Non-covalent interaction of atomically dispersed dual-site catalysts featuring Co and Ni nascent pair sites for efficient electrocatalytic overall water splitting

Imran Khan ¹Yaogang Chen ²Zhiyang Li ³Wenjie Liu ³Salman Khan ⁴Sami Ullah ⁵Linlin Liu ⁶Amir Zada ⁷Sharafat Ali ⁸Shabana Shaheen ⁴Lei Yang³

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作者信息

1. State Key Laboratory of Urban Water Resource and Environment,Shenzhen Key Laboratory of Organic Pollution Prevention and Control,School of Civil and Environmental Engineering,Harbin Institute of Technology Shenzhen,Shenzhen 518055,China;School of Physics and Electronics,Central South University,Changsha 410083,China
2. CNAS Accredited Test Center,Guangdong Engineering Technology Research Center of Air Purification,Healthlead Co.,Ltd.,Shenzhen 518055,China
3. State Key Laboratory of Urban Water Resource and Environment,Shenzhen Key Laboratory of Organic Pollution Prevention and Control,School of Civil and Environmental Engineering,Harbin Institute of Technology Shenzhen,Shenzhen 518055,China
4. Key laboratory of Functional Inorganic Material Chemistry,Ministry of Education of the People's Republic of China,Heilongjiang University,Harbin 150080,China
5. K.A.CARE Energy Research & Innovation Center(ERIC),King Fahd University of Petroleum & Minerals(KFUPM),Dhahran 31261,Saudi Arabia
6. School of Physics and Electronics,Central South University,Changsha 410083,China
7. Department of Chemistry,Abdul Wali Khan University,Mardan,Khyber Pakhtunkhwa 23200,Pakistan
8. School of Physics,University of Electronic Science and Technology of China,Chengdu 610054,China
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Abstract

The scarcity of highly effective and economical catalysts is a major impediment to the widespread adop-tion of electrochemical water splitting for the generation of hydrogen.MoS2,a low-cost candidate,suffers from inefficient catalytic activity.Nonetheless,a captivating strategy has emerged,which involves the en-gineering of heteroatom doping to enhance electrochemical proficiency.This investigation demonstrates a successful implementation of the strategy by combining ultrathin MoS2 nanosheets with Co and Ni dual single multi-atoms(DSMAs)grown directly on 2D N-doped carbon nanosheets(CoNi-MoS2/NCNs)for the purpose of improving hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).With the aid of a dual-atom doped bifunctional electrocatalyst,effective water splitting has been achieved across a broad pH range in electrolytes.The double doping of Co and Ni strengthens their interactions,thereby altering the electromagnetic composition of the host MoS2 and ultimately leading to improved electrocat-alytic activity.Additionally,the synergistic effect between NCNs and MoS2 nanosheets provided efficient electron transport channels for ions and an ample surface area with open voids for ion diffusion.Con-sequently,the CoNi-MoS2/NCNs catalysts demonstrated exceptional stability and activity,producing low degree overpotentials of 180.5,124.9,and 196.4 mV for HER and 200,203,and 207 mV for OER in neu-tral,alkaline,and acidic mediums,respectively,while also exhibiting outstanding overall water-splitting performance,durability,and stability when used as an electrolyzer at universal pH.

Key words

Multifunctional catalyst/Water splitting/Functionalized carbon nanosheets/Interface engineering/pH-universal electrocatalysis

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基金项目

National Natural Science Foundation of China(52170157)

National Natural Science Foundation of China(52111530188)

Natural Science Foundation of Shenzhen(JCYJ20220531095408020)

Major Program of Jiangxi Provincial Department of Science and Technology(2022KSG01004)

University-Industry Collaborative Education Program(220902016150653)

Natural Science Foundation of Shenzhen(GXWD20201230155427003-20200802110025006)

Startup Grant Harbin Institute of Technology(Shenzhen)(IA45001007)

Startup Grant Harbin Institute of Technology(Shenzhen)(HA11409066)

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)

CSTPCD

影响因子：0.657

ISSN：1005-0302

参考文献量74

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