The interplay between hydrogen evolution reaction and nitrate reduction on boron-doped diamond in aqueous solution: the effect of alkali cations

Arturo Manzo-Robledo (1, 2) , C. Levy-Clement (3) , Nicolas Alonso-Vante (2)

1 ESIQIE-IPN
2 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]
3 ICMPE - Institut de Chimie et des Matériaux Paris-Est

The nitrate ion reduction was studied on boron-doped diamond (BDD) electrodes by real-time on-line differential electrochemical mass spectrometry (DEMS) coupled with chronoamperomety in K+, Na+ cation-containing electrolyte solutions. It was found, via steady state voltammetry, that the hydrogen evolution reaction (HER) was affected by the presence of K+ or Na+. A moderate HER occurs in K+-containing electrolyte solution favoring the reaction between NO3- and H-2 species, whereas in Na+-containing electrolyte solutions, the HER kinetics was more important leading to a suppression of molecular nitrogen generation. The use of isotope-labeled nitrogen and DEMS confirmed the influence of alkali cations toward the nitrate ion reduction

Mots clés: cation effect; HER; nitrate reduction; DEMS; Boron-doped diamond

Domaines: Catalyse; Chimie

Arturo Manzo-Robledo, C. Levy-Clement, Nicolas Alonso-Vante. The interplay between hydrogen evolution reaction and nitrate reduction on boron-doped diamond in aqueous solution: the effect of alkali cations. Electrochimica Acta, 2014, 117, pp.420-425. ⟨10.1016/j.electacta.2013.11.151⟩. ⟨hal-01191149⟩