利用改性炭黑、乙酸钴、醋酸镍为原料,通过乙二醇还原法制得CoNi/C,再以CoNi/C、H₂PtCl₆·6H₂O为原料通过乙二醇还原法制得PtCoNi/C合金纳米催化剂,通过红外光谱仪、透射电镜、X射线光电子能谱仪和X射线衍射仪对CoNi/C、PtCoNi/C合金纳米催化剂进行表征,并通过电化学工作站对催化剂的甲醇电催化氧化性能进行了测试。结果表明:采用改性炭黑粉末作为载体时,制得的PtCoNi/C合金纳米催化剂中纳米粒子在炭黑表面分散均匀。PtCoNi/C合金纳米催化剂对应的甲醇氧化峰电位为-0.895V,该催化剂具有更高的甲醇催化氧化活性;PtCoNi/C合金纳米催化剂的I_f/I_b=-1.36,其抗CO中毒能力较强,且稳定性高。

In this study,CoNi/C was prepared from modified carbon black powder and cobalt acetate by ethylene glycol reduction method.Then,PtCoNi/C and H₂PtCl₆·6H₂O were used as raw materials to obtain PtCoNi/C alloy nano-catalyst by same method.The nanocrystallized catalysts of CoNi/C and PtCoNi/C alloy were characterized by infrared spectroscopy,TEM and XRD.The electrocatalytic oxidation performance of the catalysts was tested by electrochemical workstation.The results showed that the nanoparticles in the prepared PtCoNi/C catalyst were uniformly dispersed on the surface of carbon black when using modified carbon black powder as the support.The electrochemical test results exhited that the methanol oxidation peak potential corresponding to the PtCoNi/C alloy nano-catalyst was -0.895V,which indicated that the catalyst possessed higher methanol catalytic oxidation activity.I_f/I_b of PtCoNi/C alloy nano-catalyst was -1.36,which demonstrated that the catalyst had strong resistance to CO poisoning and high stability.