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Bismuth clusters pinned on TiO2 porous nanowires boosting charge transfer for CO2 photoreduction to CH4.
- Source :
- Nano Research; Mar2024, Vol. 17 Issue 3, p1190-1198, 9p
- Publication Year :
- 2024
-
Abstract
- Artificial photosynthesis in carbon dioxide (CO<subscript>2</subscript>) conversion into value-added chemicals attracts considerable attention but suffers from the low activity induced by sluggish separation of photogenerated carriers and the kinetic bottleneck-induced unsatisfied selectivity. Herein, we prepare a new-style Bi/TiO<subscript>2</subscript> catalyst formed by pinning bismuth clusters on TiO<subscript>2</subscript> nanowires through being confined by pores, which exhibits high activity and selectivity towards photocatalytic production of CH<subscript>4</subscript> from CO<subscript>2</subscript>. Boosted charge transfer from TiO<subscript>2</subscript> through Bi to the reactants is revealed via in situ X-ray photon spectroscopy and time-resolved photoluminescence (PL). Further, in situ Fourier transform infrared results confirm that Bi/TiO<subscript>2</subscript> not only overcomes the multi-electron kinetics challenge of CO<subscript>2</subscript> to CH<subscript>4</subscript> via boosting charge transfer, but also facilitates proton production and transfer as well as the intermediates <superscript>⋆</superscript>CHO and <superscript>⋆</superscript>CH<subscript>3</subscript>O generation, ultimately achieving the tandem catalysis towards methanation. Theoretical calculation also underlies that the more favorable reaction step from <superscript>⋆</superscript>CO to <superscript>⋆</superscript>CHO on Bi/TiO<subscript>2</subscript> results in CH<subscript>4</subscript> production with higher selectivity. Our work brings new insights into rational design of photocatalysts with high performance and the formation mechanism of CO<subscript>2</subscript> to CH<subscript>4</subscript> for solar energy storage in future. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19980124
- Volume :
- 17
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Nano Research
- Publication Type :
- Academic Journal
- Accession number :
- 175695868
- Full Text :
- https://doi.org/10.1007/s12274-023-5990-6