CdTe quantum dots modified electrodes ITO-(Polycation/QDs) for carbon dioxide reduction to methanol

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dc.contributor.authorGuzman, Diego
dc.contributor.authorIsaacs, Mauricio
dc.contributor.authorTsukuda, Tatsuya
dc.contributor.authorYamazoe, Seiji
dc.contributor.authorTakahata, Ryo
dc.contributor.authorSchrebler, Ricardo
dc.contributor.authorBurgos, Ana
dc.contributor.authorOsorio Roman, Igor
dc.contributor.authorCastillo, Francisco
dc.date.accessioned2024-01-10T12:37:55Z
dc.date.available2024-01-10T12:37:55Z
dc.date.issued2020
dc.description.abstractThe present work describes the characterization by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and electrochemical techniques of ITO modified electrodes with electrostatic assemblies (Polycation/Quantum Dots) and their use in the electro- and photoelectrocatalytic reduction of CO2. These assemblies were prepared with polycations poly-diallyldimethylammonium (PD) and poly-(2-trimethylammonium) ethyl methacrylate (PM) and nanocrystals of CdTe of 2.77 nm (Q2). The size of the nanocrystals was controlled by the synthesis reflux time and incorporated by electric field directed Layer-by-Layer assembly method (EFDLA). The polycations were characterised by NMR measurements; showing important effects on the electrostatic assemblies. PM modified electrodes, with its lower rigidity, exhibited less roughness than the PD modified electrodes, 8.0 nm versus 32.8 nm, and higher heterogeneity in its surface composition. Higher resistance to the charge transfer and time constants were obtained with PMQ2 modified electrode, 63.8 Omega cm(-2) and 2.69 ms versus 49.30 Omega cm(-2) and 1.3 ms for PDQ2. The electro- and photoelectro properties for CO 2 reduction were studied through j-E curves and potential controlled electrolysis. Modified surfaces were active toward the reduction of CO2, with a positive shift of the activity between darkness and irradiation conditions, 0.050 V with PDQ2 and 0.450 V with PMQ2. The main product of the CO2 reduction was CH3OH, with traces of CO and HCOOH. The PM modified electrodes with QDs of 2.77 nm presented a selective behaviour for the production of CH3OH.
dc.description.funderFONDECYT
dc.description.funderCONICYT
dc.description.funderPontificia Universidad Catolica de Chile
dc.description.funderMinistry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan
dc.fechaingreso.objetodigital20-03-2024
dc.format.extent10 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.apsusc.2020.145386
dc.identifier.eissn1873-5584
dc.identifier.issn0169-4332
dc.identifier.urihttps://doi.org/10.1016/j.apsusc.2020.145386
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76949
dc.identifier.wosidWOS:000514827600002
dc.information.autorucQuímica;Castillo Suzarte Francisco Jav;S/I;155693
dc.information.autorucQuímica;Isaacs Casanova Mauricio Aleja;S/I;1009751
dc.language.isoen
dc.nota.accesocontenido parcial
dc.publisherELSEVIER
dc.revistaAPPLIED SURFACE SCIENCE
dc.rightsacceso restringido
dc.subjectQuantum dots
dc.subjectPolycations
dc.subjectCarbon dioxide
dc.subjectModified electrode
dc.subjectElectrodic surface
dc.subjectPHOTOELECTROCHEMICAL REDUCTION
dc.subjectCO2
dc.subjectFILMS
dc.subjectH-1
dc.subject.ods07 Affordable and Clean Energy
dc.subject.ods13 Climate Action
dc.subject.odspa07 Energía asequible y no contaminante
dc.subject.odspa13 Acción por el clima
dc.titleCdTe quantum dots modified electrodes ITO-(Polycation/QDs) for carbon dioxide reduction to methanol
dc.typeartículo
dc.volumen509
sipa.codpersvinculados155693
sipa.codpersvinculados1009751
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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