研究了在大气+氨混合气体(氨浓度11.8％)、压力0.1 MPa和温度为820～850℃环境中Pt、Pd和Ni金属的腐蚀,采用SEM、TEM和XPS观测和分析了试样腐蚀形貌特征和表面化学状态.所研究的3种金属显示了完全不同的腐蚀行为.讨论了Pt和Pd金属的腐蚀机制,腐蚀特性与金属及其氧化物的挥发、再沉积、氧吸附和晶面稳定性有关.
参考文献
| [1] | Knapton A G .Ensuring the most advantageous use of platinum[J].Platinum Metals Review,1979,23(01):2-13. |
| [2] | Flytzani Stephanopoulos M;Wong S;Shmidt L D .Surface morphology of platinum catalysts[J].Journal of Catalysis,1977,49:51-82. |
| [3] | Pielaszek J .The catalytic etching of platinum and rhodium platinum gauzes[J].Platinum Metals Review,1984,28(03):109-I14. |
| [4] | McCabe A R;Smith G D W;Pratt A S .The mechanism of reconstruction of rhodium-platinum catalyst gauzes[J].Platinum Metals Review,1986,30(02):54-62. |
| [5] | John F M.Handbook of X-ray Photoelectron Spectroscopy,Published by Perkin-Elmer Coqoration[A].USA:Physical Electronics Division,6509 Flying Cloud Drive,1992 |
| [6] | Goldberg R N;Hepler L G .Thermochemistry and oxidation potentials of the platinum group metals and their compounds[J].Chemical Reviews,1968,68(02):229-249. |
| [7] | Chaston J C .The oxidation of the platinum metals[J].Platinum Metals Review,1975,19(04):135. |
| [8] | McCabe R W;Pignet T;Schmidt L D .Catalytic etching of platinum in NH3 oxidation[J].Journal of Catalysis,1974,32:114-126. |
| [9] | Benner L S;Suzuki T;Meguro K.Precious Metals Science and Technology[M].Austin in U.S.A:The International Precious Metals Institute,1991 |
| [10] | Yuantao Ning;Zhengfen Yang;Huaizhi Zhao .Platinum Recovery by Palladium Alloy Catchment Gauzes in Nitric Acid Plants[J].Platinum Metals Review,1996(2):80-87. |
| [11] | Yuantao Ning;Zhengfen Yang;Huaizhi Zhao .Structure Reconstruction in Palladium Alloy Catchment Gauzes[J].Platinum Metals Review,1995(1):19-26. |
| [12] | YANG Zhengfen;NING Yuantao;ZHAO Huaizhi .Changes of composition and surface state of palladium-nickel alloy gauzes used in ammonia oxidation apparatus[J].Journal of Alloys and Compounds,1995,218:51-57. |
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