The stability of electrocatalysts is essential for ensuring the efficiency, durability, cost-effectiveness, safety, scalability, and environmental sustainability of hydrogen production systems. Without stable electrocatalysts, the practical and economic feasibility of using water electrolysis for hydrogen production would be significantly compromised. Now, Princeton Applied Research have released a new Application Note addressing these issues.

Image:  Lab-scale flow electrolyzers provide a robust platform for characterizing electrocatalytic stability, an essential step for the effective scale-up of water electrolysis technologies.

Introduction

The stability of electrocatalysts employed in water electrolysis is not merely a consideration, but a critical determinant of the efficiency and durability of hydrogen production systems. Drawing insights from the article "A Guide to Electrocatalyst Stability Using Lab-Scale Alkaline Water Electrolyzers" (DOI: 10.1021/acsenergylett.3c02758) , this application note offers guidelines for performing electrochemical stability tests. It underscores the importance of electrocatalyst stability in advancing your research and applications in hydrogen production.

Understanding and optimizing catalyst stability is essential for enhancing the reliability and longevity of electrolysis systems, ultimately contributing to the widespread adoption of clean energy technologies. Flow cells provide a practical and effective method for identifying and evaluating promising electrocatalysts. Unlike traditional three-electrode cells, flow cells can accommodate larger electrodes and support higher current densities, offering a more accurate testing environment for catalyst performance. A key challenge in designing flow electrolyzers is minimizing ohmic cell resistance. This is achieved by compressing two porous electrodes against an ionic conductive separator, creating a zerogap configuration. During assembly, a typical flow electrolyzer uses stainless steel bolts tightened uniformly at low torque, with close monitoring of electrolyte temperature to ensure consistent conditions.

Download and read the full Application Note here

Metrology