Photodeposition fabrication of hierarchical layered Co-doped Ni oxyhydroxide (NixCo1-xOOH) catalysts with enhanced electrocatalytic performance for oxygen evolution reaction
Photodeposition fabrication of hierarchical layered Co-doped Ni oxyhydroxide (NixCo1-xOOH) catalysts with enhanced electrocatalytic performance for oxygen evolution reaction
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DOI：
10.1007/s12274-019-2607-1
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发表时间：
2020-01-02
期刊：
影响因子：
9.9
通讯作者：
Wang, Jianming
中科院分区：
文献类型：
--
作者：
Huang, Liang-ai;He, Zhishun;Wang, Jianming
高活性、耐久性和廉价的析氧反应（OER）催化剂对于实现实用和高效的水裂解至关重要。本文采用光沉积法制备了负载在TiO 2/Ti衬底上的NixCo 1-xOOH纳米片阵列。与纯NiOOH相比，所得NixCo 1-xOOH纳米片阵列具有更大的暴露电化学活性表面积、更快的电子转移和收集速度以及更强的电子相互作用，在10（-2）的电流密度下显示出350 mV的低过电位，在碱性溶液中显示出41 mV.dec（-1）的小Tafel斜率，OER性能上级优于纯NiOOH和大多数Ni基催化剂. mA.cm此外，NixCo 1-xOOH电极在10（-2）的电流密度下24小时表现出优异的稳定性，这归因于由催化剂和基底的良好粘附引起的结构维持。mA.cm本研究为合理设计高活性和有前途的OER电催化剂提供了一种新的途径。
Highly active, durable and inexpensive oxygen evolution reaction (OER) catalysts are crucial for achieving practical and high-efficiency water splitting. Herein, hierarchical interconnected NixCo1-xOOH nanosheet arrays supported on TiO2/Ti substrate have been fabricated through a facile photodeposition method. Compared with pristine NiOOH, the obtained NixCo1-xOOH nanosheet arrays possess larger exposed electrochemical active surface area, faster transfer and collection of electrons and stronger electronic interaction, showing a low overpotential of 350 mV at a current density of 10 mA.cm(-2) and a small Tafel slope of 41 mV.dec(-1) in basic solutions, with the OER performance superior to pristine NiOOH and most Ni-based catalysts. Furthermore, the NixCo1-xOOH electrode demonstrates excellent stability at the current density of 10 mA.cm(-2) for 24 hours, which is attributed to the structural maintenance caused by the good adhesion of the catalyst and the substrate. Our study provides an alternative approach for the rational design of highly active and promising OER electrocatalysts.