallest Tafel slope of 64.63 mV/decade, indicating excellent hydrogen evolution reaction catalytic activity.