Tuning the morphology to enhance the catalytic activity of α-Ag 2 WO 4 through V-doping

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 52; no. 41; pp. 14982 - 14994
• Main Authors: Patrocinio, Katiana Lima, Santos, Jeziel Rodrigues, Granone, Luis Ignacio, Ponce, Miguel Adolfo, Churio, Maria Sandra, Ribeiro, Lara Kelly, Teodoro, Marcio Daldin, Llusar, Rosa, Andrés, Juan, Longo, Elson, Assis, Marcelo
• Format: Journal Article
• Language: English
• Published: 24.10.2023
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/D3DT02352D

Here, we present the synthesis of a highly efficient V-doped α-Ag 2 WO 4 catalyst for the oxidation of sulfides to sulfones, exhibiting a high degree of tolerance towards various sensitive functional groups. Remarkably, the catalysts with 0.01% V-doping content exhibited outstanding selectivity towards the oxidation process. Scavenger experiments indicated the direct involvement of electron–hole (e − /h + ) pairs, hydroxyl radical (˙OH), and singlet oxygen ( 1 O 2 ) in the catalytic mechanism. Based on the experimental and theoretical results, the higher activity of the V-doped α-Ag 2 WO 4 samples was associated with the preferential formation of the (100) surface in the catalyst morphology.