Soil Bacterium Converts CO₂ to Fuel Using Electricity | New Carbon Recycling Tech

A newly identified soil bacterium, Fundidesulfovibrio terrae, is demonstrating a remarkable ability to convert carbon dioxide into acetate using electricity, potentially unlocking cleaner and more sustainable methods for chemical production and carbon recycling. The discovery, detailed in a recent study published in Energy & Environment Nexus, reveals a previously unknown microbial strategy with implications for carbon neutral technologies.

Researchers isolated F. Terrae from paddy soil and found it capable of bidirectional extracellular electron transfer – a process where the bacterium both exports and absorbs electrical energy. This ability, while present in some microbes, is relatively uncommon and allows F. Terrae to interact electrically with its environment, exchanging electrons with materials like minerals or electrodes. This is particularly useful in oxygen-limited environments and influences broader biogeochemical cycles.

Laboratory experiments showed the bacterium can directly transfer electrons to iron minerals, reducing iron compounds with over sixty percent efficiency. Crucially, the research team confirmed that F. Terrae can both donate and accept electrons from electrodes, forming stable biofilms that facilitate continuous electrical interaction. “This microorganism demonstrates an exceptional ability to harvest energy directly from electrical sources and channel it into carbon metabolism,” stated a researcher involved in the study.

The most significant finding centers on the bacterium’s capacity to use electricity to drive carbon fixation. When provided with electrons from an electrode and carbon dioxide, F. Terrae converted the greenhouse gas into acetate via the Wood Ljungdahl pathway – a highly efficient microbial carbon fixation mechanism. The system achieved acetate concentrations exceeding 11 millimolar, indicating effective conversion of electrical energy into a valuable organic product. This process aligns with growing interest in microbial electrosynthesis systems, which aim to use microbes to transform carbon dioxide and electricity into fuels, and chemicals.

The bacterium’s electrical communication is facilitated by specialized proteins called c-type cytochromes, which act as molecular conduits for electron transport across cell membranes. F. Terrae utilizes conductive pili – microscopic, wire-like structures – to enable efficient electron flow between cells and external surfaces. Genomic and biochemical analyses confirmed the role of these structures in the process.

This discovery expands understanding of sulfate-reducing bacteria, traditionally known for their roles in sulfur cycling, corrosion, and environmental remediation. Until now, bidirectional electron transfer was observed in only a limited number of microorganisms. The identification of this mechanism in F. Terrae suggests these bacteria may have broader ecological and industrial roles than previously understood.

The potential applications extend to sustainable energy technologies. As global efforts to address climate change intensify, harnessing microbes capable of transforming waste carbon into useful products represents an innovative pathway toward a low-carbon future. The research highlights the growing potential of electroactive microorganisms as a bridge between renewable energy sources and carbon recycling initiatives.

While the findings are promising, researchers emphasize the need for further study to optimize microbial electrosynthesis performance and to fully understand how these organisms function in both natural and engineered environments. However, the discovery of F. Terrae and its unique capabilities provides a valuable new biological resource for developing environmentally friendly manufacturing technologies. The study, published January 30, 2026, underscores the potential of biological systems to contribute to a more sustainable industrial landscape.

The research comes amid increasing investment in carbon capture, utilization, and storage (CCUS) technologies. According to a recent report, numerous startups are focused on developing innovative solutions in this space. StartUs Insights recently identified 30 top CCUS startups to watch in 2026, signaling growing market interest. Breakthroughs in converting carbon dioxide into other fuels, such as methane, are also gaining traction, as reported by SciTechDaily, offering alternative pathways for carbon utilization.

The discovery of F. Terrae also builds on existing research into the potential of microbes in decomposition and broader environmental processes. Studies, such as those highlighted by ScienceDirect, continue to unravel the complex roles microbes play in the decomposition of organic matter and their impact on climate change and ecosystem productivity. The identification of a bacterium capable of actively utilizing electricity to convert CO2 adds a new dimension to this understanding.

Just this week, Mirage News reported on another newly identified bacterium capable of turning CO2 into chemicals using electricity, further demonstrating the growing field of research.