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Concentrated solar CO 2 reduction in H 2 O vapour with >1% energy conversion efficiency.
- Source :
-
Nature communications [Nat Commun] 2024 Jun 01; Vol. 15 (1), pp. 4675. Date of Electronic Publication: 2024 Jun 01. - 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.<br /> (© 2024. The Author(s).)
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 15
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 38824139
- Full Text :
- https://doi.org/10.1038/s41467-024-49003-8