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dc.contributor.authorZhang, Wei
dc.contributor.authorOulego, Paula
dc.contributor.authorSharma, Sandeep K.
dc.contributor.authorYang, Xiulin
dc.contributor.authorLi, Lain-Jong
dc.contributor.authorRothenberg, Gadi
dc.contributor.authorShiju, N. Raveendran
dc.date.accessioned2020-05-12T09:25:09Z
dc.date.available2020-05-12T09:25:09Z
dc.date.issued2020-02-19
dc.date.submitted2019-10-15
dc.identifier.citationZhang, W., Oulego, P., Sharma, S. K., Yang, X.-L., Li, L.-J., Rothenberg, G., & Shiju, N. R. (2020). Self-Exfoliated Synthesis of Transition Metal Phosphate Nanolayers for Selective Aerobic Oxidation of Ethyl Lactate to Ethyl Pyruvate. ACS Catalysis, 10(7), 3958–3967. doi:10.1021/acscatal.9b04452
dc.identifier.issn2155-5435
dc.identifier.doi10.1021/acscatal.9b04452
dc.identifier.urihttp://hdl.handle.net/10754/662805
dc.description.abstractTwo-dimensional (2D) transition metal nanosheets are promising catalysts because of the enhanced exposure of the active species compared to their 3D counterparts. Here, we report a simple, scalable, and reproducible strategy to prepare 2D phosphate nanosheets by forming a layered structure in situ from phytic acid (PTA) and transition metal precursors. Controlled combustion of the organic groups of PTA results in interlayer carbon, which keeps the layers apart during the formation of phosphate, and the removal of this carbon results in ultrathin nanosheets with controllable layers. Applying this concept to vanadyl phosphate synthesis, we show that the method yields 2D ultrathin nanosheets of the orthorhombic β-form, exposing abundant V4+/V5+ redox sites and oxygen vacancies. We demonstrate the high catalytic activity of this material in the vapor-phase aerobic oxidation of ethyl lactate to ethyl pyruvate. Importantly, these β-VOPO4 compounds do not get hydrated, thereby reducing the competing hydrolysis reaction by water byproducts. The result has superior selectivity to ethyl pyruvate compared to analogous vanadyl phosphates. The catalysts are highly stable, maintaining a steady-state conversion of ∼90% (with >80% selectivity) for at least 80 h on stream. This "self-exfoliated" synthesis protocol opens opportunities for preparing structurally diverse metal phosphates for catalysis and other applications.
dc.description.sponsorshipW.Z. thanks the China Scholarship Council (201506140058) for a PhD fellowship. P.O. thanks the Spanish Ministry of Economy and Competitiveness (MINECO) (Project CTM2015-63864-R) and the European Union (FEDER) for funding. P.O. also thanks the access and technical assistance from the Scientific-Technical Services of the University of Oviedo. This work is part of the Research Priority Area Sustainable Chemistry of the University of Amsterdam, http://suschem.uva.nl.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acscatal.9b04452
dc.relation.urlhttps://pubs.acs.org/doi/pdf/10.1021/acscatal.9b04452
dc.rightsThis is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License, which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html
dc.titleSelf-Exfoliated Synthesis of Transition Metal Phosphate Nanolayers for Selective Aerobic Oxidation of Ethyl Lactate to Ethyl Pyruvate
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalACS Catalysis
dc.rights.embargodate2021-02-19
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionVan 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
dc.contributor.institutionDepartment of Chemical and Environmental Engineering, University of Oviedo, C/ Julián Clavería, s/n., E-33071 Oviedo, Spain
dc.contributor.institutionRadiochemistry Division, Bhabha Atomic Research Centre, 400 085 Mumbai, India
dc.identifier.volume10
dc.identifier.issue7
dc.identifier.pages3958-3967
kaust.personYang, Xiu Lin
kaust.personLi, Lain-Jong
dc.date.accepted2020-02-17
dc.identifier.eid2-s2.0-85084061769
refterms.dateFOA2020-05-12T09:27:51Z
dc.date.published-online2020-02-19
dc.date.published-print2020-04-03


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