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Charge Transfer Reactions in CO 2 Electroreduction on Manganese Doped Ceria
Author(s) -
Huang Zhidong,
Shang Lei,
Qi Huiying,
Zhao Zhe,
Tu Baofeng,
Yang Weishen,
Cheng Mojie
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201801427
Subject(s) - manganese , electrochemistry , chemistry , doping , charge (physics) , inorganic chemistry , activation energy , carbon fibers , redox , carbon dioxide , electrode , materials science , organic chemistry , physics , optoelectronics , quantum mechanics , composite number , composite material
The key to electrochemical conversion of carbon dioxide (CO 2 ) into fuels lies in effient charge transfer reactions. Here, we depict from the polarzation resistance analysis that the electroreduction of CO 2 to CO on manganese doped ceria (CMO) passes through two elementary charge transfer reactions. One reaction is asscociated with( C O 3 ) O , S • •to( C O 3 ) O , S • and another associated with( C O 3 ) O , S • to CO. As the rate determing step, the first one has an apparenent acitvation energy of 178.7 kJ mol −1 and a pressure dependence ofP C O 20 . 76P C O 0 . 24. The second one has an apparent acitvation energy of 100.6 kJ mol −1 and a pressure dependence ofP C O 20 . 27P C O 0 . 73. Based on the experimental results, we give the kenetic expression for the CO 2 electroreduction rate on CMO.