Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8147634 | Current Applied Physics | 2018 | 7 Pages |
Abstract
In this study, Pt-Pd nanoparticles (NPs) supported on few-layer graphene (FLG) have been firstly prepared by one-step arc discharge evaporation of carbon electrodes containing both Pt and Pd elements. The few-layer graphene and Pt-Pd nanoparticles were achieved simultaneously through the evaporation process. After a high-temperature hydrogen treatment, the Pt-Pd/graphene was applied in the study of methanol oxidation in direct methanol fuel cell. The total weight of electrocatalyst keeps 2â¯wt% of the electrode. The sample with a mass ratio of Pt:Pdâ¯=â¯3:1 (H-Pt3Pd1/G) exhibits better electrocatalytic activity (198â¯mAâ¯mg-1 pt) and better tolerance to carbon monoxide(CO) poisoning (If/Ibâ¯=â¯1.26). It is noteworthy that the value of If/Ib can reach to 1.55 for the sample with the mass ratio of Pt:Pdâ¯=â¯2:1 (H-Pt2Pd1/G),which implies its excellent ability of CO tolerance. The introduction of Pd element may open a new strategy to improve the CO tolerance by arc discharge evaporation.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Hongxia Wang, Leimei Sheng, Xinluo Zhao, Kang An, Zhongmin Ou, Yanghao Fang,