RIKEN Pioneers Cost-Effective Manganese Catalyst for High-Efficiency Green Hydrogen Production

August 17, 2026

理化学研究所の研究成果 (Facebook経由) Japan

Overview

Scientists at Japan’s RIKEN have developed a novel manganese modification technique that significantly enhances the efficiency of proton exchange membrane (PEM) electrolyzers, a key technology for green hydrogen. This breakthrough eliminates the reliance on costly iridium catalysts, promising a substantial reduction in green hydrogen production costs and accelerating the global shift towards sustainable energy.

In Depth

Background

The global push for decarbonization positions green hydrogen as a critical alternative to fossil fuels across numerous industrial sectors. Proton exchange membrane (PEM) electrolyzers are particularly attractive for their high current density, ability to produce high-purity hydrogen, and ease of integration with intermittent renewable energy sources. However, the widespread adoption of PEM technology has been significantly hampered by its reliance on expensive noble metal catalysts, especially iridium, for the anode’s oxygen evolution reaction. This dependence has historically led to high manufacturing costs and supply chain vulnerabilities, creating a pressing need for more affordable and sustainable catalytic solutions.

Key Findings

Researchers at Japan’s RIKEN have successfully developed a novel manganese modification technique that drastically improves the efficiency of proton exchange membrane (PEM) electrolyzers for green hydrogen production. This breakthrough addresses one of the primary hurdles in PEM technology: the reliance on expensive and scarce iridium catalysts for the oxygen evolution reaction (OER) at the anode.

The RIKEN team’s innovation centers on a specifically processed manganese catalyst capable of efficiently driving the OER without iridium. By replacing this noble metal, the new catalyst significantly reduces the manufacturing costs associated with PEM electrolyzers, making green hydrogen production substantially more economically viable. This development not only enhances the overall cost-effectiveness of PEM systems but also establishes a sustainable alternative to critical raw materials, positioning Japan’s technology as a competitive solution in the global market.

Outlook

This innovative manganese modification technology holds immense potential to significantly reduce the cost of green hydrogen production and accelerate the widespread deployment of PEM electrolyzers. Looking forward, the research and development efforts will concentrate on crucial steps for commercialization, including scaling up the technology for industrial application, enhancing long-term durability, and conducting robust demonstration projects. This advancement is poised to strengthen Japan’s leadership in green hydrogen technology, contributing substantially to the global transition towards a sustainable energy future.

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