Interface strain engineering of Ir clusters on ultrathin NiO nanosheets for electrochemical water splitting over 1800 hours

Binyu Zhang ¹Weiwei Li ¹Kexi Zhang ¹Jingtao Gao ¹Yang Cao ²Yuqian Cheng ¹Delun Chen ¹Qiang Wu ³Lei Ding ¹Jinchun Tu ¹Xiaolin Zhang ⁴Chenghua Sun⁵

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作者信息

1. State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China
2. State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China;Key Laboratory of Child Cognition & Behavior Development of Hainan Province,Qiongtai Normal University,Haikou 571127,China
3. Department of Clinical Laboratory of The Second Affiliated Hospital,School of Tropical Medicine and Laboratory Medicine,Key Laboratory of Emergency and Trauma of Ministry of Education,Hainan Medical University,Haikou 571199,China
4. Key Laboratory of Child Cognition & Behavior Development of Hainan Province,Qiongtai Normal University,Haikou 571127,China
5. ARC Centre for Electromaterials Science,School of Chemistry,Monash University,Clayton,Victoria 3800,Australia
折叠

Abstract

Strain engineering of two-dimensional(2D)material interfaces represents a powerful strategy for enhanc-ing the electrocatalytic activity of water splitting.However,maintaining catalytic stability under various harsh conditions by introducing interface strain remains a great challenge.The catalyst developed and evaluated herein comprised Ir clusters dispersed on 2D NiO nanosheets(NSs)derived from metal organic frameworks(lr@NiO/CBDc),which displays a high activity and stability under all pH conditions,and even a change of only 1％in the applied voltage is observed after continuous electrocatalytic operation for over 1800 h under alkaline conditions.Through combined experimental and computational studies,we found that the introduced interfacial strain contributes to the outstanding structural stability of the Ir@NiO/CBDC catalyst,arising from its increased Ir and Ni vacancy formation energies,and hence suppressing its leach-ing.Moreover,strain also enhances the kinetically sluggish electrocatalytic water splitting reaction by op-timizing its electronic structure and coordination environment.This work highlights the effects of strain on catalyst stability and provides new insights for designing widely applicable electrocatalysts.

Key words

Strain engineering/Stability/Electrocatalysts/Two-dimensional material/Water splitting

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基金项目

Hainan Province Science and Technology Special Fund(ZDYF2021SHFZ068)

Hainan Province Science and Technology Special Fund(ZDKJ2021029)

National Natural Science Foundation of China(52262014)

Hainan Provincial Natural Science Foundation of China(823CXTD376)

Youth Foundation of Hainan Province(221QN0898)

出版年

2024

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCD

影响因子：0.657

ISSN：1005-0302

参考文献量47

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