S-doped Ni(Fe)OOH bifunctional electrocatalysts for overall water splitting

被引：10

作者：

Li, Qi ^{[1
]}

Chen, Bingyu ^{[1
]}

Huang, Linghui ^{[1
]}

Zhu, Shuifeng ^{[1
]}

Qian, Yafeng ^{[1
]}

Wu, Dong ^{[1
,2
]}

Luo, Shiping ^{[1
]}

Xie, Aijuan ^{[1
]}

机构：

[1] Changzhou Univ, Sch Petrochem Engn, Changzhou 213164, Peoples R China

[2] Changzhou Univ, Hua Lookeng Honors Coll, Changzhou 213164, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 51卷

基金：

中国国家自然科学基金;

关键词：

Hydrogen evolution reaction; Oxygen evolution reaction; Nickel foam; Transition metal; Sulfide; OXYGEN EVOLUTION REACTION; METAL-ORGANIC FRAMEWORK; EFFICIENT; CATALYST; REDUCTION; STABILITY; OXIDES; FOAM;

D O I：

10.1016/j.ijhydene.2023.07.291

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A larger overpotential being needed to drive overall water splitting, the poor stability of electrode materials and high cost caused by the scarcity of noble metal electrocatalysts are still important factors for restricting electrochemical water splitting. Developing high-activity, low-cost electrocatalysts to enhance hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is a major challenge for overall water splitting. For this purpose, the S-Ni(Fe)OOH electrocatalyst was synthesized and used to perform HER and OER in 1.0 M KOH solution. The experimental results show that the overpotential of S-Ni(Fe)OOH is 22mV and 198 mV, and the Tafel slope is 93.21 mV dec(-1) and 17.50 mV dec(-1) for HER and OER respectively. Electrochemical impedance spectroscopy (EIS) also shows that S-Ni(Fe)OOH has smaller R-ct value of 2.71 Omega (HER) and 5.492 Omega (OER). The electrochemical active surface areas (ECSA) of S-Ni(Fe)OOH are 55.75 cm(2) (HER) and 85.75 cm(2) (OER), respectively. In addition, cyclic stability and chronoamperometry (i-t) tests prove that S-Ni(Fe)OOH catalyst has good stability with retention rates of 73.83% and 73.73% for HER and OER, respectively. In conclusion, the optimal S-Ni(Fe)OOH electrocatalyst exhibits a superior HER and OER activity, and can be used as a bifunctional electrocatalyst for the overall water splitting. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：1392 / 1406

页数：15

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