NiMn-Based Bimetal-Organic Framework Nanosheets Supported on Multi-Channel Carbon Fibers for Efficient Oxygen Electrocatalysis

被引：279

作者：

Cheng, Weiren ^{[1
]}

Lu, Xue Feng ^{[1
]}

Luan, Deyan ^{[1
]}

Lou, Xiong Wen ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 41期

基金：

新加坡国家研究基金会;

关键词：

electrocatalysis; MOFs; multi-channel carbon fiber; OER; ORR; REDUCTION; EVOLUTION; HYDROXIDE;

D O I：

10.1002/anie.202008129

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Developing noble-metal-free bifunctional oxygen electrocatalysts is of great significance for energy conversion and storage systems. Herein, we have developed a transformation method for growing NiMn-based bimetal-organic framework (NiMn-MOF) nanosheets on multi-channel carbon fibers (MCCF) as a bifunctional oxygen electrocatalyst. Owing to the desired components and architecture, the MCCF/NiMn-MOFs manifest comparable electrocatalytic performance towards oxygen reduction reaction (ORR) with the commercial Pt/C electrocatalyst and superior performance towards oxygen evolution reaction (OER) to the benchmark RuO(2)electrocatalyst. X-ray absorption fine structure (XAFS) spectroscopy and density functional theory (DFT) calculations reveal that the strong synergetic effect of adjacent Ni and Mn nodes within MCCF/NiMn-MOFs effectively promotes the thermodynamic formation of key *O and *OOH intermediates over active NiO(6)centers towards fast ORR and OER kinetics.

引用

页码：18234 / 18239

页数：6

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