Highly monodisperse RuCo nanoparticles decorated on functionalized multiwalled carbon nanotube with the highest observed catalytic activity in the dehydrogenation of dimethylamine−borane
Highly monodisperse RuCo nanoparticles decorated on functionalized multiwalled carbon nanotube with the highest observed catalytic activity in the dehydrogenation of dimethylamine−borane
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DOI：
10.1016/j.ijhydene.2017.06.032
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发表时间：
2017-09
影响因子：
7.2
通讯作者：
B. Sen;S. Kuzu;Enes Demir;Suleyman Akocak;F. Sen
中科院分区：
文献类型：
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作者：
B. Sen;S. Kuzu;Enes Demir;Suleyman Akocak;F. Sen
在此，我们报告了一种更好的二甲胺-硼烷脱氢催化剂的发现，它比迄今为止报道的二甲胺-硼烷脱氢的最佳非均相催化剂（Celik B.; Yıldız Y.; Sert H.; Erken E.; Koskun Y.; and Sen F.; RSC Advances 2016, 6, 24097-24102）更活跃。该催化剂体系由分散良好的钌钴纳米材料装饰在功能化多壁碳纳米管（3.72±0.37 nm）上，采用超声双还原法制备。采用UV-Vis、XPS、TEM、XRD、HR-TEM-EELS等分析技术，对催化剂的形貌和结构组成进行了全面表征。该催化剂在室温条件下对DMAB脱氢偶联反应具有较高的催化活性（775.28 h−1）和较低的催化值（13.72±2 kJ/mol），生成100%的循环产物（Me2NBH2）2。此外，RuCo@ƒ-MWCNT催化剂在二甲胺-硼烷脱氢反应中具有良好的可重复使用性、高的催化性能和优异的耐久性。
Herein we report the discovery of a superior dimethylamine−borane dehydrogenation catalyst, more active than the prior best heterogeneous catalyst (Celik B.; Yıldız Y.; Sert H.; Erken E.; Koskun Y.; and Sen F.; RSC Advances 2016, 6, 24097–24102) reported to date for the dehydrogenation of dimethylamine−borane. The new catalyst system consists of well dispersed ruthenium-cobalt nanomaterials decorated on functionalized multiwalled carbon nanotube (3.72 ± 0.37 nm) prepared by the use of the ultrasonic double reduction method. The morphology and structure composition of catalytically effective, recyclable and reproducible catalysts were fully characterized by using different analytical techniques such as UV–Vis, XPS, TEM, XRD and HR-TEM-EELS analyses. This catalyst showed best ever catalytic activity with a very high turnover frequency (775.28 h−1) and low Eavalue of 13.72 ± 2 kJ/mol for DMAB dehydrocoupling in the ambient conditions yielding 100% of the cyclic product (Me2NBH2)2at room temperature. Besides, RuCo@ƒ-MWCNT catalyst exhibits great reusability, high catalytic performance and excellent durability for dimethylamine-borane dehydrogenation reaction.