Microstructural Exploration of the High Capacitance in RuO2-ZrO2 Coating

• 作者: MA Ji-Dong WU Yun-Miao JIANG Chun-Hai ZHANG Hou-An ZHU Jun-Qiu
• 来源期刊: 结构化学
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: organic and inorganic structural cbemistry
• 页码范围: 125-135
• 页数: 11页
• 语种: 英文
• DOI: 10.14102/j.cnki.0254-5861.2011-2781

摘要

A high capacitance RuO2-ZrO2 coating was prepared by thermal decomposition method.Extended X-ray absorption fine structure(EXAFS),X-ray diffraction(XRD),high-resolution transmission electron microscope(HRTEM)and ab initio calculations were applied to understand the role of the microstructure in the acquisition of high specific capacitance of RuO2-based oxides.The results show that the RuO2-ZrO2 oxide prepared at critical crystallization temperature can be considered to be quasi-amorphous or microcrystalline(A short-range ordered crystal structure can be seen from the TEM image,but no diffraction peaks can be seen from the XRD diffraction patterns).And this RuO2-ZrO2 was identified as a solid solution with high solid solubility.It referred to herein as a quasi-amorphous solid solution.Such a special microstructure was conducive for"synergistic catalysis"owing to the cationic interaction and thus could gain high"active site density"and high"active surface",thus developing high specific capacitance.