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以阳极氧化处理的碳布(ACC)为导电基体,利用Cu的欠电位沉积(UPD)和Cu与Pt金属前驱体之间的置换反应制备了Pt/碳布(Pt/ACC)电极材料,对其微观结构进行了表征并考察了其电催化分解水制氢性能。结果表明,通过控制Cu的沉积电位可以有效地控制Pt的负载量和其在ACC表面的分散状态。随着沉积电位在0.32~0.15 V vs.RHE变化,Pt/ACC电极材料中Pt的负载量呈线性增加;在0.5 mol/L H2SO4溶液中的产氢反应结果表明,随着Pt负载量的增加,析氢起始电位逐渐降低,当沉积电位为0.15 V vs.RHE时,Pt在ACC表面的负载量为588μg/cm2,所得Pt/ACC电极材料起始电位为-0.05 V vs.RHE,且达到10 m A/cm2电流密度所需的过电位仅为56 m V,Tafel斜率为34.2 m V/dec,电极的催化产氢活性与块体Pt箔相近。
Anodic oxidation treatment of carbon cloth (ACC) as the conductive matrix, the use of Cu underpotential deposition (UPD) and Cu and Pt metal precursor exchange reaction between the prepared Pt / carbon cloth (Pt / ACC) electrode material, Its microstructure was characterized and its properties of electrocatalytic decomposition of water to hydrogen were investigated. The results show that by controlling the deposition potential of Cu, the loading of Pt and its dispersion on the surface of ACC can be effectively controlled. With the deposition potential varying from 0.32 to 0.15 V vs. RHE, the loading of Pt in Pt / ACC electrode material increases linearly. The hydrogen production in 0.5 mol / L H2SO4 solution shows that with the increase of Pt loading , The initial potential of hydrogen evolution decreases gradually. When the deposition potential is 0.15 V vs. RHE, the Pt loading on the ACC surface is 588 μg / cm 2, and the initial potential of the resulting Pt / ACC electrode material is -0.05 V vs. RHE and reaches The current density required for 10 m A / cm2 current density was only 56 mV and the Tafel slope was 34.2 mV / dec. The catalytic hydrogen production activity of the electrode was similar to that of bulk Pt foil.