An amorphous FeCoNiMnCr high-entropy alloy supported by 2H-MoS₂ on carbon cloth as a highly efficient and robust electrocatalyst for water oxidation

Abstract

Efficient and robust electrocatalysts towards the oxygen evolution reaction (OER) are highly desirable in electrochemical systems for applications including water splitting and metal-air batteries. Herein, we report the preparation of...

Nanostructured High Entropy Alloys as Structural and Functional Materials

“…Nanosized HEAs for OER have garnered significant attention, and the reported data for their activity and stability are summarized in Figure . The difference between alkaline OER ,,− ,,,,,,,,− and acidic OER, ,− as observed in bulk catalysts, remains evident for nanosized HEA catalysts. The majority of research efforts have been dedicated to alkaline OER, resulting in the synthesis of exceptional HEA OER catalysts, such as MnFeCo­NiCuAu, AlNiCo­RuMo, and FeCoNi­MnRu, exhibiting η 10 values below 300 mV and Tafel slopes below 60 mV/dec The outstanding performance can be attributed to nanostructuring and tailed electronic structures .…”

“…(d) Acidic Stability tests of different low dimension HEA catalysts. Alkaline data was obtained from refs , , − , , , , , , , , and − and acidic data from refs and − .…”

Novel High-Entropy FeCoNiMoZn-Layered Hydroxide as an Efficient Electrocatalyst for the Oxygen Evolution Reaction

“…Hydrogen with high combustion efficiency and green renewability has been widely recognized as a promising and achievable new energy source to replace fossil fuel [1,2]. Electrochemical water splitting is a highly efficient hydrogen production technology without polluting byproducts [3,4]. Nevertheless, as one of the key reactions of water electrolysis, the oxygen evolution reaction (OER) suffers from high overpotential and sluggish reaction kinetics as a result of the complicated four-electron transfer process [5][6][7].…”

“…Nevertheless, as one of the key reactions of water electrolysis, the oxygen evolution reaction (OER) suffers from high overpotential and sluggish reaction kinetics as a result of the complicated four-electron transfer process [5][6][7]. Currently, noble metal-based electrocatalysts, including RuO 2 and IrO 2 , are considered excellent electrocatalysts for OER [3,5,8]. However, their scarcity, high price, poor durability, and low selectivity restricted their large-scale commercial application [9][10][11].…”

The in situ phosphorization inducing oxygen vacancies in the core–shell structured NiFe oxides boosts the electrocatalytic activity for the oxygen evolution reaction

“…In general, exposing more active sites can be achieved by designing the microstructure of electrocatalysts. Creating more edge sites with special structures, such as nanospheres, 24 nanosheets, 25 porous structures 26 as well as the core–shell structures, can enlarge the specific surface area and increase their catalytic active sites. 27 The porous microstructure of metal–organic frameworks (MOFs) makes them promising for the preparation of TMOs with porous structures.…”