Insights into the Low-temperature Synthesis of LaCoO3 Derived from Co(CH3COO)2 Via Electrospinning f

• 作 者: Yingbin Zheng Xiaoshan Feng Daifeng Lin Enhui Wu Yongjin Luo Yufeng You Baoquan Huang Qingrong Qian Qinghua Chen
• 机 构: Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujia
• 出 处: 中国化学（英文版）
• 发表日期: 2020年2期

A series of electrospun LaCoO3 perovskites derived from CoX2 (X =CH3COO-,NO3-) were prepared and investigated for total propane oxidation.It is shown that pure rhombohedral perovskite LaCoO3 from Co(CH3COO)2 can be obtained at a relatively low temperature,400 ℃,benefitting from the complexation effect of CH3COO-.On the other hand,CH3COO-can accelerate the complete decomposition of polymer.The low-temperature process can protect LaCoO3 nanoparticles from growing up.As a result,Co(CH3COO)2-derived catalysts exhibit better propane oxidation activity than the ones suffered the same thermal treatment by using Co(NO3)2.XPS and H2-TPR analysis provide that there is subtle change in Co3+/Co2+ on bulk/surface of Co(CH3COO)2-derived catalysts prepared at different temperatures,giving rise to similar propane oxidation activities.Moreover,the result of cyclic stability test over 400 ℃ obtained catalyst shows little deactivation,demonstrating a good thermal stability.Our study can provide a feasible route for energv-saving synthesis of LaCoO3 catalyst applied in the catalytic oxidation of volatile organic compounds (VOCs).