Light-activated material offers new approach to carbon dioxide conversion

Photo Credit: Courtesy of The University of Manchester

Scientific Frontline: Extended "At a Glance" Summary: Light-Activated Carbon Dioxide Conversion

The Core Concept: A novel light-activated material that utilizes sunlight and water to convert carbon dioxide (\(CO_2\)) into carbon monoxide (\(CO\)), a crucial chemical building block.

Key Distinction/Mechanism: Unlike traditional, energy-intensive carbon conversion methods, this approach relies on photocatalysis, using solely solar energy and water to drive the chemical reduction of greenhouse gases sustainably.

Major Frameworks/Components:

• Photocatalysis: The use of light energy to activate the material and drive the chemical transformation.
• Carbon Reduction: The process of stripping oxygen from carbon dioxide (\(CO_2\)) to produce carbon monoxide (\(CO\)), a highly reactive and useful chemical precursor.
• Sustainable Synthesis: The reliance on abundant, renewable resources—specifically sunlight and water—to replace fossil-fuel-driven manufacturing processes.

Branch of Science: Materials Science, Photochemistry, Environmental Chemistry.

Future Application: The material serves as a foundation for future technologies designed to recycle greenhouse gases directly into sustainable fuels, plastics, pharmaceuticals, and other vital industrial chemicals.

Why It Matters: This advancement presents a significant dual-purpose solution for sustainability: it offers a method to actively reduce atmospheric greenhouse gases while simultaneously providing a green, renewable manufacturing pathway for chemicals that typically require petroleum.

Scientists have developed a new material that can use sunlight and water to convert carbon dioxide (\(CO_2\)) into carbon monoxide (\(CO\)) – a key building block for making fuels, plastics, pharmaceuticals and other everyday chemicals. 

The finding, led by The University of Manchester, could support the development of future technologies that recycle greenhouse gases to make fuels and useful chemicals, more sustainably, using nothing more than light and water. 

\(CO_2\) is the main driver of human-caused climate change, but it is also an abundant carbon resource. Finding efficient ways to convert \(CO_2\) already in the atmosphere into useful products is a major scientific challenge. 

The team’s new catalyst, published today in the Journal of the American Chemical Society, combines ideas from biology and materials science to address the problem. 

Professor Martin Schröder, Professor of Chemistry at The University of Manchester, said: “In nature, specialized enzymes can bind and release small molecules like \(CO_2\) with remarkable control. We have been able to design a solid material that behaves in a similar way. It is activated by visible light to react and convert \(CO_2\), and the original material is then regenerated to react with more \(CO_2\)”. 

The work revolves around metal-organic frameworks (MOFs) - materials made from metal atoms or clusters connected by organic linkers to form porous networks of tiny cavities in which molecules can be adsorbed and activated for conversion to new products, in this case \(CO_2\). 

The researchers used a cerium-based MOF, built using organic linkers that contain amino groups to improve how it absorbs light. When illuminated, the material briefly undergoes an electronic change, creating temporary “open” sites in its pores that can grab hold of \(CO_2\) molecules. They then react and convert into \(CO\) before being released again. 

This reversible binding behavior is similar to how enzymes in living systems handle small molecules such as \(CO_2\). 

In laboratory experiments, the new catalyst produces \(CO\) extremely efficiently, with no detectable by-products, outperforming many existing benchmark materials. 

Unlike other existing systems, the process does not require precious metals or added chemicals that are consumed during the reaction. It also avoids producing large amounts of hydrogen instead of useful carbon-based products. 

The new system uses only light, water and \(CO_2\), and produces one single valuable product. 

Prof Sihai Yang, said: “Our research is still at a fundamental stage, but the findings provide a clear blueprint for designing next-generation catalysts that turn waste \(CO_2\) into useful chemicals. 

 “By learning from how nature controls chemical reactions, we can begin to design materials that open up exciting possibilities for clean and efficient energy technologies.” 

The researchers believe the principles demonstrated here could be applied to a wide range of reactions, helping to accelerate the development of sustainable solar-to-fuel technologies. 

Published in journal: Journal of the American Chemical Society

Title: Light-Induced Binding and Reduction of CO2 over Transient Open Ce(III) Sites in a Metal–Organic Framework

Authors: Shan Dai, Xiangdi Zeng, Benjamin J. Moore, Yuxiang Zhu, Yuhang Yang, Zi Wang, Luyan Li, Te Wang, Ivan da Silva, Luke Keenan, Floriana Tuna, Daniel Lee, Sarah Day, Lucy Saunders, Martin Schröder, and Sihai Yang

Source/Credit: University of Manchester

Reference Number: ms031726_01

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