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RESEARCH PRODUCT
High efficiency of Pt2+ - CeO2 novel thin film catalyst as anode for proton exchange membrane fuel cells
Albert BruixIva MatolínováIvan KhalakhanMichal VaclavuValérie PotinVladimír MatolínJaroslava LavkovaJaroslava LavkovaAlberto FiguerobaRoman FialaMykhailo VorokhtaKonstantin M. NeymanKonstantin M. NeymanFrancesc IllasAndrii Rednyksubject
Cerium oxideMaterials scienceSURFACEInorganic chemistrychemistry.chemical_elementProton exchange membrane fuel cell02 engineering and technology010402 general chemistry7. Clean energy01 natural sciencesCatalysisCatalysisWAVE BASIS-SETX-ray photoelectron spectroscopyNANOPARTICLESSPECTRAHYDROGENATIONThin filmThin filmGeneral Environmental SciencePLATINUMProcess Chemistry and TechnologyTOTAL-ENERGY CALCULATIONSCERIUM OXIDE-FILMSNANOSTRUCTUREFuel cellCerium oxide021001 nanoscience & nanotechnology0104 chemical sciencesAnodeELECTRONIC-STRUCTUREMembranechemistry0210 nano-technologyPlatinumdescription
Abstract The elevated price of Pt limits the large-scale implementation of commercial proton exchange membrane fuel cells, which effectively convert chemical energy into electricity. In order to increase the cost-efficiency in proton-exchange membrane fuel cells, we have designed a family of novel anode catalysts consisting of thin films of ceria with low Pt loadings sputtered on a nanostructured carbon support. Remarkably, only such small amounts of Pt are necessary for achieving power density values comparable to the reference commercial catalysts, which results in excellent specific activities of our samples. By combining photoelectron spectroscopy and catalytic performance analysis, we have shown that the surface Pt 2+ species in cerium oxide exhibit high electrocatalytic activity. Density functional theory calculations show that the great stability of Pt 2+ species on ceria makes these resistant to reduction by hydrogenation and suggests that the formation of such stable surface complexes prevents degradation of the nanostructured composite.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-11-15 |