采用溶胶凝胶法制备了碳载纳米双金属Ni-Pt (5%,质量分数)/C电催化剂,用TEM、XRD和XPS表征金属粒子的形貌、晶相结构、表面元素及其价态,循环伏安法测试催化剂在碱性溶液中电催化氧化甲醇的活性.结果表明,Ni-Pt金属粒子在碳载体上分布均匀,粒径为3~6 nm,少量Pt的掺杂对纳米Ni活性有明显提高,其中,合金型Ni-Pt(5%)/C在1.0 mol/L NaOH+ 1.0 mol/L CH3OH溶液中峰电流密度可达85.6 mA/mg,是Ni/C峰电流密度的8.7倍,达到Pt/C峰电流密度的15.3%.单位质量铂的电流显著提高.
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