International Journal of Hydrogen Energy, Vol.44, No.52, 28134-28142, 2019
A non-noble metal oxide Ti2O3/rGO composite as efficient and highly stable electrocatalyst for oxygen reduction
Developing low-cost and high-performance non-precious metal catalysts for oxygen reduction reaction (ORR) is highly desirable. Herein, the Ti2O3/reduced graphene oxide (Ti2O3/rGO) composite was successfully prepared by solid state synthesis. The electrochemical experiments indicated that the Ti2O3/rGO composite presents an excellent electrocatalytic activity and high selectivity for ORR via a four - electron pathway. Moreover, this composite also has outstanding durability and superior methanol tolerance compared with a commercial Pt/C catalyst in the alkaline (0.1M KOH) media. The superior ORR performance of Ti2O3/rGO composite may be ascribed to the low valence Ti, and the synergetic chemical coupling effects between Ti2O3 and rGO. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.