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  • Holm, Alexander,1983-Linköpings universitet,Stockholms universitet,Fysikum,Institutionen för material- och miljökemi (MMK),Linköping University, Sweden,Laboratoriet för organisk elektronik,Tekniska fakulteten,Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden;Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 114 18 Stockholm, Sweden (author)

A Water-Promoted Mars-van Krevelen Reaction Dominates Low-Temperature CO Oxidation over Au-Fe2O3 but Not over Au-TiO2

  • Article/chapterEnglish2024

Publisher, publication year, extent ...

  • 2024
  • printrdacarrier

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  • LIBRIS-ID:oai:DiVA.org:su-227301
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-227301URI
  • https://doi.org/10.1021/acscatal.3c05978DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-201288URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding: WISE [2016.0042]; VR [2013.8823, 2017.00559, 2019-05114, WISE-ap1]
  • We provide experimental evidence that is inconsistent with often proposed Langmuir−Hinshelwood (LH) mechanistic hypotheses for water-promoted CO oxidation over Au–Fe2O3. Passing CO and H2O, but no O2, over Au-γ-Fe2O3 at 25 °C, we observe significant CO2 production, inconsistent with LH mechanistic hypotheses. Experiments with H218O further show that previous LH mechanistic proposals cannot account for water-promoted CO oxidation over Au-γ-Fe2O3. Guided by density functional theory, we instead postulate a water-promoted Mars–van Krevelen (w-MvK) reaction. Our proposed w-MvK mechanism is consistent both with observed CO2 production in the absence of O2 and with CO oxidation in the presence of H218O and 16O2. In contrast, for Au-TiO2, our data is consistent with previous LH mechanistic hypotheses. 

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Davies, Bernadette,1997-Stockholms universitet,Institutionen för material- och miljökemi (MMK),Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden;Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 114 18 Stockholm, Sweden(Swepub:su)beda4636 (author)
  • Boscolo Bibi, Sara,1993-Stockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden(Swepub:su)sabo7733 (author)
  • Moncada, Felix,1989-Stockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden(Swepub:su)femo7585 (author)
  • Halldin-Stenlid, JoakimKBR, Inc., Intelligent Systems Division, NASA Ames Research Center, Moffett Field, California 94035, United States (author)
  • Paškevičius, LaurynasStockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden (author)
  • Claman, VincentStockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden (author)
  • Slabon, Adam,1983-Stockholms universitet,Institutionen för material- och miljökemi (MMK),Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 114 18 Stockholm, Sweden;Inorganic Chemistry, University of Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany(Swepub:su)adsl1265 (author)
  • Tai, Cheuk-Wai,1973-Stockholms universitet,Institutionen för material- och miljökemi (MMK),Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 114 18 Stockholm, Sweden(Swepub:su)ctai (author)
  • dos-Santos, Egon CamposAdvanced Institute for Materials Research (WPI-AIMR), Tohoku University, Aoba-ku, Sendai 980-8577, Japan (author)
  • Koroidov, Sergey,1982-Stockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden(Swepub:su)seko8500 (author)
  • Stockholms universitetFysikum (creator_code:org_t)

Related titles

  • In:ACS Catalysis14:5, s. 3191-31972155-5435

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