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用于电化学应用的高比表面积微介孔石墨烯。

High surface area micro-mesoporous graphene for electrochemical applications.

作者信息

Kamedulski Piotr, Skorupska Malgorzata, Binkowski Pawel, Arendarska Weronika, Ilnicka Anna, Lukaszewicz Jerzy P

机构信息

Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100, Torun, Poland.

Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wilenska 4, 87-100, Torun, Poland.

出版信息

Sci Rep. 2021 Nov 11;11(1):22054. doi: 10.1038/s41598-021-01154-0.

DOI:10.1038/s41598-021-01154-0
PMID:34764324
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8585976/
Abstract

The manuscript presents results on the influence of external pressure on graphene exfoliation and subsequent 3D structuring by means of liquid-phase exfoliation. In contrast to known and applied exfoliation methods, the current study exploits the enhancement of splitting forces caused by the application of high pressure. The manufacturing pathway allowed to increase the surface area from 750 m/g (nanoplatelets) to ca. 1100 m/g (after 3D structuring). Electrochemical studies revealed that the 3D graphene materials were active in the oxygen reduction reaction (ORR). The outstanding ORR activity of 3D structured graphene materials should not be ascribed to heteroatom catalytic centers since such heteroatoms were successively removed upon increasing the carbonization temperature. XPS data showed that the presence of transition metals and nitrogen (usually regarded as catalytic centers) in G-materials was marginal. The results highlight the importance of structural factors of electrodes in the case of graphene-based materials for Zn-air batteries and ORR.

摘要

该手稿展示了外部压力对石墨烯剥离以及随后通过液相剥离进行3D结构化的影响的研究结果。与已知的和应用的剥离方法不同，当前研究利用了高压施加所引起的分裂力增强。制造途径使得表面积从750 m/g（纳米片）增加到约1100 m/g（3D结构化后）。电化学研究表明，3D石墨烯材料在氧还原反应（ORR）中具有活性。3D结构化石墨烯材料出色的ORR活性不应归因于杂原子催化中心，因为随着碳化温度的升高，此类杂原子会相继被去除。XPS数据表明，G材料中过渡金属和氮（通常被视为催化中心）的存在微乎其微。这些结果突出了在基于石墨烯的锌空气电池和ORR材料中电极结构因素的重要性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/24dfdd735402/41598_2021_1154_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/897269658a2d/41598_2021_1154_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/e15dec2ebc57/41598_2021_1154_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/3be43864b7f3/41598_2021_1154_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/8604946986a9/41598_2021_1154_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/86a9ab2bdbc5/41598_2021_1154_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/929afde382b9/41598_2021_1154_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/d86fbfc2742a/41598_2021_1154_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/ef86eecd4dc9/41598_2021_1154_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/24dfdd735402/41598_2021_1154_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/897269658a2d/41598_2021_1154_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/e15dec2ebc57/41598_2021_1154_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/3be43864b7f3/41598_2021_1154_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/8604946986a9/41598_2021_1154_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/86a9ab2bdbc5/41598_2021_1154_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/929afde382b9/41598_2021_1154_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/d86fbfc2742a/41598_2021_1154_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/ef86eecd4dc9/41598_2021_1154_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d7a/8585976/24dfdd735402/41598_2021_1154_Fig9_HTML.jpg

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