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; Wang, Dan; Wu, Kuang-Hsu; Guo, Xiaoling; Qi, Wei
	2020-08-01
Source Publication	JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume	573 Pages:376-383
Abstract	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.
DOI	10.1016/j.jcis.2020.04.030
WOS ID	WOS:000533529500038
Citation statistics	Cited Times:5[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/82673
Collection	中国科学院金属研究所
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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