Bimetallic NiPt nanoparticles-enhanced catalyst supported on alginate-based biohydrogels for sustainable hydrogen production

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dc.contributor.authorRamirez, Oscar
dc.contributor.authorBonardd, Sebastian
dc.contributor.authorSaldias, Cesar
dc.contributor.authorKroff, Macarena
dc.contributor.authorO'Shea, James N.
dc.contributor.authorDiaz, David Diaz
dc.contributor.authorLeiva, Angel
dc.date.accessioned2025-01-20T20:18:43Z
dc.date.available2025-01-20T20:18:43Z
dc.date.issued2023
dc.description.abstractAlginate hydrogel beads were loaded with bimetallic NiPt nanoparticles by in situ reduction of the respective polymer matrix containing precursor metallic ions using a NaBH4 aqueous solution. The alginate hydrogel beads loaded with NiPt nanoparticles were characterized by TEM, AAS, FT-IR, TGA, XPS, and oscillatory rheometry. The prepared hybrid hydrogels were proven to be effective as catalytic materials for the hydrolysis of ammonia borane (AB) for quantitative hydrogen generation using catalytic loadings of 0.1 mol%. In addition, the reaction mechanism of the hydrolytic reaction using NiPt loaded alginate hydrogel beads was determined by Langmuir-Hinshelwood model. The experimental results showed that the reaction mechanism consisted of an initial fast adsorption of reactants at the surface of the nanoparticles, followed by a rate-limiting surface reaction. The NiPt nanoalloys exhibited an enhanced behavior for hydrogen generation with a maximum TOF of 84.1 min-1, almost 71 % higher compared to monometallic platinum atoms, and likely related to a synergistic interaction between both metals. Finally, the hydrogel matrix enabled the material to be easily recovered from the reaction medium and reused in further catalytic cycles without desorption of active nanoparticles from the material.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.ijbiomac.2022.11.106
dc.identifier.eissn1879-0003
dc.identifier.issn0141-8130
dc.identifier.urihttps://doi.org/10.1016/j.ijbiomac.2022.11.106
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92479
dc.identifier.wosidWOS:000915891200001
dc.language.isoen
dc.pagina.final502
dc.pagina.inicio494
dc.revistaInternational journal of biological macromolecules
dc.rightsacceso restringido
dc.subjectNiPt nanoparticles
dc.subjectCatalyst
dc.subjectBiohydrogel
dc.subjectHydrogen production
dc.subjectammonia borane
dc.subject.ods07 Affordable and Clean Energy
dc.subject.odspa07 Energía asequible y no contaminante
dc.titleBimetallic NiPt nanoparticles-enhanced catalyst supported on alginate-based biohydrogels for sustainable hydrogen production
dc.typeartículo
dc.volumen225
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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