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Concentrated solar CO2 reduction in H2O vapour with >1% energy conversion efficiency.
- Source :
- Nature Communications; 6/1/2024, Vol. 15 Issue 1, p1-12, 12p
- Publication Year :
- 2024
-
Abstract
- H<subscript>2</subscript>O dissociation plays a crucial role in solar-driven catalytic CO<subscript>2</subscript> methanation, demanding high temperature even for solar-to-chemical conversion efficiencies <1% with modest product selectivity. Herein, we report an oxygen-vacancy (V<subscript>o</subscript>) rich CeO<subscript>2</subscript> catalyst with single-atom Ni anchored around its surface V<subscript>o</subscript> sites by replacing Ce atoms to promote H<subscript>2</subscript>O dissociation and achieve effective photothermal CO<subscript>2</subscript> reduction under concentrated light irradiation. The high photon flux reduces the apparent activation energy for CH<subscript>4</subscript> production and prevents V<subscript>o</subscript> from depletion. The defects coordinated with single-atom Ni, significantly promote the capture of charges and local phonons at the Ni d-impurity orbitals, thereby inducing more effective H<subscript>2</subscript>O activation. The catalyst presents a CH<subscript>4</subscript> yield of 192.75 µmol/cm<superscript>2</superscript>/h, with a solar-to-chemical efficiency of 1.14% and a selectivity ~100%. The mechanistic insights uncovered in this study should help further the development of H<subscript>2</subscript>O-activating catalysts for CO<subscript>2</subscript> reduction and thereby expedite the practical utilization of solar-to-chemical technologies. This work reports a single-atom Ni incorporated CeO<subscript>2</subscript> catalyst that boosts the efficiency of solar CO<subscript>2</subscript> reduction under concentrated light irradiation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 15
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 177597206
- Full Text :
- https://doi.org/10.1038/s41467-024-49003-8