Noble metal (e.g., Pd, Ru, Rh)-based heterogeneous catalysis has emerged as a promising water treatment strategy for reductively destruction of a broad suite of waterborne contaminants. Oxyanions (e.g., BrO3-, ClO3-, etc.) are ubiquitous drinking water contaminants originating from both anthropogenic and natural sources or generated during water treatment processes, and their presence may pose a threat to human health at even low concentrations. However, limited efforts have been devoted to investigating the application of bimetallic noble metal-based catalysts for the treatment of oxyanions. In the present work, nanostructured bimetallic catalysts were developed by decorating monometallic noble metal-based catalysts with a secondary promoter metal (e.g., Re, In) on functionalized mesoporous silica supports. The as-synthesized catalysts were extensively characterized for surface area, pore structure, charge, functionality, morphology, and metal dispersion. The impacts of noble metal type, secondary promoter type, and modified functional group on the performance of the bimetallic catalysts were investigated. Results showed that the bimetallic catalysts exhibit improved activity and considerable reusability for destruction of oxyanions in various water matrices. This presentation will focus on material synthesis, characterization, and activity evaluation under different environmental conditions.

Application of nanostructured bimetallic catalyst for oxyanion reduction

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.