Self-supporting copper electrode prepared by ultrasonic impact for hydrogen evolution reaction

Cheng, Mei-Yue Cheng, Chuan-Qi Feng, Yi Fu, Le-Qi Zhang, Fei-Fei Yang, Tian-Tian Li, Zhe Ruan, Yi-Chen Yang, Zhen-Wen Lin, Kui Liu, Hui Du, Xi-Wen

Journal of Alloys and Compounds2022，Vol.9167.DOI:10.1016/j.jallcom.2022.165283

来源：

NSTL
Elsevier

Self-supporting copper electrode prepared by ultrasonic impact for hydrogen evolution reaction

Cheng, Mei-Yue ¹Cheng, Chuan-Qi ¹Feng, Yi ¹Fu, Le-Qi ¹Zhang, Fei-Fei ¹Yang, Tian-Tian ¹Li, Zhe ¹Ruan, Yi-Chen ¹Yang, Zhen-Wen ¹Lin, Kui ¹Liu, Hui ¹Du, Xi-Wen¹

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作者信息

1. Tianjin Univ
折叠

Abstract

Water electrolysis for hydrogen production requires highly active and inexpensive catalysts. Herein, we combine ultrasonic impact nanocrystallization (UIN) technology with nital etching method to rapidly prepare highly efficient self-supporting Cu electrode with abundant low-angle grain boundaries. When used as a catalyst for hydrogen evolution reaction (HER), the as-prepared electrode exhibits an overpotential of 353 mV at a current density of 10 mA cm-2, which is about 200 mV lower than that of the blank Cu plate. Moreover, the overpotential decreased to 246 mV after the stability test of 100 h, indicating a self-optimizing property. This work paves a new way for the preparation of self-supporting electrode with high performance.

Key words

Ultrasonic impact/Self-supporting electrode/HER/Dislocation/Copper/IN-SITU/STRAIN/ELECTROCATALYSTS/DISLOCATIONS/CU(111)/OXYGEN/STM

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出版年

2022

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

被引量5

参考文献量36

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