Selenization of NiMn-layered double hydroxide with enhanced electrocatalytic activity for oxygen evolution

Abstract

Exploiting highly active oxygen evolution reaction electrocatalysts is of great importance in the cost-effective generation of clean fuels. Herein, the preparation of NiMn-layered double hydroxide with selenization is adopted to reduce the charge transfer resistance of the electrocatalytic oxygen evolution reaction and enhance electrocatalytic performance. As a result, this selenization product of NiMn-layered double hydroxide can reach a current density of 10 mA cm-2 at a low overpotential of 280 mV on glassy carbon electrode in 1.0 M KOH aqueous solution and have excellent stability, which makes them comparable to the most efficient IrO2 catalyst and better than most nickel based catalysts.

Deciphering the amplification of dual catalytic active sites of Se-doped NiV LDH in water electrolysis: a hidden gem exposure of anion doping at the core-lattice LDH framework

“…The 50 hours of CA study reveals that the catalyst Se-NiV LDH can maintain its 90.93% original activity under long-term exposure to a constant anodic potential, further certifying the great stability of the as-prepared catalysts. The comparison table of the OER activity and stability concerning different measured electrochemical parameters of our synthesized Se-NiV LDH material with similar kinds of previously reported catalysts is shown in Table S1 † 5,36,48–52,52,53 . Se-NiV LDH shows comparable results and in some cases, superior outcomes with respect to other previously reported catalysts, implying the overall excellent OER performance.…”

“…The comparison table of the OER activity and stability concerning different measured electrochemical parameters of our synthesized Se-NiV LDH material with similar kinds of previously reported catalysts is shown in Table S1. † 5,36,[48][49][50][51][52]52,53 Se-NiV LDH shows comparable results and in some cases, superior outcomes with respect to other previously reported catalysts, implying the overall excellent OER performance.…”

Low‐Dimensional Metallic Nanomaterials for Advanced Electrocatalysis

“…Finally, the formed M-OOH* reacted with OH − to yield O 2 . [127][128][129][130][131][132] Similar to the reaction mechanism in alkaline media, the acidic OER also involved the formation of M-OH*, M-O*, and M-OOH* intermediates. The major difference between the intermediate reaction steps of the acidic OER and alkaline OER is the interaction of intermediates with OH − or H 2 O.…”