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

S. Aslam, RUR. Sagar, H. Kumar, G. Zhang, F. Nosheen, M. Namvari, N. Mahmood, M. Zhang, Y. Qiu,

. 2020 ; 245 (-) : 125607. [pub] 20191216

Jazyk angličtina Země Velká Británie

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc20023080

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 coefficient 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/cm2. 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.

Citace poskytuje Crossref.org

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$a The synergetic effect of hydrophilic and hydrophobic carbon can be used to obtain tunable hydrogen evolution reaction (HER) at the interface. Herein, graphene oxide (GO-Hummers method) was coated on graphene foam (GF) synthesized via chemical vapor deposition to develop mixed-dimensional heterostructure for the observation of HER. The porosity of GF not only provides an optimized diffusion coefficient for better mass transport but also modified surface chemistry (GF/GO-hydrophobic/hydrophilic interface), which results in an onset potential 50 mV and overpotential of 450 mV to achieve the current density 10 mA/cm2. The surface analysis shows that inherent functional groups at the surface played a key role in tuning the activity of hybrid, providing a pathway to introduce non-corrosive electrodes for water splitting.
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$a Sagar, Rizwan Ur Rehman $u Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China. Electronic address: rizwan.ts@sz.tsinghua.edu.cn.
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$a Kumar, Hitanshu $u College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, China.
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$a Zhang, Gaowei $u Shenzhen Engineering Lab of Flexible Transparent Conductive Films, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, 518055, China.
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$a Nosheen, Farhat $u Department of Chemistry, Division of Science & Technology, University of Education, Lahore, Pakistan.
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$a Namvari, Mina $u Regional Centre for Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University Olomouc, 17. listopadu 1192/12, 771 46, Olomouc, Czech Republic.
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$a Mahmood, Nasir $u School of Engineering, RMIT University, 124 La Trobe Street, 3001, Melbourne, Victoria, Australia. Electronic address: nasir.mahmood@rmit.edu.au.
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$a Zhang, Min $u Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China. Electronic address: zhang.min@sz.tsinghua.edu.cn.
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$a Qiu, Yejun $u Shenzhen Engineering Lab of Flexible Transparent Conductive Films, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, 518055, China. Electronic address: yejunqiu@hit.edu.cn.
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