Electrodeposition of palladium nanoparticles onto indium tin oxide glass electrode. A kinetical and morphological study and effect of the potential in the particle size

IF 2.6 4区 化学 Q3 ELECTROCHEMISTRY
Luis Humberto Mendoza-Huizar
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引用次数: 0

Abstract

In the present work, it was conducted an electrochemical, kinetic, and morphological investigation of the electrodeposition of palladium (Pd) nanoparticles onto an Indium Tin Oxide (ITO) glass electrode. The electrodeposition was performed using a plating bath containing 0.001 M PdCl₂ and 1 M NH₄Cl at a pH of 6. The results indicate that Pd can be electrodeposited without the influence of hydrogen adsorption/desorption processes by selecting an applied potential range between 1.00 and − 0.6 V. The electrodeposition of Pd is diffusion-controlled, as evidenced by the linear relationship between the peak current (jp) and the square root of the scan rate (ν¹/²). The kinetic study reveals a progressive nucleation process, leading to the formation of Pd particles of varying sizes. Morphological analysis using optical microscopy and Atomic Force Microscopy (AFM) demonstrates that particle size decreases as the applied potential to the ITO substrate becomes more negative. AFM images indicate that the average heights of the Pd clusters are 149.5 nm, 91.6 nm, and 79.2 nm at -0.150 V, -0.200 V, and − 0.250 V, respectively; while the diameters of the particles ranged from 120 to 735 nm at -0.150 V, from 80 to 550 nm at -0.200 V, and from 60 to 360 nm at -0.250 V. At -0.300 V, agglomeration of Pd nanoparticles was observed due to the high nucleation rate.

钯纳米粒子在氧化铟锡玻璃电极上的电沉积。动力学和形态学的研究和影响的电势在粒度
本文对钯纳米粒子在氧化铟锡玻璃电极上的电沉积进行了电化学、动力学和形态学研究。采用含0.001 M PdCl₂和1 M nh_4 Cl, pH = 6的镀液进行电沉积。结果表明,选择1.00 ~−0.6 V的电势范围,可以在不受氢吸附/解吸过程影响的情况下电沉积Pd。Pd的电沉积是扩散控制的,其峰值电流(jp)与扫描速率(ν¹/²)的平方根呈线性关系。动力学研究揭示了一个渐进的成核过程,导致形成不同尺寸的Pd颗粒。使用光学显微镜和原子力显微镜(AFM)进行的形态分析表明,随着ITO衬底上的电位变得更负,颗粒尺寸减小。AFM图像显示,在-0.150 V、-0.200 V和- 0.250 V下,钯簇的平均高度分别为149.5 nm、91.6 nm和79.2 nm;在-0.150 V下,颗粒直径为120 ~ 735 nm,在-0.200 V下为80 ~ 550 nm,在-0.250 V下为60 ~ 360 nm。在-0.300 V下,由于高成核速率,钯纳米粒子出现团聚现象。
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来源期刊
CiteScore
4.80
自引率
4.00%
发文量
227
审稿时长
4.1 months
期刊介绍: The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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