Scalable bottom-up synthesis of Co-Ni–doped graphene

IF 11.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Science Advances Pub Date : 2024-11-08 DOI:10.1126/sciadv.ado8956
Valeria Chesnyak, Daniele Perilli, Mirco Panighel, Alessandro Namar, Alexander Markevich, Thuy An Bui, Aldo Ugolotti, Ayesha Farooq, Matus Stredansky, Clara Kofler, Cinzia Cepek, Giovanni Comelli, Jani Kotakoski, Cristiana Di Valentin, Cristina Africh
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Abstract

Introducing heteroatoms into graphene is a powerful strategy to modulate its catalytic, electronic, and magnetic properties. At variance with the cases of nitrogen (N)– and boron (B)–doped graphene, a scalable method for incorporating transition metal atoms in the carbon (C) mesh is currently lacking, limiting the applicative interest of model system studies. This work presents a during-growth synthesis enabling the incorporation of cobalt (Co) alongside nickel (Ni) atoms in graphene on a Ni(111) substrate. Single atoms are covalently stabilized within graphene double vacancies, with a Co load ranging from 0.07 to 0.22% relative to C atoms, controllable by synthesis parameters. Structural characterization involves variable-temperature scanning tunneling microscopy and ab initio calculations. The Co- and Ni-codoped layer is transferred onto a transmission electron microscopy grid, confirming stability through scanning transmission electron microscopy and electron energy loss spectroscopy. This method holds promise for applications in spintronics, gas sensing, electrochemistry and catalysis, and potential extension to graphene incorporation of similar metals.
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可扩展的自下而上掺杂 Co-Ni- 的石墨烯合成。
在石墨烯中引入杂原子是调节其催化、电子和磁性能的有力策略。与掺氮(N)和掺硼(B)石墨烯的情况不同,目前还缺乏在碳(C)网格中加入过渡金属原子的可扩展方法,这限制了模型系统研究的应用兴趣。本研究提出了一种生长过程中的合成方法,可在 Ni(111)基底的石墨烯中加入钴(Co)原子和镍(Ni)原子。单原子以共价方式稳定在石墨烯双空位中,相对于 C 原子,Co 的负载量在 0.07% 到 0.22% 之间,可通过合成参数进行控制。结构表征包括变温扫描隧道显微镜和 ab initio 计算。钴和镍掺杂层被转移到透射电子显微镜网格上,通过扫描透射电子显微镜和电子能量损失光谱确认其稳定性。这种方法有望应用于自旋电子学、气体传感、电化学和催化,并有可能扩展到石墨烯与类似金属的结合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Science Advances
Science Advances 综合性期刊-综合性期刊
CiteScore
21.40
自引率
1.50%
发文量
1937
审稿时长
29 weeks
期刊介绍: Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.
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