用溶剂化金属原子浸渍法制备了不同金含量的高分散Au/TiO2催化剂.XRD和TEM测定结果表明,随着金含量的增加,金颗粒度增大,但直径都在1.8~3.5nm范围内.XPS研究表明金处于金属态.Au/TiO2在低温下就显示出较高的CO氧化活性,323 K时CO的转化率可达到100%.金颗粒度为1.8 nm的Au/TiO2催化剂活性最高.
参考文献
[1] | Bollinger M A;Vannice M A .[J].Applied Catalysis B:Environmental,1996,8(04):417. |
[2] | Yuan YZ.;Asakura K.;Wan HL.;Tsai K.;Iwasawa Y.;Kozlova AP. .SUPPORTED AU CATALYSTS PREPARED FROM AU PHOSPHINE COMPLEXES AND AS-PRECIPITATED METAL HYDROXIDES - CHARACTERIZATION AND LOW-TEMPERATURE CO OXIDATION[J].Journal of Catalysis,1997(1):191-199. |
[3] | Valden M.;Lai X.;Goodman DW.;Pak S. .Structure sensitivity of CO oxidation over model Au/TiO2 catalysts[J].Catalysis Letters,1998(1):7-10. |
[4] | Haruta M .[J].Catalysis Today,1997,36(01):153. |
[5] | 吴世华;杨树军;王序昆 .[J].催化学报,1989,10(03):313. |
[6] | 吴世华.[J].化学通报(印刷版),1989(08):40. |
[7] | Briggs D;Seah M P.Practical Surface Analysis by Auger and X-Ray Photoelectron Spectroscopy[M].Chichester:Wiley,1983:72. |
[8] | Shirley DA .[J].Physical Review B,1972,5(12):4709. |
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