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https://hku.zoom.us/j/91638414587?pwd=NHYQ3CEC6DCWU5zbpqvwXqvpt8eNU2.1

Meeting ID: 916 3841 4587

Password: 599331

Abstract:

As global energy demand escalates, the transition from traditional fossil fuels to renewable energy systems faces a critical challenge: the inherent intermittency of wind and solar power. This is where the “green hydrogen”, which is produced through water electrolysis, emerges as a transformative energy carrier.

However, the widespread deployment of water electrolysis has been hindered by its reliance on scarce and expensive noble metal catalysts such as platinum (Pt), iridium (Ir), and ruthenium (Ru) for key electrochemical reactions. For instance, at the cathode side, Pt-based catalysts dominate the hydrogen evolution reaction (HER) in proton exchange membrane (PEM) electrolyzes due to their superior activity.

Over the past decade, extensive research has focused on elucidating the activity origin of transitional metal phosphides (TMPs) and enhancing their intrinsic activity for acidic HER. This seminar aims to review these efforts, synthesize findings, and propose future directions, particularly addressing TMPs' instability without a negative potential, which is crucial for intermittent water electrolysis.

ALL INTERESTED ARE WELCOME