A General Method to Construct Single-Atom Catalysts Supported on N-doped Graphene for Energy Applications
JOURNAL OF MATERIALS CHEMISTRY A(2020)
摘要
Single atom catalysts (SACs) with atomically dispersed catalytic sites have shown great promise for energy related chemical reactions. In this work, a facile and general approach to synthesize a large variety of transition metal (Fe, Ni, Co, Cu, etc.) SACs with a large surface area and a hierarchical structure using layered montmorillonite (MMT) as the structural template was developed. Specifically, the as-synthesized nickel SAC (Ni-SAC) exhibits outstanding performance toward electrochemical CO2 reduction, achieving CO2-to-CO conversion with more than 90% faradaic efficiency in the potential range from -0.6 to -1.1 V vs. RHE, and the iron SAC (Fe-SAC) displays excellent ORR activity, with the half-wave potential surpassing that of the state-of-the-art Pt/C catalyst.
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