Defect-Free Single-Layer Graphene by 10 s Microwave Solid Exfoliation and Its Application for Catalytic Water Splitting

被引：21

作者：

Bayazit, Mustafa K. ^{[1
]}

Xiong, Lunqiao ^{[1
]}

Jiang, Chaoran ^{[1
]}

Moniz, Savio J. A. ^{[1
]}

White, Edward ^{[2
]}

Shaffer, Milo S. P. ^{[2
]}

Tang, Junwang ^{[1
]}

机构：

[1] UCL, Dept Chem Engn, London WC1E 7JE, England

[2] Imperial Coll London, Dept Chem, London SW7 2AZ, England

来源：

ACS APPLIED MATERIALS & INTERFACES | 2021年 / 13卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

defect-free single-layer graphene; fast production; special mode microwave-intensified process; conductivity; oxygen evolution reaction; water splitting; RAMAN-SPECTROSCOPY; INTERCALATION COMPOUNDS; GRAPHITE; OXYGEN; TRANSPARENT; EFFICIENCY; FILMS;

D O I：

10.1021/acsami.1c03906

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mass production of defect-free single-layer graphene flakes (SLGFs) by a cost-effective approach is still very challenging. Here, we report such single-layer graphene flakes (SLGFs) (>90%) prepared by a nondestructive, energy-efficient, and easy up-scalable physical approach. These high-quality graphene flakes are attributed to a novel 10 s microwave-modulated solid-state approach, which not only fast exfoliates graphite in air but also self-heals the surface of graphite to remove the impurities. The fabricated high-quality graphene films (similar to 200 nm) exhibit a sheet resistance of similar to 280 Omega/sq without any chemical or physical post-treatment. Furthermore, graphene-incorporated Ni-Fe electrodes represent a remarkable similar to 140 mA/cm(2) current for the catalytic water oxidation reaction compared with the pristine Ni-Fe electrode (similar to 10 mA/cm(2)) and a 120 mV cathodic shift in onset potential under identical experimental conditions, together with a faradic efficiency of >90% for an ideal ratio of H-2 and O-2 production from water. All these excellent performances are attributed to extremely high conductivity of the defect-free graphene flakes.

引用

页码：28600 / 28609

页数：10

共 47 条

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