利用程序升温反应谱、X射线光电子能谱和高分辨电子能量损失谱研究了NO在清洁和预吸附氧的Pt(110)表面的吸附和分解. 在清洁的Pt(110)表面,室温下低覆盖度时NO以桥式吸附为主,高覆盖度时NO以线式吸附为主. 加热过程中部分NO(主要是桥式吸附物种)分解,生成N2和N2O. 室温下O2在Pt(110)表面发生解离吸附. Pt(110)表面预吸附氧会抑制桥式吸附NO的生成,并导致其脱附温度降低40 K. 降低脱附温度有利于桥式吸附NO的分子脱附,从而抑制分解反应. 这些结果从表面化学的角度合理地解释了铂催化剂在富氧条件下对NO分解能力的降低.
参考文献
[1] | Iwamoto M;Yahiro H .[J].Catalysis Today,1994,22(01):5. |
[2] | Amirnazmi A;Benson J E;Boudart M .[J].Journal of Catalysis,1973,30(01):55. |
[3] | Ibach H;Lehwald S .[J].Surface Science,1978,76(01):1. |
[4] | Gland J L;Sexton B A .[J].Surface Science,1980,94(2-3):355. |
[5] | Gorte R J;Gland J L .[J].Surface Science,1981,102(2-3):348. |
[6] | Gorte R J;Schmidt L D .[J].Surface Science,1981,111(02):260. |
[7] | Hayden B E .[J].Surface Science,1983,131(2-3):419. |
[8] | Gohndrone J M;Masel R I .[J].Surface Science,1989,209(1-2):44. |
[9] | Sugai S;Takeuchi K;Ban T;Miki H,Kawasaki K,Kioka T .[J].Surface Science,1993,282(1-2):67. |
[10] | Sugai S;Shimizu K;Watanabe H;Miki H,Kawasaki K,Kioka T .[J].Surface Science,1993,287-288:455. |
[11] | Zemlyanov DY.;Gorodetskii VV.;Block JH.;Smirnov MY. .HREELS AND TDS STUDIES OF NO ADSORPTION AND NO+H-2 REACTION ON PT(100) SURFACES[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,1995(1/2):61-70. |
[12] | Mieher WD.;Ho W.;Pelak RA. .COADSORBATE EFFECTS IN SURFACE PHOTOCHEMISTRY - BIMOLECULAR REACTIONS AND PHOTODESORPTION YIELD ENHANCEMENT FOR NO COADSORBED WITH O-2 ON PT(111) [Review][J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,1996(1/3):23-36. |
[13] | Nyberg C;Uvdal P .[J].Surface Science,1991,256(1-2):42. |
[14] | Conrad H;Scala R;Stenzel W;Unwin R .[J].Surface Science,1984,145(01):1. |
[15] | Jakob P;Stichler M;Menzel D .[J].Surface Science,1997,370(01):L185. |
[16] | Stichler M.;Menzel D. .A systematic investigation of the geometrical structures of four oxygen nitric oxide coadsorbate layers on Ru(001)[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,1999(2/3):272-290. |
[17] | Zhu J F;Kinne M;Fuhrmann T;Trnkenschuh B,Denecke R,Steinrück H-P .[J].Surface Science,2003,547(03):410. |
[18] | 李金兵;黄伟新;曹玉明;翟润生,包信和 .[J].催化学报,1998,19(06):494. |
[19] | 李金兵,黄伟新,包信和.NO在Ag-Pt双金属表面上的吸附和分解[J].工业催化,2000(02):23-27. |
[20] | Huang W X;Jiang Zh Q;Jiao J;Tan D L,Zhai R Sh,Bao X H .[J].Surface Science,2002,506(03):L287. |
[21] | Miyazaki E .[J].Journal of Catalysis,1980,65(01):84. |
[22] | Freyer N;Kiskinova M;Pirug G;Bonzel H P .[J].Surface Science,1986,166(01):206. |
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%