AMPERE: automated modular platform for expedited and reproducible electrochemical testing†

IF 6.2 Q1 CHEMISTRY, MULTIDISCIPLINARY
Jehad Abed, Yang Bai, Daniel Persaud, Jiheon Kim, Julia Witt, Jason Hattrick-Simpers and Edward H. Sargent
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Abstract

Rapid and reliable electrochemical screening is critical to accelerate the development of catalysts for sustainable energy generation and storage. This paper introduces an automated and modular platform for expedited and reproducible electrochemical testing (AMPERE), designed to enhance the efficiency and reliability of multivariate optimization. The platform integrates a liquid-handling robot with custom-made modular array reactors, offering sample preparation and electrochemical testing in the same platform. Additionally, we use offline inductively coupled plasma optical emission spectroscopy (ICP-OES) to measure metal concentrations in the electrolyte after the reaction, which serves as a proxy for assessing the electrochemical stability. We use the platform to conduct 168 experiments continuously in less than 40 hours to examine the influence of catalyst ink formulation on the performance of Ir, Ru, IrO2, and RuO2 for the oxygen evolution reaction (OER) in acid. We specifically investigate the role of solvent type and concentration, catalyst concentration, and binder content on the performance. We find that Ru/RuO2 catalysts show improvements in activity that are not directly linked to improvements in the electrochemical surface area or inversely correlated to Ru dissolution. This suggests a complex interplay between the catalytic performance of the drop-casted catalyst film and ink formulation. AMPERE simplifies catalyst preparation and testing at large scale, making it faster, more reliable, and accessible for widespread use.

Abstract Image

AMPERE:用于快速和可重复电化学测试的自动化模块平台†。
快速可靠的电化学筛选对于加快可持续能源生产和储存催化剂的开发至关重要。本文介绍了一种用于快速和可重复电化学测试的自动化模块平台(AMPERE),旨在提高多元优化的效率和可靠性。该平台集成了液体处理机器人和定制的模块化阵列反应器,在同一平台上进行样品制备和电化学测试。此外,我们还使用离线电感耦合等离子体光发射光谱(ICP-OES)来测量反应后电解液中的金属浓度,以此来评估电化学稳定性。我们利用该平台在不到 40 小时的时间内连续进行了 168 次实验,以考察催化剂油墨配方对 Ir、Ru、IrO2 和 RuO2 在酸中进行氧进化反应(OER)的性能的影响。我们特别研究了溶剂类型和浓度、催化剂浓度和粘合剂含量对性能的影响。我们发现,Ru/RuO2 催化剂活性的提高并不直接与电化学表面积的提高相关,也不与 Ru 的溶解成反比。这表明滴铸催化剂薄膜的催化性能与油墨配方之间存在复杂的相互作用。AMPERE 简化了催化剂的制备和大规模测试,使其更快、更可靠、更易于广泛使用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.80
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