焦磷酸氧釩

焦磷酸氧釩
別名	VPP
識別
CAS號	58834-75-6
PubChem	10924846
SMILES	O=[V]1OP2(=O)O[V](=O)OP(=O)(O1)O2;
性質
化學式	(VO)2P2O7
摩爾質量	307.83 g·mol⁻¹
外觀	灰色固體
	若非註明，所有數據均出自標準狀態（25 ℃，100 kPa）下。

焦磷酸氧釩是一種無機化合物，化學式為(VO)₂P₂O₇，它存在α、β和γ三種晶型^[1]。它可由磷酸氫釩酰(IV)（VO(HPO₄)·¹⁄₂H₂O）在350 °C以上的熱分解製得。^[2]氨可以將其中的釩從四價還原至三價。^[3]它和磷酸釩(III)、二氧化釩在二氯化鉑存在下反應，可以得到釩的混合價態磷酸鹽V^IIIV^IV₃O₃(PO₄)₃：^[4]

(VO)₂P₂O₇ + VPO₄ + VO₂ → V₄O₃(PO₄)₃

它和金屬氧化物（MO，M=Co, Ni, Cu）在高溫反應，可以得到MV₂O₂(PO₄)₂：^[5]

(VO)₂P₂O₇ + MO → MV₂O₂(PO₄)₂ (M=Co, Ni, Cu)

它可用作烷烴及環烷烴氧化的催化劑。^[6]^[7]^[8]

參考文獻

^ ^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.
^ V^IIIV^IV₃O₃(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.

拓展閱讀

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.

[Bordes-1] 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

[2] 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.

[3] Redox interaction of ammonia with (VO)₂P₂O₇. J. Chem. Soc., Faraday Trans., 1995, 91, 725-731. doi:10.1039/FT9959100725.

[4] V^IIIV^IV₃O₃(PO₄)₃: A Novel Vanadium Phosphate for Selective Oxidation of Light Hydrocarbons. Chemistry of Materials, 2007. 19 (17). doi:10.1021/cm071036u

[5] 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.

[6] 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

[7] 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.

[8] 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.

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