Effect of Amount of Nb/Ti Co-Doping on the Microstructure and Electrochemical Performance of SrCoO_3-δ-Based Perovskite

Abstract:

An increasing number of attention is being paid to perovskite oxides due to their relatively low prices and comparable ability in being an alternative choice to replace high-priced metal catalyst in many fields. In this work, a group of Ti/Nb co-doped SrCoO_3-δ-based perovskite oxides SrTi_xNb_0.2-xCo_0.8O_3-δ (x=0, 0.05, 0.1, 0.15, 0.175, 0.2) were synthesized and measured as candidates for oxygen evolution reaction (OER). Among all the perovskite samples, SrTi_xNb_0.2-xCo_0.8O_3-δ (x=0.175, STNC-4) displayed the lowest OER overpotential of 0.4 V and the lowest Tafel plots as well as fastest charge transfer ability. This catalyst also revealed a great durability in alkaline solution.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 876-883
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.876
• Online since: May 2020
• Authors: Hai Peng Deng, Li Nan Shu, Feng Li Liang*
• Keywords: Fuel Cell, Oxygen Evolution Reaction (OER), Perovskite Oxides, Stability

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