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- Publisher Website: 10.1021/acscatal.9b04452
- Scopus: eid_2-s2.0-85084061769
- PMID: 32953234
- WOS: WOS:000526395000002
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Article: Self-Exfoliated Synthesis of Transition Metal Phosphate Nanolayers for Selective Aerobic Oxidation of Ethyl Lactate to Ethyl Pyruvate
Title | Self-Exfoliated Synthesis of Transition Metal Phosphate Nanolayers for Selective Aerobic Oxidation of Ethyl Lactate to Ethyl Pyruvate |
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Authors | |
Keywords | heterogeneous catalysis aerobic oxidation β-phase metal phosphate ultrathin nanosheets lactic acid |
Issue Date | 2020 |
Citation | ACS Catalysis, 2020, v. 10, n. 7, p. 3958-3967 How to Cite? |
Abstract | Two-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 V /V 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-VOPO 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. 4+ 5+ 4 |
Persistent Identifier | http://hdl.handle.net/10722/298349 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhang, Wei | - |
dc.contributor.author | Oulego, Paula | - |
dc.contributor.author | Sharma, Sandeep K. | - |
dc.contributor.author | Yang, Xiu Lin | - |
dc.contributor.author | Li, Lain Jong | - |
dc.contributor.author | Rothenberg, Gadi | - |
dc.contributor.author | Shiju, N. Raveendran | - |
dc.date.accessioned | 2021-04-08T03:08:12Z | - |
dc.date.available | 2021-04-08T03:08:12Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | ACS Catalysis, 2020, v. 10, n. 7, p. 3958-3967 | - |
dc.identifier.uri | http://hdl.handle.net/10722/298349 | - |
dc.description.abstract | Two-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 V /V 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-VOPO 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. 4+ 5+ 4 | - |
dc.language | eng | - |
dc.relation.ispartof | ACS Catalysis | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | heterogeneous catalysis | - |
dc.subject | aerobic oxidation | - |
dc.subject | β-phase | - |
dc.subject | metal phosphate | - |
dc.subject | ultrathin nanosheets | - |
dc.subject | lactic acid | - |
dc.title | Self-Exfoliated Synthesis of Transition Metal Phosphate Nanolayers for Selective Aerobic Oxidation of Ethyl Lactate to Ethyl Pyruvate | - |
dc.type | Article | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1021/acscatal.9b04452 | - |
dc.identifier.pmid | 32953234 | - |
dc.identifier.pmcid | PMC7493282 | - |
dc.identifier.scopus | eid_2-s2.0-85084061769 | - |
dc.identifier.volume | 10 | - |
dc.identifier.issue | 7 | - |
dc.identifier.spage | 3958 | - |
dc.identifier.epage | 3967 | - |
dc.identifier.eissn | 2155-5435 | - |
dc.identifier.isi | WOS:000526395000002 | - |
dc.identifier.issnl | 2155-5435 | - |