A Survey of Catalytic Materials for Ammonia Electrooxidation to Nitrite and Nitrate.

ABSTRACT: Studies of the ammonia oxidation reaction (AOR) for the synthesis of nitrite and nitrate (NO_2/3 ^- ) have been limited to a small number of catalytic materials, majorly Pt based. As the demand for nitrate-based products such as fertilisers continues to grow, exploration of alternative catalysts is needed. Herein, 19 metals immobilised as particles on carbon fibre electrodes were tested for their catalytic activity for the ammonia electrooxidation to NO_2/3 ^- under alkaline conditions (0.1 m KOH). Nickel-based electrodes showed the highest overall NO_2/3 ^- yield with a rate of 5.0±1.0 nmol s^-1  cm^-2 , to which nitrate contributed 62±8 %. Cu was the only catalyst that enabled formation of nitrate, at a rate

SUBMITTER: Johnston S 

PROVIDER: S-EPMC9827930 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature