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Affiliation of Author(s):化学与生命科学学院

Journal:Small

Funded by:国家自然科学基金项目

Abstract:In this work, by combining the superiority of polyoxometalates (POMs) and catalytic single-metal site Co of metalloporphyrin, a series of mixed-valence POM-based metal-organic frameworks (MOFs) composites is synthesized by a post-modification method. The electron-transfer property of POM@ PCN-222(Co) composite is significantly enhanced owing to the directional electron-transfer from POM to single-metal site Co in PCN-222(Co). In particular, H-POM@PCN-222(Co) gives a high Faradaic efficiency of 96.2% for electroreduction of CO2 into CO and good stability over 10 h. DFT calculations confirm that the directional electron transfer, which accelerates the multi-electron transfer from the electrode to active single-metal site Co, enriches the electron density of the Co center, and ultimately reduces the energy of the rate-determining step, thus increasing the catalytic activity of CO2 reduction reaction (CO2RR). This work therefore suggests some new insight for the design of efficient electrocatalysts for CO2RR.

Co-author:Ming-Liang Sun,Yi-Rong Wang

First Author:He Wenwen

Indexed by:Journal paper

Volume:17

Issue:20

Page Number:1

ISSN No.:1613-6810

Translation or Not:no

Date of Publication:2021-05-20

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