Abstract
Three-dimensional networks composed of one-dimensional nanomaterials are widely used in electrocatalysis owing to their high charge transfer efficiencies. In this study, we report a hydrothermal lysine-assisted route for the synthesis of the Pd nanochain networks (Pd NCNs). In addition, we demonstrate the application of Pd NCNs in microbial fuel cells (MFCs), which represent a promising technology for wastewater treatment that also directly generates electrical energy. The Pd NCNs exhibit superior activity for the oxygen reduction reaction under neutral conditions because of their unique structure and down-shifted Pd d-band center, as compared with the commercial Pd black catalyst. The maximum power density generated in a membraneless single chamber MFC operating on wastewater with the as-prepared Pd NCNs as cathode catalysts is ~14.10 W m−3 or 563.99 mW m−2, which remains stable for over 100 days, clearly demonstrating the potential application of Pd NCNs in MFCs.
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