Layered vanadium oxide nanofibers as impressive electrocatalyst for hydrogen evolution reaction in acidic medium

Engineered 2D Transition Metal Dichalcogenides—A Vision of Viable Hydrogen Evolution Reaction Catalysis

“…[ 174 ] Some metal phosphides showed good alkaline HER performance, and also good oxidation resistance in both the acidic and alkaline electrolytes owing to relatively strong bonds between the metal and phosphide atoms. [ 173–176 ] Nevertheless, metal phosphides are typically nonlayered materials which increases the materials usage in the catalysis. The full exposure and participation of the surface and edges in the HER render particular advantages of 2D TMDs, although significant modifications of the materials (e.g., doping and hybrid structure) and relating engineering works of the electrode (e.g., 3D electrode) are still required to improve the HER performance.…”

Electrochemical reduction of CO2to ethylene on Cu/CuxO-GO composites in aqueous solution

“…It is pertinent mention here that it is a well-known and reported fact that CO 2 saturation makes the aqueous electrolyte solutions more acidic. It is also well known that hydrogen evolution becomes more prevalent in acidic solutions 19,26,27 Hence, the production of H 2 gas is increased in presence of CO 2 as compared to that in presence of Ar. However, the competitive production H 2 can be suppressed over the certain electro-catalyst surfaces that are less active for hydrogen evolution but highly active for ECR.…”

Physical Barricading at the Nanoscale: Protecting Pyrite from Weathering toward Efficient and Stable Electrocatalysis of the Oxygen Evolution Reaction

“…It is a gigantic challenge for the research community to produce energy via adapting the green route. , Consequently, all over the world, researchers are regularly working on alternative green energy sources. − In this context, water splitting is an important alternative found to be more efficient toward sustainable energy development and storage. − Electrochemical water splitting is a combination of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER), which take place at the anode and cathode, respectively. , Sustainable H 2 production depends upon the sluggish OER process during water splitting. Moreover, it is evident that the anodic OER process is the rate-determining step and it requires a high overpotential in both acidic and alkaline conditions. − Currently, alkaline water electrolysis is the point of interest because hydroxide anions (OH – ) are the major charge carriers in liquid ion-conducting electrolytes. , Hence, the water electrolysis performance and its competency directly depend upon the electrocatalyst used for this purpose. Therefore, OER electrocatalysts must be highly efficient and stable in alkaline medium and oxidative environmental conditions without weathering and dissolution. − …”

“…3−5 Electrochemical water splitting is a combination of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER), which take place at the anode and cathode, respectively. 5,6 Sustainable H 2 production depends upon the sluggish OER process during water splitting. Moreover, it is evident that the anodic OER process is the rate-determining step and it requires a high overpotential in both acidic and alkaline conditions.…”