150641 20251017144612.0 doi 10.1039/d1na00021g sideral 125873 ART-2021-125873 eng Sanz-Marco, Arturo Universidad de Zaragoza (orcid)0000-0003-1123-2635 LED-driven controlled deposition of Ni onto TiO2 for visible-light expanded conversion of carbon dioxide into C1-C2 alkanes 2021 Access copy available to the general public Unrestricted Photocatalytic gas-phase hydrogenation of CO2into alkanes was achieved over TiO2-supported Ni nanoparticles under LED irradiation at 365 nm, 460 nm and white light. The photocatalysts were prepared using photo-assisted deposition of Ni salts under LED irradiation at 365 nm onto TiO2P25 nanoparticles in methanol as a hole scavenger. This procedure yielded 2 nm Ni particles decorating the surface of TiO2with a nickel mass content of about 2%. Before the photocatalytic runs, Ni/TiO2was submitted to thermal reduction at 400 °C in a 10% H2atmosphere which induced O-defective TiO2-xsubstrates. The formation of oxygen vacancies, Ti3+centers and metallic Ni sites upon photocatalytic CO2hydrogenation was confirmed byoperandoEPR analysis.In situXPS under reaction conditions suggested a strong metal-support interaction and the co-existence of zero and divalent Ni states. These photoactive species enhanced the photo-assisted reduction of CO2below 300 °C to yield CO, CH4and C2H6as final products. info:eu-repo/grantAgreement/ES/MICINN/CTQ2016-77144-R info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 5.598 2021 MATERIALS SCIENCE, MULTIDISCIPLINARY 111 / 344 = 0.323 2021 Q2 T1 CHEMISTRY, MULTIDISCIPLINARY 56 / 179 = 0.313 2021 Q2 T1 NANOSCIENCE & NANOTECHNOLOGY 55 / 108 = 0.509 2021 Q3 T2 1.043 2021 Atomic and Molecular Physics, and Optics 2021 Q1 Materials Science (miscellaneous) 2021 Q1 Engineering (miscellaneous) 2021 Q1 Bioengineering 2021 Q1 5.7 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Hueso, José L. (orcid)0000-0002-4546-4111 Sebastián, Víctor Universidad de Zaragoza (orcid)0000-0002-6873-5244 Nielsen, David Mossin, Susanne Holgado, Juan P. Bueno-Alejo, Carlos J. (orcid)0000-0002-8762-6203 Balas, Francisco Universidad de Zaragoza (orcid)0000-0001-5512-0075 Santamaría, Jesús Universidad de Zaragoza (orcid)0000-0002-8701-9745 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 3, 13 (2021), 3788-3798 Nanoscale Advances 2516-0230 1492206 http://zaguan.unizar.es/record/150641/files/texto_completo.pdf Versión publicada 2774090 http://zaguan.unizar.es/record/150641/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:150641 articulos driver 2025-10-17-14:17:59 ARTICLE