Heterostructures Composed of N‐Doped Carbon Nanotubes Encapsulating Cobalt and β‐Mo 2 C Nanoparticles as Bifunctional Electrodes for Water Splitting

Abstract Herein, we demonstrate the use of heterostructures comprised of Co/β‐Mo 2 C@N‐CNT hybrids for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in an alkaline electrolyte. The Co can not only create a well‐defined heterointerface with β‐Mo 2 C but also overcomes the poor OER activity of β‐Mo 2 C, thus leading to enhanced electrocatalytic activity for HER and OER. DFT calculations further proved that cooperation between the N‐CNTs, Co, and β‐Mo 2 C results in lower energy barriers of intermediates and thus greatly enhances the HER and OER performance. This study not only provides a simple strategy for the construction of heterostructures with nonprecious metals, but also…

• NS
  Natural Science Foundation of Shanghai

  Awards: 2017A030311016, 2018A030310339
• NN
  National Natural Science Foundation of China

  Award: 21875048, 21576056, and 21576057