A palm-sized device built from mulberry paper and hydrogel can pull carbon dioxide and nitrogen oxides out of the air while simultaneously generating electricity. That is the central finding from a team at Sungkyunkwan University (SKKU) in South Korea, whose work was published in spring 2026 in Energy & Environmental Science, a peer-reviewed journal from the Royal Society of Chemistry.
The researchers call it the Gas Capture and Electricity Generator, or GCEG. If the lab results hold up beyond controlled conditions, the device could open a new category of climate hardware: one that treats pollution cleanup and power generation as a single process rather than two competing budget lines.
How the GCEG works
The device relies on an asymmetric electrochemical reaction between two layered materials. One side uses carbon-black coated mulberry paper as an electrode. The other uses a Janus polyacrylamide hydrogel, a two-faced gel whose surfaces have different chemical properties. When ambient gas containing CO2 and NOx flows across the device, the two sides react differently to the incoming molecules, creating a charge imbalance that drives direct current through an external circuit.
“Electrical power generation from asymmetric greenhouse gas capture,” the peer-reviewed paper detailing the work, reports stable electrical output under controlled laboratory conditions. The materials involved, mulberry paper and polyacrylamide, are inexpensive and widely available, which the researchers frame as a deliberate design choice aimed at eventual low-cost manufacturing.
Target applications
SKKU’s External Affairs Division outlined three near-term use cases in a public summary of the research: self-powered environmental sensors, battery-free Internet of Things nodes, and monitoring equipment stationed at industrial emissions sites.
The logic is straightforward. Pollution-monitoring sensors are most needed in the dirtiest environments, precisely the places where the GCEG would have the most gas to capture and therefore the most fuel to generate power. A sensor array near a shipping port, highway corridor, or factory stack could theoretically feed air-quality data to a network while trickle-charging its own electronics from the very pollutants it measures.
That dual function matters because distributed sensor networks are expensive to maintain. Replacing batteries in thousands of remote nodes is a recurring cost that limits how densely cities and industrial zones can deploy monitoring equipment. A device that harvests energy from its operating environment could change that math.
What the paper does not yet prove
Several important questions remain unanswered, and readers should weigh the excitement against the gaps.
No independent replication. The results come from a single peer-reviewed paper and its associated university press materials. Peer review means the experimental methods and data passed scrutiny from independent referees, but it does not guarantee the results will hold up at scale or in different labs. No outside group has published a replication study.
Real-world durability is unknown. Laboratory conditions are stable and controlled. Outdoor air is not. Gas concentrations fluctuate by the hour, temperatures swing with the seasons, and humidity can degrade hydrogels. The paper does not include long-term performance data under variable atmospheric conditions, and no external source has confirmed such figures.
Power output benchmarks are missing from public summaries. The peer-reviewed paper likely contains specific voltage, current density, or power density figures, but the available press materials do not relay those numbers in terms that allow direct comparison with a coin-cell battery or a small solar panel. Without accessible benchmarks, it is difficult to judge whether a GCEG could realistically sustain a sensor node for days or only minutes before its adsorption material saturates and needs regeneration. This is a significant reporting gap: the most interesting data in the paper remains behind the technical text rather than in any public-facing summary.
No published cost model. Neither SKKU nor any collaborating institution has released a cost-benefit analysis for manufacturing the device at volume. The raw materials sound cheap, but fabrication processes, quality control, and integration with existing IoT hardware all carry costs that have not been publicly estimated. No industry partner has announced a licensing deal or pilot program.
Why distributed pollution monitoring could change
Most carbon capture systems are energy hogs. They require significant power input to strip CO2 from flue gas or ambient air. Most small-scale power sources, meanwhile, ignore the chemical energy sitting in the polluted air around them. A device that bridges both functions, even modestly, addresses a real gap in the climate technology toolkit.
The GCEG’s value proposition is not that it will replace industrial scrubbers or grid-scale batteries. It is that it could make distributed environmental monitoring cheaper and more self-sustaining in exactly the places where pollution data is hardest to collect. Dense urban corridors, port facilities, and factory perimeters are all environments where NOx and CO2 concentrations are elevated and where sensor coverage is often sparse because of the cost of powering and maintaining remote nodes.
For that promise to become real, the research needs to clear several hurdles: independent replication, published power-density figures that allow direct comparison with existing micro-energy harvesters, a credible cost model, and at least one pilot deployment outside a university lab. The science, as published in a respected journal, is a legitimate starting point. The engineering and economics are still ahead.
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*This article was researched with the help of AI, with human editors creating the final content.
