Citation: Kaili Zhang, Shengjue Deng, Yu Zhong, Yadong Wang, Jianbo Wu, Xiuli Wang, Xinhui Xia, Jiangping Tu. Rational construction of cross-linked porous nickel arrays for efficient oxygen evolution reaction[J]. Chinese Journal of Catalysis, ;2019, 40(7): 1063-1069. doi: 10.1016/S1872-2067(18)63194-8 shu

Rational construction of cross-linked porous nickel arrays for efficient oxygen evolution reaction

a State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;
b School of Engineering, Nanyang Polytechnic, 569830, Singapore;
c Zhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Taizhou 318000, Zhejiang, China

Received Date: 11 October 2018
Revised Date: 23 October 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (51772272, 51502263, 51728204), the Fundamental Research Funds for the Central Universities (2018QNA4011), Qianjiang Talents Plan of Zhejiang Province (QJD1602029), the Program for Innovative Research Team in University of Ministry of Education of China (IRT13037), and the Startup Foundation for Hundred-Talent Program of Zhejiang University. The authors acknowledge the SEM/TEM support from Qiaohong He, Xiaokun Ding and Fang Chen from Department of Chemistry, Zhejiang University.

It is important but challenging to design and fabricate an efficient and cost-effective electrocatalyst for the oxygen evolution reaction (OER). Herein, we report free-standing 3D nickel arrays with a cross-linked porous structure as interesting and high-performance electrocatalysts for OER via a facile one-step electrodeposition method. The 3D nickel arrays are strongly anchored on the substrate, forming self-supported electrocatalysts with reinforced structural stability and high electrical conductivity. Because of their increased active surface area, abundant channels for electron/ion transportation and enhanced electronic conductivity, the designed 3D nickel arrays exhibit superior electrocatalytic OER performance with a low overpotential (496 mV at 50 mA cm^-2) and a small Tafel slope (43 mV dec^-1) as well as long-term stability (no decay after 24 h) in alkaline solution. Our proposed rational design strategy may open up a new way to construct other advanced 3D porous materials for widespread application in electrocatalysis.
- Oxygen evolution reaction,
- Nickel arrays,
- Electrocatalysis,
- Porous structure,
- Electrodeposition
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