In:
ChemSusChem, Wiley, Vol. 11, No. 19 ( 2018-10-11), p. 3524-3533
Abstract:
Photocatalytic conversion of CO 2 into CH 4 represents an appealing approach to alleviate the world's continued reliance on fossil fuels and global warming resulting from increasing CO 2 concentrations in the atmosphere. However, its practical application is greatly limited by serious electron–hole recombination in the photocatalysts and the production of CO and H 2 as side reactions. Herein, for the first time, it is demonstrated that the photocatalytic reduction of CO 2 to CH 4 can be significantly improved through the simultaneous alloying and hydriding of metal cocatalysts. The isolation of Cu and H atoms in Pd lattices play three roles in the enhancement of CO 2 to CH 4 conversion: 1) Cu atoms provide catalytic sites to reduce CO 2 into CO and then to CH 4 to suppress H 2 evolution; 2) H atoms improve the electron‐trapping ability of cocatalysts; and 3) H atoms accelerate the reduction of CO to CH 4 , which is the rate‐limiting procedure in the conversion of CO 2 into CH 4 . Arising from the synergistic interplay between Pd−H and Cu−CO sites, C 3 N 4 −Pd 9 Cu 1 H x (15 mg) achieves 100 % selectivity for CH 4 production with an average rate of 0.018 μmol h −1 under visible‐light irradiation. This work provides insights into the design of a cocatalyst for highly selective CO 2 conversion through lattice engineering at atomic precision.
Type of Medium:
Online Resource
ISSN:
1864-5631
,
1864-564X
DOI:
10.1002/cssc.201801294
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
2411405-4
detail.hit.zdb_id:
2389988-8
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