Acid–Base Property of Tetragonal YNbO4 with Phosphate Groups and Its Catalysis for the Dehydration of Glucose to 5‐Hydroxymethylfurfural
Acid–base properties of amphoteric crystalline YNbO4, which is synthesized by co‐precipitation method using a water‐soluble Nb peroxo complex, are adjusted by the impregnation of phosphate groups. The resulting phosphate–YNbO4 materials are tested for glucose dehydration to 5‐hydroxymethylfurfural (...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-06-01
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| Series: | Small Structures |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/sstr.202200224 |
| _version_ | 1797772489985622016 |
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| author | Daniele Padovan Koichiro Endo Takeshi Matsumoto Toshiyuki Yokoi Atsushi Fukuoka Hideki Kato Kiyotaka Nakajima |
| author_facet | Daniele Padovan Koichiro Endo Takeshi Matsumoto Toshiyuki Yokoi Atsushi Fukuoka Hideki Kato Kiyotaka Nakajima |
| author_sort | Daniele Padovan |
| collection | DOAJ |
| description | Acid–base properties of amphoteric crystalline YNbO4, which is synthesized by co‐precipitation method using a water‐soluble Nb peroxo complex, are adjusted by the impregnation of phosphate groups. The resulting phosphate–YNbO4 materials are tested for glucose dehydration to 5‐hydroxymethylfurfural (HMF). Both activity and selectivity increase by the introduction of phosphate groups, giving the optimal catalyst with five phosphate groups per nm2 of surface (5P‐YNbO4). 5P‐YNbO4 shows ≈50% selectivity at 75% conversion. Pyridine adsorption experiments show that 5P‐YNbO4 exclusively possesses Lewis acidity. NH3‐ and CO2‐temperature programmed desorption measurements confirm that phosphoric acid treatment increases acid strength and acid density with concurrent loss of basicity. Experiments using isotope‐labeled glucose clarify that HMF is formed on 5P‐YNbO4 through the stepwise dehydration reaction mechanism. Recyclability experiments show an accumulation of carbon deposits at the end of each reaction causing deactivation, but the activity can be completely recovered by successive washing with water and subsequent calcination at 400 °C in air. |
| first_indexed | 2024-03-12T21:51:39Z |
| format | Article |
| id | doaj.art-e105984813674c1ab17390a0f46da931 |
| institution | Directory Open Access Journal |
| issn | 2688-4062 |
| language | English |
| last_indexed | 2024-03-12T21:51:39Z |
| publishDate | 2023-06-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj.art-e105984813674c1ab17390a0f46da9312023-07-26T01:40:18ZengWiley-VCHSmall Structures2688-40622023-06-0146n/an/a10.1002/sstr.202200224Acid–Base Property of Tetragonal YNbO4 with Phosphate Groups and Its Catalysis for the Dehydration of Glucose to 5‐HydroxymethylfurfuralDaniele Padovan0Koichiro Endo1Takeshi Matsumoto2Toshiyuki Yokoi3Atsushi Fukuoka4Hideki Kato5Kiyotaka Nakajima6Institute for Catalysis Hokkaido University Kita 21 Nishi 10, Kita-ku Sapporo Hokkaido 001-0021 JapanInstitute for Catalysis Hokkaido University Kita 21 Nishi 10, Kita-ku Sapporo Hokkaido 001-0021 JapanInstitute of Innovative Research Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 JapanInstitute of Innovative Research Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 JapanInstitute for Catalysis Hokkaido University Kita 21 Nishi 10, Kita-ku Sapporo Hokkaido 001-0021 JapanInstitute of Multidisciplinary Research for Advanced Materials Tohoku University Sendai Miyagi 980-8522 JapanInstitute for Catalysis Hokkaido University Kita 21 Nishi 10, Kita-ku Sapporo Hokkaido 001-0021 JapanAcid–base properties of amphoteric crystalline YNbO4, which is synthesized by co‐precipitation method using a water‐soluble Nb peroxo complex, are adjusted by the impregnation of phosphate groups. The resulting phosphate–YNbO4 materials are tested for glucose dehydration to 5‐hydroxymethylfurfural (HMF). Both activity and selectivity increase by the introduction of phosphate groups, giving the optimal catalyst with five phosphate groups per nm2 of surface (5P‐YNbO4). 5P‐YNbO4 shows ≈50% selectivity at 75% conversion. Pyridine adsorption experiments show that 5P‐YNbO4 exclusively possesses Lewis acidity. NH3‐ and CO2‐temperature programmed desorption measurements confirm that phosphoric acid treatment increases acid strength and acid density with concurrent loss of basicity. Experiments using isotope‐labeled glucose clarify that HMF is formed on 5P‐YNbO4 through the stepwise dehydration reaction mechanism. Recyclability experiments show an accumulation of carbon deposits at the end of each reaction causing deactivation, but the activity can be completely recovered by successive washing with water and subsequent calcination at 400 °C in air.https://doi.org/10.1002/sstr.202200224biomass valorizationheterogeneous catalysismaterial characterizationsmixed metal oxidessolid Lewis acids |
| spellingShingle | Daniele Padovan Koichiro Endo Takeshi Matsumoto Toshiyuki Yokoi Atsushi Fukuoka Hideki Kato Kiyotaka Nakajima Acid–Base Property of Tetragonal YNbO4 with Phosphate Groups and Its Catalysis for the Dehydration of Glucose to 5‐Hydroxymethylfurfural Small Structures biomass valorization heterogeneous catalysis material characterizations mixed metal oxides solid Lewis acids |
| title | Acid–Base Property of Tetragonal YNbO4 with Phosphate Groups and Its Catalysis for the Dehydration of Glucose to 5‐Hydroxymethylfurfural |
| title_full | Acid–Base Property of Tetragonal YNbO4 with Phosphate Groups and Its Catalysis for the Dehydration of Glucose to 5‐Hydroxymethylfurfural |
| title_fullStr | Acid–Base Property of Tetragonal YNbO4 with Phosphate Groups and Its Catalysis for the Dehydration of Glucose to 5‐Hydroxymethylfurfural |
| title_full_unstemmed | Acid–Base Property of Tetragonal YNbO4 with Phosphate Groups and Its Catalysis for the Dehydration of Glucose to 5‐Hydroxymethylfurfural |
| title_short | Acid–Base Property of Tetragonal YNbO4 with Phosphate Groups and Its Catalysis for the Dehydration of Glucose to 5‐Hydroxymethylfurfural |
| title_sort | acid base property of tetragonal ynbo4 with phosphate groups and its catalysis for the dehydration of glucose to 5 hydroxymethylfurfural |
| topic | biomass valorization heterogeneous catalysis material characterizations mixed metal oxides solid Lewis acids |
| url | https://doi.org/10.1002/sstr.202200224 |
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