In situ determination of the nanostructure effects on the activity, stability and selectivity of Pt-Sn ethanol oxidation catalysts
Nanoparticle catalysts comprising two PtSn alloys with different Pt:Sn atomic ratios and a Sn modified Pt catalyst were prepared in order to study the effect of the particle nanostructures on the activity towards the ethanol electrooxidation and the selectivity to CO2. An accurate model of the elect...
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Elsevier B.V.
2018
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| LEADER | 15097caa a22012977a 4500 | ||
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| 001 | PAPER-16879 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518204756.0 | ||
| 008 | 190410s2018 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-85032214475 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a JECHE | ||
| 100 | 1 | |a Calvillo, L. | |
| 245 | 1 | 3 | |a In situ determination of the nanostructure effects on the activity, stability and selectivity of Pt-Sn ethanol oxidation catalysts |
| 260 | |b Elsevier B.V. |c 2018 | ||
| 270 | 1 | 0 | |m Calvillo, L.; Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, Italy; email: laura.calvillolamana@unipd.it |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a Nanoparticle catalysts comprising two PtSn alloys with different Pt:Sn atomic ratios and a Sn modified Pt catalyst were prepared in order to study the effect of the particle nanostructures on the activity towards the ethanol electrooxidation and the selectivity to CO2. An accurate model of the electronic and structural properties, obtained by ex situ analysis, was established. Alloying of Sn with Pt causes the expansion of the lattice parameter of Pt and modifies its electronic structure. In contrast, the deposition of Sn on the Pt surface has neither effect. The activity of the catalysts towards ethanol oxidation was established voltammetrically and the CO2 selectivity via in situ Fourier transform infrared spectroscopy (FTIRS). Results indicated that the modification of the electronic environment of Pt in Pt-Sn alloys results in a weaker adsorption of the intermediates (acetaldehyde and acetic acid), which desorb easily from the surface of the catalyst resulting in incomplete oxidation to CO2. In contrast, when the electronic structure is not perturbed (Sn modified Pt sample), the amount of CO2 produced increases. The stability of the different nanostructures under working conditions was investigated by in situ X-ray absorption spectroscopy (XAS) measurements, which show that initially both the Sn modified Pt and Pt-Sn alloy nanostructures are stable under applied potential in the potential window studied and in presence of ethanol. Accelerated aging studies showed that the Sn modified Pt nanostructure remained stable, whereas a significant structural change was observed for the Pt-Sn alloys. © 2017 Elsevier B.V. |l eng | |
| 536 | |a Detalles de la financiación: Marie Curie | ||
| 536 | |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica | ||
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas | ||
| 536 | |a Detalles de la financiación: L.C. acknowledges support via an EU Marie Curie Intra-European Fellowship under contract no. FP7-PEOPLE-2010-IEF-272632 . EJC and LMD acknowledge financial support from CONICET and ANPCyT (Argentina). The authors acknowledge the LMA-INA, UK Catalysis Hub, Diamond Light Source and the ALBA synchrotron light source for offering access to their instruments and expertise and for provision of beamtime (SP8071 and 2012100428). Dr. Giannantonio Cibin, Dr. Andy Dent and Dr. Stephen Parry are acknowledged for the excellent beamline support at the Diamond Light Source and Dr. Laura Simonelli at ALBA Synchrotron Light Source. The data used in this paper can be found in the Southampton University Deposit with DOI: https://doi.org/10.5258/SOTON/D0294 . Appendix A | ||
| 593 | |a Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom | ||
| 593 | |a Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, Padova, 35131, Italy | ||
| 593 | |a INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina | ||
| 593 | |a Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, OX11 0DE, United Kingdom | ||
| 690 | 1 | 0 | |a ETHANOL ELECTROOXIDATION |
| 690 | 1 | 0 | |a IN SITU FTIRS |
| 690 | 1 | 0 | |a IN SITU XAFS |
| 690 | 1 | 0 | |a PT-SN NANOSTRUCTURES |
| 690 | 1 | 0 | |a STRUCTURAL STABILITY |
| 690 | 1 | 0 | |a BINARY ALLOYS |
| 690 | 1 | 0 | |a CARBON DIOXIDE |
| 690 | 1 | 0 | |a CATALYST ACTIVITY |
| 690 | 1 | 0 | |a CATALYST SELECTIVITY |
| 690 | 1 | 0 | |a CATALYSTS |
| 690 | 1 | 0 | |a ELECTRONIC STRUCTURE |
| 690 | 1 | 0 | |a ELECTROOXIDATION |
| 690 | 1 | 0 | |a ETHANOL |
| 690 | 1 | 0 | |a FOURIER TRANSFORM INFRARED SPECTROSCOPY |
| 690 | 1 | 0 | |a NANOSTRUCTURES |
| 690 | 1 | 0 | |a OXIDATION |
| 690 | 1 | 0 | |a PLATINUM |
| 690 | 1 | 0 | |a REACTION INTERMEDIATES |
| 690 | 1 | 0 | |a STABILITY |
| 690 | 1 | 0 | |a THALLIUM ALLOYS |
| 690 | 1 | 0 | |a TIN |
| 690 | 1 | 0 | |a TIN ALLOYS |
| 690 | 1 | 0 | |a TIN COMPOUNDS |
| 690 | 1 | 0 | |a X RAY ABSORPTION SPECTROSCOPY |
| 690 | 1 | 0 | |a ELECTRONIC AND STRUCTURAL PROPERTIES |
| 690 | 1 | 0 | |a ELECTRONIC ENVIRONMENTS |
| 690 | 1 | 0 | |a ETHANOL ELECTRO-OXIDATION |
| 690 | 1 | 0 | |a IN-SITU X-RAY ABSORPTION SPECTROSCOPY |
| 690 | 1 | 0 | |a NANOPARTICLE CATALYSTS |
| 690 | 1 | 0 | |a SITU XAFS |
| 690 | 1 | 0 | |a SN NANOSTRUCTURES |
| 690 | 1 | 0 | |a STRUCTURAL STABILITIES |
| 690 | 1 | 0 | |a PLATINUM ALLOYS |
| 700 | 1 | |a Mendez De Leo, L. | |
| 700 | 1 | |a Thompson, S.J. | |
| 700 | 1 | |a Price, S.W.T. | |
| 700 | 1 | |a Calvo, E.J. | |
| 700 | 1 | |a Russell, A.E. | |
| 773 | 0 | |d Elsevier B.V., 2018 |g v. 819 |h pp. 136-144 |x 15726657 |t Journal of Electroanalytical Chemistry | |
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