Al-Hameedawi Doaa, Karaboğa Seda, Morkan İzzet Amour
Department of Chemistry, Bolu Abant İzzet Baysal University, Bolu, Turkey.
Turk J Chem. 2023 Feb 21;47(2):436-447. doi: 10.55730/1300-0527.3550. eCollection 2023.
Cu NPs supported on tungsten (VI) oxide (WO) were in situ generated from the reduction of Cu ions during dehydrogenation of dimethylamine borane (DMAB). The Cu/WO NPs displayed tangible catalytic activity in H (g) releasing reaction and they were identified by using advanced techniques. Cu/WO NPs were found as active catalyst providing one equiv. H(g) per mole of DMAB. The results from TEM images display the formation of Cu NPs with an average particle size of 4.6 ± 1.0 nm on the surface of WO. Moreover, Cu/WO NPs with various metal loadings were prepared and tested as catalyst in dehydrogenation reaction to find the optimum metal loading on WO support. The highest H generation rate was achieved for 4.0% wt. Cu/WO catalyst with TOF value of 39 h in the reaction conditions. Additionally, effect of various catalyst concentration and temperature is discussed on the reaction kinetics for reaction catalyzed by Cu/WO NPs.
负载在氧化钨（WO）上的铜纳米颗粒（Cu NPs）是在二甲胺硼烷（DMAB）脱氢过程中通过铜离子的还原原位生成的。Cu/WO NPs在氢气（H₂）释放反应中表现出显著的催化活性，并通过先进技术对其进行了鉴定。发现Cu/WO NPs是一种活性催化剂，每摩尔DMAB可提供一当量的H₂（g）。透射电子显微镜（TEM）图像结果显示，在WO表面形成了平均粒径为4.6±1.0 nm的Cu NPs。此外，制备了具有不同金属负载量的Cu/WO NPs，并作为脱氢反应的催化剂进行测试，以找到WO载体上的最佳金属负载量。在反应条件下，4.0% wt.的Cu/WO催化剂实现了最高的氢气生成速率，其转化频率（TOF）值为39 h⁻¹。此外，还讨论了各种催化剂浓度和温度对Cu/WO NPs催化反应动力学的影响。
