用Mg作还原剂,无水乙醇和WO3分别作为C源和W源,采用简单的溶剂热法合成了碳化钨(WC)纳米晶,并讨论了温度和时间对合成WC的影响,以及其形成的机理. 通过X射线衍射、透射电子显微镜、能量色散谱和电化学方法表征了WC的物相结构、表面形貌、化学组成和电化学性能. 结果表明,合成温度低至500 ℃时也能合成六方WC相. 生成C的量超过W的量,说明纯化后的产物由C和WC组成. WC的粒径大约在40～70 nm,分布于膜状碳上. 将溶剂热法制备出的WC加入Pt/C中,其协同催化氧还原效果非常明显,起峰电势比Pt/C催化剂正移了173 mV.
参考文献
| [1] | 赵新生,孙公权,陈维民,唐水花,辛勤,杨少华,衣宝廉.直接甲醇燃料电池Pt-Ru/C催化剂的稳定性[J].催化学报,2005(05):383-388. |
| [2] | Shukla A.K.;El-Khatib K.M.;Kim H.;Antonucci P.L.;Antonucci V.;Arico A.S. .X-ray photoelectron spectroscopic study on the effect of Ru and Sn additions to platinized carbons[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,1999(1/4):20-29. |
| [3] | 徐常威,田植群,沈培康.甘油和乙醇在Pt-CeO2/C电极上的氧化[J].电池,2004(03):212-214. |
| [4] | Léger J M .[J].Journal of Applied Electrochemistry,2001,31(07):767. |
| [5] | Raghuveer V;Viswanathan B .[J].FUEL,2002,81(17):2191. |
| [6] | Raghuveer V.;Xanthopoulos N.;Mathieu HJ.;Viswanathan B.;Thampi KR. .Rare earth cuprates as electrocatalysts for methanol oxidation[J].Solid state ionics,2001(3/4):263-274. |
| [7] | Ross P N;Stonehart P .[J].Journal of Catalysis,1975,39(02):298. |
| [8] | Sinfelt J H;Yates D J C .[J].National Physical Science,1971,229(01):27. |
| [9] | Ganesan R;Ham DJ;Lee JS .Platinized mesoporous tungsten carbide for electrochemical methanol oxidation[J].Electrochemistry communications,2007(10):2576-2579. |
| [10] | Ma Ch N;Sheng J F;Brandon N;Zhang Ch Li G H .[J].International Journal of Hydrogen Energy,2007,32(14):2824. |
| [11] | Santos J B O;Valenca G P;Rodrigues J A J .[J].Journal of Catalysis,2002,210(01):1. |
| [12] | Wu M;Shen P K;Wei Z D;Song Sh Q Nie M .[J].Journal of Power Sources,2007,166(02):310. |
| [13] | Houston J E;Laramore G E;Park R L .[J].Science,1974,185(4147):258. |
| [14] | Mclntyre D R;Burstein G T;Vossen A .[J].Journal of Power Sources,2002,107(01):67. |
| [15] | Papazov G;Nikolov I;Pavlov D;Vitanov T Andreev P Bojinov M .[J].Journal of Power Sources,1990,31(1-4):79. |
| [16] | Acres G J K;Frost J C;Hards G A;Potter R J Ralph T R Thompsett D Burstein G T Hutchings G J .[J].Catalysis Today,1997,38(04):393. |
| [17] | Costa D P;Lemberton J L;Potvin C;Manoli J M Perot G Breysse M Djega-Mariadassou G .[J].Catalysis Today,2001,65(2-4):195. |
| [18] | Li SZ.;Lee JS. .MOLYBDENUM NITRIDE AND CARBIDE PREPARED FROM HETEROPOLYACIDS .1. PREPARATION AND CHARACTERIZATION[J].Journal of Catalysis,1996(1):76-87. |
| [19] | Koc R.;Kodambaka S.K. .Tungsten carbide (WC) synthesis from novel precursors[J].Journal of the European Ceramic Society,2000(1):1859-1869. |
| [20] | Krishna B V;Gaganpreet K V;Bhunia H .[J].International Journal of Nanoscience,2002,1(02):139. |
| [21] | Guo Ch L;Liu Y;Ma X J;Qian Y T Xu L Q .[J].Chemistry Letters,2006,35(11):1210. |
| [22] | 刘沙,刘刚,杨贵彬,黄泽兰.碳化钨粉制备新技术[J].稀有金属与硬质合金,2005(01):29-32. |
| [23] | Pallone EMJA;Martin DR;Tomasi R;Botta WJ .Al2O3-WC synthesis by high-energy reactive milling[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1-2):47-51. |
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