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

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

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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.

Strain engineeringStabilityElectrocatalystsTwo-dimensional materialWater splitting

Binyu Zhang、Weiwei Li、Kexi Zhang、Jingtao Gao、Yang Cao、Yuqian Cheng、Delun Chen、Qiang Wu、Lei Ding、Jinchun Tu、Xiaolin Zhang、Chenghua Sun

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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

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

ARC Centre for Electromaterials Science,School of Chemistry,Monash University,Clayton,Victoria 3800,Australia

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Hainan Province Science and Technology Special FundHainan Province Science and Technology Special FundNational Natural Science Foundation of ChinaHainan Provincial Natural Science Foundation of ChinaYouth Foundation of Hainan Province

ZDYF2021SHFZ068ZDKJ202102952262014823CXTD376221QN0898

2024

10.1016/j.jmst.2023.08.041

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)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.177(10)
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