In:
Small, Wiley, Vol. 17, No. 20 ( 2021-05)
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 CO 2 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 CO 2 reduction reaction (CO 2 RR). This work therefore suggests some new insight for the design of efficient electrocatalysts for CO 2 RR.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202100762
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2168935-0
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