论文部分内容阅读
采用沉淀法制备甲醇氧化电催化剂10%Nb2O5·nH2O-20%Pt/C,并在Ar气氛下对它进行热处理。用XRD和HRTEM研究热处理对10%Nb2O5·nH2O-20%Pt/C结构和形貌的影响,用循环伏安法和计时电流法研究热处理对10%Nb2O5·nH2O-20%Pt/C电化学性能的影响。结果表明:随着热处理温度的升高,催化剂Pt尺寸增大、活性提高;与无热处理的20%Pt/C相比较,700℃热处理的10%Nb2O5·nH2O-20%Pt/C对甲醇的催化氧化性能最好,它对甲醇氧化的起始电位降低了150mV,对甲醇的氧化峰电流提高了2.48倍。
Methanol oxidation electrocatalyst 10% Nb2O5 · nH2O-20% Pt / C was prepared by precipitation method and was heat-treated in Ar atmosphere. The effects of heat treatment on the structure and morphology of 10% Nb2O5 · nH2O-20% Pt / C were investigated by XRD and HRTEM. The effects of heat treatment on the structure of 10% Nb2O5 · nH2O-20% Pt / C were investigated by cyclic voltammetry and chronoamperometry The impact of performance. The results show that the size of Pt increases and the activity increases with the increase of the heat treatment temperature. Compared with the untreated 20% Pt / C, the heat treatment of 700 ℃ 10% Nb2O5 · nH2O-20% Pt / The catalytic oxidation performance is the best, which reduces the initial potential of methanol oxidation by 150mV and the oxidation peak current of methanol by 2.48 times.