Liu Xiaogang, Chen Wenjie, Zhang Xin
College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.
Nanomaterials (Basel). 2022 Mar 2;12(5):843. doi: 10.3390/nano12050843.
Research on catalytic oxidation in a promising but mild manner to remove formaldehyde and produce hydrogen is rarely reported. Here, the use of the TiAlC MAX phase as support for palladium nanoparticles was explored for the hydrogen generation from alkaline formaldehyde solution at room temperature. The results showed that TiAlC/Pd catalyst with 3 wt% Pd loading had a much higher capability for hydrogen production than conventional Pd nanoparticles. In addition, by further optimizing the formaldehyde concentration, NaOH concentration, and the reaction temperature, the hydrogen production rate could be further increased to 291.6 mL ming. Moreover, the obtained apparent activation energy of the TiAlC/Pd catalyzed hydrogen production reaction is 39.48 kJ mol, which is much lower than that of the literature results (65 kJ mol). The prepared TiAlC/Pd catalysts as well as the catalytic process could act as a "two birds with one stone" effect, that is, they not only eliminate noxious formaldehyde but also generate clean hydrogen.
关于以一种有前景但温和的方式进行催化氧化以去除甲醛并产生氢气的研究鲜有报道。在此，探索了使用TiAlC MAX相作为钯纳米颗粒的载体，用于在室温下从碱性甲醛溶液中产生氢气。结果表明，钯负载量为3 wt%的TiAlC/Pd催化剂比传统钯纳米颗粒具有更高的产氢能力。此外，通过进一步优化甲醛浓度、氢氧化钠浓度和反应温度，产氢速率可进一步提高至291.6 mL min⁻¹。而且，所获得的TiAlC/Pd催化产氢反应的表观活化能为39.48 kJ mol⁻¹，远低于文献结果（65 kJ mol⁻¹）。所制备的TiAlC/Pd催化剂以及催化过程具有“一石二鸟”的效果，即它们不仅能消除有害的甲醛，还能产生清洁的氢气。
