Uniform Functionalization of High‐Quality Graphene with Platinum Nanoparticles for Electrocatalytic Water Reduction

ChemistryOpen

Raffaello Mazzaro²  Alessandro Boni²  Dr. Giovanni Valenti³  Prof. Massimo Marcaccio²  Prof. Francesco Paolucci²  Dr. Luca Ortolani⁴  Dr. Vittorio Morandi¹  Prof. Paola Ceroni² 

[1] E-mail address: E-mail address: 关键词: electrocatalysis;    graphene;    platinum nanoparticles;    water reduction;   

DOI  :  10.1002/open.201402151

来源: Wiley

【 摘 要 】

Abstract

Graphene–metal composites have potential as novel catalysts due to their unique electrical properties. Here, we report the synthesis of a composite material comprised of monodispersed platinum nanoparticles on high-quality graphene obtained by using two different exfoliation techniques. The material, prepared via an easy, low-cost and reproducible procedure, was evaluated as an electrocatalyst for the hydrogen evolution reaction. The turnover frequency at zero overpotential (TOF₀ in 0.1 m phosphate buffer, pH 6.8) was determined to be approximately 4600 h⁻¹. This remarkably high value is likely due to the optimal dispersion of the platinum nanoparticles on the graphene substrate, which enables the material to be loaded with only very small amounts of the noble metal (i.e., Pt) despite the very highly active surface. This study provides a new outlook on the design of novel materials for the development of robust and scalable water-splitting devices.

【 授权许可】

CC BY-NC-ND   
© 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.