Plate Nº 94 · recorded October 10, 2026
Chemistry & MaterialsReported finding
MXene Photocatalyst Hits 200× Methane Yield with Polymer Shield
A DGIST-led team wrapped MXene, a water-sensitive 2D nanomaterial, in a polymer layer and added copper nanoparticles. Their Cu/f-MXene/RT photocatalyst produced 18.1 μmol/g of methane, roughly 200 times the bare catalyst's output under light.
By James Calloway3 min read512 words
In brief
- Cu/f-MXene/RT photocatalyst produced 18.1 micromoles of methane per gram, about 200 times the output of the unprotected RT baseline.
- Published in Advanced Energy Materials in 2026; DOI 10.1002/aenm.71560; first author Dongyun Kim.
- Led by Su-Il In of DGIST, with collaborators at Korea National University of Transportation, Hanyang University, and Chulalongkorn University.
- Method combined polymer-coated MXene with reduced TiO₂ and copper nanoparticles to address MXene's tendency to oxidize in water.
- Performance confirmed by both laboratory measurements and density functional theory calculations modeling electron flow through the catalyst.
A photocatalyst developed at DGIST in South Korea turns carbon dioxide into methane at roughly 200 times the rate of an unprotected reference material, producing 18.1 micromoles of methane per gram under simulated sunlight. The results appeared in Advanced Energy Materials in 2026.
Su-Il In, a professor in DGIST's Department of Energy Science and Engineering, led the work. Collaborators included Insik In at Korea National University of Transportation, Taegyeong Lee at Hanyang University, and Soorathep Kheawhom at Chulalongkorn University in Thailand.
What did the team build?
The researchers stacked three components into one light-driven catalyst, called a photocatalyst because photons drive its chemical reactions:
- Modified MXene (f-MXene): MXenes are a family of layered, two-dimensional nanomaterials prized for high electrical conductivity. The team bonded an organic polymer onto each flake, creating a barrier against water and oxygen.
- Reduced titanium dioxide (RT): A light-absorbing semiconductor that supplies electrons when illuminated.
- Copper nanoparticles: Tiny copper clusters that channel those electrons into the conversion of dissolved CO₂ into methane.
Why does MXene need protection?
Bare MXene corrodes quickly in water and air, losing the conductivity that makes it attractive for catalysis. The team applied a surface modification technique that attaches an organic polymer wrapping to the flakes. That wrapping preserves conductivity even when the material sits in an aqueous environment.
Copper nanoparticles placed on the wrapped flakes steer CO₂ reduction toward methane, a fuel with an existing pipeline and storage network. Methane also carries more hydrogen per molecule than many alternatives, which is part of why researchers often target it specifically.
How big is the performance jump?
The Cu/f-MXene/RT catalyst generated 18.1 micromoles of methane per gram of material. The unprotected RT baseline produced roughly 0.09 micromoles per gram under the same conditions, leaving a roughly 200-fold gap.
The team paired those bench measurements with density functional theory calculations, a computational method that models electron behavior inside materials. The simulations helped trace each electron's path from the light-absorbing RT, through the conductive MXene scaffold, and onto the copper reaction sites.
"This study is significant in that we simultaneously improved the stability of the photocatalyst and its carbon dioxide conversion performance by controlling the surface of MXene, which is vulnerable to water and light," Su-Il In said.
"We expect this technology to be used for carbon resource conversion that uses sunlight to convert carbon dioxide into useful fuels such as methane."
What comes next?
The work sits inside a field called carbon capture and utilization, which treats captured CO₂ as a feedstock rather than waste. The DGIST project is a branch of artificial photosynthesis, a subfield modeled on the way plants turn sunlight into carbon-rich molecules.
The findings remain at laboratory scale. Real reactors would need continuous gas flow, outdoor operation under variable sunlight, and durability measured in weeks or months rather than hours. Long-term stability tests have not yet been reported.
The paper's DOI is 10.1002/aenm.71560, and Dongyun Kim is listed as first author.
via Phys.org Chemistry (Source)
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