P. Bosch , M.A. Valenzuela , B. Zapata , D. Acosta , G. Aguilar-Ríos , C. Maldonado , I. Schifter
{"title":"高温处理Pt/SnZnAl2O4催化剂","authors":"P. Bosch , M.A. Valenzuela , B. Zapata , D. Acosta , G. Aguilar-Ríos , C. Maldonado , I. Schifter","doi":"10.1016/0304-5102(94)00095-6","DOIUrl":null,"url":null,"abstract":"<div><p>SnZnAl<sub>2</sub>O<sub>4</sub> mixed supports were prepared by coprecipitation method with Sn contents of 0.5, 1.6 and 3 wt.%. Later Pt (1 wt.%) was incorporated by impregnation and samples reduced in hydrogen at 823 and 1073 K. Chemisorption data showed a decrease in hydrogen as temperature increases which is attributed to PtSn alloy formation. Catalytic activity in isobutane dehydrogenation and n-heptane dehydrocyclization seems to be dependent on the amount of metallic Pt phase. Pt/SnZnAl<sub>2</sub>O<sub>4</sub> catalysts were thermally more stable than Pt/ZnAl<sub>2</sub>O<sub>4</sub> preparation. Tin alters the ZnAl<sub>2</sub>O<sub>4</sub> properties towards a higher thermal stability, but if added in more than 1 wt.%, it alloys with platinum inhibiting catalytic performance.</p></div>","PeriodicalId":16567,"journal":{"name":"分子催化","volume":"93 1","pages":"Pages 67-78"},"PeriodicalIF":0.0000,"publicationDate":"1994-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-5102(94)00095-6","citationCount":"20","resultStr":"{\"title\":\"High temperature treated Pt/Sn ZnAl2O4 catalysts\",\"authors\":\"P. Bosch , M.A. Valenzuela , B. Zapata , D. Acosta , G. Aguilar-Ríos , C. Maldonado , I. Schifter\",\"doi\":\"10.1016/0304-5102(94)00095-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>SnZnAl<sub>2</sub>O<sub>4</sub> mixed supports were prepared by coprecipitation method with Sn contents of 0.5, 1.6 and 3 wt.%. Later Pt (1 wt.%) was incorporated by impregnation and samples reduced in hydrogen at 823 and 1073 K. Chemisorption data showed a decrease in hydrogen as temperature increases which is attributed to PtSn alloy formation. Catalytic activity in isobutane dehydrogenation and n-heptane dehydrocyclization seems to be dependent on the amount of metallic Pt phase. Pt/SnZnAl<sub>2</sub>O<sub>4</sub> catalysts were thermally more stable than Pt/ZnAl<sub>2</sub>O<sub>4</sub> preparation. Tin alters the ZnAl<sub>2</sub>O<sub>4</sub> properties towards a higher thermal stability, but if added in more than 1 wt.%, it alloys with platinum inhibiting catalytic performance.</p></div>\",\"PeriodicalId\":16567,\"journal\":{\"name\":\"分子催化\",\"volume\":\"93 1\",\"pages\":\"Pages 67-78\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1994-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0304-5102(94)00095-6\",\"citationCount\":\"20\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"分子催化\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0304510294000956\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Chemical Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"分子催化","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304510294000956","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
SnZnAl2O4 mixed supports were prepared by coprecipitation method with Sn contents of 0.5, 1.6 and 3 wt.%. Later Pt (1 wt.%) was incorporated by impregnation and samples reduced in hydrogen at 823 and 1073 K. Chemisorption data showed a decrease in hydrogen as temperature increases which is attributed to PtSn alloy formation. Catalytic activity in isobutane dehydrogenation and n-heptane dehydrocyclization seems to be dependent on the amount of metallic Pt phase. Pt/SnZnAl2O4 catalysts were thermally more stable than Pt/ZnAl2O4 preparation. Tin alters the ZnAl2O4 properties towards a higher thermal stability, but if added in more than 1 wt.%, it alloys with platinum inhibiting catalytic performance.
期刊介绍：
Journal of Molecular Catalysis (China) is a bimonthly journal, founded in 1987. It is a bimonthly journal, founded in 1987, sponsored by Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, under the supervision of Chinese Academy of Sciences, and published by Science Publishing House, which is a scholarly journal openly circulated both at home and abroad. The journal mainly reports the latest progress and research results on molecular catalysis. It contains academic papers, research briefs, research reports and progress reviews. The content focuses on coordination catalysis, enzyme catalysis, light-ribbed catalysis, stereochemistry in catalysis, catalytic reaction mechanism and kinetics, the study of catalyst surface states and the application of quantum chemistry in catalysis. We also provide contributions on the activation, deactivation and regeneration of homogeneous catalysts, solidified homogeneous catalysts and solidified enzyme catalysts in industrial catalytic processes, as well as on the optimisation and characterisation of catalysts for new catalytic processes.
The main target readers are scientists and postgraduates working in catalysis in research institutes, industrial and mining enterprises, as well as teachers and students of chemistry and chemical engineering departments in colleges and universities. Contributions from related professionals are welcome.
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