Sulfur enriched cobalt-based layered double hydroxides for oxygen evolution reactions

Copper-Doped Cobalt Oxychloride for Efficient Oxygen Evolution Reactions in an Alkaline Medium

“…1−5 The electrochemical oxygen evolution reaction (OER) is a complex four-electron proton transfer process, which owes to its slower kinetics due to the bond formation of oxygen to oxygen. [1][2][3]6 Hence, fabricating an efficient OER electrocatalyst is the dire need of the hour. 7,8 It is well recognized that an active hydroxide, more preferably an oxyhydroxide layer, is formed on the surface of the electrocatalyst in an alkaline environment.…”

“…Electrochemical oxygen evolution reaction (OER) is a key step in the energy storage and conversion process such as carbon dioxide reduction (CO 2 RR), rechargeable metal–air batteries, water electrolysis, and in fuel cells. − The electrochemical oxygen evolution reaction (OER) is a complex four-electron proton transfer process, which owes to its slower kinetics due to the bond formation of oxygen to oxygen. − , Hence, fabricating an efficient OER electrocatalyst is the dire need of the hour. , It is well recognized that an active hydroxide, more preferably an oxyhydroxide layer, is formed on the surface of the electrocatalyst in an alkaline environment. − Although active layers obtained from high valence metal oxy­(hydroxide) are believed to be the actual active species, this cannot explain why numerous catalysts exhibit different activities with respect to oxidation states. Additionally, understanding the relationship between catalytic performance and active elements is highly dependent on identifying the operando-structure at atomic-level precision. − Thus, it is essential to use very effective OER catalysts with a well-defined structure after reconstruction and to understand the relationship between structure–activity based on accurate recognition of reconstruction-derived components.…”

Exploring the potential of cobalt hydroxide and its derivatives as a cost-effective and abundant alternative to noble metal electrocatalysts in oxygen evolution reactions: a review

“…Hence, we can conclude that future researchers who are interested in OER electrocatalysis should consider the factor of electron-withdrawing groups in the material because the OER is highly dependent on how electron-deficient the metal center is. 124…”

“…Hence, we can conclude that future researchers who are interested in OER electrocatalysis should consider the factor of electron-withdrawing groups in the material because the OER is highly dependent on how electron-decient the metal center is. 124 Zhang et al 125 synthesized needle-like 3D carbonateincorporating Co(OH) 2 superstructures for the OER. The synthesis was a simple hydrothermal treatment using CoCl 2 -$6H 2 O as a source of cobalt, urea as a precipitating agent, and sodium glycolate as a surfactant.…”

A hybrid of MIL-53(Fe) rhombus and conductive CoNi2S4 nanosheets as a synergistic electrocatalyst for the oxygen evolution reaction

“…9,10 As the OER is a slow four-electron transfer process, which requires a much higher overpotential than that required for the HER, and is thus often considered as the bottleneck of electrolytic water hydrogen production technology. [11][12][13] Hence, the preparation of stable and efficient OER catalysts to reduce the reaction energy barrier and thus accelerate the progress of the OER is still a challenging task. While precious metal catalysts with high catalytic activity can effectively reduce the energy required to electrolyze water, the scarcity of precious metal materials is the reason for the high cost of hydrogen production from electrolytic water and also the main obstacle to the diffusion of this technology.…”