High Electrochemical Performance and Stability of Co-Deposited Pd–Au on Phase-Pure Tungsten Carbide for Hydrogen Oxidation

Autor:	Suenghoon Han, Jae Sung Lee, Sang Min Ji, Dong Jin Ham, Chanho Pak, Seon-Ah Jin, Hyuk Chang
Rok vydání:	2012
Předmět:	Materials science Inorganic chemistry chemistry.chemical_element Proton exchange membrane fuel cell General Chemistry Tungsten Electrochemistry Electrocatalyst Catalysis chemistry.chemical_compound chemistry Tungsten carbide Dissolution Carbon
Zdroj:	Topics in Catalysis. 55:922-930
ISSN:	1572-9028 1022-5528
Popis:	Co-deposited Pd and Au nanoparticles were loaded on phase-pure tungsten mono-carbide (WC) prepared by a polymer-induced carburization method. Among the electrocatalysts, Pd3Au/WC displayed an excellent electrochemical activity for the hydrogen oxidation reaction comparable to the state-of-the-art Pt/C catalyst both in half-cell tests and single cell tests under proton exchange membrane fuel cell (PEMFC) conditions. This unique and strong synergistic effect was not observed on the carbon support, and thus the crucial role of WC was demonstrated as a strongly interacting support as well as an active component of the electrocatalyst. Dissolution of Pd observed on the carbon support was suppressed in this Pd3Au/WC electrocatalyst, which showed good stability in a continuous operation for 3,000 min. Thus the proposed electrocatalyst could be a potential alternative anode catalyst of lower cost for PEMFC replacing Pt/C.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8b1d311c4cd2b0c9889f3782b7d107b2 https://doi.org/10.1007/s11244-012-9875-2 Zobrazit plný text záznamu Plný text ve formátu PDF