Boosting electrochemical oxygen reduction to hydrogen peroxide coupled with organic oxidation

Abstract The electrochemical oxygen reduction reaction (ORR) to produce hydrogen peroxide (H 2 O 2 ) is appealing due to its sustainability. However, its efficiency is compromised by the competing 4e − ORR pathway. In this work, we report a hierarchical carbon nanosheet array electrode with a single-atom Ni catalyst synthesized using organic molecule-intercalated layered double hydroxides as precursors. The electrode exhibits excellent 2e − ORR performance under alkaline conditions and achieves H 2 O 2 yield rates of 0.73 mol g cat −1 h −1 in the H-cell and 5.48 mol g cat −1 h −1 in the flow cell, outperforming most reported catalysts. The experimental results show that the Ni atoms selectively adsorb O 2 ,…

• NN
  National Natural Science Foundation of China

  Awards: 22090030, 22090031, 2021QNRC001, buctrc202011, 22288102
• FR
  Fundamental Research Funds for the Central Universities

  Awards: 22090031, 22288102, buctrc202011