Recent advances in non‐precious Ni‐based promising catalysts for water splitting application

Abstract

Summary The creation of hydrogen and oxygen from water can be a paramount way to produce clean fuel through Earth‐abundant and non‐precious photoelectrochemical (solar to hydrogen production) and electrocatalysis processes. Since two decades, nickel (Ni)‐based electrocatalysts are being extensively applied as bifunctional electrocatalysts. Here, recent advances of Ni‐based catalysts in electrochemistry for water splitting application through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) processes with evaluation parameters like dependency of the current density on the applied potential, overpotentials, and Tafel plots, etc., are brushed in brief. Various synthesis methods have also been reported with structural variations to identify the final active structure. Furthermore, based on previously published work on both OER and HER activities, disputes and outlook perspectives of Ni‐based electrolytes in the water splitting process are highlighted in succinct.

Precious-Metal-Free Solvothermally Synthesized CeO2 Nanosphere-Graphitic Carbon Nitride Sheet Composites for Oxygen Reduction Reaction

“…To further compare the ORR activity of all of the synthesized electrocatalysts along with commercial Pt/C, an LSV study was undertaken at 1600 rpm in the O 2 -saturated 0.1 M KOH. The onset potentials ( E onset ) were evaluated from the LSV curves (Figure b) by using the tangent method, where the onset is measured as the intersection point of the tangent of the rapidly increasing current segment and the background current that is parallel to the X -axis. , Before calculating the onset potential, the background current was corrected for all of the samples. The onset potential values are listed in Table .…”

Recent Advancements in the Synthetic Mechanism and Surface Engineering of Transition Metal Selenides for Energy Storage and Conversion Applications

“…As a result of their expanded contact area, immobilized carbon dopants, and multifunctional organizations, chemically synthesized TMSe composite materials have direct application to the target analyte. [100][101][102] Appropriate interface tuning changes increase the conductance of the redox probe by lowering the charge transmission resistance of the basic electrocatalyst. Consequently, the electrochemical cell has a quick mass diffusion broadcaster and a lower electron transport pathway.…”

A transparent iron-incorporated nickel hydroxide electrocatalyst for efficient water oxidation

“…Among the transition metal electrocatalysts, nickel (oxy)hydroxides have shown great potential as efficient electrocatalysts for the OER due to the accessible current density of 10 mA cm −2 at a relatively small overpotential. 27,28 The electrocatalytic activities of nickel-based electrocatalysts for the OER were found to be greatly dependent on the presence of iron. 20,27,[29][30][31] In fact, nickel is always found in combination with iron in nature.…”