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Catalytic Combustion of Toluene over Cobalt Oxides Supported on Graphitic Carbon Nitride (CoOx/g-C3N4) Catalyst
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-08-27 , DOI: 10.1021/acs.iecr.8b02625
Dongmou Luo 1 , Shusen Liu 1, 2 , Junjie Liu 3 , Jinxian Zhao 1 , Chao Miao 1 , Jun Ren 1
Affiliation  

Graphitic carbon nitride (g-C3N4) supported CoOx catalysts were prepared by the impregnation method and comprehensively characterized by XRD, N2 physisorption, TEM, H2-TPR, and XPS. The catalytic performance tested by catalytic combustion of toluene indicates that 10% CoOx/g-C3N4 catalyst exhibits the highest activity, achieving a toluene conversion of 90% at a temperature of approximately 279 °C, compared with other CoOx catalysts supported on SBA-15, γ-Al2O3 and activated carbon (AC). The specific structure of g-C3N4 made it a N and electron-rich material, which might be the reason for the existence of Co3O4 active phase, high surface Co3+ content and high density of surface oxygen adsorption species, and facile reducibility of Co3+. Moreover, no significant decrease in catalytic efficiency is observed over different temperature stages on the 10% CoOx/g-C3N4 sample, which indicates that the catalyst’s stability is excellent under the conditions required for toluene combustion.

中文翻译:

石墨氮化碳(CoOx / gC 3 N 4)负载的氧化钴催化甲苯燃烧。

通过浸渍法制备了石墨化的氮化碳(gC 3 N 4)担载的CoOx催化剂,并通过XRD,N 2物理吸附,TEM,H 2 -TPR和XPS对其进行了全面表征。通过甲苯催化燃烧测试的催化性能表明,与负载在SBA-上的其他CoOx催化剂相比,10%CoOx / gC 3 N 4催化剂表现出最高的活性,在约279°C的温度下达到90%的甲苯转化率。 15,在γ-Al 2 ö 3和活性炭(AC)。gC 3 N 4的具体结构使其成为一种富含N和电子的材料,这可能是存在Co 3 O 4活性相,高表面Co 3+含量和高表面氧吸附物种密度以及Co 3+易还原性的原因。此外,在10%CoOx / gC 3 N 4样品上,在不同温度阶段,未观察到催化效率的显着降低,这表明在甲苯燃烧所需的条件下,催化剂的稳定性极好。
更新日期:2018-08-27
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