Bioinspired NiFe-gallate metal-organic frameworks for highly efficient oxygen evolution electrocatalysis

被引：17

作者：

Fang, Min ^{[1
]}

Gao, Xutao ^{[2
]}

Liang, Jing ^{[1
]}

Guo, Biao ^{[1
]}

Zou, Lie ^{[1
]}

Lu, Jun ^{[1
]}

Gao, Yan ^{[1
]}

Tse, Edmund C. M. ^{[2
]}

Liu, Jinxuan ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China

[2] Univ Hong Kong, Dept Chem, CAS HKU Joint Lab New Mat, Hong Kong, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2022年 / 10卷 / 13期

基金：

中国国家自然科学基金;

关键词：

ACTIVE-SITES; HEMATITE;

D O I：

10.1039/d2ta01293f

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：

We report the synthesis of a bioinspired NiFe-gallate metal-organic framework on carbon paper using gallic acid (GA) as the organic ligand, nickel chloride hexahydrate and iron(ii) chloride tetrahydrate as metal sources by a one-step hydrothermal method. The as-prepared NiFe-GA on carbon paper exhibits excellent oxygen evolution reaction (OER) performance, which requires overpotentials of 185 mV and 236 mV to achieve 10 mA cm(-2) and 100 mA cm(-2) in 1.0 M KOH, respectively. In situ electrochemical and density functional theory calculation results reveal that the presence of Fe and GA favors the generation of active oxygen species and the catalytic active Ni- and Fe-sites facilitate the charge transport to adsorbed OHad reducing the activation barrier of OHad deprotonation to form O-ad intermediates, thereby contributing the superior OER performance.

引用

页码：7013 / 7019

页数：7

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