Tuning the morphology to enhance the catalytic activity of α-Ag₂WO₄ through V-doping

Author(s):Show less -

Patrocinio, Katiana Lima ; Santos, Jeziel Rodrigues ; Granone, Luis Ignacio ; Ponce, Miguel Adolfo ; Churio, Maria Sandra ; Ribeiro, Lara Kelly ; Teodoro, Marcio Daldin ; Llusar, Rosa ; Andres, Juan ; Longo, Elson ; Assis, Marcelo

• Document type: Journal article
• Source: DALTON TRANSACTIONS; v. 52, n. 41, p. 13-pg., 2023-10-24.

Abstract

Here, we present the synthesis of a highly efficient V-doped alpha-Ag2WO4 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 (O-1(2)) in the catalytic mechanism. Based on the experimental and theoretical results, the higher activity of the V-doped alpha-Ag2WO4 samples was associated with the preferential formation of the (100) surface in the catalyst morphology. (AU)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC