Construction of Co3O4/Fe2O3 nanosheets on nickel foam as efficient electrocatalyst for the oxygen evolution reaction

被引：35

作者：

Yang, Yuying ^{[1
]}

Zhu, Cuimei ^{[1
]}

Zhang, Yan ^{[1
]}

Xie, Yandong ^{[1
]}

Lv, Liwen ^{[1
]}

Chen, Wenlian ^{[1
]}

He, Yuanyuan ^{[1
]}

Hu, Zhongai ^{[1
]}

机构：

[1] Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Eco Environm Related Polymer Mat, Key Lab Polymer Mat Gansu Prov,Minist Educ, Lanzhou 730070, Gansu, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2021年 / 148卷 / 148期

基金：

中国国家自然科学基金;

关键词：

Oxygen evolution reaction; Co3O4; Fe2O3; Thin-wall cell structures; Transition-metal-based electrocatalysts; BIFUNCTIONAL ELECTROCATALYSTS; HETERONANORODS; NANOPARTICLES; ELECTRODES; VACANCIES; ARRAYS; SITES;

D O I：

10.1016/j.jpcs.2020.109680

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The development of earth-abundant and high-performance electrocatalysts for oxygen evolution reaction (OER) is a very important part for electrochemical water splitting to generate cleanliness and renewable hydrogen. The preparation of heterogeneous nanostructure composite is an effective method to further improve the performance of noble-metal-free catalysts. Herein, heterogeneous nanostructure of Co3O4/Fe2O3@NF electrocatalyst for OER was fabricated by a hydrothermal method and the subsequent oxidation process. The as-prepared Co3O4/Fe2O3@NF presents a unique thin-wall cell structure. Benefiting from the thin-wall cell structure and the synergistic effect between Co3O4 and Fe2O3, as well as the three-dimensionally (3D) conductive feature of the substrate of nickel foam (NF), the Co3O4/Fe2O3@NF electrode demonstrated excellent electrocatalytic activity for OER in alkaline solution. The overpotential is 254 mV at 10 mA cm(-2) current density, the Tafel slope is only 33 mV dec(-1), and the electrode also retained good stability of 24 h at the current density of 20 mA cm(-2). Compared with pristine Co3O4/Fe2O3 (eta(10) = 493 mV), Co3O4@NF = 350 mV) and Fe2O3@NF (eta(10) = 378 mV), the Co3O4/Fe2O3@NF electrode displayed obviously enhanced electrocatalytic performance.

引用

页数：7

共 46 条

[1] Bifunctional sulfur-doped cobalt phosphide electrocatalyst outperforms all-noble-metal electrocatalysts in alkaline electrolyzer for overall water splitting [J].