As a potent thyroidal endocrine disruptor, perchlorate (ClO4-) has been listed as a drinking water contaminant by the U.S. EPA since February 2011. Recently a heterogeneous Re-Pd/C catalyst (with immobilized Re complex coordinated with oxazolinyl-phenolato bidentate ligands) has shown a high activity of aqueous perchlorate reduction. However, synthesis of the precursor complex suffered from poor stereoisomer selectivity, and the immobilized Re complex was susceptible to decomposition while treating concentrated perchlorate. We have further modified the bidentate ligand structure to further enhance ClO4- reduction activity and catalyst stability simultaneously. NMR spectroscopy and single crystal XRD have been conducted to characterize the structure of Re precursor complexes. The new catalysts not only showed high reactivity but also resisted decomposition during the treatment of concentrated perchlorate at ambient conditions.

Improving activity and stability of perchlorate reduction catalyst with rational ligand design for the rhenium complex reaction site

255th National Meeting (2018)

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