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首页> 外文期刊>Electrocatalysis >The Effect of Reducing Agents on the Electronic, Magnetic and Electrocatalytic Properties of Thiol-Capped Pt/Co and Pt/Ni Nanoparticles
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The Effect of Reducing Agents on the Electronic, Magnetic and Electrocatalytic Properties of Thiol-Capped Pt/Co and Pt/Ni Nanoparticles

机译：还原剂对巯基封端的Pt / Co和Pt / Ni纳米粒子的电，磁和电催化性能的影响

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摘要

The electronic, magnetic and electrocatalytic properties of bimetallic thiol-capped Pt/Co and Pt/Ni nanoparticles were synthesised using two reducing agents, NaBH4 and N2H4. X-ray diffraction analysis of the nanoparticles showed Pt lattice contraction upon the addition of Co or Ni to Pt indicating the formation of an alloy structure, more apparent when N2H4 was used. XPS data analysis revealed Pt metal and Pt(II) (assigned to PtO) and a higher concentration of surface metallic Ni and Co for the NaBH4-reduced samples. Both the NaBH4- and N2H4-reduced catalysts were active for the methanol oxidation reaction (MOR), with the Pt-Co-N2H4 catalyst revealing the highest activity. The N2H4 significantly affected the magnetic properties of Pt/Co and Pt/Ni particles by controlling the morphology and crystalline structure of the nanoparticles. In general, the type of reducing agent affected the final properties of the nanoparticles.
机译：使用两种还原剂NaBH4和N2H4合成了双金属硫醇封端的Pt / Co和Pt / Ni纳米粒子的电，磁和电催化性能。纳米粒子的X射线衍射分析表明，向Pt中添加Co或Ni后，Pt晶格收缩，表明形成了合金结构，当使用N2H4时更明显。 XPS数据分析显示，对于NaBH4还原的样品，Pt金属和Pt（II）（分配给PtO）以及较高浓度的表面金属Ni和Co。 NaBH4-和N2H4还原的催化剂对甲醇氧化反应（MOR）均具有活性，而Pt-Co-N2H4催化剂显示出最高的活性。 N2H4通过控制纳米粒子的形态和晶体结构显着影响Pt / Co和Pt / Ni粒子的磁性。通常，还原剂的类型影响纳米颗粒的最终性质。

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