Following the thermal reductive method, the synthesis of nanoparticles stabilized by polyvinylpyrrolidone was performed using ethylene glycol as a reductant and solvent. The PVP-capped platinum and palladium were well-dispersed and stable for more than 3 months, and their average sizes were 2.53 ± 0.07 nm and 4.13 ± 0.14 nm. By means of inductively coupled plasma mass spectroscopy (ICP-MS) analysis, the amount of colloidal metal nanoparticles was found to be 6.38 wt% and 5.93 wt% for platinum and palladium, respectively. The PVP-capped Pt and Pd nanocatalysts were evaluated for the hydrogenolysis of azo dyes using methyl orange as a model compound in the presence of borohydride as a reductant. Substrates adsorption on the nanocatalysts surface constituted the rate-determining step of the catalytic reduction. The Langmuir–Hinshelwood approach was applied to interpret the interface interaction between nanocatalyst and substrates. The activation energy was 65.70 ± 4.49 kJ mol⁻¹ and 89.27 ± 2.12 kJ mol⁻¹ using Pt and Pd nanocatalysts, respectively.

继热还原法之后，使用乙二醇作为还原剂和溶剂进行聚乙烯吡咯烷酮稳定化的纳米颗粒的合成。PVP封端的铂和钯分散良好且稳定3个月以上，其平均尺寸为2.53±0.07 nm和4.13±0.14 nm。通过电感耦合等离子体质谱法（ICP-MS）分析，发现胶体金属纳米粒子的量对于铂和钯分别为6.38重量％和5.93重量％。在存在硼氢化物作为还原剂的情况下，使用甲基橙作为模型化合物，对PVP封端的Pt和Pd纳米催化剂的偶氮染料进行氢解进行了评估。纳米催化剂表面上的底物吸附构成了催化还原的速率确定步骤。Langmuir-Hinshelwood方法用于解释纳米催化剂和底物之间的界面相互作用。活化能为65.70±4.49 kJ mol分别使用Pt和Pd纳米催化剂的^-1和89.27±2.12 kJ mol ^-1。