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| 过渡金属对Pd/M-NF电极电氧化催化性能的提升 |
| Improvement of electrooxidation catalytic performance of Pd/M-NF electrode by using transition metals |
| 投稿时间：2022-04-23 |
| DOI： |
| 中文关键词: 钯 过渡金属 甲醇 乙醇 电氧化 |
| 英文关键词: palladium transition metal methanol ethanol electrooxidation |
| 基金项目:国家自然科学基金(21463017)；江苏省高等学校自然科学研究重大项目(21KJA150005) |
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| 中文摘要: |
| 以一步浸渍法制备了Pd/M-NF(M=Fe、Co、Cu)复合电极；利用XRD、SEM和XPS对电极进行表征；采用循环伏安和计时电流法对电极催化甲醇/乙醇电氧化活性及稳定性进行了测试。结果表明，Pd:M的原子比为=6:1时达到最大催化活性。由于Pd6/Cu1-NF电极表面的Pd粒子最小，展现了最好的催化性能；Fe与Pd的协同作用最大，Pd6/Fe1-NF电极的单位比表面积的电流密度最高。过渡金属的掺杂，减小了Pd纳米粒子的粒径，提升了电极的比表面积，改变了Pd的电子结构，提供了更多的催化反应活性位，进而提升了其催化甲醇/乙醇的电氧化性能。 |
| 英文摘要: |
| Pd/M-NF (M=Fe, Co, Cu) composite electrodes were prepared by adopting a simple one-step impregnation method. The microstructure and surface morphology of the electrodes were analyzed by XRD，SEM and XPS. The activity and stability of the electrodes for methanol/ethanol oxidation were measured by cyclic voltammetry and chronoamperometry. The results showed that a maximum catalytic activity was achieved when the atomic ratio of Pd to M was 6:1. Among the three composites, Pd6/Cu1-NF electrodes displayed the highest performance due to the smallest Pd particle size. The current density at unit specific surface area of Pd6/Fe1-NF electrode was highest because of the better synergy between Fe and Pd. The doping of transition metal reduced Pd-NP particle sizes and increased the electrode specific surface area, changed the electronic structure of Pd and provided more catalytic sites, thus improving the catalytic performance of methanol/ethanol electrooxidation. |
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