The mechanism of the synthesis in connection with assignments for a solid 
reaction cycle of the HPA catalyst during catalytic reactions

Ilkenhans, T.; Siegert, H.; Schlögl, Robert

doi:10.1016/S0920-5861(96)00218-0

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The mechanism of the synthesis in connection with assignments for a solid reaction cycle of the HPA catalyst during catalytic reactions

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Schlögl, Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Ilkenhans, T., Siegert, H., & Schlögl, R. (1996). The mechanism of the synthesis in connection with assignments for a solid reaction cycle of the HPA catalyst during catalytic reactions. Catalysis Today, 32(1-4), 337-347. doi:10.1016/S0920-5861(96)00218-0.

Cite as: https://hdl.handle.net/21.11116/0000-000A-10E7-F

Abstract

The mechanisms of the oxide syntheses to PMo₁₂ and PVMo₁₁ were enlightened by in situ UV/VIS and ³¹P-NMR. Different solution stabilities of the products were discovered. After several crystalline phase transformations of the solid at higher temperatures (> 573 K) spectroscopic assignments for defect HPA formation were determined. Water supports reversible restructuring into the intact Keggin structure. As a consequence we propose a model concept for a solid repair cycle of the catalyst.