Size-Dependent Activity of Palladium Nanoparticles for Oxygen Electroreduction in Alkaline Solutions
作者： L. Jiang , A. Hsu , D. Chu , R. Chen
DOI: 10.1149/1.3098478
关键词:
摘要: The objective of this study is to investigate the effect palladium particle size on catalytic activity for oxygen reduction reactions (ORRs) in alkaline solutions. Carbon-supported catalysts with average Pd sizes from 3 16.7 nm were obtained by treating a 20% Pd/C catalyst H 2 /N gas at elevated temperatures 300 600°C, respectively. specific ORRs, described kinetic ORR current (i k ) normalized active surface area, was found increase continuously factor about increased without reaching maximum. mass 1.3 when 5 and then decreased size. hydrogen peroxide yield negligible, especially mixed kinetic-diffusion controlled region, indicating that four-electron transfer path dominant
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