The study, published in the journal ACS Omega by Ahmed Badreldin, assistant professor of chemical engineering at the University of Mississippi, and Carter Racine, a mechanical engineering doctoral student at Texas A&M University, tackles one of the least glamorous but most consequential bottlenecks in the emerging carbon-recycling economy: manufacturing scale. The pair demonstrated a simpler, lower-cost route to producing carbon-recycling catalysts in batches far larger than the laboratory norm, addressing what both researchers describe as one of the biggest barriers to commercial adoption of electrochemical carbon dioxide conversion. Their work does not invent a new reaction so much as remove the practical obstacle that has kept an otherwise promising reaction confined to the bench.

The reaction in question is the electrochemical reduction of carbon dioxide to carbon monoxide. To a general audience, that transformation may sound like swapping one troublesome gas for another, since carbon monoxide is famously poisonous. In industrial chemistry, however, carbon monoxide is a foundational building block. It is used to manufacture synthetic fuels, plastics, pharmaceuticals and a wide range of other products. Mixed with hydrogen, it forms what the hydrocarbon industry calls synthesis gas, or syngas, the feedstock from which an enormous fraction of the modern chemical economy is built. As Racine explains, carbon monoxide is essentially the simplest form of carbon that chemistry can offer, and when paired with green hydrogen produced from renewable electricity, it can serve as the starting point for making chemicals that would otherwise require virgin fossil fuels.

Converting carbon dioxide into carbon monoxide electrochemically is already possible, and has been demonstrated in laboratories around the world for years. The problem has been the catalysts that make the reaction fast and selective. The most advanced designs are nanostructured materials, often based on silver, and they are typically synthesized in quantities measured in milligrams. Racine notes that many research groups work with batches of around 50 to 100 milligrams. At that rate, the arithmetic of industrial deployment becomes absurd. If a lab produces 100 milligrams per batch, he calculates, it would take a year or more to make enough catalyst to cover 10 square meters of electrode area, the kind of surface a commercial electrolyzer would plausibly require. Small batches also mean more repeated synthesis cycles, each one consuming time, energy and money, which drives up the effective cost of every gram produced.

Badreldin and Racine’s answer was to redesign the synthesis itself. Using a nickel-and-iron single-atom catalyst design, in which individual metal atoms dispersed on a support material perform the catalytic work, they showed that a single synthesis run can yield 75-gram batches without sacrificing the performance that makes single-atom electrocatalysts attractive in the first place. That is a jump of roughly three orders of magnitude over the milligram-scale batches typical of the field, achieved in one step rather than through hundreds of repetitions. The significance is easiest to see in Racine’s comparison: at 75 grams per batch, enough catalyst for a large commercial implementation of these technologies could be produced in a few days rather than a year or more.

Single-atom catalysts are worth pausing over, because they represent a distinctive strategy in modern catalysis. In a conventional heterogeneous catalyst, only a fraction of the metal atoms, those sitting on the surface of nanoparticles, actually participate in the reaction, while the rest sit buried inside particles doing nothing. By dispersing metal atoms individually across a support, single-atom designs maximize the use of every atom, which matters enormously when the metals involved, such as nickel, iron or silver, carry real cost. The challenge has always been keeping those isolated atoms stable and uniformly distributed while scaling production beyond the small batches that careful laboratory procedures allow. Demonstrating that the dispersion and performance survive a 75-gram synthesis is precisely the kind of evidence that separates a laboratory curiosity from a manufacturable product.

The economic implications follow directly from the manufacturing gain. According to the researchers’ analysis, the new catalyst could reduce the cost of recycling carbon dioxide to about $145 per ton, some $255 below the current market price, while generating roughly 25 percent fewer emissions than current methods. In a field where techno-economic analyses routinely show promising chemistry failing on cost, a double-digit reduction in both price and carbon intensity is the kind of result that gets the attention of investors and industrial partners. Racine frames the decisive question bluntly: how much electricity the process requires is the biggest consideration, and being able to run the synthesis in larger batches proves the logistics and feasibility of doing it at scale.

There is also a strategic dimension that Badreldin argues may be the strongest near-term driver. Because the technology would let the United States convert domestically captured carbon dioxide into fuels and essential chemicals, it could establish a domestic supply chain for products that are currently vulnerable to global market disruptions and concentrated production elsewhere. Most of the world’s chemical industries, he notes, are centralized in a handful of locations, but this technology opens the possibility of decentralizing that production. The electrochemical setup is modular, which means a company can size its carbon recycling capacity to its own needs rather than building a giant plant. A manufacturer that needs ethylene or ethanol for a production line, Badreldin suggests, could install an electrolyzer stack just large enough to produce the required volume, something the conventional centralized model does not permit.

That modularity could reshape who participates in the carbon-recycling economy. Instead of a few enormous facilities serving national markets, the technology points toward distributed production at breweries, cement plants, chemical works and other sites that emit concentrated streams of carbon dioxide, each converting its own emissions into feedstock on site. The infrastructure for electrochemical energy conversion is, as Badreldin observes, already in place at many startups in the field; what they lack is catalyst supply at a price and scale that make commercial operation viable. A synthesis route that delivers kilogram-scale batches of high-performing single-atom catalysts at lower cost directly unblocks that bottleneck, potentially accelerating the timeline for carbon dioxide electrolysis to move from pilot demonstrations to revenue-generating plants.

One hurdle remains before any of this reaches industrial reality: durability. Racine is candid that the last challenge is making the process stable enough for continuous industrial use. Large oil and gas plants and other industrial facilities run around the clock for roughly 350 days a year, shutting down for only about a week of maintenance. For carbon-conversion technology to slot into that operating rhythm, the catalyst and the electrolyzer system must be able to run for nearly a year without significant degradation. Figuring out that long-term stability, he says, is what his team and everyone else in the field are working on now. If that problem falls, the vision sketched by this study, in which the carbon dioxide billowing from industry becomes the carbon monoxide feeding it, moves a decisive step closer to being ordinary industrial practice rather than an ambitious promise.

Subject of Research: Large-scale synthesis of single-atom catalysts for electrochemical conversion of carbon dioxide to carbon monoxide

Article Title: Researchers turn climate pollution into usable material

Article References: Researchers turn climate pollution into usable material. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: carbon dioxide, carbon monoxide, single-atom catalysts, electrochemistry, nickel-iron catalyst, carbon recycling, synthesis gas, green hydrogen, catalyst scale-up, ACS Omega, climate change, chemical manufacturing