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Competitive adsorption on single-atom catalysts: Mechanistic insights into the aerobic oxidation of alcohols over Co-N-C
Huang, Kuntao; Fu, Hongquan; Shi, Wen; Wang, Hongjuan; Cao, Yonghai; Yang, Guangxing; Peng, Feng; Wang, Qiang; Liu, Zhigang; Zhang, Bingsen; Yu, Hao
2019-09-01
Source PublicationJOURNAL OF CATALYSIS
ISSN0021-9517
Volume377Pages:283-292
AbstractMe-N-C catalysts have received intensive scientific interest as non-noble-metal single-atom catalysts (SAC) for electrochemical- and thermocatalytic reactions. However, the lack of understanding of its properties hinders further improvement of the catalytic performance. An interesting issue is the molecular details of the reaction involving more than one reactant, since the activation of the second reactant is inevitably affected by the first one on SAC. Here, we synthesized Co-N-C SACs for the aerobic oxidation of benzyl alcohol (BA) to benzaldehyde. The catalyst exhibited excellent activity for this reaction, among the most active non-noble-metal catalysts. Differently from particulate metal or metal oxide catalysts, the Co-N-C SAC displayed "self-poisoning" due to the strong competitive adsorption of BA to O-2, as revealed by kinetics experiments and density functional theory calculations. Moreover, we rationalized the poisoning effect of polar moieties, including organic solvents and aqueous solutions, on the SAC. These results shed light on the catalytic behavior of aerobic oxidation of BA on the molecular level and enable the rational design of catalytic organic synthesis over Co-N-C SACs. (C) 2019 Elsevier Inc. All rights reserved.
KeywordCo-N-C Single-atom catalyst Benzyl alcohol oxidation Kinetics DFT calculation
Indexed BySCI
Language英语
WOS IDWOS:000491683200028
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80776
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Huang, Kuntao,Fu, Hongquan,Shi, Wen,et al. Competitive adsorption on single-atom catalysts: Mechanistic insights into the aerobic oxidation of alcohols over Co-N-C[J]. JOURNAL OF CATALYSIS,2019,377:283-292.
APA Huang, Kuntao.,Fu, Hongquan.,Shi, Wen.,Wang, Hongjuan.,Cao, Yonghai.,...&Yu, Hao.(2019).Competitive adsorption on single-atom catalysts: Mechanistic insights into the aerobic oxidation of alcohols over Co-N-C.JOURNAL OF CATALYSIS,377,283-292.
MLA Huang, Kuntao,et al."Competitive adsorption on single-atom catalysts: Mechanistic insights into the aerobic oxidation of alcohols over Co-N-C".JOURNAL OF CATALYSIS 377(2019):283-292.
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