Abstract:

Using ammonium metatangstate（AMT） treated by spay drying as precursors，tungsten carbides（WC） sample with meso-porosity were synthesized by gas-solid reaction in the atmosphere of CO/CO₂ at 800℃Pt/WC prepared by vapor phase deoxidation method was applied in catalytic electrode for nitrobenzene（NB） electro-reduction reactionXRD and SEM revealed that Pt particles were dispersed on the WCCyclic voltammetry（CV） data were collected by three-electrode systemthe electrochemical behavior of nitrobenzene was studied by means of cyclic voltammetry with Pt/WC-PME as working electrodeThe results showed that the Pt/WC-PME exhibited an attractive catalytic activity and stability in NB electro-reduction.

Key words:

碳化钨, 铂, 硝基苯, 电催化

摘要：

以偏钨酸铵（AMT）为钨源前驱体，气流式喷雾干燥仪造粒，得到空心球状结构偏钨酸铵，固定床气固反应，以CO/CO₂为还原碳化气氛在800℃下制备了介孔空心球状碳化钨。采用氯铂酸作为铂源，用浸渍、气相还原法制备了Pt/WC粉末催化剂。通过XRD和SEM测试手段对Pt/WC粉末样品进行了表征，表明Pt成功负载在介孔WC材料上。采用循环伏安法、以Pt/WC粉末微电极为工作电极，研究了Pt/WC对在质子惰性介质中硝基苯的硝基还原的催化作用。结果表明，Pt/WC催化剂对硝基还原有着良好的电催化活性和化学稳定性。

关键词:

碳化钨, 铂, 硝基苯, 电催化