The effect of support on Pd1Nb1 electrocatalysts for ethanol fuel cells

dc.creatorSOUZA, FELIPE M.
dc.creatorNANDENHA, JULIO
dc.creatorOLIVEIRA, VITOR H.A.
dc.creatorPAZ, EDSON C.
dc.creatorPINHEIRO, VICTOR S.
dc.creatorAVEIRO, LUCI R.
dc.creatorPARREIRA, LUANNA S.
dc.creatorSILVA, JULIO C.M.
dc.creatorBATISTA, BRUNO L.
dc.creatorNETO, ALMIR O.
dc.creatorSANTOS, MAURO C.
dc.date2020
dc.date2020-10-16T12:55:15Z
dc.date2020-10-16T12:55:15Z
dc.date.accessioned2023-09-28T14:16:23Z
dc.date.available2023-09-28T14:16:23Z
dc.identifier0960-1481
dc.identifierhttp://repositorio.ipen.br/handle/123456789/31445
dc.identifier150
dc.identifier10.1016/j.renene.2019.12.110
dc.identifier0000-0001-8745-3421
dc.identifier85.82
dc.identifier88.00
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9001668
dc.descriptionPd1Nb1/C on different kinds of carbon black were prepared by a modified sol-gel method. The alkaline direct ethanol fuel cell (ADEFC) performance was performed first with the Pd1Nb1 electrocatalysts and then by varying the fuel concentration. In CV, Pd1Nb1/Printex 6L (50:50 wt%) exhibited 2.2 times higher mass activity than that of the Pd/C (Alfa Aesar); their mass activities were 1300 and 590 mA mg 1 Pd , respectively. The best performance for the ADEFC was obtained using Pd1Nb1/Printex 6L, which yielded a maximum power density and cell voltage of 28 mW cm 2 and 1.17 V, respectively. The Pd1Nb1/Printex 6L electrocatalyst exhibited a more negative onset potential for the CO stripping reaction. We suggest that the higher hydrophilicity (contact angle) and higher degree of disorder of Printex 6L (Raman) corroborates these results. In addition, both bifunctional and electronic effects operated on the electrocatalyst due to the presence of metal oxides and alloys of PdNb (XRD), respectively, in the synthesized electrocatalysts. Therefore, it was notable that the support has an essential roledas important as the cocatalystdin the electrocatalytic performance.
dc.descriptionFunda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq)
dc.descriptionFAPESP: 15/10314-8; 17/00819-8; 17/10118-0; 17/22976-0; 17/21846-6; 17/26288-1
dc.descriptionCNPq: 406612/2013-7; 429727/2018-6
dc.format293-306
dc.relationRenewable Energy
dc.rightsopenAccess
dc.subjectethanol fuels
dc.subjectdirect ethanol fuel cells
dc.subjectethanol
dc.subjectoxidation
dc.subjectpalladium
dc.subjectniobium
dc.subjectsol-gel process
dc.subjectelectrochemistry
dc.subjectelectrocatalysts
dc.titleThe effect of support on Pd1Nb1 electrocatalysts for ethanol fuel cells
dc.typeArtigo de peri??dico
dc.coverageI


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