Active Hydrogen Enrichment on Cu 6 Sn 5 ‐type High Entropy Intermetallics for Efficient Nitrate Reduction Reaction

Abstract Electrocatalytic nitrate reduction reaction (NO 3 RR) provides a feasible strategy for green ammonia production and the treatment of nitrate pollution in wastewater. The generation of active hydrogen (H*) plays an important role in improving the selectivity, yield rate, and Faradaic efficiency of ammonia products. Here, structurally ordered nanoporous Cu 6 Sn 5 ‐type high entropy intermetallics (HEI) with extremely superior performance toward NO 3 RR is demonstrated. The optimal nanoporous (Cu 0.25 Ni 0.25 Fe 0.25 Co 0.25 ) 6 Sn 5 HEI delivers a high NH 3 Faradaic efficiency of 97.09 ± 1.15% and excellent stability of 120 h at the industrial level current density of 1 A cm −2 , accordingly directly…

• NS
  National Science and Technology Council

  Award: 113‐2112‐M‐213‐018
• NN
  National Natural Science Foundation of China

  Awards: U23A20554, 52371221
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Award: 2023A1515012408