多重栾晶钯颗粒的可见光简易合成及对乙醇的电催化氧化（英文）

Palladium Multiply Twinned Particles: a Facile Visible-Light-Assisted Synthesis and Electrooxidation of Ethanol

以氯化钯(Pd Cl_2)为金属前驱体,乙醇为还原剂,聚乙烯吡咯烷酮(PVP)为稳定剂和导向剂,利用普通市售节能灯产生的光热作用,辅助制备多重栾晶钯纳米颗粒。用HRTEM、FFT、PXRD、XPS、UV-Vis和FT-IR等技术对产品的形貌、晶体结构、光学性质和稳定性进行了表征,并通过循环伏安法研究了多重栾晶Pd修饰玻碳电极对乙醇的电催化氧化活性。结果表明,多重栾晶钯结构的形成依赖于光和热的协同作用。该材料的表面等离子共振吸收峰在可见光区域,对乙醇有较好的电催化活性和抗中毒能力。

Using palladium chloride（Pd Cl2） as the palladium precursor, ethanol as reducing agent and poly（vinyl pyrrolidone）（PVP） as a stabilizer and guiding agent, palladium（Pd） multiply twinned particles（MTPs） were synthesized via photothermally assisted solution approach with visible light from a commercial energy-saving lamp as light source. The morphologies, crystal structure, optical properties and the stability of Pd MTPs were characterized by high resolution transmission electron microscopy（HRTEM）, fast Fourier transformation（FFT）,powder X-ray diffraction（PXRD）, X-ray photoelectron spectroscopy（XPS）, UV-Visible spectroscopy and Fourier transform infrared（FT-IR） spectroscopy, respectively. The electrocatalytic properties of the Pd MTPs modified glassy carbon electrode for ethanol oxidation were investigated by cyclic voltammetry. The results showed that the formation of Pd MTPs depends on the coordination interaction of light and thermal effects. Surface plasmon resonance（SPR） peak of Pd MTPs is located at the visible region. This material exhibits remarkable electrocatalytic activity and anti-poisoning faculty for the ethanol oxidation.