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Platinum‐Decorated Ruthenium Nanoparticles for Enhanced Methanol Electrooxidation
Author(s) -
Chen ChingHsiang,
Sarma Loka Subramanyam,
Wang DiYan,
Lai FengJu,
Al Andra CunCun,
Chang ShiHong,
Liu DinGoa,
Chen ChiaChun,
Lee JyhFu,
Hwang BingJoe
Publication year - 2010
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.200900051
Subject(s) - catalysis , electrocatalyst , ruthenium , platinum , methanol , nanoparticle , yield (engineering) , noble metal , materials science , redox , transmetalation , inorganic chemistry , chemistry , metal , chemical engineering , electrochemistry , nanotechnology , electrode , organic chemistry , metallurgy , engineering
A promising electrocatalyst based on the reduction of Pt 2+ ions on the surface of hexagonally close‐packed (hcp) Ru core nanoparticles has been prepared by a redox–transmetalation process. This simple synthetic process generates a Pt‐on‐Ru catalyst with a lower Pt content than commercially available PtRu electrocatalysts and with a long‐range ordered hcp structure, which can significantly reduce the Pt loading. X‐Ray absorption spectroscopy of the Pt‐on‐Ru catalyst reveals pronounced electronic modifications when compared to the commercial PtRu black catalyst. The Pt‐on‐Ru catalyst exhibits a higher mass‐specific current than the PtRu black catalyst in solution in 0.5 M H 2 SO 4 with 10 vol. % CH 3 OH under the conditions of rotating disk experiments. Further optimization of this synthetic procedure may yield even more active electrocatalysts with a significant reduction in noble metal loadings.