Bifunctional electrocatalyst of CoxFey-C for overall water splitting

被引：0

作者：

Yan, Yatao ^{[1
]}

Han, Yue ^{[1
]}

Wang, Feiyu ^{[1
]}

Hu, Yuting ^{[1
]}

Shi, Qiaofang ^{[1
]}

Diao, Guowang ^{[1
]}

Chen, Ming ^{[1
]}

机构：

[1] School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou,225002, China

来源：

Journal of Alloys and Compounds | 2022年 / 897卷

关键词：

Potassium hydroxide;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The exploitation of highly active, stable and inexpensive electrocatalysts with abundant elements of earth is the key to hydrogen production through water electrolysis. Herein, the precursors (cobalt-iron glycerate composites, CoxFeyG@F127 with different Co/Fe ratios) were prepared with the influence of polymeric surfactant Pluronic F127 by a hydrothermal process. The CoxFeyG@F127 were transformed into CoxFey alloy with a little of carbon (CoxFey-C) after calcination treatment. In these catalysts, the Co5Fe5-C nanospheres constructed with small nanoparticles can give full play to the synergistic effect of Co and Fe atoms, and significantly improve the catalytic activity. In 1.0 M KOH, the Co5Fe5-C electrocatalyst required a low overpotential of 245 mV for the oxygen evolution reaction (OER) and 165 mV for the hydrogen evolution reaction (HER) to achieve 10 mA cm−2, respectively. Based on the excellent catalytic performance for HER/OER, the bifunctional electrocatalyst of Co5Fe5-C were assembled into an alkaline electrolyzer, which can drive a current density of 10 mA cm−2 at 1.46 V and show outstanding performance for overall water splitting. © 2021 Elsevier B.V.

引用