Preparation of Ultrafine RuO[sub 2]-SnO[sub 2] Binary Oxide Particles by a Sol-Gel Process
Preparation of Ultrafine RuO[sub 2]-SnO[sub 2] Binary Oxide Particles by a Sol-Gel Process
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DOI：
10.1149/1.2054903
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发表时间：
1994
影响因子：
3.9
通讯作者：
Minoru Ito
中科院分区：
文献类型：
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作者：
Minoru Ito
采用溶胶-凝胶法制备了RuQ-SnO_2二元氧化物超微粒子。在450 ℃下煅烧的二元氧化物由两个金红石型氧化物相组成：RuQ和（Ru，Sn）O2。Ru-rieh氧化物中也发现了Ru金属相。RuOz-SnO 2二元氧化物涂层钛电极是氯碱工业中重要的阳极。事实上，SnO 2主要用作添加剂，即作为第三组分来增加对氯的选择性。3-5这些DSA型涂层通常通过涂覆在钛基材上的金属氯化物和醇盐涂层的热分解来制备。各种微观分析表明，这些DSA型电极的表面组成和特征是不均匀的。6电极的均匀涂层需要涂覆分散的细颗粒，以澄清这些电催化剂的物理性质，以便更广泛地应用。溶胶-凝胶法是制备混合氧化物微粒的几种先进制备技术之一。最近，作者通过溶胶-凝胶法制备了RuQ-TiQ二元氧化物的超细氧化物颗粒，并对其进行了表征。对于RuQ-TiQ二元氧化物体系中的富Ru组分，已经获得了钌和钛氧化物的金红石型固溶体。
Ultrafine particles of RuQ-SnO2 binary oxides have been prepared by a sol-gel process consisting of hydrolysis and condensation of metal alkoxide alcoholic solutions. The binary oxides calcined at 450 C were composed of two rutile-type oxide phases: RuQ and (Ru, Sn) O2. The Ru metallic phase also was found in the Ru-rieh oxides.RuOz-SnO2 binary oxide coated titanium electrodes are important anodes in the chlor-alkali industryY In fact, SnO2 is mostly used as an additive, ie, as a third component to increase the selectivity toward chlorine. 3-5 These DSA-type coatings are usually prepared by thermal decomposition of metal chloride and alkoxide coatings painted onto titanium substrates. A variety of mieroanalyses have revealed that the surface composition and features of these DSA-type electrodes are not homogeneous. 6 Homogeneous coatings of electrodes coating dispersed fine particles are needed to clarify the physical properties of these electrocatalysts for more extensive application. The sol-gel process is one of several advanced preparation techniques used to produce mixed oxide fine particles. Recently, the authors have prepared ultrafine oxide particles of the RuQ-TiQ binary oxides by a sol-gel process and characterized them in phase] For the Ru-rich composition in the RuQ-TiQ binary oxide system, rutile-type solid solutions of ruthenium and titanium oxides have been obtained.