PdAg/MIL-101(Fe)催化NaBH4水解制氢

将PdAg纳米颗粒负载到MIL-101(Fe)上作为硼氢化钠水解制氢的催化剂。采用XRD、TEM、HRTEM、XPS、SEM和EDS等方法对催化剂PdAg/MIL-101(Fe)的结构进行了表征。PdAg/MIL-101(Fe)在硼氢化钠水解制氢中表现出较高的催化活性,在温和的条件下水解制氢最大速率为2.60 L·min^–1·g_cat.^–1。详细研究了反应温度、催化剂用量、氢氧化钠和硼氢化钠浓度对该催化反应的影响规律。结果发现,制氢速率很大程度上依赖于反应温度,随着反应温度的升高,制氢速率明显增加,制氢的表观活化能为54.89 kJ·mol^–1。该催化剂重用性能好,5次循环后仍能保持活性。

PdAg/MIL-101(Fe)catalysts for hydrogen generation from the hydrolysis of sodium borohydride

PdAg nanoparticles supported on MIL-101(Fe)has been synthesized as catalysts for hydrogen generation from catalytic hydrolysis sodium borohydride.The structure morphology and properties of PdAg/MIL-101(Fe)are characterized by XRD,TEM,HRTEM,XPS,SEM and EDS methods.The PdAg/MIL-101(Fe)exhibits efficiently catalytic activity in hydrolysis sodium borohydride.Maximum hydrogen generation rate is calculated to be 2.60 L·min^–1·g_cat.^–1 at mild temperature.Furthermore,the effects of temperature,catalyst amount,and concentration of NaOH and NaBH 4 on the process of H 2 generation are investigated in detail.It is found that the hydrogen generation rate is largely dependent on the hydrolysis temperature,with the increasing of reaction temperature,hydrogen generation rate obviously increases,and the apparent activation energy is estimated to be 54.89 kJ·mol^–1 for the hydrogen generation.The catalyst also shows good reusability and maintained its initial activity after 5 cycles.