Electrocatalytic reduction of nitrate ions in neutral medium at coinage metal-modified platinum electrodes.

Nitrate is a water-soluble toxic pollutant that needs to be excluded from the environment. For this purpose, several electrochemical studies have been conducted but most of them focused on the nitrate reduction reaction (NRR) in alkaline and acidic media while insignificant research is available in neutral media with Pt electrode. In this work, we explored the effect of three coinage metals (Cu, Ag, and Au) on Pt electrode for the electrochemical reduction of nitrate in neutral solution.

Composite Noble-Metal Films/H -Conducting Solid-Polymer Electrolyte Assemblies: The Nitrate-Reduction Activity in an Asymmetric Sandwich-Type Reactor.

Asymmetric (Pt|Nafion|Pt-Pd-Cu) assemblies were fabricated to study the nitrate-reduction reaction (NRR) at the cathode surface. The influence of the material composition, supplied current, and applied potential on the reactivity, kinetics, and product selectivity were thoroughly investigated. The cathode assembly consisting of 54 atom % Pt showed enhanced reactivity both in binary (Pt-Pd; k ≈10.