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Matsumiya Lab
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The lab develops technologies for recovering rare metals by combining solvent extraction and electrodeposition.
AboutAbout the lab
Combining extraction and electrolysis to recover rare metals.
The Matsumiya Lab studies technologies that separate and recover rare metals, such as platinum group metals and rare earth elements, by combining solvent extraction and electrodeposition.
The lab aims to develop methods that efficiently separate metal ions by using ionic liquids in solvent extraction.
In particular, for platinum group metals, it is developing an "extraction–electrolysis process" in which the ionic liquid left after extraction is used as-is for electrodeposition, which it regards as effective for reducing the volume of secondary waste.
The lab also studies the structures of metal complexes using Raman spectroscopy and density functional theory calculations.
Key terms
- solvent extraction
- A method of separating metal ions by exploiting differences in how they partition between an aqueous phase and an organic phase
- ionic liquid
- A liquid with features such as low vapor pressure and nonflammability. It is expected to be used as a reaction medium and in electrochemical devices
- electrodeposition
- A method in which metal ions in a solution are deposited as metal onto an electrode through electrochemical reduction
- platinum group metals
- Platinum, palladium, rhodium, ruthenium, and others. These are the metals this lab targets for separation and recovery
NewsLab news
The professor co-authored a part of a special issue on rare metal recycling in a journal on separation technology
A paper on recovering Pt and Pd was published in Journal of Environmental Chemical Engineering
The university announced joint research with the Japan Atomic Energy Agency and Osaka University on the mutual separation of Ru, Rh, and Pd
A paper on the separation and direct electrodeposition of Rh(III) was published in Separation and Purification Technology
A paper on recovering Rh by solvent extraction and electrodeposition was published in ECS Advances
ResearchResearch themes
The lab aims to develop advanced, environmentally conscious separation and recovery processes. Centered on combining solvent extraction with electrodeposition, it works on metal recovery using ionic liquids and on structural analysis of metal complexes.
*Illustrative imageRecovering platinum group metals from exhaust gas catalysts
The lab aims to develop methods that efficiently separate metal ions by using ionic liquids in solvent extraction. It regards the extraction–electrolysis process, in which the ionic liquid after extraction and separation is used as-is as the medium for electrodeposition, as effective for reducing the volume of secondary waste.
*Illustrative imageHydrometallurgy and electrodeposition for recovering rare earth elements
The lab has demonstrated a process that efficiently recovers rare earth elements from Nd-Fe-B magnet waste by electrolysis using low-temperature molten salts. In joint research with the Japan Atomic Energy Agency, it is developing a process for the mutual separation of Nd and Dy by multistage extraction.
*Illustrative imageInvestigating metal complex structures with spectroscopy and computation
The properties of an ionic liquid are determined by the motion of the ions in the liquid and the interactions between them. The lab evaluates the solvation structures of metal complexes, which are important in the electrodeposition of rare metals, through combined analysis using Raman spectroscopy and density functional theory calculations.
MembersFaculty
The Matsumiya Lab consists of faculty members, a visiting professor, researchers who are working professionals, and students in the master's program and undergraduate level.As of 2026
- ProfessorMasahiko Matsumiya
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Solvent extraction plant-distillation section” Palagiri / CC BY-SA 3.0 (cropped)
- Recovering platinum group metals from exhaust gas catalysts: “Catalytic converter 20230510” Santeri Viinamäki / CC BY-SA 4.0 (cropped)
- Hydrometallurgy and electrodeposition for recovering rare earth elements: “Rareearthoxides” Peggy Greb, US department of agriculture / Public domain (cropped)
- Investigating metal complex structures with spectroscopy and computation: “Solutions of organic substances for NMR analysis” Ryabitskii / CC BY 4.0 (cropped)
- Related lab (Soft Matter Ionics Materials Lab): “Ionic Liquid ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (Takahashi Lab): “Pedalarm Bruch” Lokilech / CC BY-SA 3.0 (cropped)
- Related lab (Advanced Environmental Measurement Chemistry Lab): “Isotope Ratio Mass Spectrometer ( )” IAEA Imagebank / CC BY 2.0 (cropped)
- Related lab (Miyake (Yuichi) Lab): “Gas chromatograph NeoCHROM in the laboratory w autosampler (Gold )” NeoLyo89 / CC BY 4.0 (cropped)
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