A universal, green, and self-reliant electrolytic approach to high-entropy layered (oxy)hydroxide nanosheets for efficient electrocatalytic water oxidation

Li, Mingzhong; Xi, Xiangyun; Wang, Hao; Lyu, Xuanyu; Li, Zhicheng; Zhu, Run; Ren, Xuhua; Yang, Dong; Dong, Angang

doi:10.1016/j.jcis.2022.02.135

Cited by 16 publications

(7 citation statements)

References 70 publications

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“…Co(OH) 2 nanoplates were synthesized by direct electrolysis in a two-electrode system, which has been previously reported . In a typical synthesis of Co(OH) 2 , the Co foil was used as the anode, with a Pt sheet (10 mm × 10 mm × 0.1 mm) as the cathode and 150 mL of 1.0 M KCl aqueous solution as the electrolyte.…”

Section: Methodsmentioning

confidence: 99%

“…Co(OH) 2 nanoplates were synthesized by direct electrolysis in a twoelectrode system, which has been previously reported. 34 In a typical synthesis of Co(OH) 2 , the Co foil was used as the anode, with a Pt sheet (10 mm × 10 mm × 0.1 mm) as the cathode and 150 mL of 1.0 M KCl aqueous solution as the electrolyte. Before electrolytic anode oxidation, the Co foils were ultrasonically cleaned in acetone, isopropanol, and methanol sequentially, followed by rinsing with deionized water and drying in air.…”

Section: ■ Introductionmentioning

confidence: 99%

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Elucidating the Geometric Active Sites for Oxygen Evolution Reaction on Crystalline Iron-Substituted Cobalt Hydroxide Nanoplates

Cong

Deng

et al. 2023

Anal. Chem.

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Transition-metal (oxy)hydroxides are among the most active and studied catalysts for the oxygen evolution reaction in alkaline electrolytes. However, the geometric distribution of active sites is still elusive. Here, using the well-defined crystalline iron-substituted cobalt hydroxide as a model catalyst, we reported the scanning electrochemical cell microscopy (SECCM) study of single-crystalline nanoplates, where the oxygen evolution reaction at individual nanoplates was isolated and evaluated independently. With integrated prior- and post-SECCM scanning electron microscopy of the catalyst morphology, correlated structure–activity information of individual electrocatalysts was obtained. Our result reveals that while the active sites are largely located at the edges of the pristine Co(OH)2 nanoplates, the Fe lattice incorporation significantly promotes the basal plane activities. Our approach of correlative imaging provides new insights into the effect of iron incorporation on active site distribution across nano-electrocatalysts.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Elucidating the Geometric Active Sites for Oxygen Evolution Reaction on Crystalline Iron-Substituted Cobalt Hydroxide Nanoplates

Cong

Deng

et al. 2023

Anal. Chem.

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“…A systematic analysis of the composition and structure of the prepared quinary layered (oxy) hydroxide (CoFeNiCrV-LH) nanosheets reveals that they have an optimized defect-rich low-crystalline structure. 112 These optimized accessible active sites and the defect-rich low-crystalline structure were observed to originate from an entropy-driven lattice structure with high conguration entropy. The optimized accessible active sites effectively promoted charge transfer, mass transport, and the formation of reactive intermediates, and electrochemical data suggest improved performance of the OER catalyst (Fig.…”

Section: Derivatives Of Heasmentioning

confidence: 97%

Future prospects of high-entropy alloys as next-generation industrial electrode materials

Bolar,

Ito,

Fujita

2024

Chem. Sci.

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“…72 Graphene further buffers the volume expansion of the electrode and ensures superior electrical conductivity. Beyond that, the morphology modulation of electrode materials is also an aspect that cannot be ignored, such as but not limited to HEO nanofibers, 73,74 nanosheets, 67,75 porous network, 76 hollow microspheres. 77 The geometry often involves specific effects on material specific surface area, charge accommodation space, electron transfer paths, volume changes, and so forth.…”

Section: Advanced Synthesis and Modificationmentioning

confidence: 99%

High‐entropy oxide: A future anode contender for lithium‐ion battery

Liu

et al. 2022

EcoMat

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Revolutionary changes in energy storage technology have put forward higher requirements on next-generation anode materials for lithium-ion battery. Recently, a new class of materials with complex stoichiometric ratios, highentropy oxide (HEO), has gradually emerging into sight and embracing the prosperity. The ideal elemental adjustability and attractive synergistic effect make HEO promising to break through the integrated performance bottleneck of conventional anodes and provide new impetus for the design and development of electrochemical energy storage materials. Here, the research progress of HEO anodes is comprehensively reviewed. The driving force behind phase stability, the role of individual cations, potential mechanisms for controlling properties, as well as state-of-the-art synthetic strategies and modification approaches are critically evaluated. Finally, we envision the future prospects and related challenges in this field, which will bring some enlightening guidance and criteria for researchers to further unlock the mysteries of HEO anodes.

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A universal, green, and self-reliant electrolytic approach to high-entropy layered (oxy)hydroxide nanosheets for efficient electrocatalytic water oxidation

Cited by 16 publications

References 70 publications

Elucidating the Geometric Active Sites for Oxygen Evolution Reaction on Crystalline Iron-Substituted Cobalt Hydroxide Nanoplates

Elucidating the Geometric Active Sites for Oxygen Evolution Reaction on Crystalline Iron-Substituted Cobalt Hydroxide Nanoplates

Future prospects of high-entropy alloys as next-generation industrial electrode materials

High‐entropy oxide: A future anode contender for lithium‐ion battery

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