Abstract Ethylbenzene oxidative dehydrogenation (EB ODH) reactions with nanocarbon as catalysts exhibit promising prospects as green and sustainable chemical industrial process. The present work reported the design and synthesis of polydopamine hollow nanospheres (PDA HNSs) carbon-based catalysts via a polymerization & carbonization method using silica as hard templates. The proposed PDA HNSs catalysts exhibit a high surface area of 641.6 m2 g−1 with the surface oxygen and nitrogen content up to 6.3 % and 9.5 %, respectively. It shows exceptional catalytic performance towards EB ODH reaction, which is even better than the commercial nanocarbon materials, such as carbon nanotubes, from the viewpoint of the apparent activity (EB conversion at 61.6 %), the intrinsic activity (7.7×10−4 s-1) and the activation energy (42.5 KJ/mol), although they share the same catalytic active sites of ketonic carbonyl/quinone groups and reaction kinetics, such as rate determining step and reaction orders.

中文翻译：

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纳米碳氧化脱氢：聚多巴胺空心纳米球作为新型高效催化剂

摘要 以纳米碳为催化剂的乙苯氧化脱氢（EB ODH）反应作为绿色和可持续的化学工业过程具有广阔的前景。目前的工作报告了通过使用二氧化硅作为硬模板的聚合和碳化方法设计和合成聚多巴胺中空纳米球 (PDA HNSs) 碳基催化剂。所提出的 PDA HNSs 催化剂具有 641.6 m2 g-1 的高表面积，表面氧和氮含量分别高达 6.3% 和 9.5%。它对 EB ODH 反应表现出优异的催化性能，从表观活性（EB 转化率为 61.6%）、固有活性（7.7×10-4 s）的角度来看，甚至优于商业纳米碳材料，如碳纳米管。 -1) 和活化能 (42.5 KJ/mol)，