Scalable preparation of Pd/bacteria-rGO(CNT, Ketjen) composites for efficient oxygen reduction catalyst

In this paper, Pd catalysts supported on novel composite carbon supports were synthesized by the carbonization and hydrogen reduction of Pd2+-doped bacteria containing Ketjen EC600JD, CNT and rGO, respectively. The analysis results show that the prepared catalysts exhibit excellent ORR electrocatalytic performance in acid medium. The best ORR electrocatalytic performance was obtained for Pd/carbonized-bacteria-rGO, which exbibits a mass activity at 0.345 A mg(-1) that is 9.58 times higher than commercial Pd/C, and mean-while displays a better stability than that of Pd/C. The enhanced performance can be attributed to nitrogen doping and flexible carbon-coating microstructure. Herein, we elaborate an efficient and ecofriendly method for the synthesis of electrocatalysts used for oxygen reduction reaction. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

This paper presents the synthesis of Pd catalysts supported on novel composite carbon supports through carbonization and hydrogen reduction, showing excellent ORR electrocatalytic performance. Pd/carbonized-bacteria-rGO exhibits the best catalytic performance with a mass activity 9.58 times higher than commercial Pd/C and better stability. The enhanced performance is attributed to nitrogen doping and flexible carbon-coating microstructure.