Bernard Coq ∗ , Eleanor Crabb , Mayukh Warawdekar , Geoffrey C. Bond , Joop C. Slaa , Signorino Galvagno , Lucina Mercadante , Joaquin Garcia Ruiz , Maria Conception Sanchez Sierra
{"title":"钌双金属催化剂的催化和结构性能:制备和表征","authors":"Bernard Coq ∗ , Eleanor Crabb , Mayukh Warawdekar , Geoffrey C. Bond , Joop C. Slaa , Signorino Galvagno , Lucina Mercadante , Joaquin Garcia Ruiz , Maria Conception Sanchez Sierra","doi":"10.1016/0304-5102(94)85006-2","DOIUrl":null,"url":null,"abstract":"<div><p>In the framework of an EC Stimulation Action Programme, alumina-supported mono- and bimetallic Ru, RuGe, RuSn and RuPb catalysts have been prepared from both organic and inorganic precursors. Herein are presented some basic properties of these materials obtained by TPR and TPO experiments, H<sub>2</sub> and CO chemisorption, TEM examination, XPS and EXAFS studies. The use of organic precursors led to very small Ru particles, with a coordination number between Ru atoms of 4.35 (Ru<sup>0</sup>-Ru<sup>0</sup>+Ru<sup>0</sup>-Ru<sup>δ+</sup>). The size of the metallic particles was not modified by adding Ge, Sn or Pb by the controlled surface reaction technique. In very small aggregates, some Ru atoms (10–15%) remained partially oxidised even after reduction at 623 K in flowing hydrogen. During the coimpregnation of alumina with inorganic precursors, the modifier played the role of a nucleation center for Ru, thus allowing small particles to be formed. We believe that CO could modify the surface composition of small bimetallic RuGe particles during the chemisorption.</p></div>","PeriodicalId":16567,"journal":{"name":"分子催化","volume":"92 1","pages":"Pages 107-121"},"PeriodicalIF":0.0000,"publicationDate":"1994-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-5102(94)85006-2","citationCount":"40","resultStr":"{\"title\":\"Catalytic and structural properties of ruthenium bimetallic catalysts: Preparation and characterization\",\"authors\":\"Bernard Coq ∗ , Eleanor Crabb , Mayukh Warawdekar , Geoffrey C. Bond , Joop C. Slaa , Signorino Galvagno , Lucina Mercadante , Joaquin Garcia Ruiz , Maria Conception Sanchez Sierra\",\"doi\":\"10.1016/0304-5102(94)85006-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the framework of an EC Stimulation Action Programme, alumina-supported mono- and bimetallic Ru, RuGe, RuSn and RuPb catalysts have been prepared from both organic and inorganic precursors. Herein are presented some basic properties of these materials obtained by TPR and TPO experiments, H<sub>2</sub> and CO chemisorption, TEM examination, XPS and EXAFS studies. The use of organic precursors led to very small Ru particles, with a coordination number between Ru atoms of 4.35 (Ru<sup>0</sup>-Ru<sup>0</sup>+Ru<sup>0</sup>-Ru<sup>δ+</sup>). The size of the metallic particles was not modified by adding Ge, Sn or Pb by the controlled surface reaction technique. In very small aggregates, some Ru atoms (10–15%) remained partially oxidised even after reduction at 623 K in flowing hydrogen. During the coimpregnation of alumina with inorganic precursors, the modifier played the role of a nucleation center for Ru, thus allowing small particles to be formed. We believe that CO could modify the surface composition of small bimetallic RuGe particles during the chemisorption.</p></div>\",\"PeriodicalId\":16567,\"journal\":{\"name\":\"分子催化\",\"volume\":\"92 1\",\"pages\":\"Pages 107-121\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1994-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0304-5102(94)85006-2\",\"citationCount\":\"40\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"分子催化\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0304510294850062\",\"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/0304510294850062","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
Catalytic and structural properties of ruthenium bimetallic catalysts: Preparation and characterization
In the framework of an EC Stimulation Action Programme, alumina-supported mono- and bimetallic Ru, RuGe, RuSn and RuPb catalysts have been prepared from both organic and inorganic precursors. Herein are presented some basic properties of these materials obtained by TPR and TPO experiments, H2 and CO chemisorption, TEM examination, XPS and EXAFS studies. The use of organic precursors led to very small Ru particles, with a coordination number between Ru atoms of 4.35 (Ru0-Ru0+Ru0-Ruδ+). The size of the metallic particles was not modified by adding Ge, Sn or Pb by the controlled surface reaction technique. In very small aggregates, some Ru atoms (10–15%) remained partially oxidised even after reduction at 623 K in flowing hydrogen. During the coimpregnation of alumina with inorganic precursors, the modifier played the role of a nucleation center for Ru, thus allowing small particles to be formed. We believe that CO could modify the surface composition of small bimetallic RuGe particles during the chemisorption.
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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