采用化学镀在膨胀石墨上制备Pd-Co催化剂,用扫描电镜(SEM)、透射电镜(TEM)、能谱仪(EDS)、X射线衍射仪(XRD)和电化学工作站等分析了催化剂的显微组织结构及电催化性能,并探讨了酸性介质浓度对Pd-Co/膨胀石墨电极的电催化影响.结果表明,催化层中Pd、Co纳米颗粒均匀地存在于膨胀石墨电极表面及其孔隙中;溶液电阻(Rs)和电荷转移电阻(Rct)因电解质溶液硫酸浓度的上升而递减,Pd-Co/膨胀石墨电极对甲醇电催化产生的峰值电流及稳态电流分别提升到2.59倍和3.02倍,峰值电位右移了39 mV,峰值电流随电极扫描周数增加而急剧上升,6周后趋于稳定.
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