Abstract: By using ammonium metatungstate（AMT）which was treated by spay drying as precursors，two different hollow global tungsten carbide（WC）catalysts with meso-porosity were prepared by the gas-solid reaction in the atmosphere of CH₄/H₂ and CO/CO₂ respectively.Tungsten carbide powder microelectrodes（WC-PMEs）were prepared from the above WC powders.The electrochemical reduction behavior of α-nitronaphthalene（NP）on the WC-PME was investigated by using the electrochemical techniques of cyclic voltammetry and linear sweep voltammetry.The result showed that the powder microelectrode with WC prepared in the CH₄/H₂ atmosphere showed better catalytic activity for α-nitronaphthalene electrochemical reduction.This result was mainly attributed to different post treatments and surface morphological structures of two types of WC powders.Moreover，the WC-PME with WC prepared in the CH₄/H₂ atmosphere showed good chemical stability.

摘要： 以喷雾干燥处理的偏钨酸铵为前驱体，分别采用CH₄/H₂和CO/CO₂为还原碳化气氛，利用固定床气固反应法制备了两种具有介孔结构的碳化钨（WC）粉体.以WC粉末作为电催化材料制成了碳化钨粉末微电极（WC-PME），并采用循环伏安和线性扫描等方法研究了酸性溶液中两种介孔结构WC对α-硝基萘（NP）电还原过程中的电催化行为.结果表明，以CH₄/H₂为还原碳化气氛所制备的WC粉末，其制成的粉末微电极对NP具有更良好的电催化活性，这主要与该WC粉末的结构形貌及其制备后的处理工艺有关，同时该WC-PME具有良好的化学稳定性.