Oxygen Vacancy Engineering on Pyrochlore Oxides Catalysts for Electrochemical Energy Storage and Conversion Systems

Feng，Qi1; Zou，Jiexin2; Zhao，Zhiliang2,3; Wang，Yajun2; Li，Hui1,3; Wang，Haijiang2,3

10.1149/09601.0211ecst

2020

1938-6737

1938-5862

ECS Transactions

96

1

211-218

We demonstrate that oxygen electrocatalysts can be synchronously applied in acid oxygen evolution reaction (OER), alkaline OER and oxygen evolution reaction (ORR). The oxygen electrocatalyst (Y1.85Ba0.15Ru2O7) optimized by oxygen vacancy modulation presents an extraordinary catalytic activity and stability. Y1.85Ba0.15Ru2O7catalyst presents an overpontential of 0.278 V in acid OER, which surpass most of the reported oxygen catalysts. Proton exchange membrane water electrolyzer (PEMWE) with Y1.85Ba0.15Ru2O7 anode attains 1.34 A cm-2 under a cell voltage of 1.7 V at 60 °C. Ba-doped Y2Ru2O7 shows an obvious advantage electrocatalytic activity than undoped Y2Ru2O7 in both OER and ORR process. This work paves a new avenue for developing active and robust oxygen electrocatalysts for both PEMWE and zinc-air battery applications.

第一

英语

EI

20203909244539

Proton exchange membrane fuel cells (PEMFC) ; Oxygen vacancies ; Ruthenium compounds ; Zinc air batteries ; Catalyst activity

Secondary Batteries:702.1.2 ; Fuel Cells:702.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Crystalline Solids:933.1

2-s2.0-85091418475

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen, Guangdong,518055,China
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Shenzhen Clean Energy Research Institute,Shenzhen, Guangdong,518055,China

Feng，Qi,Zou，Jiexin,Zhao，Zhiliang,et al. Oxygen Vacancy Engineering on Pyrochlore Oxides Catalysts for Electrochemical Energy Storage and Conversion Systems[C],2020:211-218.