A Highly Efficient, Clean-Surface, Porous Platinum Electrocatalyst and the Inhibition Effect of Surfactants on Catalytic Activity

作者：Wang, Shaozhen; Kuai, Long; Huang, Yucheng; Yu, Xue; Liu, Yadong; Li, Wenzheng; Chen, Lu; Geng, Baoyou^*

来源：Chemistry - A European Journal, 2013, 19(1): 240-248.

DOI：10.1002/chem.201203398

• catalyst inhibition
• nanostructures
• organocatalysis
• oxidation
• platinum
• surfactants

Herein we report a gentle seedless and surfactant-free method for the preparation of clean-surface porous platinum nanoparticles. In terms of electrocatalytic CH3OH oxidation, the clean-surface porous platinum exhibited better performance than platinum nanoparticles and a commercial Pt/C catalyst. The porous nanostructures exhibited 2.26-fold higher mass activity and 2.8-fold greater specific activity than the Pt/C catalyst. More importantly, three typical surfactants, cetyltrime-thylammonium bromide/chloride (CTAB/C), poly(vinylpyrrolidone), and sodium dodecyl sulfate, were chosen to study the inhibition effect of surfactants on electrocatalytic performance. It was observed that the surfactants led to a clear selective decrease in electrocatalytic performance. CTAB/C inhibited the catalytic activity the most due to the stronger interaction between the OH-enriched platinum surface and the positively charged molecules. Thus, this work indicates that these clean-surface porous platinum nanoparticles may be used as efficient catalysts for direct methanol fuel cells and provides a greater understanding of the inhibition effects of surfactants on catalytic activity.

• 出版日期2013-1
• 单位安徽师范大学