(FeMnCe)-co-doped MOF-74 with significantly improved performance for overall water splitting

被引：11

作者：

Chai, Ning ^{[1
]}

Kong, Yuxuan ^{[1
]}

Liu, Tian ^{[1
]}

Ying, Shuanglu ^{[1
]}

Jiang, Qiao ^{[1
]}

Yi, Fei-Yan ^{[1
,2
]}

机构：

[1] Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China

[2] Key Lab Photoelect Detect Mat & Devices Zhejiang P, Ningbo 315211, Peoples R China

来源：

DALTON TRANSACTIONS | 2023年 / 52卷 / 33期

基金：

中国国家自然科学基金;

关键词：

METAL-ORGANIC FRAMEWORKS; BIFUNCTIONAL ELECTROCATALYSTS; HYDROGEN EVOLUTION; EFFICIENT; OXYGEN; STRATEGY;

D O I：

10.1039/d3dt01892j

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Developing inexpensive electrocatalysts with high activity and stability is of great value for overall water splitting. In this work, we designed a series of 3d-4f (FeMnCe)-trimetallic MOF-74 with different ratios of 3d- and 4f-metal centers. Among them, FeMn6Ce0.5-MOF-74/NF exhibited the best electrocatalytic performance for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in an alkaline solution. It only requires a low overpotential of 281 mV@100 mA cm(-2) for OER and 186 mV@-10 mA cm(-2) for HER in 1 M KOH. With FeMn6Ce0.5-MOF-74/NF as the anode and cathode in the overall water splitting system, only 1.65 V is needed to deliver a current density of 10 mA cm(-2). In particular, for the as-fabricated FeMn6Ce0.5-MOF-74/NF||Pt/C cell unit, only 1.40 V is needed to achieve 10 mA cm(-2). Therefore, the successful design of 3d-4f mixed-metallic MOF-74 provides a new viewpoint to develop highly efficient non-precious metal electrocatalysts.

引用

页码：11601 / 11610

页数：10

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