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Anchoring Single‐Atom Ru on CdS with Enhanced CO 2 Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO 2 Reduction to Solar Fuels
Author(s) -
Cai Songcai,
Zhang Meng,
Li Juanjuan,
Chen Jing,
Jia Hongpeng
Publication year - 2021
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.202000313
Subject(s) - selectivity , catalysis , photochemistry , photocatalysis , adsorption , atom (system on chip) , irradiation , materials science , chemistry , ruthenium , organic chemistry , physics , computer science , embedded system , nuclear physics
Using renewable solar energy to CO 2 conversion to chemical fuels has been widely perceived as an alternative solution for simultaneously tackling the energy crisis and the greenhouse effect. Herein, the selectivity of the photothermocataltytic CO 2 reduction with H 2 O vapor by single‐atom dispersed‐Ru loaded CdS is regulated. Under full solar spectrum irradiation, CO as the main product with 97.2% selectivity is observed on bare CdS, whereas the intentional introduction of optimized amount of Ru metal enables CO 2 reduction to CH 4 with 97.6% selectivity. A series of experiments and characterizations reveal that the single‐atom dispersed Ru serves as adsorption and active sites of CO 2 molecules as well as electron traps, resulting in great improvement in CO 2 uptake capability of the catalyst and the effective suppression in the recombination of photogenerated carriers. Moreover, the thermal effect synchronously induced by light has a positive influence on photocatalysis, which can prominently enhance the catalytic activity without altering the product selectivity.