The surface and catalytic properties of oxide ternary materials consisting of niobium-phosphorus-silicon, Nb-P-Si, with Nb/P = 1 and general formula xNb₂O₅·xP₂O₅·(100–2x)·SiO₂, with x = 2.5, 5, 7.5, and 10, and Si content ranging from 95 to 80 mol% are presented. Amorphous gel-derived samples were obtained, characterized by a very high degree of silicon cross-linking with presence of SiONb bridges, allowing phosphorus to be stably anchored to the matrix through NbOP bonds.

The morphology (surface area and porosity), the intrinsic acidity (density and average strength of the surface acid sites, by PEA-TPD in a TGA-DSC coupled instrument), and the nature of the acid sites were determined. The LAS/BAS ratio has been evaluated by FTIR of adsorbed pyridine in absence/presence of water to discover the differences between the intrinsic and effective nature of the acid sites. The amount of acid sites decreased with the Nb-content in the samples as well as the surface average acid strength. Both LAS and BAS are maintained in the presence of water, even if BAS are predominant in any case.

The catalytic performances of the Nb-P-Si samples in the reaction of inulin hydrolysis were investigated in aqueous solution under mild conditions (below 100 °C).

Nb / P = 1且通式x Nb ₂ O ₅ · x P ₂ O ₅ ·（100–2 x）的由铌-磷-硅Nb-P-Si组成的氧化物三元材料的表面和催化性能·给出了x  ＝ 2.5、5、7.5和10的SiO ₂，且Si含量为95-80mol％。获得了无定形的凝胶样品，其特征在于非常高的硅交联度和Si O Nb桥的存在，使磷通过Nb O P键稳定地锚定在基质上。

确定了形态（表面积和孔隙率），固有酸度（表面酸性位点的密度和平均强度，通过TGA-DSC耦合仪器中的PEA-TPD）和酸性位点的性质。通过在水存在/不存在下吸附的吡啶的FTIR对LAS / BAS比率进行了评估，以发现酸性位点固有和有效性质之间的差异。酸位的数量随样品中Nb含量以及表面平均酸强度的增加而降低。即使在任何情况下，BAS都是主要的，但LAS和BAS都在水的存在下进行维护。

在温和的条件下（低于100°C）研究了Nb-P-Si样品在菊粉水解反应中的催化性能。