Green synthesis of hybrid papain/Ni₃(PO₄)₂ rods electrocatalyst for enhanced oxygen evolution reaction

Abstract

Hydrogen production using electrocatalytic water splitting provides encouraging innovation for endurable and clean energy generation as option in contrast to traditional energy sources. Improvement of exceptionally dynamic electrocatalysts is of...

Bio-assisted Synthesis of Au/Rh Nanostructure Electrocatalysts for Hydrogen Evolution and Methanol Oxidation Reactions: Composition Matters!

“…To investigate the HER performance of the as-synthesized catalysts, initially, we performed linear sweep voltammetry (LSV) measurements at a scan rate of 10 mV/s (Figure a). The overpotential values of Au, Rh, Au 0.75 Rh 0.25 , Au 0.50 Rh 0.50 , and Au 0.25 Rh 0.75 were 283, 231, 167, 132, and 105 mV to produce a current density of 10 mA/cm 2 , respectively (considering the geometrical surface area of the electrode), whereas commercial Pt/C showed an overpotential of 34 mV (Figure a) . The Tafel slope was calculated from the corresponding LSV curves to provide the information about the reaction kinetics during the HER process.…”

NiS/MoS2 Anchored Multiwall Carbon Nanotube Electrocatalyst for Hydrogen Generation and Energy Storage Applications

“…Hence, the association of appropriate functional inorganic compounds is an effective approach to modulate the structural motif as well as the desired capabilities owing to the particular virtues of the inorganic compounds that are mainly incorporated into the solids structure and acting as an efficient materials energy generation and storage applications. [1,2] The exploration of low-cost and efficient bifunctional electrocatalysts for the OER, [3,4] hydrogen evolution reaction (HER), [5,6] and supercapacitors offer promising opportunities for sustainable energy sources due to the rapid depletion of fossil fuels. Promising renewable energy technolo-gies such as electrocatalytic water splitting has attracted considerable attention from researchers in recent years to find a possible solution to generate stable and sustainable clean hydrogen fuels, but the most effective state-of-the-art catalysts are noble metals such as Pt, IrO 2 , and RuO 2 in OER and HER, which are expensive and scarce, thereby extremely limiting their practical uses.…”

Bifunctional electrochemical OER and HER activity of Ta2O5 nanoparticles over Fe2O3 nanoparticles

“…Combating these problems requires the global adoption of renewable and clean energy sources. 1,2 Various methods are being developed to convert, store and use green energy, including CO 2 reduction, 3 methanol oxidation, 4 rechargeable metal-air batteries 5 and water electrolysis, [6][7][8][9][10][11] Hydrogen energy is a promising solution to reducing over-depletion of ozone and fossil fuels, major contributors to global warming. 8 Due to its high energy density and CO 2 -free emissions, hydrogen energy has become increasingly important and is considered one of the most important alternatives to replace fossil fuels.…”

“…Electrocatalytic water splitting involves two reactions: the cathodic hydrogen evolution reaction (HER) [12][13][14][15] and the anodic oxygen evolution reaction (OER). 10,[16][17][18][19][20][21] Both mechanisms require the transfer of electrons, but the OER is slower with a four-electron transfer. Therefore, a catalyst material capable of reducing overpotentials in the OER reaction and performing well in the HER is of crucial.…”