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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
Effects of Reduction Methods on the Performance of Shewanella oneidensis MR-1 Palladium/Carbon Catalyst for Oxygen
Xiaoting Deng1, Min Lao1, Jingwen Huang2
1College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China.
Abstract:
The influence of the reduction method on the morphology and performance of the catalyst still controversial. In this study, hydrogen, Shewanella oneidensis MR-1 (MR-1), MR-1 and hydrogen coreduction are used to reduce the palladium ions adsorbed by MR-1 to obtain Pd/CH, Pd/CM, and Pd/CH catalyst, respectively. It is found that the palladium nanoparticles (Pd NPs) in Pd/CH are the largest, while the Pd NPs in Pd/CM are the smallest. This is due to the reduction of Pd NPs in Pd/CH under anaerobic conditions to form smaller Pd NPs that will further aggregate and grow in H2. In addition, Pd/CM exhibited the best catalytic performance with a mass activity of 0.31 A mg-1, better than that of Pd/CH (0.06 A mg-1) and Pd/CH (0.13 A mg-1). This study provides a meaningful reference for the selection of reduction methods in metal catalysts.
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