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Title

Effective ionic-liquid microemulsion based electrodeposition of mesoporous Co-Pt films for methanol oxidation catalysis in alkaline media

AuthorsSerrà, Albert; Gómez, Elvira; Golosovsky, Igor V.; Nogués, Josep ; Vallés, Elisa
Issue Date2016
PublisherRoyal Society of Chemistry (UK)
CitationJournal of Materials Chemistry A 4(20): 7805-7814 (2016)
AbstractPt-based direct methanol fuel cells are attracting increasing interest as environmentally friendly alternative energy sources. However, the high price of Pt and the difficulty to prepare favourable morphologies for catalysis (e.g., mesoporous materials) are hampering their development into feasible products. Here, we demonstrate a novel approach to efficiently grow mesoporous films of Pt-poor alloys (CoPt and CoPt), based on electrodeposition in ionic liquid-in-water (IL/W) microemulsions. The high proportion of the electrolytic aqueous solution in the IL/W microemulsion favors a significant deposition rate, while the presence of IL drops induces the formation of highly mesoporous films. The mesoporous alloys, with pores in the 8-11 nm range, exhibit excellent durability in acidic and alkaline aggressive media, maintaining their peculiar morphology. The structures are very efficient for the catalysis of methanol electro-oxidation in alkaline media, with minimal poisoning of the catalysts. These results pave the way to develop simple, versatile environmentally friendly fuel cell catalysts to commercialize new viable ecological alternative energy sources.
URIhttp://hdl.handle.net/10261/159398
DOI10.1039/C6TA02035F
Identifiersdoi: 10.1039/C6TA02035F
e-issn: 2050-7496
issn: 2050-7488
Appears in Collections:(CIN2) Artículos
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