In situ growth of volcano-like FeIr alloy on nickel foam as efficient bifunctional catalyst for overall water splitting at high current density

被引：59

作者：

Chen, Jinli ^{[1
]}

Wang, Yamei ^{[1
]}

Qian, Guangfu ^{[1
]}

Yu, Tianqi ^{[1
]}

Wang, Zhenglin ^{[1
]}

Luo, Lin ^{[1
]}

Shen, Fang ^{[1
]}

Yin, Shibin ^{[1
]}

机构：

[1] Guangxi Univ, Coll Chem & Chem Engn,Sch Phys Sci & Technol, State Key Lab Proc Nonferrous Met & Featured Mat, MOE Key Lab New Proc Technol Nonferrous Met & Mat, 100 Daxue Rd, Nanning 530004, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 421卷

基金：

中国国家自然科学基金;

关键词：

Iridium-iron alloy; Volcano-like structure; Catalyst; Overall water splitting; High current density; OXYGEN EVOLUTION; NANOWIRE ARRAYS; NI FOAM; ELECTROCATALYST; NANOPARTICLES; FILMS; IRO2; NANOSHEETS; HYDROXIDE; NANORODS;

D O I：

10.1016/j.cej.2021.129892

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Developing active and durable catalysts for water splitting is challenging, especially at high current density. Herein, unique volcano-like FeIr alloy self-supported on nickel foam (NF) is prepared by hydrothermal process. It only needs overpotentials of 220.0 and 25.6 mV for oxygen and hydrogen evolution reaction (OER, HER) at +/- 10 mA cm(-2) in 1.0 M KOH, and both of them can keep for 124 h at +/- 1,000 mA cm(-2). For overall water splitting, 1.51 and 1.75 V are needed to reach 10 and 500 mA cm(-2), and it can work at 500 mA cm(-2) for 100 h in 30 wt% KOH solution at 60 degrees C. This can be due to the self-supporting volcano-like FeIr alloy structure, which can enhance the HER/OER intrinsic activity, and it is good for bubbles release to improve the stability. Thus, this work provides a strategy for developing efficient catalyst towards water splitting.

引用

页数：8

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