Oxygen vacancy engineering of yttrium ruthenate pyrochlores as an efficient oxygen catalyst for both proton exchange membrane water electrolyzers and rechargeable zinc-air batteries

Feng，Qi1,2; Zhao，Zhiliang2,3; Yuan，Xiao Zi5; Li，Hui2,3; Wang，Haijiang3,4

2020

10.1016/j.apcatb.2019.118176

APPLIED CATALYSIS B-ENVIRONMENTAL   影响因子和分区

0926-3373

1873-3883

We for the first time demonstrate that oxygen electrocatalysts can be synchronously applied and stably operated in both proton exchange membrane water electrolyzers (PEMWE) and zinc-air batteries (ZAB) devices. The electrocatalyst (YCaRuO) optimized by oxygen vacancy engineering demonstrates superior electrocatalytic activity and durability for both oxygen evolution reaction and oxygen reduction reaction. For PEMWE, it achieves 1.25 A cm under a cell voltage of 1.7 V at 60 °C and operates stably for more than 1000 min at 60 °C. For ZAB, YCaRuO operates stably over 6400 min and degrades only slightly. Our results reveal that partial Ca replacement of Y in YRuO promotes the hole doping effect, and thus enhances the oxygen vacancy concentration and hybrid valence of Ru/Ru, which are strongly associated with the electrochemical performance of oxygen electrocatalysts. This work paves a new avenue for developing active and robust oxygen electrocatalysts for both PEMWE and ZAB.

Oxygen evolution reaction Oxygen vacancy Proton exchange membrane water electrolyzer Pyrochlore oxides Zinc air battery

SCI ; EI

英语

通讯

Shenzhen Key Laboratory project[ZDSYS201603311013489]

Chemistry ; Engineering

Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical

WOS:000496894300031

ELSEVIER

20193807453113

Calcium compounds ; Electrocatalysts ; Electrolysis ; Electrolytic cells ; Electrolytic reduction ; Hole concentration ; Oxygen ; Ruthenium compounds ; Yttrium ; Zinc ; Zinc air batteries

Ore Treatment:533.1 ; Zinc and Alloys:546.3 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electrochemistry:801.4.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Crystalline Solids:933.1

CHEMISTRY

2-s2.0-85072303897

Scopus

1.School of Materials Science and EngineeringHarbin Institute of Technology,Harbin,150001,China
2.Department of Materials Science and EngineeringShenzhen Key Laboratory of Hydrogen EnergySouthern University of Science and Technology,Shenzhen,518055,China
3.Guangdong Provincial Key Laboratory of Energy Materials for Electric Power,Shenzhen,518055,China
4.Department of Mechanical and Energy EngineeringSouthern University of Science and Technology,Shenzhen,518055,China
5.Research Center of EnergyMining and EnvironmentNational Research Council Canada,4250 Wesbrook Mall,V6T1W5,Canada

Feng，Qi,Zhao，Zhiliang,Yuan，Xiao Zi,et al. Oxygen vacancy engineering of yttrium ruthenate pyrochlores as an efficient oxygen catalyst for both proton exchange membrane water electrolyzers and rechargeable zinc-air batteries[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,260.

Feng，Qi,Zhao，Zhiliang,Yuan，Xiao Zi,Li，Hui,&Wang，Haijiang.(2020).Oxygen vacancy engineering of yttrium ruthenate pyrochlores as an efficient oxygen catalyst for both proton exchange membrane water electrolyzers and rechargeable zinc-air batteries.APPLIED CATALYSIS B-ENVIRONMENTAL,260.

Feng，Qi,et al."Oxygen vacancy engineering of yttrium ruthenate pyrochlores as an efficient oxygen catalyst for both proton exchange membrane water electrolyzers and rechargeable zinc-air batteries".APPLIED CATALYSIS B-ENVIRONMENTAL 260(2020).