Engineering high-performance electrocatalysts to improve the kinetics of parallel electrochemical reactions in low-temperature fuel cells, water splitting, and metal-air battery applications is important and inevitable. In this study, by employing a chemical co-reduction method, we developed multifunctional PtRh-CoO alloy with uniformly distributed ultrafine nanoparticles (2-3 nm), supported on carbon. The presence of CoO and the incorporation of Rh led to a strong electronic and ligand effect in the Pt lattice environment, which caused the d-band center of Pt to shift. This shift improved the electrocatalytic performance of PtRh-CoO alloy. When PtRh-CoO/C was used to catalyze the oxygen reduction reaction (E: 0.75 V), oxygen evolution reaction (η: 290 mV), and hydrogen evolution reaction (η: 55 mV), it showed greater endurance (mass activity loss of only 7%-17%) than Pt-CoO/C and Pt/C catalysts up to 5000 potential cycles in perchloric acid. Overall, the as-prepared PtRh-CoO/C showed high multifunctional electrocatalytic potency, as demonstrated by typical electrochemical studies, and its physicochemical properties endorse their extended performance for a wide range of energy storage and conversion applications.
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| http://dx.doi.org/10.1016/j.envres.2023.115950 | DOI Listing |
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