Oxygen reduction to hydrogen peroxide on oxidized nanocarbon: Identification and quantification of active sites

doi:10.1016/j.jcis.2020.04.030

CORC > 金属研究所 > 中国科学院金属研究所

	Oxygen reduction to hydrogen peroxide on oxidized nanocarbon: Identification and quantification of active sites
	Lu, Xingyu 2,3; Wang, Dan 2; Wu, Kuang-Hsu 2,4; Guo, Xiaoling 1; Qi, Wei 1,2
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2020-08-01
卷号	573 页码:376-383
关键词	Oxygen reduction reaction Two-electron pathway Carbon catalyst Active site Oxygen functionality
ISSN号	0021-9797
DOI	10.1016/j.jcis.2020.04.030
通讯作者	Qi, Wei(wqi@imr.ac.cn)
英文摘要	Two-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.
资助项目	National 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研究方向	Chemistry
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000533529500038
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138874]
专题	金属研究所_中国科学院金属研究所
通讯作者	Qi, Wei
作者单位	1.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
推荐引用方式 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.