Recent advances in platinum monolayer electrocatalysts for oxygen reduction reaction: Scale-up synthesis, structure and activity of Pt shells on Pd cores

Autor:	Hideo Naohara, Nebojsa Marinkovic, Jia X. Wang, Kotaro Sasaki, Hiromi Inada, Karren L. More, Radoslav R. Adzic
Rok vydání:	2010
Předmět:	General Chemical Engineering Analytical chemistry chemistry.chemical_element Nanoparticle Electrochemistry Electrocatalyst Catalysis chemistry Transition metal Chemical engineering Monolayer Platinum Palladium
Zdroj:	Electrochimica Acta. 55:2645-2652
ISSN:	0013-4686
DOI:	10.1016/j.electacta.2009.11.106
Popis:	We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core–shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts’ inadequate activity and high Pt content.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::613dbb7b456942ccdd29f8ca03a58b7f https://doi.org/10.1016/j.electacta.2009.11.106 Zobrazit plný text záznamu Full Text from ScienceDirect