Ultra-Rapid Electrocatalytic H<sub>2</sub>O<sub>2</sub> Fabrication over Mono-Species and High-Density Polypyrrolic-N Sites

doi:10.1002/smll.202403261

IMR OpenIR

	Ultra-Rapid Electrocatalytic H₂O₂ Fabrication over Mono-Species and High-Density Polypyrrolic-N Sites
	Peng, Wei 1; Chen, Rui 1; Liu, Xiaoqing 1; Tan, Haotian 1; Yin, Lichang 2; Hou, Feng 1; Yang, De'an 1; Liang, Ji 1
通讯作者	Yin, Lichang(lcyin@imr.ac.cn) ; Hou, Feng(houf@tju.edu.cn) ; Yang, De'an(dayang@tju.edu.cn) ; Liang, Ji(liangji@tju.edu.cn)
	2024-06-21
发表期刊	SMALL
ISSN	1613-6810
页码	9
摘要	Electrocatalytic hydrogen peroxide (H2O2) production via two-electron oxygen reduction reaction (2e(-)-ORR) features energy-saving and eco-friendly characteristics, making it a promising alternative to the anthraquinone oxidation process. However, the common existence of numerous 2e(-)-ORR-inactive sites/species on electrocatalysts tends to catalyze side reactions, especially under low potentials, which compromises energy efficiency and limits H2O2 yield. Addressing this, a high surface density of mono-species pyrrolic nitrogen configurations is formed over a polypyrrole@carbon nanotube composite. Thermodynamic and kinetic calculation and experimental investigation collaboratively confirm that these densely distributed and highly selective active sites effectively promote high-rate 2e(-)-ORR electrocatalysis and inhibit side reactions over a wide potential range. Consequently, an ultra-high and stable H2O2 yield of up to 67.9/51.2 mol g(-1) h(-1) has been achieved on this material at a current density of 200/120 mA cm(-1), corresponding Faradaic efficiency of 72.8/91.5%. A maximum H2O2 concentration of 13.47 g L-1 can be accumulated at a current density of 80 mA cm(-1) with satisfactory stability. The strategy of surface active site densification thus provides a promising and universal avenue toward designing highly active and efficient electrocatalysts for 2e(-)-ORR as well as a series of other similar electrochemical processes.
关键词	electrocatalysts high-density hydrogen peroxide mono-species polypyrrole
资助者	National Natural Science Foundation of China ; Tianjin University International Education Program for Outstanding Doctoral Thesis
DOI	10.1002/smll.202403261
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China ; Tianjin University International Education Program for Outstanding Doctoral Thesis[C2-2021-004] ; [22379111] ; [22179093]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001252058700001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：1[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/321006/187249
专题	中国科学院金属研究所
通讯作者	Yin, Lichang; Hou, Feng; Yang, De'an; Liang, Ji
作者单位	1.Tianjin Univ, Sch Mat Sci & Engn, Key Lab Adv Ceram & Machining Technol, Minist Educ, Tianjin 300072, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Peng, Wei,Chen, Rui,Liu, Xiaoqing,et al. Ultra-Rapid Electrocatalytic H₂O₂ Fabrication over Mono-Species and High-Density Polypyrrolic-N Sites[J]. SMALL,2024:9.
APA	Peng, Wei.,Chen, Rui.,Liu, Xiaoqing.,Tan, Haotian.,Yin, Lichang.,...&Liang, Ji.(2024).Ultra-Rapid Electrocatalytic H₂O₂ Fabrication over Mono-Species and High-Density Polypyrrolic-N Sites.SMALL,9.
MLA	Peng, Wei,et al."Ultra-Rapid Electrocatalytic H₂O₂ Fabrication over Mono-Species and High-Density Polypyrrolic-N Sites".SMALL (2024):9.