Constructing a hexagonal copper-coin-shaped NiCoSe₂@NiO@CoNi₂S₄@CoS₂ hybrid nanoarray on nickel foam as a robust oxygen evolution reaction electrocatalyst

Abstract

The as-obtained hexagonal copper-coin-shaped NiCoSe2@NiO@CoNi2S4@CoS2 electrode can serve as a high-performance electrocatalyst for the oxygen evolution reaction under electrochemical reaction conditions.

Nano‐Micro‐Structured Nickel‐Cobalt Hydroxide/Ni2P2O7 Assembly on Nickel Foam: An Outstanding Electrocatalyst for Alkaline Oxygen Evolution Reaction

“…Many transition‐metal oxides and hydroxides such as NiO, Ni(OH) 2 , and Ni−Co‐hydroxides have been successfully implemented, exhibiting noteworthy OER performance; however, poor electrical conductivity is an important issue that leads to degraded performance . Moreover, 3D structures such as metal of Ni−Co−S//Ni−Co−P nanowires arrays, NiCoSe 2 @NiO@CoNi 2 S 4 @CoS 2 hybrid structures and hierarchical heterostructures of NiCo 2 O 2 @CoMoO 4 nano‐fibers, Ni 3 S 2 nano‐sheets coated on Co 3 O 4 nano needle arrays has been found efficient as bifunctional and OER catalyst . Along with 3D structures and hierarchical structures many strategies have been implemented to enhance the conductivity as well as streamline the electrochemical reaction towards the OER rather than redox reactions, such as incorporation of a nanocatalyst into the host material to enhance the catalytic activity and stability, and combining a metal‐organic framework with a nanocatalyst .…”

“…[14][15][16][17] Moreover, 3D structures such as metal of NiÀ CoÀ S//NiÀ CoÀ P nanowires arrays, NiCoSe 2 @NiO@CoNi 2 S 4 @CoS 2 hybrid structures and hierarchical heterostructures of NiCo 2 O 2 @CoMoO 4 nano-fibers, Ni 3 S 2 nanosheets coated on Co 3 O 4 nano needle arrays has been found efficient as bifunctional and OER catalyst. [18][19][20][21] Along with 3D structures and hierarchical structures many strategies have been implemented to enhance the conductivity as well as streamline the electrochemical reaction towards the OER rather than redox reactions, such as incorporation of a nanocatalyst into the host material to enhance the catalytic activity and stability, and combining a metal-organic framework with a nanocatalyst. [22,23] However, the metal-organic incorporation strategy requires high-temperature annealing, which is not energy efficient.…”

Facile Synthesis of Three‐dimensional Hierarchical Ni3S2@CoAl‐LDHs Nanosheet Arrays and Their Efficient Hydrogen Evolution

“…Noble metals such as FeNi-LDH/ Ru, [21] CoNi-LDH/Au [22] and Ni(OH) 2 À PtO 2 [23] take advantages of the excellent catalytic performance, however, the high cost must be considered. Transition metal-based electrocatalysts such as sulfides, [24][25][26] phosphides [27][28] and nitrides [29] have also been widely studied as HER catalysts. Among them, transition metal sulfides (TMSs) can overcome the disadvantages brought by precious metals and are considered to be one of the most suitable materials towards HER process owing to the high electron conductivity and superior stability.…”

Crossed NiCo2S4 Nanowires Supported on Nickel Foam as a Bifunctional Catalyst for Efficient Overall Water Splitting

“…Electrochemical water splitting, which consists of two half reactions oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is regarded as a new environment‐friendly method for hydrogen production . In order to expedite reaction rate and decrease overpotential, an efficient, cost effective and robust overall water splitting electrocatalyst is critically required . For the moment, Ir‐ and Ru‐based precious‐metal compounds have been distinguished to be the most prosperous OER and HER catalysts, but high cost and limited resources prohibit their widespread applications .…”