Title:	Investigating the Metal−TiO2 Influence for Highly Selective Photocatalytic Oxidation of Methane to Methanol.
Authors:	SILVA, M. A. R. da GIL, J. C. TORRES, J. A. SILVA, G. T. S. T. GABRIEL FILHO, J. B. VICTÓRIA, H. F. V. KRAMBROCK, K. TEIXEIRA, I. F. RIBEIRO C.
Affiliation:	FEDERAL UNIVERSITY OF SÃO CARLOS FEDERAL UNIVERSITY OF SÃO CARLOS JULIANA A. TORRES GELSON T.S.T. DA SILVA, UNIVERSIDADE FEDERAL DE SÃO CARLOS - UFSCAR FEDERAL UNIVERSITY OF MINAS GERAIS (UFMG) FEDERAL UNIVERSITY OF MINAS GERAIS (UFMG) FEDERAL UNIVERSITY OF MINAS GERAIS (UFMG) IVO FREITAS TEIXEIRA, UNIVERSIDADE DE SÃO PAULO, USP CAUE RIBEIRO DE OLIVEIRA, CNPDIA.
Date Issued:	2024
Citation:	ACS Applied Materials & Interfaces, v. 16, 2024.
Pages:	41973−41985
Description:	ABSTRACT: Methane conversion to valuable chemicals is a highly challenging and desirable reaction. Photocatalysis is a clean pathway to drive this chemical reaction, avoiding the high temperature and pressure of the syngas process. Titanium dioxide, being the most used photocatalyst, presents challenges in controlling the oxidation process, which is believed to depend on the metal sites on its surface that function as heterojunctions. Herein, we supported different metals on TiO2 and evaluated their activity in methane photooxidation reactions. We showed that Ni−TiO2 is the best photocatalyst for selective methane conversion, producing impressively high amounts of methanol (1.600 μmol·g−1 ) using H2O2 as an oxidant, with minimal CO2 evolution. This performance is attributed to the high efficiency of nickel species to produce hydroxyl radicals and enhance H2O2 utilization as well as to induce carrier traps (Ti3+ and SETOVs sites) on TiO2, which are crucial for C−H activation. This study sheds light on the role of catalyst structure in the proper control of CH4 photoconversion.
Keywords:	Methane oxidation Selective oxidation
DOI:	https://doi.org/10.1021/acsami.4c02862
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPDIA)