Abstract The surface morphology and chemical composition of the MgAl- and MgGa-layered hydroxides as supports precursors were studied by SEM and EDX in all steps of the platinum catalysts Pt/Mg(Ga, Al)Ox synthesis. The study revealed a higher structural stability of Ga-containing samples in comparison with Al-containing analogs, which shows up as their morphological invariability during calcination, activation of layered double hydroxides, and anchoring of the metal complex. A similar Mg/M3+ ratio of metals estimated by both the volumetric method and EDX confirms that a uniform distribution of metals in the support is retained during the catalyst synthesis; this will ensure the specified adsorption and acid-base properties of Pt/MgAlOx and Pt/MgGaOx, which are the promising catalytic systems for dehydrogenation of light and higher alkanes.

中文翻译：

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铂催化剂Pt/Mg(Al, Ga)O x 合成不同步骤中MgAl-和MgGa-层状氢氧化物表面形貌和化学成分的SEM研究

摘要 通过SEM和EDX研究了铂催化剂Pt/Mg(Ga, Al)Ox合成各步骤中MgAl和MgGa层状氢氧化物作为载体前驱体的表面形貌和化学成分。该研究表明，与含铝类似物相比，含 Ga 样品具有更高的结构稳定性，这表现为它们在煅烧、层状双氢氧化物的活化和金属配合物的锚定过程中的形态不变性。通过体积法和 EDX 估计的金属的相似 Mg/M3+ 比证实了在催化剂合成过程中保持了载体中金属的均匀分布；这将确保 Pt/MgAlOx 和 Pt/MgGaOx 具有特定的吸附和酸碱特性，它们是用于轻烃和高级烷烃脱氢的有前景的催化体系。