Electrocatalytic Activity of Graphene Oxide/Metal Organic Framework Hybrid Composite on Hydrogen Evolution Reaction Properties

被引：16

作者：

Makhafola, Mogwasha D. ^{[1
]}

Ramohlola, Kabelo E. ^{[1
]}

Maponya, Thabiso C. ^{[1
]}

Somo, Thabang R. ^{[1
]}

Iwuoha, Emmanuel I. ^{[2
]}

Makgopa, Katlego ^{[3
]}

Hato, Mpitloane J. ^{[1
,4
]}

Molapo, Kerileng M. ^{[2
]}

Modibane, Kwena D. ^{[1
]}

机构：

[1] Univ Limpopo Turfloop, Sch Phys & Mineral Sci, Dept Chem, Nanotechnol Res Lab, ZA-0727 Sovenga, Polokwane, South Africa

[2] Univ Western Cape, Chem Dept, SensorLab, Cape Town, South Africa

[3] Tshwane Univ Technol, Fac Sci, Dept Chem, Acardia Campus, ZA-0001 Pretoria, South Africa

[4] Univ South Africa, Coll Agr & Environm Sci, Dept Environm Sci, Florida Sci Campus, ZA-1710 Johannesburg, South Africa

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2020年 / 15卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

electrocatalyst; graphene oxide; hydrogen evolution reaction; metal organic frameworks; Tafel analysis; HIGHLY EFFICIENT; OXIDE; NANOCOMPOSITE; NANOSHEETS; REDUCTION; MOS2;

D O I：

10.20964/2020.06.10

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work, the electrocatalytic activity of graphene oxide (GO) and its composite with metal organic framework (MOF) towards electrochemical hydrogen evolution reaction (HER) was studied. GO/MOF composite was synthesized by impregnation route and characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), simultaneous thermal analysis (STA), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) and high-resolution transmission electron microscopy/energy dispersive X-ray spectroscopy (HR-TEM/EDX). STA analysis showed an enhancement of the thermal stability of the GO/MOF composite compared to the pristine GO and MOF. SEM/EDS and HR-TEM/EDX confirmed the presence of octahedral structure of MOF in the GO sheet-like structure and elemental composition of the synthesized compounds. The performance of the proposed electrolytic system for electrochemical HER by Tafel parameters and turn over frequencies (TOFs) showed a huge increment of H-2 production in the composite through the Volmer reaction together with either of the two mechanisms in HER. This indicated that the addition of GO/MOF in the electrolytic system possessed better catalytic characteristics with enhanced TOFs, which may open a new way for hydrogen technology via HER enhancement.

引用

页码：4884 / 4899

页数：16

共 44 条

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