In:
Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 15, No. 2 ( 2022), p. 601-609
Abstract:
Single-atom catalysts are playing a pivotal-role in understanding atomic-level photocatalytic processes. However, single-atoms are typically non-uniformly distributed on photocatalyst surfaces, hindering the systematic investigation of structure–property correlation at atomic precision. Herein, by combining material design, spectroscopic analyses, and theoretical studies, we investigate the atomic-level CO 2 photoreduction process on TiO 2 photocatalysts with uniformly stabilized transition metal single-atoms. First, the electronic interaction between single Cu atoms and the surrounding TiO 2 affects the reducibility of the TiO 2 surface, leading to spontaneous O vacancy formation near Cu atoms. The coexistence of Cu atoms and O vacancies cooperatively stabilizes CO 2 intermediates on the TiO 2 surface. Second, our approach allows us to control the spatial distribution of uniform single Cu atoms on TiO 2 , and demonstrate that neighboring Cu atoms simultaneously engage in the interaction with CO 2 intermediates by controlling the charge localization. Optimized Cu 1 /TiO 2 photocatalysts exhibit 66-fold enhancement in CO 2 photoreduction performance compared to the pristine TiO 2 .
Type of Medium:
Online Resource
ISSN:
1754-5692
,
1754-5706
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2439879-2
detail.hit.zdb_id:
2448515-9
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