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Manganese deception on graphene and implications in catalysis

文献类型：期刊论文

;
作者Ye, RQ; Dong JC(董俊才); Dong, JC; Wang, LQ; Mendoza-Cruz, R; Li, YL; An, PF; Yacaman, MJ; Yakobson, BI; Chen, DL
刊名CARBON ; CARBON
出版日期2018 ; 2018
卷号132页码:623-631
关键词Metal-free catalyst Metal-free catalyst Oxygen reduction reaction Heteroatom-doped graphene Metal-free graphene Oxygen reduction reaction Heteroatom-doped graphene Metal-free graphene
ISSN号0008-6223 ; 0008-6223
DOI10.1016/j.carbon.2018.02.082 ; 10.1016/j.carbon.2018.02.082
文献子类Article ; Article
英文摘要Heteroatom-doped metal-free graphene has been widely studied as the catalyst for the oxygen reduction reaction (ORR). Depending on the preparation method and the dopants, the ORR activity varies ranging from a two-electron to a four-electron pathway. The different literature reports are difficult to correlate due to the large variances. However, due to the potential metal contamination, the origin of the ORR activity from "metal-free" graphene remains confusing and inconclusive. Here we decipher the ORR catalytic activities of diverse architectures on graphene derived from reduced graphene oxide. High angle annular dark field scanning transmission electron microscopy, X-ray absorption near edge structure, extended X-ray absorption fine structure, and trace elemental analysis methods are employed. The mechanistic origin of ORR activity is associated with the trace manganese content and reaches its highest performance at an onset potential of 0.94 V when manganese exists as a mononuclear-centered structure within defective graphene. This study exposes the deceptive role of trace metal in formerly thought to be metal-free graphene materials. It also provides insight into the design of better-performing catalyst for ORR by underscoring the coordination chemistry possible for future single-atom catalyst materials. (c) 2018 Elsevier Ltd. All rights reserved.; Heteroatom-doped metal-free graphene has been widely studied as the catalyst for the oxygen reduction reaction (ORR). Depending on the preparation method and the dopants, the ORR activity varies ranging from a two-electron to a four-electron pathway. The different literature reports are difficult to correlate due to the large variances. However, due to the potential metal contamination, the origin of the ORR activity from "metal-free" graphene remains confusing and inconclusive. Here we decipher the ORR catalytic activities of diverse architectures on graphene derived from reduced graphene oxide. High angle annular dark field scanning transmission electron microscopy, X-ray absorption near edge structure, extended X-ray absorption fine structure, and trace elemental analysis methods are employed. The mechanistic origin of ORR activity is associated with the trace manganese content and reaches its highest performance at an onset potential of 0.94 V when manganese exists as a mononuclear-centered structure within defective graphene. This study exposes the deceptive role of trace metal in formerly thought to be metal-free graphene materials. It also provides insight into the design of better-performing catalyst for ORR by underscoring the coordination chemistry possible for future single-atom catalyst materials. (c) 2018 Elsevier Ltd. All rights reserved.
电子版国际标准刊号1873-3891 ; 1873-3891
WOS关键词OXYGEN REDUCTION REACTION ; OXYGEN REDUCTION REACTION ; NITROGEN-DOPED GRAPHENE ; METALLIC IMPURITIES ; ALKALINE MEDIA ; EFFICIENT ; OXIDE ; CARBON ; ELECTROCATALYST ; PERFORMANCE ; COMPLEXES ; NITROGEN-DOPED GRAPHENE ; METALLIC IMPURITIES ; ALKALINE MEDIA ; EFFICIENT ; OXIDE ; CARBON ; ELECTROCATALYST ; PERFORMANCE ; COMPLEXES
WOS研究方向Chemistry ; Chemistry ; Materials Science ; Materials Science
语种英语 ; 英语
WOS记录号WOS:000428233000067 ; WOS:000428233000067
源URL[http://ir.ihep.ac.cn/handle/311005/285770]  
专题高能物理研究所_多学科研究中心
通讯作者Chen DL(陈栋梁)
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714		 Ye, RQ,Dong JC,Dong, JC,et al. Manganese deception on graphene and implications in catalysis, Manganese deception on graphene and implications in catalysis[J]. CARBON, CARBON,2018, 2018,132, 132:623-631, 623-631.
APA Ye, RQ.,董俊才.,Dong, JC.,Wang, LQ.,Mendoza-Cruz, R.,...&陈栋梁.(2018).Manganese deception on graphene and implications in catalysis.CARBON,132,623-631.
MLA Ye, RQ,et al."Manganese deception on graphene and implications in catalysis".CARBON 132(2018):623-631.

入库方式： OAI收割

来源：高能物理研究所

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