(1. 浙江工業(yè)大學(xué)化學(xué)工程學(xué)院，杭州310032；
2. 浙江工業(yè)大學(xué)綠色化學(xué)合成技術(shù)國家重點(diǎn)實(shí)驗(yàn)室培育基地，杭州310032)
摘 要: 以鎢酸鈉為前驅(qū)體，通過水熱自組裝合成鎢酸納米片，再將其在氫氣/甲烷混合氣氛中還原碳化獲得碳化鎢納米片。采用場發(fā)射掃描電子顯微鏡、X射線衍射、透射電子顯微鏡和氮吸附等手段對樣品形貌、晶相、微結(jié)構(gòu)和比表面積進(jìn)行分析與表征；采用粉末微電極和循環(huán)伏安法測試樣品的電催化性能。結(jié)果表明：樣品顆粒為方形片狀，長和寬為600~800 nm，厚約90 nm；樣品由碳化鎢和碳化二鎢組成；納米片由納米顆粒和孔隙構(gòu)成；樣品的比表面積為31 m2/g，平均孔徑為3.5 nm；碳化鎢納米片呈介孔結(jié)構(gòu)，碳化鎢納米片對甲醇電催化氧化具有良好的活性，并具有與鉑類似的催化性能。
關(guān)鍵字: 碳化鎢；納米片；介孔；電催化性能；類鉑性能
（1. School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China;
2. State Key Laboratory of Breeding Base of Green Chemistry Synthesis Technology,
Zhejiang University of Technology, Hangzhou 310032, China）
Abstract:Tungsten trioxide nanoplate was prepared by hydrothermal self-assembling method using sodium tungstate as precursor, then the nanoplate was reduced and carbonized under H2 and CH4 atmosphere to get tungsten carbide nanoplate. The morphology, crystal phase, microstructure and specific area of the samples were characterized by scanning electron microscopy, X-ray diffractometry, transmission electron microscopy and Brunauer–Emmett–Teller surface tester. The electrocatalytic property of the nanoplate was measured through power microelectrode approach with cyclic voltammetry using a three-electrode system in acidic aqueous solution. The results show that the morphology of the sample is regular square plate, with length and width of 600-800 nm and thickness of around 90 nm, respectively; the crystal phase of the sample is composed of monotungsten carbide and bitungsten carbide; the nanoplate constitutes of nanoparticles and pores; the specific area of the sample is 31 m2/g, and the average diameter of the pore is around 3.5 nm. The nanoplate with mesoporosity is active to methanol electrocatalytic oxidation, and its electrocatalytic property is similar to that of platinum.
Key words: tungsten carbide; nanoplate; mesoporosity; electrocatalytic property; platinum similarity
