A Highly Efficient, Clean‐Surface, Porous Platinum Electrocatalyst and the Inhibition Effect of Surfactants on Catalytic Activity. Issue 1 (30th November 2012)

• Record Type: Journal Article
• Authors: Wang, Shaozhen; Kuai, Long; Huang, Yucheng; Yu, Xue; Liu, Yadong; Li, Wenzheng; Chen, Lu; Geng, Baoyou
• Is Part Of: Chemistry. Volume 19:Issue 1(2013)
• Page Start: 240
• Page End: 248
• Publication Date: 2012-11-30
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201203398
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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, cetyltrimethylammonium 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.</p> </abstract>