以WO3为前驱体考察了CH4/H2混合气氛下程序升温反应制备碳化钨的晶相转变过程,比较了不同晶相碳化钨催化剂的肼分解活性,并以CO为探针分子采用微量吸附量热技术研究了碳化钨晶相转变过程中催化剂的表面活性位. 结果表明,随W2C晶相的生成,催化剂对CO的吸附活化能力逐渐增强,纯相W2C表现有最好的肼分解活性. 当制备温度高于750 ℃时,样品表面形成的积炭抑制了碳化钨的催化性能. 表面洁净的WC在肼分解反应中具有优于W2C的类贵金属催化特性.
参考文献
| [1] | Schmit E W.Hydrazine and Its Derivatives:Preparation,Properties,Applications[M].New York:John Wiley and Sons,Inc,2001:1267. |
| [2] | Armstrong W E;Ryland L B;Voge H H .[P].US 4124538,1978. |
| [3] | 赵许群,张涛,孙孝英,关文.肼分解催化剂的表征及失活机理研究[J].催化学报,2000(06):594-596. |
| [4] | Taylor W F;Liaberman M;Cohen M S.Development of a Low Cost Catalyst for Hydrazine[J].Quarterly Progress Reports,1968(02) |
| [5] | 李令成,蓝蕴基.肼化解催化剂进展[J].工业催化,1994(01):3. |
| [6] | Santos J B O;Valenca G P;Rodrigues J A J .[J].Journal of Catalysis,2002,210(01):1. |
| [7] | Zheng M Y;Chen X W;Cheng R H;Sun J Wang X D Zhang T .[J].Catalysis Communications,2006,7(03):187. |
| [8] | Cheng R H;Shu Y Y;Zheng M Y;Li L Sun J Wang X D Zhang T .[J].Journal of Catalysis,2007,249(02):397. |
| [9] | Oyama S T .[J].Catalysis Today,1992,15(02):179. |
| [10] | Wu Z L;Li C;Ying P L;Wei Zh B Xin Q.[J].Chemical Communications,2001(08):701. |
| [11] | Furimsky E .[J].Applied Catalysis A:General,2003,240(1-2):1. |
| [12] | Wu W Ch;Wu Z L;Feng Zh Ch;Ying P L Li C .[J].Physical Chemistry Chemical Physics,2004,6(24):5596. |
| [13] | Rodrigues J A J;Cruz G M;Bugli G;Boudart M Djega-Mariadassou G .[J].Catalysis Letters,1997,45(1-2):1. |
| [14] | Brayner R;Djega-Mariadassou G;Cruz G M;Rodrigues J A J .[J].Catalysis Today,2000,57(3-4):225. |
| [15] | Chen X W;Zhang T;Xia L G;Li T Zheng M Y Wu Z L Wang X D Wei Zh B Xin Q Li C .[J].Catalysis Letters,2002,79(1-4):21. |
| [16] | Chen X W;Zhang T;Ying P L;Zheng M Y Wu W Ch Xia L G Li T Wang X D Li C.[J].Chemical Communications,2002(03):288. |
| [17] | Sun J;Zheng M Y;Wang X D;Wang A Q Li T Zhang T .[J].Catalysis Letters,2008,123(1-2):150. |
| [18] | Chen X W;Zhang T;Zheng M Y;Wu Z L Wu W Ch Li C .[J].Journal of Catalysis,2004,224(02):473. |
| [19] | 李林,王晓东,沈俭一,周立幸,张涛.高灵敏宽温区吸附热测定装置的建立[J].催化学报,2003(11):872-876. |
| [20] | Xiao T C;Hanif A;York A P E;Sloan J Green M L H .[J].Physical Chemistry Chemical Physics,2002,4(14):3522. |
| [21] | Giraudon J M;Devassine P;Lamonier J F;Delannoy L Leclercq L Leclercq G .[J].Journal of Solid State Chemistry,2000,154(02):412. |
| [22] | Volpe L;Boudart M .[J].Journal of Solid State Chemistry,1985,59(03):348. |
| [23] | Ribeiro F H;Dalla Betta R A;Boudart M;Baumgartner J Iglesia E .[J].Journal of Catalysis,1991,130(01):86. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%