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A remarkable Mo doped Ru catalyst for hydrogen generation from sodium borohydride: the effect of Mo addition and estimation of kinetic parameters
Reaction Kinetics, Mechanisms and Catalysis ( IF 1.8 ) Pub Date : 2020-11-04 , DOI: 10.1007/s11144-020-01884-8
Tulin Avci Hansu , Omer Sahin , Aykut Caglar , Hilal Kivrak

At present, carbon nanotube supported monometallic Ru at 3 wt% Ru loading (3% Ru/CNT) per gram support and bimetallic RuMo at 3 wt% Ru loading per gram support (3% Ru-Mo/CNT) at varying Ru:Mo atomic ratios are synthesized via sodium borohydride (NaBH4) reduction method to investigate their performance towards NaBH4 hydrolysis. These monometallic Ru/CNT and bimetallic Ru:Mo/CNT catalysts prepared at varying Ru:Mo atomic ratios are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy-energy dispersive X-ray analysis (SEM–EDX), and transmission electron microscopy (TEM). Characterization results reveal that Mo addition to Ru alters the electronic state of the catalysts. The NaOH concentration, the amount of catalyst, the NaBH4 concentration and the temperature parameters that affect the hydrolysis rate of this synthesized and developed catalyst were examined. The kinetic calculations of these parameters related to the order of the reaction were determined. Under optimum conditions catalyst hydrogen production rate was found to be 82,758.43 ml H2 g−1cat min−1. The reaction order (n) and activation energy (Ea) are determined as 0.42 and 35.11 kJ mol−1. Ru:Mo/CNT catalyst is a novel and promising catalyst for hydrogen generation from NaBH4.



中文翻译:

出色的Mo掺杂Ru催化剂,可从硼氢化钠产生氢:Mo的添加和动力学参数估计

目前,碳纳米管以每克载体3 wt%的Ru负载量(3%Ru / CNT)负载单金属Ru,每克载体以3 wt%Ru负载的双金属RuMo(3%Ru-Mo / CNT)负载Ru:Mo通过硼氢化钠(NaBH 4)还原法合成原子比,以研究其对NaBH 4水解的性能。以不同的Ru:Mo原子比制备的这些单金属Ru / CNT和双金属Ru:Mo / CNT催化剂的特征在于X射线衍射(XRD),X射线光电子能谱(XPS),扫描电子显微镜-能量色散X射线分析(SEM-EDX)和透射电子显微镜(TEM)。表征结果表明,向Ru中添加Mo会改变催化剂的电子状态。NaOH浓度,催化剂用量,NaBH研究了影响该合成和开发的催化剂的水解速率的4种浓度和温度参数。确定了与反应顺序有关的这些参数的动力学计算。在最佳条件下,发现催化剂氢气产生速率为82,758.43 ml H 2 g -1 cat min -1。反应阶数(n)和活化能(E a)被确定为0.42和35.11 kJ mol -1。Ru:Mo / CNT催化剂是从NaBH 4产生氢的新颖且有希望的催化剂。

更新日期:2020-11-06
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