CO tolerance electrocatalyst of PtRu-H_xMeO_3/C (Me = W, Mo) made by composite support method

摘要

CO tolerance electrocatalyst of PtRu-H_xMeO_3/C is prepared by a composite support method, which overcomes evident shortcomings of other preparing methods. According to the result of XRD and TEM, the catalyst shows high dispersion and the H_xMeO_3 exists in amorphous form. The electrooxidations of CO on the catalysts have been investigated in cyclic voltammetry, in which PtRu-H_xMeO_3/C shows lower CO ignition potential according to hydrogen and CO spill over effects, and the bifunctional mechanism is proved to be strengthened for the involvement of H_xMeO_3. The CO tolerances of catalysts are compared according to the PEMFC single cell performance and anode polarization curves operated with H_2/50 ppm CO and H_2/100 ppm CO.