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

doi:10.1016/j.jcis.2020.04.030

IMR OpenIR

	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
通讯作者	Qi, Wei(wqi@imr.ac.cn)
	2020-08-01
发表期刊	JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN	0021-9797
卷号	573 页码:376-383
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.
关键词	Oxygen reduction reaction Two-electron pathway Carbon catalyst Active site Oxygen functionality
资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS
DOI	10.1016/j.jcis.2020.04.030
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical
WOS记录号	WOS:000533529500038
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
引用统计	被引频次：94[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138875
专题	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.