Mixed-dimensional heterostructures of hydrophobic/hydrophilic graphene foam for tunable hydrogen evolution reaction

被引：33

作者：

Aslam, Sehrish ^{[1
]}

Sagar, Rizwan Ur Rehman ^{[2
]}

Kumar, Hitanshu ^{[3
]}

Zhang, Gaowei ^{[1
]}

Nosheen, Farhat ^{[4
]}

Namvari, Mina ^{[5
]}

Mahmood, Nasir ^{[6
]}

Zhang, Min ^{[2
]}

Qiu, Yejun ^{[1
]}

机构：

[1] Harbin Inst Technol, Shenzhen Engn Lab Flexible Transparent Conduct Fi, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China

[2] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China

[3] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518055, Peoples R China

[4] Univ Educ, Div Sci & Technol, Dept Chem, Lahore, Pakistan

[5] Palacky Univ Olomouc, Dept Phys Chem, Reg Ctr Adv Technol & Mat, Fac Sci, 17 Listopadu 1192-12, Olomouc 77146, Czech Republic

[6] RMIT Univ, Sch Engn, 124 La Trobe St, Melbourne, Vic 3001, Australia

来源：

CHEMOSPHERE | 2020年 / 245卷

关键词：

Graphene oxide; Graphene foam; Hydrogen evolution reaction; Hydrophobic/hydrophilic interface; Heterostructure; ELECTRODE; MECHANISM; FILMS;

D O I：

10.1016/j.chemosphere.2019.125607

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The synergetic effect of hydrophilic and hydrophobic carbon can be used to obtain tunable hydrogen evolution reaction (HER) at the interface. Herein, graphene oxide (GO-Hummers method) was coated on graphene foam (GF) synthesized via chemical vapor deposition to develop mixed-dimensional heterostructure for the observation of HER. The porosity of GF not only provides an optimized diffusion co-efficient for better mass transport but also modified surface chemistry (GF/GO-hydrophobic/hydrophilic interface), which results in an onset potential 50 mV and overpotential of 450 mV to achieve the current density 10 mA/cm(2). The surface analysis shows that inherent functional groups at the surface played a key role in tuning the activity of hybrid, providing a pathway to introduce non-corrosive electrodes for water splitting. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：8

共 31 条

[1] Nanostructured 3D-porous graphene hydrogel based Ti/Sb-SnO2-Gr electrode with enhanced electrocatalytic activity [J].