The Role of Ru in Improving the Activity of Pd toward Hydrogen Evolution and Oxidation Reactions in Alkaline Solutions

Qin, Xueping1; Zhang, Lulu1; Xu, Gui-Liang2; Zhu, Shangqian1; Wang, Qi3; Gu, Meng3; Zhang, Xiaoyi4; Sun, Chengjun4; Balbuena, Perla B.5; Amine, Khalil2,6,7; Shao, Minhua1

2019-10

10.1021/acscatal.9b01744

ACS Catalysis   影响因子和分区

2155-5435

Improving the reaction kinetics of hydrogen evolution and oxidation reactions (HER/HOR) in alkaline media is critical to promote the development of alkaline fuel cells and electrolyzers. Here, we prepared Pd3Ru alloy nanocatalysts with Ru segregated on the surfaces, forming adatoms and clusters. This structure dramatically lowered the overpotential of Pd toward HER in 1 M KOH by 104 mV at 10 mA cm(-2). The HER activity was even higher than that of Pt (6 mV improvement at 10 mA cm(-2)). Theoretical simulation results revealed that Ru adatoms/clusters on the surface could weaken the hydrogen-binding energy and promote the OH adsorption, consequently lowering the reaction barrier of the rate-determining step in HER. Our findings are of significance for clarifying the role of Ru in bimetallic catalysts and rational design of more active catalysts for HER/HOR.

alkaline fuel cell hydrogen evolution reaction hydrogen oxidation reaction palladium ruthenium density functional theory calculations

SCI ; EI

英语

其他

U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences[DE-AC02-06CH11357]

Chemistry

Chemistry, Physical

WOS:000489204000087

AMER CHEMICAL SOC

20194107512591

Adatoms ; Alkaline fuel cells ; Binary alloys ; Binding energy ; Nanocatalysts ; Oxidation ; Palladium ; Potassium hydroxide ; Reaction kinetics ; Ruthenium

Precious Metals:547.1 ; Fuel Cells:702.2 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Probability Theory:922.1

Web of Science

1.Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
2.Argonne Natl Lab, Chem Sci & Engn Div, 9700 South Cass Ave, Lemont, IL 60439 USA
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Argonne Natl Lab, Xray Sci Div, Adv Photon Source, 9700 South Cass Ave, Argonne, IL 60439 USA
5.Texas A&M Univ, Coll Stn, Artie McFerrin Dept Chem Engn, College Stn, TX 77843 USA
6.Stanford Univ, Mat Sci & Engn, Stanford, CA 94305 USA
7.Imam Abdulrahman Bin Faisal Univ IAU, IRMC, Dammam 34212, Saudi Arabia

Qin, Xueping,Zhang, Lulu,Xu, Gui-Liang,et al. The Role of Ru in Improving the Activity of Pd toward Hydrogen Evolution and Oxidation Reactions in Alkaline Solutions[J]. ACS Catalysis,2019,9(10):9614-9621.

Qin, Xueping.,Zhang, Lulu.,Xu, Gui-Liang.,Zhu, Shangqian.,Wang, Qi.,...&Shao, Minhua.(2019).The Role of Ru in Improving the Activity of Pd toward Hydrogen Evolution and Oxidation Reactions in Alkaline Solutions.ACS Catalysis,9(10),9614-9621.

Qin, Xueping,et al."The Role of Ru in Improving the Activity of Pd toward Hydrogen Evolution and Oxidation Reactions in Alkaline Solutions".ACS Catalysis 9.10(2019):9614-9621.