Polypyrrole-wrapped Hofmann type metal-organic framework nanoflowers to boost oxygen evolution reaction

被引：0

作者：

Wu, Yuhang ^{[1
,2
]}

Li, Yuwen ^{[3
]}

Shen, Ling ^{[2
]}

Pan, Quanwen ^{[4
]}

Tao, Ye ^{[1
,2
]}

Gao, Junkuo ^{[5
]}

机构：

[1] Zhejiang Univ, Coll Comp Sci & Technol, Hangzhou, Zhejiang, Peoples R China

[2] Hangzhou City Univ, Dept Ind Design, Hangzhou, Zhejiang, Peoples R China

[3] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou, Zhejiang, Peoples R China

[4] Hangzhou City Univ, Cryogen Ctr, Hangzhou, Zhejiang, Peoples R China

[5] Zhejiang Sci Tech Univ, Sch Mat Sci & Engn, Hangzhou, Zhejiang, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2024年 / 332卷

基金：

中国国家自然科学基金;

关键词：

Oxygen evolution reaction; Metal -organic frameworks; Polypyrrole; Electrocatalysis; Nanoflowers; REDUCTION;

D O I：

10.1016/j.jssc.2024.124559

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The exploration of efficient and stable metal-organic frameworks (MOFs) for electrocatalytic oxygen evolution reaction (OER) has received increasing attention. However, the limited electronic conductivity of MOFs hinders the electron transfer rate. Herein, we report the preparation of conducting polypyrrole (PPy)-modified MOF nanoflowers (MOF-NFs@PPy) as promising electrocatalysts for OER. The PPy layer significantly increases the electrical conductivity and modulates the ionic transmittance between MOF-NFs and the electrolyte. The interaction of PPy with the MOF-NFs modifies the electronic structure and improves the reaction efficiency at the active sites. The obtained MOF-NFs@PPy exhibits excellent electrocatalytic activity with an OER overpotential of only 218 mV@10 mA cm(-2) and small Tafel slope of 47.4 mV dec(- 1). In addition, the MOF-NFs@PPy exhibited excellent long-term stability (>24 h). This work may provide a new idea and a novel construction strategy for MOFs to improve OER performance.

引用

页数：7

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