Enhancing Compatibility of Two‐Step Tandem Catalytic Nitrate Reduction to Ammonia Over P‐Cu/Co(OH) 2

Abstract Electrochemical nitrate reduction reaction (NO 3 RR) is a promising approach to realize ammonia generation and wastewater treatment. However, the transformation from NO 3 − to NH 3 involves multiple proton‐coupled electron transfer processes and by‐products (NO 2 − , H 2 , etc.), making high ammonia selectivity a challenge. Herein, a two‐phase nanoflower P‐Cu/Co(OH) 2 electrocatalyst consisting of P‐Cu clusters and P‐Co(OH) 2 nanosheets is designed to match the two‐step tandem process (NO 3 − to NO 2 − and NO 2 − to NH 3 ) more compatible, avoiding excessive NO 2 − accumulation and optimizing the whole tandem reaction. Focusing on the initial 2e − process, the inhibited * NO 2 desorption on Cu sites…

• NS
  Natural Science Foundation of Guangdong Province

  Award: 2022A1515011999
• SF
  Shenzhen Fundamental Research Program

  Awards: GXWD20201231165806004, 20200829101039001