Electrochemical Behavior of Nitrogen Gas Species Adsorbed onto Boron-Doped Diamond (BDD) Electrodes

Abstract

The adsorption of nitrogen species, in neutral electrolyte solutions, onto boron-doped diamond (BDD) electrode surfaces from dissolved NO2, NO, and N2O gases was induced at 0 V/SCE. Modified BDD electrode surfaces showed a different electrochemical response toward the hydrogen evolution reaction than did a nonmodified electrode surface in electrolyte base solution. The formation of molecular hydrogen and nitrogen gaseous species was confirmed by the online differential electrochemical mass spectrometry (DEMS) technique. Among the three nitrogen oxides gases, NO2 substantially modifies the electrolyte via hydrolysis leading to the formation of NO3- and its adsorption on the BDD electrode surface. The BDD/(NO3-) interface was the only N2O and N2 species generating system.

Relationship between the Bandgap and Electrochemical Behavior on TiO₂ Nanoparticles Prepared Sonochemically

“…In Table 1, the highest value of current-charge function is presented in the sample with a heat treatment at 450°C as mentioned above. Hence, an optimal size (17nm) exists, with particular structural and morphological properties, and they improve electro-reduction processes such as water reduction phenomena [24,25]. The present study also indicates that microstructural changes have influence in the catalytic efficiency of the TiO 2 particles and the proton adsorption-desorption at the electrode interface.…”

Selectivity modulation during electrochemical reduction of nitrate by electrolyte engineering

“…In fact, as reported by some authors, the size of alkali cations influences the surface charge density at the electrode, availability of water molecules, and stability of reaction intermediates [69][70][71][72][73]. A key element of the complex process of the NO 3 -/NO 2ion reduction path on the surface of the Sn cathode at alkaline pH can be the adsorption of the nitrogen species [74]. Clearly, adsorption takes place in the presence of the alkali cations, since these cations are located at the electrodeelectrolyte interface interacting with the negatively polarized cathode surface.…”

Electro-reduction of Nitrate and Nitrite Ions on Carbon-Supported Pt Nanoparticles

“…Furthermore, the industrial production of important compounds such as NH 2 OH, N 2 O has received attention recently (5). For these reasons the electro-reduction of nitrate ions (NO 3 -) has been investigated in recent years (6)(7)(8)(9)(10)(11)(12)(13)(14)(15). Some electrochemical studies have been done on platinum electrodes (5)(6)(7)(8)(9)(10)(16)(17)(18).…”

“…For these reasons the electro-reduction of nitrate ions (NO 3 -) has been investigated in recent years (6)(7)(8)(9)(10)(11)(12)(13)(14)(15). Some electrochemical studies have been done on platinum electrodes (5)(6)(7)(8)(9)(10)(16)(17)(18). The reduction of nitrate ions onto oriented platinum crystals follows different mechanisms, due to the fact that this multi-electron charge transfer reaction is affected by the pH of the medium (7,10,11,(19)(20)(21).…”