Cesium salts of phosphotungstic acid Cs_xH_1−xPW₁₂O₄₀ were synthesized in the pH range of the initial solutions are from 0 to 4. It has been shown that the Keggin structure is preserved in the entire pH range without the presence of other anions. At pH = 2.0, there is a sharp change in the composition of the cationic sublattice, particle sizes, specific surface area of the obtained particles, and total pore volume. At these pH values, the size of the crystallites forming particles of the salts obtained remains almost unchanged with a change in pH. In the obtained compounds, water does not enter the salt structure and its content correlates with the pore size inside the particles. The dependences of proton conductivity, conductivity activation energy, and electrocatalytic properties of the obtained cesium salts can also be divided into two regions of pH influence with a transition of pH = 2.0.

磷钨酸铯盐Cs _x H _1−x PW ₁₂ O ₄₀在初始溶液的pH范围为0至4下合成的Keggin。已显示，Keggin结构在整个pH范围内得以保留，而没有其他阴离子的存在。在pH = 2.0时，阳离子亚晶格的组成，粒度，所得颗粒的比表面积和总孔体积发生急剧变化。在这些pH值下，随着pH的变化，形成所形成的盐的颗粒的微晶的尺寸几乎保持不变。在获得的化合物中，水不进入盐结构，并且其含量与颗粒内部的孔径相关。所获得的铯盐的质子电导率，电导活化能和电催化性能的依赖性也可以分为两个pH值影响区域，其中pH ＝ 2.0。