Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua road 72, Shenyang, 110016, P. R. China.
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, P. R. China.
ChemSusChem. 2018 Feb 9;11(3):536-541. doi: 10.1002/cssc.201702178. Epub 2018 Jan 15.
Activated carbon (AC) has been widely used in the catalysis field because of its low cost, scalable production, high specific surface area, and abundant exposed edge. Because of the amorphous structure, traditional AC is unstable in presence of O at high temperature, which hinders the application of AC catalysts in oxidative dehydrogenation (ODH) of alkanes. Here, partially graphitic AC decorated with few-layer graphene is facilely fabricated by simple high-temperature calcination. The graphitic transformation significantly enhances the antioxidation property, long-term stability of AC during the ODH reaction, and especially dramatically increases the graphitic edge areas in which the active ketonic carbonyl groups are selectively formed in ODH reactions. A high reactivity with 41.5 % selectivity and 13.2 % yield to C alkenes were obtained at 450 °C over the optimized catalyst, which is superior to all the previously reported carbon catalysts and shows a great potential for industrial application.
活性炭（AC）因其成本低、可规模化生产、比表面积高、丰富的边缘暴露等特点，被广泛应用于催化领域。由于其无定形结构，在高温下存在 O 时，传统的 AC 不稳定，这阻碍了 AC 催化剂在烷烃氧化脱氢（ODH）中的应用。在这里，通过简单的高温煅烧，制备了一种部分石墨化的 AC，表面修饰有少层石墨烯。石墨化转变显著提高了 AC 在 ODH 反应中的抗氧化性和长期稳定性，特别是大大增加了在 ODH 反应中选择性形成的活性酮羰基的石墨边缘面积。在优化的催化剂上，在 450°C 下可获得 41.5%的高反应性和 13.2%的 C 烯烃选择性和收率，优于所有先前报道的碳催化剂，显示出巨大的工业应用潜力。
