Abstract
In order to reduce production cost of making H2, 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, PtCu-LaOx/C (abbr. PCL) and LaOx-PtCu/C (abbr. LPC) double-layer structure, in which Pt nanometer particles homogeneously dispersed on the surface of carbonaceous substrates were manufactured by Ion Beam Sputtering (IBS) technology. The hydrogen evolution polarization curves of these double-layer membrane electrodes were tested by three-electrode system, and the optimal sample was selected by the calculation results of their exchange current density (i0) and decomposition voltage (Ed). It was found that PCL with Pt loading less than 0.05mg/cm2 (the electrode area) whose decomposition voltage and exchange current density was -0.204(V vs SCE) and 147.0μA/cm2 respectively in balanced condition.
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