Pt—Si Bifunctional Surfaces for CO and Methanol Electro-Oxidation

Autor:	Niels J. Bjerrum, Yang Shao-Horn, Jens Oluf Jensen, Binghong Han, Anastasia Aleksandrovna Permyakova
Rok vydání:	2015
Předmět:	Chemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis chemistry.chemical_compound General Energy Chemical engineering Bulk samples Energy transformation Organic chemistry Methanol Physical and Theoretical Chemistry Bifunctional Bimetallic strip
Zdroj:	The Journal of Physical Chemistry C. 119:8023-8031
ISSN:	1932-7455 1932-7447
DOI:	10.1021/acs.jpcc.5b00138
Popis:	Bimetallic surfaces offer activity benefits derived from synergistic effects among active sites with uniquely different functions, which is particularly important for the development of highly effective heterogeneous catalysts for specific technological applications, such as energy conversion and storage. Here we report on Pt—Si bulk samples prepared by arc-melting, for the first time, with high activities toward the electro-oxidation of CO and methanol. Increasing the Si concentration on the surface was correlated with the shifts of onset oxidation potentials to lower values and higher activities for CO and methanol electro-oxidation. It is proposed that the reaction on the Pt—Si catalyst could follow a Langmuir–Hinshelwood type of mechanism, where substantially enhanced catalytic activity is attributed to the fine-tuning of the surface Pt—Si atomic structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::44d877179c8dcfe8cad4829c92cc7d42 https://doi.org/10.1021/acs.jpcc.5b00138 Zobrazit plný text záznamu