Membrane converts CO2 into useful substances

A team of researchers from China and New Zealand has developed a membrane that can operate for more than 5,000 hours to efficiently convert CO2 into formic acid, a useful liquid.

Schematic diagram of formic acid generation using catalyst from lead-acid battery. Photo: NATURE

The study, published in the journal Nature, was designed by researchers from Huazhong University of Science and Technology, the University of Science and Technology of China, and the University of Auckland. The sustainable CO2 conversion process is made possible by a catalyst derived from a disused lead-acid battery. The electrolysis process converts CO2 into useful chemicals, which could contribute to a more sustainable, carbon-neutral future.

“The system is compatible with start-up/stop processes, achieving a one-time CO2 conversion efficiency of nearly 91% at a current density of 600mA cm-2 and a cell voltage of 2.2V, and has been demonstrated to operate continuously for more than 5,200 hours,” said Huazhong University researcher Wen Shengfang. “We expect this outstanding performance, achieved by using a robust and efficient catalyst, a stable three-phase surface, and a durable membrane, will help promote the development of carbon-neutral technologies.”

LAM DIEN

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