Mechanistic aspects of electrolytic water splitting in acid and alkaline
Peter Strasser a
a Technical University Berlin, Straße des 17. Juni 124 10623 Berlin, Germany
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
In situ/operando characterization of electrochemical energy materials with synchrotron X-ray techniques - #Operax
Sevilla, Spain, 2025 March 3rd - 7th
Organizers: Carlos Escudero and Juan Jesús Velasco Vélez
Invited Speaker, Peter Strasser, presentation 333
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.333
Publication date: 16th December 2024

The electrolytic splitting of water into its elements is Reaction No.1 in modern electrochemistry. Discovered by van Troostwijk, Nicolson, Carlisle, and Ritter, water splitting and its half-cell constituents - hydrogen evolution (HER) and oxygen evolution (OER) – later became the most widely explored electrochemical model reactions in ground-breaking works by Bockris, Parsons, Conway, and Gerischer. Over the past 2 decades, advanced characterization methods coupled to high performance computations have offered new molecular insights into the reactive interface of catalyst and electrolyte. Today, water splitting using renewable power is an emerging industrial process technology to generate “green” hydrogen, a versatile energy vector for the decarbonization of power generation, heat, mobility, and industry.

In this presentation, I will share some of our recent work on the design and ex/in-situ characterization of electrocatalytic materials, interfaces and mechanisms for the electrochemical oxygen evolution reaction (OER). Catalytic materials such as Iridium oxide and Nickel oxides along with similarities and differences in their mechanisms in acid and alkaline environments will be discussed.

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