Activating Co sites activity in Co(OH)2 via VN coupling to facilitate highly efficient oxygen evolution reaction

Jing Tang; Wenjian Wan; Siyuan Liu; Weijun Li; Qingdong Ruan; Chao Huang

doi:10.1016/j.ijhydene.2023.12.144

Activating Co sites activity in Co(OH)₂ via VN coupling to facilitate highly efficient oxygen evolution reaction

Jing Tang, Wenjian Wan, Siyuan Liu, Weijun Li, Qingdong Ruan, Chao Huang^*

^*Corresponding author for this work

Department of Physics

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

3 Citations (Scopus)

Abstract

The quest for efficient electrocatalysts to drive the oxygen evolution reaction (OER) is paramount for renewable energy technologies such as water electrolysis. This study focuses on augmenting the catalytic activity of cobalt hydroxide (Co(OH)₂) electrocatalysts by strategically coupling them with vanadium nitride (VN) heterostructures (Co(OH)₂/VN@C). The synergistic effect between Co(OH)₂ and VN is explored to achieve a remarkable improvement in the OER performance that the hybrid Co(OH)₂/VN@C exhibits a low overpotential of 319 mV at a current density of 10 mA cm⁻² and a small Tafel slope of 65 mV dec⁻¹. Through characterization techniques and electrochemical measurements, we unveil the intricate interplay at the atomic level that triggers the activation of Co sites by V element, leading to an exceptional enhancement in catalytic activity and excellent stability. This work not only sheds light on the fundamental mechanisms involved in the Co(OH)₂/VN heterostructure interaction but also presents a promising strategy for designing highly efficient OER electrocatalysts. © 2023 Hydrogen Energy Publications LLC

Original language	English
Pages (from-to)	242-247
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	56
Online published	23 Dec 2023
DOIs	https://doi.org/10.1016/j.ijhydene.2023.12.144
Publication status	Published - 22 Feb 2024

Funding

Acknowledgments are extended to the Basic Scientific Research Project of the Education Department of Liaoning Province (Grant No. LJKMZ20220739), (JYTMS20231430), and the Research Foundation of Liaoning Petrochemical University (Grant No. 2019XJJL-022), Yunnan Provincial Rural Energy Engineering Key Laboratory (2022KF005) for their valuable support.

Research Keywords

Co(OH)2
Heterostructure
In situ Raman
Oxygen evolution reaction
VN

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title = "Activating Co sites activity in Co(OH)2 via VN coupling to facilitate highly efficient oxygen evolution reaction",

abstract = "The quest for efficient electrocatalysts to drive the oxygen evolution reaction (OER) is paramount for renewable energy technologies such as water electrolysis. This study focuses on augmenting the catalytic activity of cobalt hydroxide (Co(OH)2) electrocatalysts by strategically coupling them with vanadium nitride (VN) heterostructures (Co(OH)2/VN@C). The synergistic effect between Co(OH)2 and VN is explored to achieve a remarkable improvement in the OER performance that the hybrid Co(OH)2/VN@C exhibits a low overpotential of 319 mV at a current density of 10 mA cm−2 and a small Tafel slope of 65 mV dec−1. Through characterization techniques and electrochemical measurements, we unveil the intricate interplay at the atomic level that triggers the activation of Co sites by V element, leading to an exceptional enhancement in catalytic activity and excellent stability. This work not only sheds light on the fundamental mechanisms involved in the Co(OH)2/VN heterostructure interaction but also presents a promising strategy for designing highly efficient OER electrocatalysts. {\textcopyright} 2023 Hydrogen Energy Publications LLC",

keywords = "Co(OH)2, Heterostructure, In situ Raman, Oxygen evolution reaction, VN",

author = "Jing Tang and Wenjian Wan and Siyuan Liu and Weijun Li and Qingdong Ruan and Chao Huang",

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T1 - Activating Co sites activity in Co(OH)2 via VN coupling to facilitate highly efficient oxygen evolution reaction

AU - Tang, Jing

AU - Wan, Wenjian

AU - Liu, Siyuan

AU - Li, Weijun

AU - Ruan, Qingdong

AU - Huang, Chao

PY - 2024/2/22

Y1 - 2024/2/22

N2 - The quest for efficient electrocatalysts to drive the oxygen evolution reaction (OER) is paramount for renewable energy technologies such as water electrolysis. This study focuses on augmenting the catalytic activity of cobalt hydroxide (Co(OH)2) electrocatalysts by strategically coupling them with vanadium nitride (VN) heterostructures (Co(OH)2/VN@C). The synergistic effect between Co(OH)2 and VN is explored to achieve a remarkable improvement in the OER performance that the hybrid Co(OH)2/VN@C exhibits a low overpotential of 319 mV at a current density of 10 mA cm−2 and a small Tafel slope of 65 mV dec−1. Through characterization techniques and electrochemical measurements, we unveil the intricate interplay at the atomic level that triggers the activation of Co sites by V element, leading to an exceptional enhancement in catalytic activity and excellent stability. This work not only sheds light on the fundamental mechanisms involved in the Co(OH)2/VN heterostructure interaction but also presents a promising strategy for designing highly efficient OER electrocatalysts. © 2023 Hydrogen Energy Publications LLC

AB - The quest for efficient electrocatalysts to drive the oxygen evolution reaction (OER) is paramount for renewable energy technologies such as water electrolysis. This study focuses on augmenting the catalytic activity of cobalt hydroxide (Co(OH)2) electrocatalysts by strategically coupling them with vanadium nitride (VN) heterostructures (Co(OH)2/VN@C). The synergistic effect between Co(OH)2 and VN is explored to achieve a remarkable improvement in the OER performance that the hybrid Co(OH)2/VN@C exhibits a low overpotential of 319 mV at a current density of 10 mA cm−2 and a small Tafel slope of 65 mV dec−1. Through characterization techniques and electrochemical measurements, we unveil the intricate interplay at the atomic level that triggers the activation of Co sites by V element, leading to an exceptional enhancement in catalytic activity and excellent stability. This work not only sheds light on the fundamental mechanisms involved in the Co(OH)2/VN heterostructure interaction but also presents a promising strategy for designing highly efficient OER electrocatalysts. © 2023 Hydrogen Energy Publications LLC

KW - Co(OH)2

KW - Heterostructure

KW - In situ Raman

KW - Oxygen evolution reaction

KW - VN

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DO - 10.1016/j.ijhydene.2023.12.144

M3 - RGC 21 - Publication in refereed journal

SN - 0360-3199

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EP - 247

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

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