New achievements of layered double hydroxides toward efficient, stable, fast oxygen evolution reaction. Scientists in China have made advancements in the use of layered double hydroxides to improve oxygen evolution reaction (OER) energy utilization, toward the goal of efficient hydrogen generatio
The idealized structure of LDHs. Credit: Mingfei Shao, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing
Production of highly pure hydrogen can be achieved by electrochemical water splitting using the electricity transformed from renewable energy such as wind and solar energy. But as one of the half-reactions, OER is a four-electron process, which causes a low efficiency of energy utilization, according to Shao.
Until now, the development and exploration of OER catalysts is mostly in the experimental stage, which cannot meet the standards for large-scale practical use. For example, there are still problems with enlarging the size of catalysts and maintaining stability during OER with a severe condition, such as high alkalinity and high temperature.
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