The researchers found that ethane was electrocatalyzed to ethylene and protons (C2H6→ C2H4 + 2H+ + 2e-) at the anode, and the protons were "extracted" by electrolyte to the cathode to form hydrogen (2H+ + 2e-→ H2). When CO2 and proton react at the cathode, CO (CO2 + 2H+ + 2e-→ CO + H2O) is generated. CO2 is reduced to CO fuel, and the overpotential between the two electrodes is reduced, thus the dehydrogenation efficiency of ethane is greatly improved.
Electrochemical "extraction" of protons achieves efficient non-oxidative dehydrogenation of ethane to ethylene. At atmospheric pressure, 700℃ and 0.8 V, the conversion rate of ethane is up to 75.2%, the selectivity of ethylene is ～100%, and the performance of 100 hours of operation is not attenuating.
Besides, experimental and theoretical results revealed that by doping Nb1.33(Ti0.8Mn0.2)0.67O4-δ (NTMO) and riveting the growth nanometer NixCu1-x alloy on the surface in situ, and the metal-oxide interface system was constructed to enhance the electrocatalytic activity and carbon deposition resistance of ethane conversion.
This novel electrocatalytic process realized not only the non-oxidation dehydrogenation of ethane to ethylene, but also the reduction and high value utilization of CO2, which has economic and sustainable development potential. This study provides an efficient and reliable electrochemical method for the conversion of C2H6, and paves a new way for the conversion of other alkanes.
The research group led by Prof. DENG Dehui from the Dalian Institute of Chemical Physics reported a direct electrocatalytic process for highly selective ethylene production from CO reduction with water over Cu catalysts at room temperature and ambient pressure.
A research team led by Prof. PAN Xiulian and BAO Xinhe in Dalian Institute of Chemical Physics designed a new bifunctional catalyst, which could achieve the syngas conversion to ethylene with a high selectivity. Researchers focused on catalytic conversion of syngas to hig...
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