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Carbon aerogel supported Pt–Zn catalyst and its oxygen reduction catalytic performance in magnesium-air batteries

Published online by Cambridge University Press:  25 November 2014

Yun Zhang
Affiliation:
Shanghai Engineering Research Center of Magnesium Materials and Applications & National Engineering Research Center of Light Alloy NetForming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
Xiaomei Wu*
Affiliation:
Shanghai Engineering Research Center of Magnesium Materials and Applications & National Engineering Research Center of Light Alloy NetForming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
Yanbao Fu
Affiliation:
Environmental Energy Technologies Division, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
Weidian Shen
Affiliation:
Department of Physics and Astronomy, Eastern Michigan University, Ypsilanti, Michigan 48197, USA
Xiaoqin Zeng
Affiliation:
Shanghai Engineering Research Center of Magnesium Materials and Applications & National Engineering Research Center of Light Alloy NetForming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
Wenjiang Ding
Affiliation:
Shanghai Engineering Research Center of Magnesium Materials and Applications & National Engineering Research Center of Light Alloy NetForming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
*
a)Address all correspondence to this author. e-mail: wuxiaomei@sjtu.edu.cn
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Abstract

Our research aims at exploring a new oxygen reduction reaction (ORR) catalyst with effective catalytic capability, which can be used in the metal-air batteries. ORR electrocatalysts of carbon black and carbon aerogel supported Pt-based nanoparticles were synthesized by a chemical impregnation reduction method. The electrochemical measurement consisted of cyclic voltammetry (CV) and line scan of scanning electrochemical microscopy (SECM) conducted in alkaline medium as well as the single-cell tests. All the tests indicate that the Pt–Zn/carbon aerogel (Pt–Zn/CA) catalyst, with the specific discharge capacity reaching 1349.5 mA h g−1, exhibits the best catalytic performance among all the tested catalysts. The doping of Zn forms Pt-rich surface, creates more d-band vacancies, and reduces the leaching problem; the use of carbon aerogels brings larger specific surface area. These aspects have all improved the catalytic activity per unit mass.

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Articles
Copyright
Copyright © Materials Research Society 2014 

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References

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