焦磷酸氧钒
化合物
焦磷酸氧钒是一种无机化合物，化学式为(VO)2P2O7，它存在α、β和γ三种晶型[1]。它可由磷酸氢钒酰(IV)（VO(HPO4)·1⁄2H2O）在350 °C以上的热分解制得。[2]氨可以将其中的钒从四价还原至三价。[3]它和磷酸钒(III)、二氧化钒在二氯化铂存在下反应，可以得到钒的混合价态磷酸盐VIIIVIV3O3(PO4)3：[4]
| 焦磷酸氧钒 | |
|---|---|
| 别名 | VPP |
| 识别 | |
| CAS号 | 58834-75-6 
|
| PubChem | 10924846 |
| SMILES |
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| 性质 | |
| 化学式 | (VO)2P2O7 |
| 摩尔质量 | 307.83 g·mol⁻¹ |
| 外观 | 灰色固体[1] |
| 若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。 | |
- (VO)2P2O7 + VPO4 + VO2 → V4O3(PO4)3
它和金属氧化物（MO，M=Co, Ni, Cu）在高温反应，可以得到MV2O2(PO4)2：[5]
- (VO)2P2O7 + MO → MV2O2(PO4)2 (M=Co, Ni, Cu)
参考文献
- ^ 1.0 1.1 Bordes, E., Courtine, P., & Johnson, J. W. (1984). On the topotactic dehydration of VOHPO4 · 0.5 H2O into vanadyl pyrophosphate. Journal of Solid State Chemistry, 55(3), 270–279. doi:10.1016/0022-4596(84)90277-9
- ^ Preparation and characterization of vanadyl hydrogen phosphate hemihydrate and its topotactic transformation to vanadyl pyrophosphate. J. Am. Chem. Soc. 1984. 106 (26). doi:10.1021/ja00338a020.
- ^ Redox interaction of ammonia with (VO)2P2O7. J. Chem. Soc., Faraday Trans., 1995, 91, 725-731. doi:10.1039/FT9959100725.
- ^ VIIIVIV3O3(PO4)3: A Novel Vanadium Phosphate for Selective Oxidation of Light Hydrocarbons. Chemistry of Materials, 2007. 19 (17). doi:10.1021/cm071036u
- ^ Beiträge zum thermischen Verhalten und zur Kristallchemie wasserfreier Phosphate. XXXIX（德文）. Journal of Inorganic and General Chemistry, 2008. 634 (10): 1677-1686. doi:10.1002/zaac.200800197.
- ^ The Catalytic Function of Phosphorus Enriched on the Surface of Vanadium-based Catalysts in Selective Oxidations. ChemCatChem, 2023. 15 (21). e202300839. doi:10.1002/cctc.202300839
- ^ Influence of Steam on a Vanadyl Pyrophosphate Catalyst During Propane Oxidation. J. Phys. Chem. B 2018, 122, 2, 695–704. doi:10.1021/acs.jpcb.7b06314.
- ^ Green and selective oxidation of cyclohexane over vanadium pyrophosphate supported on mesoporous KIT-6. Chemical Engineering Journal, 2017. doi:10.1016/j.cej.2016.12.009.
拓展阅读
- Lucas Foppa, Frederik Rüther, Michael Geske, Gregor Koch, Frank Girgsdies, Pierre Kube, Spencer J. Carey, Michael Hävecker, Olaf Timpe, Andrey V. Tarasov, Matthias Scheffler, Frank Rosowski, Robert Schlögl, and Annette Trunschke. Data-Centric Heterogeneous Catalysis: Identifying Rules and Materials Genes of Alkane Selective Oxidation. J. Am. Chem. Soc. 2023, 145, 6, 3427–3442. doi:10.1021/jacs.2c11117.
- Wen-Sheng Dong; Jonathan K. Bartley; Frank Girgsdies; Robert Schlögl; Graham J. Hutchings. The hydration and transformation of vanadyl pyrophosphate. J. Mater. Chem., 2005,15, 4147-4153. doi:10.1039/B509296E.