⚗️ Mining the atmosphere? When CO2 becomes a high-value raw material

Carbon dioxide, often singled out as a pollutant, could become a highly valuable resource. An innovative technique exploiting isolated metal atoms opens the door to this conversion.

Methanol occupies a central place in the chemical industry, serving as a base for many products like plastics and fuels. In this context, researchers at ETH Zurich have developed a catalyst that converts CO2 into methanol with improved efficiency, by exploiting individually dispersed indium atoms.


Unlike conventional catalysts where metals form clusters, this design relies on single atoms anchored on a hafnium oxide support. Each atom acts as an active site, maximizing the use of the metal and lowering the energy required for the reaction. This unique architecture facilitates the conversion of CO2 and hydrogen into methanol, offering a faster and less resource-intensive process. The advantages are multiple, including a reduction in waste and better control of chemical steps.

Furthermore, the interest in this method lies in its sustainable potential. If the hydrogen and energy used come from renewable sources, methanol production can become climate-neutral. Thus, the CO2 captured from the atmosphere serves as a raw material rather than simply being emitted, contributing to a transition towards a more environmentally friendly chemical industry.

The stability of the catalyst is ensured by a support designed to withstand the demanding conditions of industrial processes, such as temperatures reaching 572°F (300°C) and high pressures. The indium atoms are durably fixed thanks to synthesis techniques, including high-temperature treatments.

This robustness is important for large-scale application, guaranteeing that the catalyst remains active and reliable in the long term, even in harsh environments.