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以浓硝酸处理后的多壁碳纳米管(MWCNTs)为载体,采用水热法,用硼氢化钠还原Pd~2+-EDTA络合物,制得MWCNT负载的纳米钯催化剂(Pd/MWCNT).扫描电子显微镜(SEM)显示,纳米钯颗粒形成三维立体网状结构.利用循环伏安(CV)和计时电流法(CA)法,研究了碱性溶液中Pd/MWCNT催化剂对乙醇氧化的电活性.结果表明,与晶体Pd电极相比,Pd/MWCNT电极对乙醇的电化学氧化具有较高的催化活性,表现为较高的阳极氧化峰电流和强的抗毒化能力.通过不同电位范围、不同扫速以及不同乙醇浓度的CV研究,探讨了乙醇在Pd电极上的催化氧化机理和动力学特征.
The MWCNT supported Pd / MWCNTs were prepared by the hydrothermal method using sodium bicarbonate-treated MWCNTs as the support, and the Pd ~ 2 + -EDTA complex was reduced with sodium borohydride. Scanning electron microscopy (SEM) showed that the nano-Pd particles formed a three-dimensional network structure.The electrochemical oxidation of ethanol by Pd / MWCNT catalyst in alkaline solution was studied by cyclic voltammetry (CV) and chronoamperometry Activity.The results showed that the Pd / MWCNT electrode exhibited higher catalytic activity for the electrochemical oxidation of ethanol compared with the Pd electrode, which showed higher anodic oxidation peak current and strong anti-poison ability.By different potential range, CV at different sweep rates and different concentrations of ethanol, and discussed the catalytic oxidation mechanism and kinetic characteristics of ethanol on Pd electrode.