Oxidation of ammonia using PtRh/C electrocatalysts: fuel cell and electrochemical evaluation

Página do item simplificado
dc.contributor.authorASSUMPCAO, MONICA H.M.T.
dc.contributor.authorPIASENTIN, RICARDO M.
dc.contributor.authorHAMMER, PETER
dc.contributor.authorSOUZA, RODRIGO F.B. de
dc.contributor.authorBUZZO, GUILHERME S.
dc.contributor.authorSANTOS, MAURO C.
dc.contributor.authorSPINACE, ESTEVAM V.
dc.contributor.authorOLIVEIRA NETO, ALMIR
dc.contributor.authorSILVA, JULIO C.M. da
dc.coverageInternacionalpt_BR
dc.date.accessioned2015-07-23T12:57:30Z
dc.date.available2015-07-23T12:57:30Z
dc.date.issued2015pt_BR
dc.description.abstractThis study reports on the use of PtRh/C electrocatalysts prepared by the borohydride reduction method with different Pt:Rh atomic ratios: (90:10, 70:30 and 50:50) which was investigated toward the ammonia electro-oxidation considering electrochemical and also direct ammonia fuel cell (DAFC) experiments. The DAFC experiments were conducted using different proportions of NH4OH and KOH as fuels. X-ray diffraction showed the formation of PtRh alloy while transmission electron micrographs showed the particles sizes between 4.1 and 4.5 nm. Among the different NH4OH and KOH concentrations the combination of 3 mol L−1 NH4OH and 3 mol L−1 KOH was the most favorable due to the higher KOH concentration, which increased the electrolyte conductivity, thus, improving the ammonia oxidation. Moreover, among the PtRh/C electrocatalysts the Pt:Rh ratio of 90:10 showed to be the best suited one since it showed a power density almost 60% higher than Pt. X-ray photoelectron spectroscopy results revealed for this catalyst that the nanoparticles contain a high proportion of metallic Pt and Rh phases, supporting the alloy formation between Pt and Rh. The improved fuel cell efficiency can be related to the combination of different effects: the alloy formation between Pt and Rh (electronic effect), suppressing the adsorption strength of poisonous intermediates, and a synergic effect between Pt and Rh at this composition.
dc.format.extent136-144pt_BR
dc.identifier.citationASSUMPCAO, MONICA H.M.T.; PIASENTIN, RICARDO M.; HAMMER, PETER; SOUZA, RODRIGO F.B. de; BUZZO, GUILHERME S.; SANTOS, MAURO C.; SPINACE, ESTEVAM V.; OLIVEIRA NETO, ALMIR; SILVA, JULIO C.M. da. Oxidation of ammonia using PtRh/C electrocatalysts: fuel cell and electrochemical evaluation. <b>Applied Catalysis B: Environmental</b>, v. 174-175, p. 136-144, 2015. DOI: <a href="https://dx.doi.org/10.1016/j.apcatb.2015.02.021">10.1016/j.apcatb.2015.02.021</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/23837.
dc.identifier.doi10.1016/j.apcatb.2015.02.021
dc.identifier.issn0926-3373pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9287-6071
dc.identifier.orcidhttps://orcid.org/0000-0002-7011-8261
dc.identifier.percentilfi95.92
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/23837
dc.identifier.vol174-175pt_BR
dc.relation.ispartofApplied Catalysis B: Environmentalpt_BR
dc.rightsopenAccesspt_BR
dc.subjectoxidation
dc.subjectammonia
dc.subjectfuel cells
dc.subjectelectrocatalysts
dc.subjectborohydrides
dc.titleOxidation of ammonia using PtRh/C electrocatalysts: fuel cell and electrochemical evaluationpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorPETER HAMMER
ipen.autorRODRIGO FERNANDO BRAMBILLA DE SOUZA
ipen.autorJULIO CESAR M. DA SILVA
ipen.autorALMIR OLIVEIRA NETO
ipen.autorESTEVAM VITORIO SPINACE
ipen.autorMAURO C. SANTOS
ipen.autorRICARDO MARCELO PIASENTIN
ipen.autorMONICA HELENA MARCON TEIXEIRA ASSUMPÇAO
ipen.codigoautor10718
ipen.codigoautor11260
ipen.codigoautor9865
ipen.codigoautor3541
ipen.codigoautor555
ipen.codigoautor8452
ipen.codigoautor925
ipen.codigoautor10679
ipen.contributor.ipenauthorPETER HAMMER
ipen.contributor.ipenauthorRODRIGO FERNANDO BRAMBILLA DE SOUZA
ipen.contributor.ipenauthorJULIO CESAR M. DA SILVA
ipen.contributor.ipenauthorALMIR OLIVEIRA NETO
ipen.contributor.ipenauthorESTEVAM VITORIO SPINACE
ipen.contributor.ipenauthorMAURO C. SANTOS
ipen.contributor.ipenauthorRICARDO MARCELO PIASENTIN
ipen.contributor.ipenauthorMONICA HELENA MARCON TEIXEIRA ASSUMPÇAO
ipen.date.recebimento15-07pt_BR
ipen.identifier.fi8.328pt_BR
ipen.identifier.ipendoc20873pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.identifier.ods7
ipen.range.fi6.000 ou mais
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
relation.isAuthorOfPublicationc256cae5-7fdd-4a29-b000-709667ed91e3
relation.isAuthorOfPublication53d64670-0c2b-4b26-8292-00272c68a0ac
relation.isAuthorOfPublication75989061-bb6e-4576-9759-03fb2cf7b873
relation.isAuthorOfPublication13be55b2-f917-45c4-bc6b-5f315bd0290f
relation.isAuthorOfPublicationb0db71ff-181e-47eb-858d-42e12ef2a93e
relation.isAuthorOfPublication1baa1431-cca2-448e-8bfa-258ae4bbef5b
relation.isAuthorOfPublicationa9265c99-6ad6-4850-83e9-1822e1a4170c
relation.isAuthorOfPublicationd38eaabb-ea87-4a03-b9d3-a670cea2e9ee
relation.isAuthorOfPublication.latestForDiscoveryd38eaabb-ea87-4a03-b9d3-a670cea2e9ee
sigepi.autor.atividadeASSUMPCAO, MONICA H.M.T.:10679:-1:S
sigepi.autor.atividadePIASENTIN, RICARDO M.:925:610:N
sigepi.autor.atividadeHAMMER, PETER:10718:-1:N
sigepi.autor.atividadeSOUZA, RODRIGO F.B. DE:11260:-1:N
sigepi.autor.atividadeSANTOS, MAURO C.:8452:-1:N
sigepi.autor.atividadeSPINACE, ESTEVAM V.:555:610:N
sigepi.autor.atividadeOLIVEIRA NETO, ALMIR:3541:610:N
sigepi.autor.atividadeSILVA, JULIO C.M. DA:9865:-1:N
Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
20873.pdf
Tamanho:
3.78 MB
Formato:
Adobe Portable Document Format
Descrição:
Baixar
Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar
Coleções
Periódicos