一系列M/NiCo铁氧体(M:Pt,Pd,Ru,成功合成了Rh)纳米粒子,通过简单的溶胶-凝胶自动燃烧,然后是浸渍还原法,作为NaBH4水解制氢的催化剂。所有合成样品均通过XRD表征,N2吸附-解吸法,ICP-OES,FE-SEM,EDX分析与其他样品相比,观察到Rh/NiCo-铁氧体样品表现出更高的颗粒分布和表面积。为了评估氢气产生速率,水解在35°C的温度下进行,含有5重量%的水溶液。%NaBH4和3wt。%NaOH。实验结果表明,Rh/NiCo铁氧体样品表现出优异的产氢率,平均值为11,667mL/min。gcat,与研究的其他样本相比。增强的催化性能可能是其高活性的原因。此外,硼氢化钠在Rh/NiCo铁氧体样品上的水解活化能为54.5kJ/mol,低于许多铁氧体基催化剂的活化能。此外,Rh/NiCo铁氧体样品的可重复使用性测试表明,由于形态的改变和活性相数量的减少,4次回收实验后催化活性下降。
A series of M/NiCo-
Ferrite (M: Pt, Pd, Ru, and Rh) nanoparticles were successfully synthesized, through a facile sol-gel auto-combustion followed by impregnation-reduction approach, as a catalyst for hydrogen generation from hydrolysis of NaBH4. All synthesized samples were characterized by XRD, N2 adsorption-desorption method, ICP-OES, FE-SEM, and EDX analysis. Compared to the other samples, it was observed that the Rh/NiCo-
Ferrite sample exhibited higher particle distribution and surface area. To evaluate the hydrogen generation rate, the hydrolysis was carried out at a temperature of 35 °C, with an aqueous solution containing 5 wt.% NaBH4 and 3 wt.% NaOH. The experimental findings indicate that the Rh/NiCo-
Ferrite sample exhibited a superior rate of hydrogen generation, with an average value of 11,667 mL/min.gcat, compared to the other samples studied. Enhanced catalytic properties may be responsible for its high activity. In addition, the activation energy of hydrolysis of sodium borohydride over the Rh/NiCo-
Ferrite sample was 54.5 kJ/mol which is lower than the activation energy of many
Ferrite-based catalysts. Moreover, the re-usability test of the Rh/NiCo-Ferrite sample denoted a decline in the catalytic activity after 4 recycling experiments due to the alterations in morphology and the reduction in the quantity of active phase.