Highly Dispersed Ruthenium-Based Multifunctional Electrocatalyst

doi:10.1021/acscatal.9b03514

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Highly Dispersed Ruthenium-Based Multifunctional Electrocatalyst
	Bai, L ; Duan, ZY ; Wen, XD ; Si, R ; Zhang, QQ ; Guan, JQ
刊名	ACS CATALYSIS
	2019
卷号	9 期号:11 页码:9897-9904
关键词	OXYGEN REDUCTION REACTION WATER OXIDATION HYDROGEN EVOLUTION CATALYSTS EFFICIENT STABILITY DESIGN RU
ISSN号	2155-5435
DOI	10.1021/acscatal.9b03514
文献子类	期刊论文
英文摘要	A high-efficiency trifunctional electrocatalyst is required for practical applications of regenerative fuel cells, because the hydrogen evolution reaction (HER), oxygen reduction reaction (ORR), and oxygen evolution reaction (OER) are their core electrode reactions. However, implementation of both hydrogen and oxygen electrodes is hindered by low activity and poor stability of electrocatalysts for both water splitting and oxygen reduction. Herein, we report a high-temperature annealing strategy to fabricate a highly dispersed ruthenium-based catalyst embedded onto nitrogen-doped graphene (0.4-Ru@NG-750). The 0.4-Ru@NG-750 catalyst exhibits high trifunctional electrocatalytic activity and good stability in HER, ORR, and OER. The 0.4-Ru@NG-750 electrocatalyst exhibits a low overpotential of only 0.04 and 0.09 V at the current density of 10 mA.cm(-2) for HER in 1.0 M KOH and 0.5 M H2SO4, respectively, and 0.372 V for OER in 1.0 M KOH. Moreover, it shows a high half-wave potential of 0.826 and 0.723 V for ORR in 0.1 M KOH and 0.1 M HClO4, respectively. Structural characterizations show that RuN4Cx is one of the main structures in 0.4-Ru@NG-750. Density functional theory calculations indicate that the surface states of RuN4Cx sites evolve in different reaction conditions. In HER, ORR, and OER, the most stable states should be RuN4Cx, RuN4(OH)C-x, and RuN4(O)C-x, respectively, on which the theoretical overpotential is the lowest.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32083]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Jilin Univ, Coll Chem, Key Lab Surface & Interface Chem Jilin Prov, Changchun 130021, Jilin, Peoples R China; 2.Univ Texas Austin, Oden Inst Computat Engn & Sci, Austin, TX 78712 USA; 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Bai, L,Duan, ZY,Wen, XD,et al. Highly Dispersed Ruthenium-Based Multifunctional Electrocatalyst[J]. ACS CATALYSIS,2019,9(11):9897-9904.
APA	Bai, L,Duan, ZY,Wen, XD,Si, R,Zhang, QQ,&Guan, JQ.(2019).Highly Dispersed Ruthenium-Based Multifunctional Electrocatalyst.ACS CATALYSIS,9(11),9897-9904.
MLA	Bai, L,et al."Highly Dispersed Ruthenium-Based Multifunctional Electrocatalyst".ACS CATALYSIS 9.11(2019):9897-9904.