Effects of ions on electrocatalytic hydrogenation and oxidation of organics in aqueous phase

Pioneering Piezoelectric-Driven Atomic Hydrogen for Efficient Dehalogenation of Halogenated Organic Pollutants

“…The inorganic ions have somewhat negative effects on the degradation and defluorination of LVF; however, the addition of HA inversely increased the defluorination efficiency. The inorganic ions would influence the interfacial water layer near the catalyst and occupy the active sites on the catalyst surfaces, and they could also lower the transition state energy of hydrogen ion . On the other hand, HA has some acidic groups that can release hydrogen ions, which facilitate the formation of H* and thus improves the defluorination efficiency.…”

“…The inorganic ions would influence the interfacial water layer near the catalyst and occupy the active sites on the catalyst surfaces, and they could also lower the transition state energy of hydrogen ion. 45 On the other hand, HA has some acidic groups that can release hydrogen ions, which facilitate the formation of H* and thus improves the defluorination efficiency. H*-Mediated Defluorination Mechanism.…”

Effect of Electrolyte Composition and Mass Transport on Electrochemical Hydrogenations of a Terminal Alkynol

“…This results in the electrolyte being mainly employed as a medium for reaction environment and substrate transport. Therefore, it is of major importance to optimize the electrolyte composition regarding the choice of conducting salt as well as concentration of both conducting salt and organic substrate [42][43][44][45][46]. Substrate and solvent concentration influence the hydrogenation kinetics due to altered surface coverage of substrate and hydrogen as it was shown for benzaldehyde and adiponitrile hydrogenation [42,45,47].…”

“…Therefore, it is of major importance to optimize the electrolyte composition regarding the choice of conducting salt as well as concentration of both conducting salt and organic substrate [42][43][44][45][46]. Substrate and solvent concentration influence the hydrogenation kinetics due to altered surface coverage of substrate and hydrogen as it was shown for benzaldehyde and adiponitrile hydrogenation [42,45,47]. Regarding pH adjustment of the electrolyte solution it has been shown that furfuryl alcohol EChH preferred a pH of 5.0 while the yield of 2-methylfuran was optimal at pH 1.0, underlining the importance of acidity control for each EChH reaction [43].…”

Developing electrochemical hydrogenation towards industrial application

“…, due to ion interaction with electrode surface and blocking of active sites. 308 Additionally, multiple groups have pointed out the importance of pH adjustment to control side reactions and component decomposition. 60,207,309 It has been shown in these works that, while low pH is a major contributor to an increased hydrogen production, alkaline pH can facilitate decomposition of less durable substrates.…”