Heterostructure of polyoxometalate/zinc-iron-oxide nanoplates as an outstanding bifunctional electrocatalyst for the hydrogen and oxygen evolution reaction

被引：39

作者：

Gautam, Jagadis ^{[1
,2
,3
]}

Kannan, Karthik ^{[1
]}

Meshesha, Mikiyas Mekete ^{[1
]}

Dahal, Bipeen ^{[4
]}

Subedi, Subhangi ^{[5
]}

Ni, Lubin ^{[2
]}

Wei, Yongge ^{[2
,3
]}

Yang, Bee Lyong ^{[1
]}

机构：

[1] Kumoh Natl Inst Technol, Sch Mat Sci & Engn, 61 Daehak Ro, Gumi Si 39177, Gyeongsangbuk D, South Korea

[2] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China

[3] Tsinghua Univ, Dept Chem, Minist Educ, Key Lab Organ Optoelectron & Mol Engn, Beijing 100084, Peoples R China

[4] Tribhuvan Univ, Cent Dept Chem, Kathmandu, Nepal

[5] Trichandra Multiple Campus, Dept Chem, Kathmandu, Nepal

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 618卷

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

Electrocatalyst; Zinc iron oxide; Polyoxometalates; Hydrogen evolution reaction; Oxygen evolution reaction; Overall water splitting; HIGHLY EFFICIENT; WATER OXIDATION; ENERGY-STORAGE; NICKEL; CARBON; NANOSHEETS; ARRAYS; HYBRIDS; PHOSPHIDE; ELECTRODE;

D O I：

10.1016/j.jcis.2022.03.103

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：

Electrocatalysts play an important role to increase the energy conversion efficiency of electrolysis processes. In this study, a heterostructure of zinc iron oxide (ZnFe2O4) and polyoxometalate (POM) nanoplates (POM-ZnFe2O4) was fabricated for the first time by a hydrothermal process. The hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) analysis of POM-ZnFe2O4 furnished low overpotentials of 268 and 356 mV, and 220 and 290 mV to achieve current densities of 20 and 50 mA cm(-2), respectively. In addition, an electrolytic cell composed of a POM-ZnFe2O4 cathode and anode required an operating voltage of 1.53 V to deliver a current of 10 mA cm(-2). The improved electrochemical performance of POM-ZnFe2O4 compared to commercial and recently reported catalysts is attributed to the high electrocatalytically active surface area, modulation in the electronic and chemical properties and the formation of heterojunction of ZnFe2O4 and POM, which are vital for accelerating HER and OER activity. (C) 2022 Elsevier Inc. All rights reserved.

引用

页码：419 / 430

页数：12

共 70 条

[1] Oxygen Evolution Reaction Electrocatalytic Improvement in POM@ZIF Nanocomposites: A Bidirectional Synergistic Effect [J].