Yin-Yang Harmony: Metal and Nonmetal Dual-Doping Boosts Electrocatalytic Activity for Alkaline Hydrogen Evolution
Yin-Yang Harmony: Metal and Nonmetal Dual-Doping Boosts Electrocatalytic Activity for Alkaline Hydrogen Evolution
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DOI：
10.1021/acsenergylett.8b01893
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发表时间：
2018-10
影响因子：
22
通讯作者：
Kun Xu;Yiqiang Sun;Yuanmiao Sun;Yongqi Zhang;Guichong Jia;Qinghua Zhang;Lin Gu;Shuzhou Li
中科院分区：
文献类型：
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作者：
Kun Xu;Yiqiang Sun;Yuanmiao Sun;Yongqi Zhang;Guichong Jia;Qinghua Zhang;Lin Gu;Shuzhou Li
活性中心数、水解离和氢吸附自由能是调控碱性介质中析氢反应电催化剂活性的三个主要参数。然而，目前，同时调节这三个参数的碱性HER仍然具有挑战性。在这项工作中，我们以CoP为模型材料，并证明了金属和非金属双掺杂策略可以通过诱导晶格不规则性和优化CoP纳米材料中的电子构型来实现这三个参数的同时调制。得益于氧和铜双掺杂的集体效应，优化的O，Cu-CoP纳米线阵列电极对碱性HER的催化活性比纯CoP纳米线电极提高了近10倍。我们的工作可能为提高非贵金属电催化剂的碱性HER性能提供一个新的概念。
Active site number, water dissociation, and hydrogen adsorption free energy are the three main parameters for regulating the activity of electrocatalysts for hydrogen evolution reaction (HER) in alkaline media. However, at present, simultaneous modulations of these three parameters for alkaline HER still remain challenging. In this work, we take CoP as the model material and demonstrate that a metal and nonmetal dual-doping strategy can achieve simultaneous modulation of these three parameters by inducing lattice irregularity and optimizing the electronic configuration in CoP nanomaterials. Benefiting from the oxygen and copper dual-doping collective effect, the optimized O,Cu–CoP nanowire array electrode shows nearly 10-fold enhancement in catalytic activity for alkaline HER compared to a pure CoP nanowire electrode. Our work may provide a new concept to boost performance of nonprecious metal electrocatalysts for alkaline HER.