Effect on Hydrogen Evolution Properties of PtCuLaO_x Membrane Electrode by Oxygen flow and Acid treatment

摘要

In order to reduce production cost of making H_2, one of the key points was to reduce Pt loading in Pt/C catalytic electrode. In our study, a new type of Pt/C membrane electrodes, PtCuLaO_x/C heterogeneous structure, in which with developing different flow of O_2, on the surface of carbonaceous substrates were manufactured by Ion Beam Sputtering (IBS) technology. These membrane electrodes were treated by annealing in vacuum furnace, and by different time in different concentration H_2SO_4 solution. The hydrogen evolution properties of these electrodes were tested by tri-electrode system, and were calculated results of their exchange current density (I_0), decomposition voltage (E_d) and active specific surface area (ESA). It was found that PtCuLaO_x heterogeneous membrane electrodes with Pt loading less than 0.041mg·cm~(-2) (the electrode area) undergone treatment, whose E_d, I_0 and ESA was -0.223(V vs SCE), 4.562mA·cm~(-2) and 46.2811m~2·g~(-1) respectively in balanced condition.