 The researchers developed a new material called co-layered double hydroxide, co-LDH, at ZIF67, which has been shown to be highly efficient in splitting water molecules into hydrogen and oxygen. The material is composed of a layered double hydroxide, LDH, on top of a zinc iron framework, ZIF67. The LDH layer helps to increase the catalytic activity of the oxygen-evolution reaction, OR, while the ZIF67 layer helps stabilize the material and prevent degradation. The researchers found that the interfacial interaction between the two layers increases the strength of the co-O bond in the co-LDH layer, making it easier to break the HO bond in the OER reaction. As a result, the co-LDH at ZIF67 material has a much lower overpotential compared to other materials, allowing for faster and more efficient splitting of water molecules. This article was authored by Zhenxing Li, Xiyin Zhang, Ikuan Kong, and others.