Kinetically controlled synthesis of Co3O4 nanoparticles on Ni(OH)2 nanosheet arrays for efficient oxygen evolution reaction

Hongfang Du; Qing Chen; Long Cheng; Zhuzhu Du; Boxin Li; Tingfeng Wang; Ke Wang; Song He; Wei Ai

doi:10.1016/j.ces.2024.120094

Kinetically controlled synthesis of Co₃O₄ nanoparticles on Ni(OH)₂ nanosheet arrays for efficient oxygen evolution reaction

Hongfang Du
, Qing Chen
, Long Cheng
, Zhuzhu Du
, Boxin Li
, Tingfeng Wang
, Ke Wang
, Song He
, Wei Ai

Institute of Flexible Electronics

Fujian Normal University
Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Co₃O₄ is a promising electrocatalyst for oxygen evolution reaction (OER), yet its controllable synthesis has been challenging. Herein, a versatile approach is developed to fabricate Co₃O₄ nanoparticles (NPs) on diverse supports through the hydrothermal treatment of Co(NH₃)₆³⁺ with an ammonia mediator. The ammonia is critical as it determines the dissociation kinetics of Co(NH₃)₆³⁺, which in turn affects the nucleation and growth processes for kinetically controlling the size and dispersion of Co₃O₄ NPs. The Co₃O₄ NPs grown on 3D architectured Ni(OH)₂ nanosheet arrays (Co₃O₄@Ni(OH)₂) are applied as the catalysts for OER. Promoting by electron migration from Ni(OH)₂ to Co₃O₄ to improve the intrinsic activity and the structural merits, the optimal Co₃O₄@Ni(OH)₂ exhibits excellent OER performance, showing a competitive η₁₀₀ of 399 mV and a small Tafel slope of 60 mV dec⁻¹. This research presents a simple and efficient ammonia-mediated strategy to controllably synthesize Co₃O₄ on various supports for OER and beyond.

Original language	English
Article number	120094
Journal	Chemical Engineering Science
Volume	293
DOIs	https://doi.org/10.1016/j.ces.2024.120094
State	Published - 5 Jul 2024

Keywords

CoO
Cobalt ammonia complex
Controllable synthesis
Ni(OH)
Oxygen evolution reaction

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title = "Kinetically controlled synthesis of Co3O4 nanoparticles on Ni(OH)2 nanosheet arrays for efficient oxygen evolution reaction",

abstract = "Co3O4 is a promising electrocatalyst for oxygen evolution reaction (OER), yet its controllable synthesis has been challenging. Herein, a versatile approach is developed to fabricate Co3O4 nanoparticles (NPs) on diverse supports through the hydrothermal treatment of Co(NH3)63+ with an ammonia mediator. The ammonia is critical as it determines the dissociation kinetics of Co(NH3)63+, which in turn affects the nucleation and growth processes for kinetically controlling the size and dispersion of Co3O4 NPs. The Co3O4 NPs grown on 3D architectured Ni(OH)2 nanosheet arrays (Co3O4@Ni(OH)2) are applied as the catalysts for OER. Promoting by electron migration from Ni(OH)2 to Co3O4 to improve the intrinsic activity and the structural merits, the optimal Co3O4@Ni(OH)2 exhibits excellent OER performance, showing a competitive η100 of 399 mV and a small Tafel slope of 60 mV dec−1. This research presents a simple and efficient ammonia-mediated strategy to controllably synthesize Co3O4 on various supports for OER and beyond.",

keywords = "CoO, Cobalt ammonia complex, Controllable synthesis, Ni(OH), Oxygen evolution reaction",

author = "Hongfang Du and Qing Chen and Long Cheng and Zhuzhu Du and Boxin Li and Tingfeng Wang and Ke Wang and Song He and Wei Ai",

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doi = "10.1016/j.ces.2024.120094",

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T1 - Kinetically controlled synthesis of Co3O4 nanoparticles on Ni(OH)2 nanosheet arrays for efficient oxygen evolution reaction

AU - Du, Hongfang

AU - Chen, Qing

AU - Cheng, Long

AU - Du, Zhuzhu

AU - Li, Boxin

AU - Wang, Tingfeng

AU - Wang, Ke

AU - He, Song

AU - Ai, Wei

PY - 2024/7/5

Y1 - 2024/7/5

N2 - Co3O4 is a promising electrocatalyst for oxygen evolution reaction (OER), yet its controllable synthesis has been challenging. Herein, a versatile approach is developed to fabricate Co3O4 nanoparticles (NPs) on diverse supports through the hydrothermal treatment of Co(NH3)63+ with an ammonia mediator. The ammonia is critical as it determines the dissociation kinetics of Co(NH3)63+, which in turn affects the nucleation and growth processes for kinetically controlling the size and dispersion of Co3O4 NPs. The Co3O4 NPs grown on 3D architectured Ni(OH)2 nanosheet arrays (Co3O4@Ni(OH)2) are applied as the catalysts for OER. Promoting by electron migration from Ni(OH)2 to Co3O4 to improve the intrinsic activity and the structural merits, the optimal Co3O4@Ni(OH)2 exhibits excellent OER performance, showing a competitive η100 of 399 mV and a small Tafel slope of 60 mV dec−1. This research presents a simple and efficient ammonia-mediated strategy to controllably synthesize Co3O4 on various supports for OER and beyond.

AB - Co3O4 is a promising electrocatalyst for oxygen evolution reaction (OER), yet its controllable synthesis has been challenging. Herein, a versatile approach is developed to fabricate Co3O4 nanoparticles (NPs) on diverse supports through the hydrothermal treatment of Co(NH3)63+ with an ammonia mediator. The ammonia is critical as it determines the dissociation kinetics of Co(NH3)63+, which in turn affects the nucleation and growth processes for kinetically controlling the size and dispersion of Co3O4 NPs. The Co3O4 NPs grown on 3D architectured Ni(OH)2 nanosheet arrays (Co3O4@Ni(OH)2) are applied as the catalysts for OER. Promoting by electron migration from Ni(OH)2 to Co3O4 to improve the intrinsic activity and the structural merits, the optimal Co3O4@Ni(OH)2 exhibits excellent OER performance, showing a competitive η100 of 399 mV and a small Tafel slope of 60 mV dec−1. This research presents a simple and efficient ammonia-mediated strategy to controllably synthesize Co3O4 on various supports for OER and beyond.

KW - CoO

KW - Cobalt ammonia complex

KW - Controllable synthesis

KW - Ni(OH)

KW - Oxygen evolution reaction

UR - https://www.scopus.com/pages/publications/85189707283

U2 - 10.1016/j.ces.2024.120094

DO - 10.1016/j.ces.2024.120094

M3 - 文章

AN - SCOPUS:85189707283

SN - 0009-2509

VL - 293

JO - Chemical Engineering Science

JF - Chemical Engineering Science

M1 - 120094

ER -

Kinetically controlled synthesis of Co₃O₄ nanoparticles on Ni(OH)₂ nanosheet arrays for efficient oxygen evolution reaction

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Keywords

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