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首页> 外文期刊>Electrocatalysis >Design and Development of Instrumentations for the Preparation of Platinum Single Crystals for Electrochemistry and Electrocatalysis Research. Part 1: Semi-Automated Crystal Growth
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Design and Development of Instrumentations for the Preparation of Platinum Single Crystals for Electrochemistry and Electrocatalysis Research. Part 1: Semi-Automated Crystal Growth

机译：用于电化学和电催化研究的铂单晶制备仪器的设计与开发。第1部分：半自动晶体生长

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In this contribution, we report on a novel design of semi-automated system for the growth of spherical platinum (Pt) single crystals. The system is based on the flame fusion methodology, where the crystal melting/solidification process is controlled by the vertical movement of a hydrogen-oxygen flame by using an actuator. The paper systematically examines the impact of several process variables on the crystal growth. First, the hydrogen-oxygen flame is optimized through control of the gas flow rate and the mixing ratio to ensure the formation of high-quality platinum single crystals. The procedure of crystal growth is documented in a step-by-step manner, starting with cleaning of the Pt wire, followed by the initial formation of metallic sphere, and ending with repetitive zone refining combined with chemical etching. The equilibrium shape of the platinum single crystals is discussed, and the individual low and high Miller index facets identified and visualized. The critical step in the single-crystal growth, the repetitive zone refining, is semi-automated in order to ensure the highest quality crystals and reproducibility, and to minimize any human error.
机译：在这项贡献中，我们报告了一种用于球状铂（Pt）单晶生长的半自动化系统的新颖设计。该系统基于火焰熔化方法，其中晶体熔化/凝固过程通过使用致动器通过氢氧火焰的垂直运动来控制。本文系统地考察了几个工艺变量对晶体生长的影响。首先，通过控制气体流速和混合比来优化氢氧火焰，以确保形成高质量的铂单晶。晶体生长的过程以逐步的方式记录下来，从清洗铂丝开始，然后是金属球的初始形成，最后是重复区域精炼与化学蚀刻相结合。讨论了铂单晶的平衡形状，并识别并可视化了低和高的米勒指数刻面。单晶生长的关键步骤（重复区域精炼）是半自动化的，以确保最高质量的晶体和可重复性，并最大程度地减少人为错误。

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