Role of Pyrophosphate Source for Improving Proton Conductivity and Stability of Sodium Dihydrogen Phosphate

IF 1.8 3区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Russian Journal of Inorganic Chemistry Pub Date : 2024-08-29 DOI:10.1134/s0036023624601338

Pushpanjali Singh, Amit K. Sharma, Pawan Kumar, Dharm Veer, Devendra Kumar, Deshraj Singh, Ram S. Katiyar

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Abstract

Solid acid composites of (1 – x)NaH₂PO₄/xCeP₂O₇ (x = 0.1–0.4) with different molar weight ratio of NaH₂PO₄ (SDP) and CeP₂O₇ were synthesized and characterized. The characterization of solid acid composites was carried out to determine the structures, thermal stability, and conductivity, utilizing X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM) with energy dispersive X-ray analysis (EDX), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and conductivity measurements. The electrolyte pellets of composite powder were prepared for the determination of ionic conductivity. The presence of CeP₂O₇ in the composite had a large impact on the conductivity measurements and increased the ionic conductivity of NaH₂PO₄. The thermal stability of the solid acid composites for dehydration, melting, and decomposition was investigated in the temperature range of 50 to 500°C under open atmospheric environments.

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焦磷酸源对提高磷酸二氢钠质子传导性和稳定性的作用

摘要合成并表征了不同摩尔重量比的 NaH2PO4 (SDP) 和 CeP2O7 的 (1 - x)NaH2PO4/xCeP2O7 (x = 0.1-0.4) 固体酸复合材料。利用 X 射线粉末衍射 (XRD)、傅立叶变换红外光谱 (FTIR)、场发射扫描电子显微镜 (FE-SEM)、能量色散 X 射线分析 (EDX)、热重分析 (TGA)、差热分析 (DTA) 和电导率测量，对固体酸复合材料的结构、热稳定性和电导率进行了表征。为测定离子电导率，制备了复合粉末的电解质颗粒。复合材料中 CeP2O7 的存在对电导率测量有很大影响，并增加了 NaH2PO4 的离子电导率。研究了固体酸复合材料在开放大气环境下 50 至 500°C 温度范围内脱水、熔化和分解的热稳定性。

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来源期刊

Russian Journal of Inorganic Chemistry 化学-无机化学与核化学

CiteScore

3.10

自引率

38.10%

发文量

237

审稿时长

3 months

期刊介绍： Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.