Photocatalytic H2O2 Production over Ultrathin Layered Double Hydroxide with 3.92% Solar-to-H2O2 Efficiency

Abstract Artificial photosynthesis of hydrogen peroxide (H 2 O 2 ) from earth-abundant water and oxygen is a sustainable approach, however current photocatalysts suffer from low production rate and solar-to-chemical conversion efficiency (< 1.5%). Herein, we report that nickel–chromium layered double hydroxide with intercalated nitrate (NiCrOOH-NO 3 ) and a thickness of ~ 4.4 nm is an efficient photocatalyst, enabling a H 2 O 2 production yield of 28.7 mmol g −1 h −1 under visible light irradiation with 3.92% solar-to-chemical conversion efficiency. Experimental and computational studies have revealed an inherent facet-dependent reduction–oxidation reaction behavior and spatial separation of photogenerated…

• NN
  National Natural Science Foundation of China

  Awards: 22075085, NSFC 21905092, 22475072, 21905092
• EC
  East China Normal University
• FR
  Fundamental Research Funds for the Central Universities