期刊
JOURNAL OF POWER SOURCES
卷 195, 期 18, 页码 5929-5933出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.03.009
关键词
Platinum; Anode catalysts; Electrodeposition; Formic acid oxidation; Fuel cells
资金
- Korea Evaluation Institute of Industrial Technology (KEIT) [20093020030020] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6A2402] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Electrodeposited Pt nanoparticles on carbon substrate show various morphologies depending on the applied potentials. Dendritic, pyramidal, cauliflower-like, and hemi-spherical morphologies of Pt are formed at potential ranges between -0.2 and 0.3V (vs. Ag/AgCl) and its particle sizes are distributed from 8 to 26 nm. Dendritic bulky particles over 20 nm are formed at an applied potential of -0.2V. while low deposition potential of 0.2V causes dense hemi-spherical structure of Pt less than 10 nm. The influence of different Pt shapes on an electrocatalytic oxidation of formic acid is represented. Consequently, homogeneous distribution of Pt nanoparticles with average particle of ca. 14 nm on carbon paper results in a high surface to volume ratio and the better power performance in a fuel cell application. (C) 2010 Published by Elsevier B.V.
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