采用共沉淀法、沉积-沉淀法和改性沉积-沉淀法制备了Au/Fe2O3催化剂,运用N2吸附、X射线衍射、X射线光电子能谱和透射电镜等技术对其进行了表征,考察了制备方法对Au/Fe2O3催化剂水煤气变换反应催化活性的影响.结果表明,改性沉积-沉淀法制备的催化剂具有最好的催化活性,150 ℃时CO转化率达82.3%.该催化剂比表面积较大,金粒子尺寸(3~5 nm)较小且分布均匀.载体氧化铁以无定形态和结晶态共存,金与载体间存在较强的相互作用,这对催化剂活性的提高起着重要作用.
参考文献
[1] | Andreeva D;Idakiev V;Tabakova T;Andreev A Giovanoli R .[J].Applied Catalysis A:General,1996,134(02):275. |
[2] | 王东辉,郝郑平,程代云,史喜成.金催化剂的研究进展及在环保催化中的应用[J].自然科学进展,2002(08):794-799. |
[3] | Liu Z M;Vannice M A .[J].Catalysis Letters,1997,43(1-2):51. |
[4] | Haruta M;Yamada N;Kobayashi T;Lijima S .[J].Journal of Catalysis,1989,115(02):301. |
[5] | Tabakova T;Idakiev V;Andreeva D;Mitov I .[J].Applied Catalysis A:General,2000,202(01):91. |
[6] | 陈葳,肖益鸿,詹瑛瑛,蔡国辉,林性贻,魏可镁,郑起.微乳法制备Au/Fe2O3水煤气变换反应催化剂Ⅰ. 制备参数对催化剂活性的影响[J].催化学报,2003(11):867-871. |
[7] | Andreeva D;Tabakova T;Idakiev V;Christov P Giovanoli R .[J].Applied Catalysis A:General,1998,169(01):9. |
[8] | 王桂英,余加佑,廉红蕾,李雪梅,贾明君,张文祥,吴通好,葛炎东.常温常湿CO氧化催化剂Au/Fe2O3的制备与稳定性研究[J].高等学校化学学报,2000(05):752-755. |
[9] | 华金铭,郑起,林性贻,魏可镁.制备参数对Au/Fe2O3催化剂水煤气变换性能的影响[J].催化学报,2003(12):957-963. |
[10] | Moulder J F;Stickle W F;Sobol P E;Bowman K D.Handbook of X-Ray Photo-electron Spectroscopy[M].Eden Prairie,Minnesota:Physical Electronics Inc,1995:182. |
[11] | Rao C N R;Vijayakrishnan V;Aiyer H N;Kulkarni G U Subbanna G N .[J].Journal of Physical Chemistry,1993,97(43):11157. |
[12] | Wang CT;Ro SH .Surface nature of nanoparticle gold/iron oxide aerogel catalysts[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2006(1):35-43. |
[13] | Hao Zh P;An L D;Wang H L;Hu T D .[J].Reaction Kinetics and Catalysis Letters,2000,70(01):153. |
[14] | Weckhuysen BM.;Rosynek MP.;Lunsford JH.;Wang DJ. .Conversion of methane to benzene over transition metal ion ZSM-5 zeolites - II. Catalyst characterization by x-ray photoelectron spectroscopy[J].Journal of Catalysis,1998(2):347-351. |
[15] | Lin T C;Seshadri G;Kelber J A .[J].Applied Surface Science,1997,119(1-2):83. |
[16] | Fujii T.;Sawatzky GA.;Voogt FC.;Hibma T.;Okada K.;de Groot FMF. .In situ XPS analysis of various iron oxide films grown by NO2-assisted molecular-beam epitaxy[J].Physical Review.B.Condensed Matter,1999(4):3195-3202. |
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