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Radiolytic Approach for Efficient, Selective and Catalyst‐free CO 2 Conversion at Room Temperature
Author(s) -
Hu Changjiang,
Al Gharib Sarah,
Wang Yunlong,
Gan Pingping,
Li Qiuhao,
Denisov Sergey A.,
Le Caer Sophie,
Belloni Jacqueline,
Ma Jun,
Mostafavi Mehran
Publication year - 2021
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.202100378
Subject(s) - radical , formate , radiolysis , oxidizing agent , chemistry , oxalate , photochemistry , catalysis , salt (chemistry) , yield (engineering) , inorganic chemistry , organic chemistry , materials science , metallurgy
The present study proposes a new approach for direct CO 2 conversion using primary radicals from water irradiation. In order to ensure reduction of CO 2 into CO 2 −. by all the primary radiation‐induced water radicals, we use formate ions to scavenge simultaneously the parent oxidizing radicals H . and OH . producing the same transient CO 2 −. radicals. Conditions are optimized to obtain the highest conversion yield of CO 2 . The goal is achieved under mild conditions of room temperature, neutral pH and 1 atm of CO 2 pressure. All the available radicals are exploited for selectively converting CO 2 into oxalate that is accompanied by H 2 evolution. The mechanism presented accounts for the results and also sheds light on the data in the literature. The radiolytic approach is a mild and scalable route of direct CO 2 capture at the source in industry and the products, oxalate salt and H 2 , can be easily separated.