Noble-metal-free cobalt hydroxide nanosheets for efficient electrocatalytic oxidation

Lan, Jie; Qi, Daizong; Song, Jie; Liu, Peng; Liu, Yi; Pan, Yun‐Xiang

doi:10.1007/s11705-020-1920-2

Cited by 10 publications

(6 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their findings show that cobalt hydroxide nanosheets have a lower overpotential (306 mV at 10 mA/cm 2 ) than nanoparticles (367 mV at 10 mA/cm 2 ). 30 Moreover, cobalt-based compounds (mainly oxides and hydroxides) offer poor electrical conductivity, resulting in a limited charge transfer efficiency and reduced catalytic activity. As a result, to maximize catalytic activity in water splitting, cobalt-based catalysts with a large active surface area and high conductivity must be designed.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Role of CoTe/Co₃O₄ Composite Catalyst for Enhanced Oxygen Evolution Reaction

Rani,

Ahmed,

Dastider

et al. 2023

ACS Appl. Eng. Mater.

View full text Add to dashboard Cite

We prepared a cobalt oxide composite with cobalt telluride (CT@CO) via a hydrothermal approach, and this material acts as a highly active and durable electrocatalyst for the oxygen evolution reaction. The X-ray studies reveal that a spinel phase of cobalt oxide and a hexagonal phase of cobalt telluride have been formed. The field emission scanning electron microscopy (FESEM) study shows that cobalt telluride has nanosheet morphology, and a nanorod morphology has been obtained for cobalt oxide. X-ray photoelectron spectroscopy and Raman spectroscopy also confirm the successful interaction between Co 3 O 4 and CoTe. This CoTe/Co 3 O 4 (CT@CO sample) nanosheet-nanorod-shaped catalyst shows excellent OER performance compared with its constituent. It generates a current density of 10 mA/cm 2 at a low overpotential of 287 mV and Tafel slope (69 mV/dec). The electrochemical impedance spectroscopy (EIS) study reveals that the composite has the smallest charge transfer resistance than others. These findings suggest that CoTe/Co 3 O 4 (CT@CO) composite has a promising catalytic property for efficient OER generation. density functional theory (DFT) studies have also been performed, and the theoretical findings agree well with the experimental result.

show abstract

Section: Introductionmentioning

confidence: 99%

Exploring the Role of CoTe/Co₃O₄ Composite Catalyst for Enhanced Oxygen Evolution Reaction

Rani,

Ahmed,

Dastider

et al. 2023

ACS Appl. Eng. Mater.

View full text Add to dashboard Cite

show abstract

“…At present, various sensors have been developed to detect hydrogen peroxide [7]. Generally, the detection methods mainly include electrochemical methods [8,9], chromatography [10], fluorescence [11,12], chemiluminescence [13,14], colorimetry [15][16][17] etc. However, most of the methods require the use of expensive and bulky instruments and equipment.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mesoporous CuO Hollow Sphere Nanozyme for Paper-Based Hydrogen Peroxide Sensor

et al. 2021

View full text Add to dashboard Cite

Point-of-care monitoring of hydrogen peroxide is important due to its wide usage in biomedicine, the household and industry. Herein, a paper sensor is developed for sensitive, visual and selective detection of H2O2 using a mesoporous metal oxide hollow sphere as a nanozyme. The mesoporous CuO hollow sphere is synthesized by direct decomposition of copper–polyphenol colloidal spheres. The obtained mesoporous CuO hollow sphere shows a large specific surface area (58.77 m2/g), pore volume (0.56 cm3/g), accessible mesopores (5.8 nm), a hollow structure and a uniform diameter (~100 nm). Furthermore, they are proven to show excellent peroxidase-like activities with Km and Vmax values of 120 mM and 1.396 × 10−5 M·s−1, respectively. Such mesoporous CuO hollow spheres are then loaded on the low-cost and disposable filter paper test strip. The obtained paper sensor can be effectively used for detection of H2O2 in the range of 2.4–150 μM. This work provides a new kind of paper sensor fabricated from a mesoporous metal oxide hollow sphere nanozyme. These sensors could be potentially used in bioanalysis, food security and environmental protection.

