柱状Co_3O_4催化剂的乏风催化燃烧性能（英文）
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摘要
通过两步法成功合成了由纳米粒子组装成的柱状Co_3O_4。第一步是通过简单的冷凝回流法合成柱状CoC2O4·2H2O。第二步将所制备的柱状CoC2O4·2H2O在350℃下煅烧2 h,使其分解形成Co_3O_4而不破坏原始形貌。通过粉末X射线衍射(PXRD),X射线光电子能谱(XPS),氮气吸附-脱附,扫描电镜(SEM),高分辨率透射电子显微镜(HRTEM)和H2程序升温还原(H2-TPR)表征柱状Co_3O_4的物化性质。结果表明,柱状Co_3O_4对乏风甲烷燃烧的催化活性远远高于商业Co_3O_4。柱状Co_3O_4优异的催化性能可能归因于其表面较高的Co3+含量,较高的表面吸附氧和大量暴露的{111}晶面族。
The Co_3O_4 rectangular prism assembled by nanoparticles has been successfully fabricated via a two-step method. The first step involves the synthesis of CoC_2O_4·2H_2O rectangular prism by a simple condensing reflux method.The second step includes the calcination of the as-prepared CoC_2O_4·2H_2O rectangular prism at 350 ℃ for 2 h, causing its decomposition to form Co_3O_4 rectangular prism without destructing of the original morphology. The mechanical properties were characterized by powder X-ray diffraction(PXRD), X-ray photoelectron spectroscopy(XPS), nitrogen adsorption-desorption, scanning electron microscopy(SEM), high-resolution transmission electron microscopy(HRTEM), and H2 temperature-programmed reduction(H2-TPR). The results showed that the catalytic activity of Co_3O_4 rectangular prism for the combustion of ventilation air methane was higher than that of commercial Co_3O_4. The superior catalytic performance could be attributed to the high surface Co3+content, high surface adsorbed oxygen content, and exposing the {111} planes.
The Co_3O_4 rectangular prism assembled by nanoparticles has been successfully fabricated via a two-step method. The first step involves the synthesis of CoC_2O_4·2H_2O rectangular prism by a simple condensing reflux method.The second step includes the calcination of the as-prepared CoC_2O_4·2H_2O rectangular prism at 350 ℃ for 2 h, causing its decomposition to form Co_3O_4 rectangular prism without destructing of the original morphology. The mechanical properties were characterized by powder X-ray diffraction(PXRD), X-ray photoelectron spectroscopy(XPS), nitrogen adsorption-desorption, scanning electron microscopy(SEM), high-resolution transmission electron microscopy(HRTEM), and H2 temperature-programmed reduction(H2-TPR). The results showed that the catalytic activity of Co_3O_4 rectangular prism for the combustion of ventilation air methane was higher than that of commercial Co_3O_4. The superior catalytic performance could be attributed to the high surface Co3+content, high surface adsorbed oxygen content, and exposing the {111} planes.
引文
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