Pd/BiOCl高效室温催化甲醛产氢性能研究

利用浸渍-还原法制备Bi OCl纳米片负载的钯纳米颗粒催化剂(Pd/Bi OCl),对室温催化氧化HCHO产氢性能进行了研究,并与纯Pd纳米颗粒催化效果进行了对比.研究结果表明,Pd/Bi OCl催化剂在有效降低贵金属Pd用量情况下(仅为2%wt),仍表现出比纯Pd纳米颗粒更高的催化HCHO产氢的性能.此外,通过进一步优化甲醛浓度、氢氧化钠浓度、氧气浓度和反应温度等参数,Pd/Bi OCl催化氧化HCHO产氢速率最高可达到200 m L/(min*gcatalyst).进一步研究结果表明,Pd/Bi OCl催化HCHO产氢反应的活化能仅为15.2 k J/mol,远低于无催化剂条件下甲醛产氢的活化能65 k J/mol.

Performance of Highly Efficient Hydrogen Production by Alkaline Aldehyde Solutions over Pd/BiOCl at Room Temperature

The catalyst Pd/BiOCl was prepared by the impregnation-reduction method, the hydrogen production performance was studied on the room temperature. By comparing the pure Pd nanoparticles and Pd/BiOCl catalyze the formaldehyde to produce hydrogen under the same response condition, and Pd/BiOCl has better catalyzed performance. By further optimizing the reaction parameters such as the amount of the palladium in BiOCl, formaldehyde concentrations, NaOH concentrations, oxygen concentrations and temperature, the hydrogen generation rate over Pd/BiOCl was up to 200 mL/(min*gcatalyst). The activation energy for the hydrogen generation reaction was calculated to be 15.2 kJ/mol, which was much lower than the previously reported value of 65 kJ/mol, for no catalyst participation.