Two-dimensional stable and ultrathin cluster-based metal-organic layers for efficient electrocatalytic water oxidation

For electrochemical energy conversion, highly efficient and stable electrocatalysts are required, which are principally designed and synthesized by virtue of structural regulation. Two-dimensional cluster-based metal-organic layers (CMOLs) would have good performance in oxygen evolution reaction (OER) because of their stable and layered structure. Here, we first report the synthesis of CoNi bimetal two-dimensional CMOLs directly grown on Ni foam, which show excellent catalytic activity for the OER under alkaline conditions. Co0.6Ni0.4-CMOLs exhibited the best OER performance, compared with Co-CMOLs and Ni-CMOLs. The findings are expected to help understand the fundamental concept of enhanced electrochemical activity based on pristine metal-organic frameworks with high stability.

Automated summary

The study introduces the synthesis of CoNi bimetal two-dimensional CMOLs with excellent catalytic activity for the oxygen evolution reaction (OER) under alkaline conditions. Co0.6Ni0.4-CMOLs showed the best OER performance among Co-CMOLs and Ni-CMOLs. These findings contribute to understanding the concept of enhanced electrochemical activity based on stable metal-organic frameworks.