show abstract

“…Therefore, designing and developing inexpensive, earth-abundant, and highly stable transition-metal-based catalysts for water cleavage response is a more engaging and challenging task. So far, numerous studies on non-noble-metal catalysts developed based on transition-metal compounds such as oxides, hydroxides, , phosphides, chalcogenides, carbides, and nitrides have been reported. Some of the materials developed could even exceed the catalytic activity of noble-metal catalysts in an alkaline medium .…”

Section: Introductionmentioning

confidence: 99%

New Insight into the Electrocatalysis of Ni-Rich Trimetallic NCM-Based Hydroxides for Water Oxidation

Venkatkarthick

Niu

Srikhaow

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Earth-abundant multimetal hydroxides, especially of Ni−Co−Mn-based NCM materials, are very attractive candidates as energy storage materials because of their unique characteristics of synergy with multimetal components, higher electrochemical activity, and lower activation energy compared with a single metal element. The typical hydroxide materials are used as precursors for developing lithium-containing bulk NCM oxide compositions upon calcination with lithium salts at higher temperatures and used as viable cathodes in lithium-ion batteries (LIBs). Nevertheless, the lithium-deficient typical NCM oxide composite (LiNi 0.5 Co 0.2 Mn 0.3 O 2 or NCM-523) with a disordered structure was found to have superior electrocatalytic activity than its intact original structure for the water splitting reaction. Herein, we have elaborately investigated the electrocatalytic activity of the typical NCM hydroxide materials without lithium for the two significant compositions, viz., NCM-523 and NCM-811, prepared by a simple co-precipitation method for the oxygen evolution reaction (OER) in an alkaline electrolyte for the first time. Interestingly, the NCM-811 composite exhibits improved catalytic activity with the lowest onset potential (∼1.5 V) and Tafel slope (∼91.7 mV dec −1 ) for better OER kinetics, whereas the NCM-523 composite exhibits a slightly higher onset potential (∼1.55 V) and Tafel slope (∼175.6 mV dec −1 ). The ideal composition showed a stable catalytic performance of 25 h continuous water electrolysis. This work can pave ways for the progress of plentiful multi-transition-metal-based hydroxides with virtually tunable compositions for cutting-edge affordable electrocatalytic materials.

show abstract

Noble-metal-free cobalt hydroxide nanosheets for efficient electrocatalytic oxidation

Cited by 10 publications

References 35 publications

Exploring the Role of CoTe/Co₃O₄ Composite Catalyst for Enhanced Oxygen Evolution Reaction

Exploring the Role of CoTe/Co₃O₄ Composite Catalyst for Enhanced Oxygen Evolution Reaction

Synthesis of Mesoporous CuO Hollow Sphere Nanozyme for Paper-Based Hydrogen Peroxide Sensor

New Insight into the Electrocatalysis of Ni-Rich Trimetallic NCM-Based Hydroxides for Water Oxidation

Contact Info

Product

Resources

About

Noble-metal-free cobalt hydroxide nanosheets for efficient electrocatalytic oxidation

Cited by 10 publications

References 35 publications

Exploring the Role of CoTe/Co3O4 Composite Catalyst for Enhanced Oxygen Evolution Reaction

Exploring the Role of CoTe/Co3O4 Composite Catalyst for Enhanced Oxygen Evolution Reaction

Synthesis of Mesoporous CuO Hollow Sphere Nanozyme for Paper-Based Hydrogen Peroxide Sensor

New Insight into the Electrocatalysis of Ni-Rich Trimetallic NCM-Based Hydroxides for Water Oxidation

Contact Info

Product

Resources

About

Exploring the Role of CoTe/Co₃O₄ Composite Catalyst for Enhanced Oxygen Evolution Reaction

Exploring the Role of CoTe/Co₃O₄ Composite Catalyst for Enhanced Oxygen Evolution Reaction