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      Enhanced catalytic performance of MnxOy–Na2WO4/SiO2 for the oxidative coupling of methane using an ordered mesoporous silica support

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          Abstract

          The oxidative coupling of methane is a highly promising reaction for its direct conversion.

          The oxidative coupling of methane is a highly promising reaction for its direct conversion. Silica supported Mn xO y–Na 2WO 4 is a suitable catalyst for this reaction. In this study, a variety of different SiO 2 materials have been tested as supports. Surprisingly, the application of ordered mesoporous silicas, here exemplarily shown for SBA-15 as support materials, greatly enhances the catalytic performance. The CH 4 conversion increased two fold and also the C 2 selectivity is strongly increased.

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          Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom Pores

          D. Zhao (1998)
          Article 0 comments Cited 664 times – based on 0 reviews     Review now
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            Catalytic nanoarchitectures--the importance of nothing and the unimportance of periodicity.

            Debra Rolison (2003)
            Heterogeneous catalysis has always been an inherently nanoscopic phenomenon with important technological and societal consequences for energy conversion and the production of chemicals. New opportunities for improved performance arise when the multifunctionality inherent in catalytic processes, including molecular transport of reactants and products, is rethought in light of architectures designed and fabricated from the appropriate nanoscale building blocks, including the use of "nothing" (void space) and deliberate disorder as design components. Architectures with all of the appropriate electrochemical and catalytic requirements, including large surface areas readily accessible to molecules, may now be assembled on the benchtop. Designing catalytic nanoarchitectures that depart from the hegemony of periodicity and order offers the promise of even higher activity.
            Article 0 comments Cited 184 times – based on 0 reviews     Review now
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              Towards stable catalysts by controlling collective properties of supported metal nanoparticles.

              Jovana Zečević, Heiner Friedrich, Krijn P. de Jong … (2013)
              Supported metal nanoparticles play a pivotal role in areas such as nanoelectronics, energy storage/conversion and as catalysts for the sustainable production of fuels and chemicals. However, the tendency of nanoparticles to grow into larger crystallites is an impediment for stable performance. Exemplarily, loss of active surface area by metal particle growth is a major cause of deactivation for supported catalysts. In specific cases particle growth might be mitigated by tuning the properties of individual nanoparticles, such as size, composition and interaction with the support. Here we present an alternative strategy based on control over collective properties, revealing the pronounced impact of the three-dimensional nanospatial distribution of metal particles on catalyst stability. We employ silica-supported copper nanoparticles as catalysts for methanol synthesis as a showcase. Achieving near-maximum interparticle spacings, as accessed quantitatively by electron tomography, slows down deactivation up to an order of magnitude compared with a catalyst with a non-uniform nanoparticle distribution, or a reference Cu/ZnO/Al(2)O(3) catalyst. Our approach paves the way towards the rational design of practically relevant catalysts and other nanomaterials with enhanced stability and functionality, for applications such as sensors, gas storage, batteries and solar fuel production.
              Article 0 comments Cited 148 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (publisher-id): CHCOFS
                Title: Chem. Commun.
                Abbreviated Title: Chem. Commun.
                Publisher: Royal Society of Chemistry (RSC)
                ISSN (Print): 1359-7345
                ISSN (Electronic): 1364-548X
                Publication date Created: 2014
                Publication date (Print): 2014
                Volume: 50
                Issue: 92
                Pages: 14440-14442
                Article
                DOI: 10.1039/C4CC06561A
                SO-VID: 75dadc85-d36c-465e-9057-47e90771d595
                Copyright © © 2014
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