引用本文:
黄令, 许书楷, 汤皎宁, 杨防祖, 周绍民. Ni-Mo-PTFE复合电极的制备及其对甲醇电氧化的催化性能[J]. 应用化学,
1997, 14(4): 21-24.
Citation: Huang Ling, Xu Shukai, Tang Jiaoning, Yang Fangzhu, Zhou Shaomin. Ni-Mo-PTFE Electrode: Preparation and Catalytic Property on Electrooxidation of Methanol[J]. Chinese Journal of Applied Chemistry, 1997, 14(4): 21-24.
Citation: Huang Ling, Xu Shukai, Tang Jiaoning, Yang Fangzhu, Zhou Shaomin. Ni-Mo-PTFE Electrode: Preparation and Catalytic Property on Electrooxidation of Methanol[J]. Chinese Journal of Applied Chemistry, 1997, 14(4): 21-24.
Ni-Mo-PTFE复合电极的制备及其对甲醇电氧化的催化性能
摘要:
在0.22mol/L硫酸镍,0.06mol/L钼酸钠,0.3mol/L柠檬酸钠,30g/LPTFE乳液,0.1g/LFC-400表面活性剂的电解液(pH=9)中,于温度45℃,通以10mA/cm2的电流,在纯Cu片上沉积出Ni-Mo-PTFE复合沉积层,XRD、XPS表征结果表明,该复合沉积层属立方晶系,其点阵型式为面心点阵F,晶胞参数a为0.3573nm,镍钼合金为固溶体结构,其(111)织构度TC(111)为68%,表明该沉积层呈(111)择优取向.沉积层表面的氟以(CF2)n的形式存在,SEM观察结果表明沉积层含有PTFE时表面的粗糙度增大.镍-钼-PTFE复合电沉积过程经历吸附态物种氢氧化镍和钼的氧化物,它们继续捕获电子被还原为镍钼合金,PTFE粒子以包埋的形式沉积于镀层中.循环伏安结果表明该复合电极在NaOH溶液中对甲醇的电氧化具有催化活性.
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关键词:
- 镍-钼-PTFE复合电极
- / 制备
- / 甲醇
- / 电催化氧化
- / 电沉积机理
English
Ni-Mo-PTFE Electrode: Preparation and Catalytic Property on Electrooxidation of Methanol
Abstract:
Ni-Mo-PTFE composite electrode was obtained from a mixture containing 0.22 mol/L NiSO4·6H2O, 0.06 mol/L Na2MoO4·2H2O, 0.3 mol/L Na3C6H5O7·2H2O, 30 g/L PTFE and 0.1 g/L FC-400 surfactant (pH=9) in 45℃ with current density of 10 mA/cm2. XRD of the composite deposit reveals that it is a face centered cubic solid solution and exhibits (111) preferred orientation. X-ray photoelectron energy spectra of the composite deposit indicate that fluorine exists in form of (CF2)n. SEM showed the larger surface roughness of the electrode. The mechanism of Ni-Mo-PTFE composite electrodeposition has been discussed. The cyclic voltammetric study showed that the electrocatalytic activity of Ni-Mo-PTFE electrode on methanol oxidation is bigger than that of Ni-Mo electrode.
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Key words:
- Ni-Mo-PTFE composite electrode
- / preparation
- / methanol
- / electrodeposition
- / electrooxidation
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