Carbon aerogel supported Pt-Zn catalyst and its oxygen reduction catalytic performance in magnesium-air batteries
Physics and Astronomy
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.
Link to Published Version
Zhang, Y., Wu, X., Fu, Y., Shen, W., Zeng, X., & Ding, W. (2014). Carbon aerogel supported Pt-Zn catalyst and its oxygen reduction catalytic performance in magnesium-air batteries. Journal of Materials Research, 29(23), 2863–2870. doi:10.1557/jmr.2014.343