Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/96029
DC FieldValue
dc.titleComparative studies of manganese-doped copper-based catalysts: The promoter effect of Mn on methanol synthesis
dc.contributor.authorChen, H.Y.
dc.contributor.authorLin, J.
dc.contributor.authorTan, K.L.
dc.contributor.authorLi, J.
dc.date.accessioned2014-10-16T09:18:40Z
dc.date.available2014-10-16T09:18:40Z
dc.date.issued1998-04
dc.identifier.citationChen, H.Y.,Lin, J.,Tan, K.L.,Li, J. (1998-04). Comparative studies of manganese-doped copper-based catalysts: The promoter effect of Mn on methanol synthesis. Applied Surface Science 126 (3-4) : 323-331. ScholarBank@NUS Repository.
dc.identifier.issn01694332
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/96029
dc.description.abstractA Mn-promoted Cu/ZnO/Al2O3 catalyst with 5-10% improvement in methanol yield as compared with the undoped Cu/ZnO/Al2O3 catalyst under identical conditions has been synthesized. In order to understand the promoter effect of Mn on the methanol production, Cu/Al2O3 and Cu/SiO2 catalysts with and without various amounts of Mn were also prepared and comparatively investigated by microreactor, N2O titration, TPR (Temperature Programmed Reduction) and XPS (X-ray Photoelectron Spectroscopy). Experimental results show that these Mn-promoted catalysts have higher catalytic activity, larger surface Cu concentration, and elevated Cu reduction temperature than their Mn-undoped counterparts. XPS study gives evidence that in the reduced or reacted catalysts, the interaction between Mn and Cu occurs, resulting in the reduction of Mn4+ to Mn2+ or Mn3+, as well as the oxidation of Cu0 and Cu+ to higher oxidation states. This interaction may be responsible for the harder Cu reduction process, better Cu dispersion, higher active center concentration, and thus enhanced methanol yield. © 1998 Elsevier Science B.V.
dc.sourceScopus
dc.subjectCu/ZnO/Al2O3
dc.subjectMethanol synthesis
dc.subjectMn promoter
dc.subjectSupported-Cu-catalyst
dc.subjectTPR
dc.subjectXPS
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.sourcetitleApplied Surface Science
dc.description.volume126
dc.description.issue3-4
dc.description.page323-331
dc.description.codenASUSE
dc.identifier.isiutNOT_IN_WOS
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