Efficient Ammonia Electrosynthesis and Energy Conversion through a Zn‐Nitrate Battery by Iron Doping Engineered Nickel Phosphide Catalyst

Abstract The electrocatalytic nitrate reduction reaction (NO 3 ‐RR) to ammonia (NH 3 ) offers a promising alternative approach for NH 3 production and nitrate‐based voltaic cells which can deliver both electricity and NH 3 as products, are also highly attractive. However, nitrate‐to‐NH 3 conversion involves a proton‐assisted multiple‐electron transfer process with considerable kinetic barrier, underlying the need for efficient catalysts for the NO 3 – RR. A Zn‐nitrate battery is reported to enable a “killing three birds with one stone” strategy for energy supply, ammonia production and removal of pollutants with the iron doped nickel phosphide (Fe/Ni 2 P) as a NO 3 – RR catalyst electrode. Iron doping induces…