6
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Origin of synergistic effects in bicomponent cobalt oxide-platinum catalysts for selective hydrogenation reaction

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The synergistic nature of bicomponent catalysts remains a challenging issue, due to the difficulty in constructing well-defined catalytic systems. Here we study the origin of synergistic effects in CoO x-Pt catalysts for selective hydrogenation by designing a series of closely contacted CoO xPt/TiO 2 and spatially separated CoO x/TiO 2/Pt catalysts by atomic layer deposition (ALD). For CoO x/TiO 2/Pt, CoO x and platinum are separated by the walls of titania nanotubes, and the CoO x-Pt intimacy can be precisely tuned. Like CoO xPt/TiO 2, the CoO x/TiO 2/Pt shows higher selectivity to cinnamyl alcohol than monometallic TiO 2/Pt, indicating that the CoO x-Pt nanoscale intimacy almost has no influence on the selectivity. The enhanced selectivity is ascribed to the increased oxygen vacancy resulting from the promoted hydrogen spillover. Moreover, platinum-oxygen vacancy interfacial sites are identified as the active sites by selectively covering CoO x or platinum by ALD. Our study provides a guide for the understanding of synergistic nature in bicomponent and bifunctional catalysts.

          Abstract

          The development of catalysts with high activity and selectivity for hydrogenation remains a challenge. Here the authors report cobalt oxide-platinum catalysts with increased oxygen vacancy resulting from the promoted hydrogen spillover with platinum-oxygen vacancies as active sites.

          Related collections

          Most cited references47

          • Record: found
          • Abstract: not found
          • Article: not found

          Review of Pt-based bimetallic catalysis: from model surfaces to supported catalysts.

            Bookmark
            • Record: found
            • Abstract: found
            • Article: found

            Designing bimetallic catalysts for a green and sustainable future.

            This Critical Review provides an overview of the recent developments in the synthesis and characterization of bimetallic nanoparticles. Initially the review follows a materials science perspective on preparing bimetallic nanoparticles with designer morphologies, after which the emphasis shifts towards recent developments in using these bimetallic particles for catalysing either oxidation or reduction. In the final part of this review we present an overview of the utilization of bimetallic catalyst systems for the transformation of bio-renewable substrates and reactions related to the realization of a bio-refinery. Because of the sheer number of examples of transformations in this area, a few key examples, namely selective oxidation, hydrogenation/hydrogenolysis and reforming of biomass derived molecules, have been chosen for this review. Reports of bimetallic catalysts being used for the aforementioned transformations are critically analysed and the potential for exploiting such bimetallic catalysts have also been highlighted. A specific objective of this review article is to motivate researchers to synthesize some of the "designer" bimetallic catalysts with specific nanostructures, inspired from recent advances in the area of materials chemistry, and to utilize them for the transformation of biomass derived materials that are very complex and pose different challenges compared to those of simple organic molecules. We consider that supported bimetallic nanoparticles have an important role to play as catalysts in our quest for a more green and sustainable society.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              High-performance bi-functional electrocatalysts of 3D crumpled graphene–cobalt oxide nanohybrids for oxygen reduction and evolution reactions

                Bookmark

                Author and article information

                Contributors
                gaozhe@sxicc.ac.cn
                qinyong@sxicc.ac.cn
                Journal
                Nat Commun
                Nat Commun
                Nature Communications
                Nature Publishing Group UK (London )
                2041-1723
                13 September 2019
                13 September 2019
                2019
                : 10
                : 4166
                Affiliations
                [1 ]ISNI 0000000119573309, GRID grid.9227.e, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, , Chinese Academy of Sciences, ; 27 Taoyuan South Road, 030001 Taiyuan, P.R. China
                [2 ]ISNI 0000 0004 1797 8419, GRID grid.410726.6, Center of Materials Science and Optoelectronics Engineering, , University of Chinese Academy of Sciences, ; 100049 Beijing, P.R. China
                Author information
                http://orcid.org/0000-0002-5567-1464
                Article
                11970
                10.1038/s41467-019-11970-8
                6744570
                31519905
                615cbe47-b08e-4635-89de-02596a4b99c4
                © The Author(s) 2019

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 5 December 2018
                : 14 August 2019
                Funding
                Funded by: FundRef https://doi.org/10.13039/501100001809, National Natural Science Foundation of China (National Science Foundation of China);
                Award ID: 21773282, U1832208 and 21673269
                Award Recipient :
                Funded by: National Science Fund for Distinguished Young Scholars (21825204), the National Key R&D Program of China (2017YFA0700101), Natural Science Foundation of Shanxi Province (201801D211011), Excellent Youth Scholars of State Key Laboratory of Coal Conversion (2016BWZ004), Youth Innovation Promotion Association of the Chinese Academy of Sciences (2018208), and National Postdoctoral Program for Innovative Talents (BX20180323).
                Categories
                Article
                Custom metadata
                © The Author(s) 2019

                Uncategorized
                catalysis,catalyst synthesis,catalytic mechanisms,heterogeneous catalysis
                Uncategorized
                catalysis, catalyst synthesis, catalytic mechanisms, heterogeneous catalysis

                Comments

                Comment on this article