LED-driven controlled deposition of Ni onto TiO2 for visible-light expanded conversion of carbon dioxide into C1-C2 alkanes

Sanz-Marco, Arturo (Universidad de Zaragoza) ; Hueso, José L. ; Sebastián, Víctor (Universidad de Zaragoza) ; Nielsen, David ; Mossin, Susanne ; Holgado, Juan P. ; Bueno-Alejo, Carlos J. ; Balas, Francisco (Universidad de Zaragoza) ; Santamaría, Jesús (Universidad de Zaragoza)

Resumen: 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.

Idioma: Inglés

DOI: 10.1039/d1na00021g

Año: 2021

Publicado en: Nanoscale Advances 3, 13 (2021), 3788-3798
ISSN: 2516-0230

Factor impacto JCR: 5.598 (2021)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 111 / 344 = 0.323 (2021) - Q2 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 56 / 179 = 0.313 (2021) - Q2 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 55 / 108 = 0.509 (2021) - Q3 - T2

Factor impacto CITESCORE: 5.7 - Engineering (Q1) - Materials Science (Q1) - Physics and Astronomy (Q1) - Chemical Engineering (Q2)

Factor impacto SCIMAGO: 1.043 - Atomic and Molecular Physics, and Optics (Q1) - Materials Science (miscellaneous) (Q1) - Engineering (miscellaneous) (Q1) - Bioengineering (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MICINN/CTQ2016-77144-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)