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Carbon dioxide transformation to fuels or chemicals provides an attractive approach for its utilization as feedstock and its emission reduction.Herein, we report a gas-phase electrocatalytic reduction of CO_2 in an electrolytic cell, constructed using phosphoric acid-doped polybenzimidazole(PBI) membrane, which allowed operation at 170°C. Pt/C and Pt Mo/C with variable ratio of Pt/Mo were studied as the cathode catalysts. The results showed that Pt Mo/C catalysts significantly enhanced CO formation and inhibited CH_4 formation compared with Pt/C catalyst. Characterization by X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy revealed that most Mo species existed as MoO_3 in Pt Mo/C catalysts and the interaction between Pt and MoO_x was likely responsible for the enhanced CO formation rate although these bicomponent catalysts in general had a larger particle size than Pt/C catalyst.
Carbon dioxide transformation to fuels or chemicals provides an attractive approach for its utilization as feedstock and its emission reduction. Herein, we report a gas-phase electrocatalytic reduction of CO_2 in an electrolytic cell, constructed using phosphoric acid-doped polybenzimidazole (PBI) membrane, which allowed operation at 170 ° C. Pt / C and Pt Mo / C with variable ratio of Pt / Mo were studied as the cathode catalysts. The results showed that Pt Mo / C interests significantly enhanced CO formation and inhibited CH_4 formation compared with Pt / C catalyst. Characterization by X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy revealed that most Mo species existed as MoO 3 in Pt Mo / C catalysts and the interaction between Pt and MoO x was likely responsible for the enhanced CO formation rate Although these bicomponent catalysts in general had a larger particle size than Pt / C catalyst.