Volume 19, Issue 40 2301473
Research Article

A Self-Templated Design Approach toward Multivariate Metal–Organic Frameworks for Enhanced Oxygen Evolution

Pengfei Dong

Pengfei Dong

State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 China

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Yuming Gu

Yuming Gu

Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 China

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Gehua Wen

Gehua Wen

State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 China

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Rengan Luo

Rengan Luo

State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 China

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Songsong Bao

Corresponding Author

Songsong Bao

State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 China

E-mail: [email protected]; [email protected]; [email protected]

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Jing Ma

Corresponding Author

Jing Ma

Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 China

E-mail: [email protected]; [email protected]; [email protected]

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Jianping Lei

Corresponding Author

Jianping Lei

State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 13 June 2023
Citations: 4

Abstract

Multivariate metal–organic framework (MOF) is an ideal electrocatalytic material due to the synergistic effect of multiple metal active sites. In this study, a series of ternary M-NiMOF (M = Co, Cu) through a simple self-templated strategy that the Co/Cu MOF isomorphically grows in situ on the surface of NiMOF is designed. Owing to the electron rearrange of adjacent metals, the ternary CoCu-NiMOFs demonstrate the improved intrinsic electrocatalytic activity. At optimized conditions, the ternary Co3Cu-Ni2MOFs nanosheets give the excellent oxygen evolution reaction (OER) performance of current density of 10 mA cm−2 at low overpotential of 288 mV with a Tafel slope of 87 mV dec−1, which is superior to that of bimetallic nanosheet and ternary microflowers. The low free energy change of potential-determining step identifies that the OER process is favorable at Cu–Co concerted sites along with strong synergistic effect of Ni nodes. Partially oxidized metal sites also reduce the electron density, thus accelerating the OER catalytic rate. The self-templated strategy provides a universal tool to design multivariate MOF electrocatalysts for highly efficient energy transduction.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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