Patterned Pt-TiO2 coated flow field plates in PEM water electrolyzers for hydrogen production

IF 2.6 4区化学 Q3 ELECTROCHEMISTRY Journal of Solid State Electrochemistry Pub Date : 2024-07-30 DOI:10.1007/s10008-024-06016-z

Sri Harhsa Swarna Kumar V, Balaji R, Lakshman Neelakantan, Ramya K

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Abstract

This work investigates the use of Ti6Al4V as flow field plates in PEM-based electrolyzer stacks, utilizing its good corrosion resistance and high mechanical strength. The study explores the development of durable conductive coatings on Ti6Al4V surfaces. The coated surfaces are characterized by X-ray diffraction (XRD), showing the characteristic peaks of Pt deposited and the presence of Pt, PtO₂, and TiO₂ after thermal oxidation. Field emission scanning electron microscopy reveals a uniform Pt coating on Ti6Al4V with a thickness of 2–3 µm. Potentiodynamic studies revealed improved corrosion resistance with a corrosion current density of 2.1 µA·cm⁻² in Ti6Al4V-PA-AD-TO compared to Ti6Al4V. Stability under 2 V vs. SHE for 5 h in a PEM water electrolyzer anodic environment is demonstrated, along with an evaluation of performance in a PEM electrolyzer single cell. The durability of the developed coating is assessed over 100 h in a single-cell setup, offering insights into cost-effective PEM-based electrolyzer stacks. The reduction of reliance on precious metals and the enhancement of durability provide a promising method for achieving economic viability in the production of hydrogen through water electrolysis.

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用于 PEM 水电解槽制氢的图案化 Pt-TiO2 涂层流场板

本研究利用 Ti6Al4V 的良好耐腐蚀性和高机械强度，对其在基于 PEM 的电解槽堆中用作流场板进行了研究。研究探讨了在 Ti6Al4V 表面开发耐用导电涂层的问题。X 射线衍射 (XRD) 对涂层表面进行了表征，显示出铂沉积的特征峰，以及热氧化后铂、PtO2 和 TiO2 的存在。场发射扫描电子显微镜显示，Ti6Al4V 上的铂涂层均匀一致，厚度为 2-3 微米。电位动力学研究表明，与 Ti6Al4V 相比，Ti6Al4V-PA-AD-TO 的耐腐蚀性更好，腐蚀电流密度为 2.1 µA-cm-2。在 PEM 水电解槽阳极环境中 2 V vs. SHE 下 5 小时的稳定性得到了证明，同时还对 PEM 电解槽单电池的性能进行了评估。在单电池设置中对所开发涂层的耐久性进行了 100 小时的评估，从而为基于 PEM 的经济高效的电解槽堆提供了深入的见解。减少对贵金属的依赖和提高耐久性为通过水电解生产氢气实现经济可行性提供了一种可行的方法。

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来源期刊

Journal of Solid State Electrochemistry 工程技术-电化学

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.