Synergistic promotion of proton relay and *CO hydrogenation in Cu-Zn tandem catalysts for highly efficient electrocatalytic CO2-to-CH4 conversion (IMAGE)
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CuZn800@C was constructed via solvothermal method and utilizes the high-temperature volatility of zinc to prepare through calcination at different temperatures, which displays a high methane Faradaic efficiency of 64.5% and a remarkable partial current density of -551.3 mA/cm2 at -1.7 V vs. RHE, along with excellent stability. Zn and Cu form a tandem reaction system. Zn sites promote water splitting to provide protons, while Cu sites reduce the energy barrier for *CO hydrogenation. Moreover, Zn and Cu can constitute dual active sites that enhance CO2 adsorption, thereby boosting subsequent reactions.
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Nano Research, Tsinghua University Press
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