Abstract
The development of high-performance ORR catalysts that satisfy the requirements of low Pt content, high activity, and long-term durability is crucial. The adequately designed Pt3Ni1/N-rGO electrode, which was obtained by the regular dispersion and growth of uniform ≤ 5.0-nm-sized Pt3Ni1 alloy nanoparticles on an N-rGO support electrode by the solvothermal method, exhibited improved mass activity and specific surface activity (178% and 167%, respectively) compared to that of a commercial Pt/C electrode. The fabricated electrode showed almost unchanged ESCA and LSV polarization curves even after 5000 cyclic voltammetry tests. The Pt3Ni1/N-rGO electrode exhibited remarkable resistance to CO poisoning compared to that of the commercial Pt/C electrode. An electron-rich Pt–Ni–NC three-phase interface was created in the catalyst by introducing CN, which is more electron-rich than CC, to the rGO support, which increased its O2 gas-adsorption properties and provided adequate strength for OH group formation that eventually accelerated their conversion into H2O.
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