title: A highly efficient, clean-surface, porous platinum electrocatalyst and the inhibition effect of surfactants on catalytic activity.
abstract: Herein we report a gentle seedless and surfactant-free method for the preparation of clean-surface porous platinum nanoparticles. In terms of electrocatalytic CH(3)OH 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.
authors.affiliation: College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu 241000, PR China.
authors.forename: Shaozhen
authors.initials: S
authors.lastname: Wang
authors.forename: Long
authors.initials: L
authors.lastname: Kuai
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Huang
authors.forename: Xue
authors.initials: X
authors.lastname: Yu
authors.forename: Yadong
authors.initials: Y
authors.lastname: Liu
authors.forename: Wenzheng
authors.initials: W
authors.lastname: Li
authors.forename: Lu
authors.initials: L
authors.lastname: Chen
authors.forename: Baoyou
authors.initials: B
authors.lastname: Geng
mesh_terms: D002384:Catalysis; D053768:Metal Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D013501:Surface-Active Agents; D010984:Platinum