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Oxygen reduction to hydrogen peroxide on oxidized nanocarbon: Identification and quantification of active sites
Lu, Xingyu2,3; Wang, Dan2; Wu, Kuang-Hsu2,4; Guo, Xiaoling1; Qi, Wei1,2
Corresponding AuthorQi, Wei(wqi@imr.ac.cn)
2020-08-01
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume573Pages:376-383
AbstractTwo-electron electrochemical oxygen reduction reaction (ORR) on non-metallic nanocarbon catalysts yielding hydrogen peroxide (H2O2) has attracted considerable research attentions in the field of electrochemistry, catalysis and material science. Here, oxidized carbon black (OCB) with different amounts of surface oxygen functional groups were synthesized for ORR. OCB catalysts exhibited a significant activity improvement for the two-electron pathway comparing with non-oxidized ones. Identification and quantification of active sites for two-electron pathway of ORR process were further realized via linking the activity to structural compositions of OCB, and both carboxyl (-COOH) and carbonyl (-C=O) groups were proved responsible for two-electron pathway ORR to produce H2O2.The intrinsic activity of -COOH (k.(COOH) = 1.34 x 10(7) mol(1)) was found higher than that of -C=O (k(-c=o) = 0.25 x 10(7) mol(1)). The present work provides new physical-chemical insights on the mechanism of oxygen reduction reactions on carbon-based catalysts, paving the way for the establishment of structure-function relations and further development of novel non-metallic catalytic systems. (C) 2020 Elsevier Inc. All rights reserved.
KeywordOxygen reduction reaction Two-electron pathway Carbon catalyst Active site Oxygen functionality
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS
DOI10.1016/j.jcis.2020.04.030
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[21761132010] ; National Natural Science Foundation of China[91645114] ; National Natural Science Foundation of China[21573256] ; Youth Innovation Promotion Association, CAS
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000533529500038
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138875
Collection中国科学院金属研究所
Corresponding AuthorQi, Wei
Affiliation1.Ludong Univ, Sch Chem & Mat Sci, Yantai, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Liaoning, Peoples R China
3.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215123, Peoples R China
4.Univ New South Wales, Sch Chem Engn, Kensington, NSW 2052, Australia
Recommended Citation
GB/T 7714
Lu, Xingyu,Wang, Dan,Wu, Kuang-Hsu,et al. Oxygen reduction to hydrogen peroxide on oxidized nanocarbon: Identification and quantification of active sites[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2020,573:376-383.
APA Lu, Xingyu,Wang, Dan,Wu, Kuang-Hsu,Guo, Xiaoling,&Qi, Wei.(2020).Oxygen reduction to hydrogen peroxide on oxidized nanocarbon: Identification and quantification of active sites.JOURNAL OF COLLOID AND INTERFACE SCIENCE,573,376-383.
MLA Lu, Xingyu,et al."Oxygen reduction to hydrogen peroxide on oxidized nanocarbon: Identification and quantification of active sites".JOURNAL OF COLLOID AND INTERFACE SCIENCE 573(2020):376-383.
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