Hokkaido Univ. Technology : Electrode and control method of Overvoltage : HK24-016
Decrease of overpotential by surface structure
Hydrogen production by water electrolysis has attracted attention in terms of realizing carbon neutrality. However, large overvoltage (= overpotential) is a challenge that causes excessive degradation for the electrode in conventional electrodes. To solve this challenge, optimization of the material composition of the electrode has been advanced, but it is not sufficient. In the invention, as a new electrode design approach, the surface structure of the electrode (nano/micro structure) is calculated and designed in terms of introduction of the interaction with the electronic polarization of chemical reaction intermediates or the vibrational polarization of water molecules in water electrolysis. It can reduce the overpotential and Tafel slope by applying above method successfully. The invention enables water electrolysis with low overpotential, and is expected to reduce power consumption and extend the life of the electrode.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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