| 引用本文: | 郭一飞,胡劲,王开军,段云彪,张维钧,曾爱民.钯纳米颗粒的形貌控制合成[J].材料科学与工艺,2022,30(3):58-65.DOI:10.11951/j.issn.1005-0299.20210278. |
| GUO Yifei,HU Jin,WANG Kaijun,DUAN Yunbiao,ZHANG Weijun,ZENG Aimin.Shape-controlled synthesis of palladium nanoparticles[J].Materials Science and Technology,2022,30(3):58-65.DOI:10.11951/j.issn.1005-0299.20210278. |
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| 摘要: |
| 为优化钯纳米颗粒的化学还原法制备工艺,本文以氯钯酸(H2PdCl4)为前驱体,抗坏血酸(C6H8O6)为还原剂,聚丙烯酸钠(PAAS)为表面活性剂制备钯纳米颗粒。采用正交实验探究不同工艺参数对钯纳米颗粒粒径和形貌的影响。通过 X射线粉末衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)、透射电子显微镜(TEM)及电化学工作站对制备产物的结构、物相、形貌、电催化性能进行了表征。结果表明:在相同的工艺体系下,通过温度的改变,40 ℃条件下可以得到粒径大小为64.5 nm,球形度较好,分散性高的钯纳米颗粒；90 ℃条件下可以得到粒径大小为45.9 nm的立方体钯纳米颗粒。所制备的球形和立方体钯纳米颗粒对甲酸的电氧化催化活性分别为商业钯黑的1.57倍和1.49倍,在催化剂制备领域有广泛的应用前景。 |
| 关键词: 钯粉 聚丙烯酸钠 球形 立方体 电催化 |
| DOI：10.11951/j.issn.1005-0299.20210278 |
| 分类号:TG146.3+6 |
| 文献标识码:A |
| 基金项目:中央引导地方科技发展资金资助项目(202107AB110011). |
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| Shape-controlled synthesis of palladium nanoparticles |
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GUO Yifei1, HU Jin1, WANG Kaijun1, DUAN Yunbiao1, ZHANG Weijun1, ZENG Aimin2
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(1.Faculty of Materials Science and Engineering, Kunming University of Science and Technology,Kunming 650093, China; 2.Yunnan Provincial Academy of Science and Technology, Kunming 650093, China)
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| Abstract: |
| In order to optimize the preparation process of palladium nanoparticles by chemical reduction, palladium nanoparticles were prepared using palladium chloride (H2PdCl4) as precursor, ascorbic acid (C6H8O6) as reducing agent, and sodium polyacrylate (PAAS) as surfactant. The effect of different process parameters on the particle size and morphology of palladium nanoparticles was investigated by orthogonal experiments. The structure, phase, morphology, and electrocatalytic properties of the prepared products were characterized by X-ray powder diffractometer (XRD), field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), and electrochemical workstation. Results show that under the same process system, by changing the temperature, spherical palladium nanoparticles with particle size of 64.5 nm could be obtained at 40 °C, which had good sphericity and high dispersion; cubic palladium nanoparticles with particle size of 45.9 nm could be obtained at 90 °C. The prepared spherical and cubic palladium nanoparticles showed 1.57 times and 1.49 times of catalytic activity of commercial palladium black for electrooxidation of formic acid respectively, indicating wide application prospects in the field of catalyst preparation. |
| Key words: palladium powder sodium polyacrylate spherical cubic electrocatalysis |
