Cobalt phosphide nanorings towards efficient electrocatalytic nitrate reduction to ammonia

High-quality CoP nanorings (CoP NRs) are easily achieved using a phosphorating treatment of CoOOH nanorings, and reveal high activity towards the hydrogen evolution reaction and the nitrate electrocatalytic reduction reaction due to substantial coordinately unsaturated active sites, a high surface area, and available mass transfer pathways. Consequently, the CoP NRs can achieve a faradaic efficiency of 97.1% towards NO3--to-NH3 conversion and provide an NH3 yield of 30.1 mg h(-1) mg(cat)(-1) at a -0.5 V potential.

Automated summary

High-quality CoP nanorings (CoP NRs) are easily achieved by phosphorating treatment of CoOOH nanorings, showing high activity towards hydrogen evolution reaction and nitrate electrocatalytic reduction reaction due to coordinately unsaturated active sites, high surface area, and mass transfer pathways. The CoP NRs can achieve 97.1% faradaic efficiency towards NO3--to-NH3 conversion and yield 30.1 mg h(-1) mg(cat)(-1) NH3 at -0.5 V potential.