Fast microwave-induced synthesis of solid cobalt hydroxide nanorods and their thermal conversion into porous cobalt oxide nanorods for efficient oxygen evolution reaction

Abstract

Oxygen evolution reaction (OER) in water splitting is one of the most critical and more demanding half-reactions in electrochemical devices; therefore, the design of highly efficient and nonprecious metal-based electrocatalysts is required.

Inception of Co3O4as Microstructural Support to Promote Alkaline Oxygen Evolution Reaction for Co0.85Se/Co9Se8Network

“…Spinel-type Co 3 O 4 is well-known for their conductivity, long-term stability, and easy handling features. , Electrochemical OER performance of Co 3 O 4 can be tuned by numerous ways like morphological variation, quantum dot design, controlling porosity, metal dopant, defect generation, conductive substance incorporation, coupling with other materials, and more. Metal ion dopants can effectively modify the electronic state of Co 3 O 4 , which further validates improved activity with prompt OER kinetics via lowering the charge-transfer resistance .…”

Interfacial Engineering FeOOH/CoO Nanoneedle Array for Efficient Overall Water Splitting Driven by Solar Energy

“…Strategies also have been developed to improvet heir activity,i ncluding engineering of morphology, structure, composition as well as interface. [9][10][11][12][13][14] For example, variousm orphologies includingo ne-dimensional nanorod, [9] porousn anowirea rray [10] and hollow nanoparticles [11] have been reported to increase the specific surfacea rea and active sites. Composition engineering by doping heteroatoms, [12] or hybridization with other functional materials [13] is utilized to alter the local electronic structure and charge/massc onductivity of the cobalt oxides.…”

Rational Engineering CoxOy Nanosheets via Phosphorous and Sulfur Dual‐Coupling for Enhancing Water Splitting and Zn–Air Battery

“…Figure a shows typical IV adsorption–desorption isotherms of the Co x O y /Cu@CuS NWs, S‐Co x O y /Cu@CuS NWs, and P,S‐Co x O y /Cu@CuS NWs with hysteresis loops at a relative pressure of ≈0.45, suggesting that they were mesoporous structures. [ 22 ] The specific surface areas of the Co x O y /Cu@CuS NWs, S‐Co x O y /Cu@CuS NWs, and P,S‐Co x O y /Cu@CuS NWs were found to be 76.15, 73.60, and 74.57 m 2 g −1 , respectively, relatively higher than that of other related catalysts reported early, such as Co 3 O 4 nanorods (70 m 2 g −1 ), [ 23 ] Co 3 O 4 @TiO 2 nanorods (55.3 m 2 g −1 ), [ 24 ] Co 4 Ni 1 P nanotubes (55.6 m 2 g −1 ), [ 25 ] and Co 3 O 4 ‐CuO nanofibers (39 m 2 g −1 ). [ 26 ] The pore size distribution of the materials according to the Barrett–Joyner–Halenda method (Figure 2b) was found to be around 15–25 nm.…”