Asosiy kontentga oʻtish
AkademIndex

Mahsulotlar

Ishlab chiquvchilar uchun

AkademBaseEkotizim uchun ochiq API
Maqola

Near UV‐Irradiation of CuO<sub>x</sub>‐Impregnated TiO<sub>2</sub> Providing Active Species for H<sub>2</sub> Production Through Methanol Photoreforming

Giuseppe VitielloCSGI – Center for Colloids and Surface Science University of Florence via della Lastruccia 3 50019 Sesto Fiorentino (FI) ItalyLaura ClariziaDepartment of Chemical, Materials and Production Engineering (DICMaPI) University of Naples Federico II p.le Tecchio 80 80125 Naples ItalyWael H.M. AbdelraheemDepartment of Chemistry, Faculty of Science Sohag University 82524 Sohag EgyptSerena EspositoDepartment of Applied Science and Technology and INSTM Unit of Turin-Polytechnic Polytechnic of Turin C.so Duca degli Abruzzi 24 I-10129 Turin ItalyBarbara BonelliDepartment of Applied Science and Technology and INSTM Unit of Turin-Polytechnic Polytechnic of Turin C.so Duca degli Abruzzi 24 I-10129 Turin ItalyNicoletta DitarantoDepartment of Chemistry University of Bari Aldo Moro via Orabona 4 70125 Bari ItalyAlessandro VergaraDepartment of Chemical Sciences University of Naples Federico II Complesso di Monte S. Angelo 80126 Naples ItalyMallikarjuna N. NadagoudaDepartment of Mechanical and Materials Engineering Wright State University Dayton, Ohio 45324 USADionysios D. DionysiouEnvironmental Engineering and Science Program Department of Chemical and Environmental Engineering 705 Engineering Research Center University of Cincinnati Cincinnati OH 45221-0012 USARoberto AndreozziDepartment of Chemical, Materials and Production Engineering (DICMaPI) University of Naples Federico II p.le Tecchio 80 80125 Naples ItalyGiuseppina LucianiDepartment of Chemical, Materials and Production Engineering (DICMaPI) University of Naples Federico II p.le Tecchio 80 80125 Naples ItalyRaffaele MarottaDepartment of Chemical, Materials and Production Engineering (DICMaPI) University of Naples Federico II p.le Tecchio 80 80125 Naples Italy
ChemCatChemjournal2019en
ABI

Annotatsiya

Abstract Copper doped‐TiO 2 (P25) nanomaterials have been intensively studied as promising catalysts for H 2 production by photo‐reforming of selected organic compounds. However, the role of copper oxidation states on the improvement of photocatalytic activity is still debated. In this work, CuO x ‐impregnated P25‐TiO 2 catalysts were used for photocatalytic production of hydrogen from methanol. Copper species/oxidation states both in the as‐prepared catalysts and after the photocatalytic process were investigated. To this purpose, H 2 production rates were correlated to physico‐chemical properties of the samples, both before and after photocatalytic process, by means of Raman, X‐Ray Diffraction, Electron Paramagnetic Resonance spectroscopy, X‐Ray Photoelectron Spectroscopy, Temperature‐Programmed Reduction and High Resolution Transmission Electron Microscope techniques. Results revealed the presence of both Cu 2 O and CuO deposits on the samples surface after calcination. Notably, under near‐UV irradiation, the fraction of highly dispersed CuO particles undergo a partial dissolution process, followed by reduction to metallic copper Cu (s) by photogenerated electrons, boosting H 2 production rate. Our findings indicate that both Cu 2 O and Cu (s) act as co‐catalysts for H 2 generation, yet by different mechanisms. Overall this study, provides the basis to enhance catalytic performance of red‐ox active systems through UV‐irradiation approach.

Hali tarjima qilinmagan

Mavzular

Advanced Photocatalysis TechniquesCopper-based nanomaterials and applicationsNanomaterials for catalytic reactions

Identifikatorlar

DOI
10.1002/cctc.201900818

Iqtiboslar va manbalar

0 ta iqtibos54 ta foydalanilgan manba
Koʻrsatkichlar — AkademScholar