Hydrogen uptake of reduced graphene oxide and graphene sheets decorated with Fe nanoclusters

被引：65

作者：

Hudson, M. Sterlin Leo ^{[1
]}

Raghubanshi, Himanshu ^{[2
]}

Awasthi, Seema ^{[3
]}

Sadhasivam, T. ^{[4
]}

Bhatnager, Ashish ^{[5
]}

Simizu, Satoru ^{[6
]}

Sankar, S. G. ^{[6
]}

Srivastava, O. N. ^{[5
]}

机构：

[1] Cent Univ Tamil Nadu, Dept Phys, Thiruvarur 610004, India

[2] Univ Allahabad, Nanotechnol Applicat Ctr, Allahabad 211002, Uttar Pradesh, India

[3] Hyderabad Cent Univ, Sch Phys, Hyderabad 500046, Andhra Pradesh, India

[4] Alagappa Univ, Dept Nanosci & Technol, Karaikkudi 630003, Tamil Nadu, India

[5] Banaras Hindu Univ, Dept Phys, MNRE Miss Mode Project Unit, Varanasi 221005, Uttar Pradesh, India

[6] Adv Mat Corp, Pittsburgh, PA 15220 USA

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 16期

关键词：

Helium isotherm; Nitrogen isotherm; Thermal reduction; Chemical reduction; Pore size distribution; Metal decoration on graphene; STORAGE CAPACITY; LARGE-SCALE; ADSORPTION; TEMPERATURE; MISCHMETAL; BATTERIES; BEHAVIOR; DEFECTS; ENERGY; FILMS;

D O I：

10.1016/j.ijhydene.2014.03.118

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Graphene oxide (GO) has been prepared by employing modified Staudenmaier's method through thermal exfoliation of graphite oxide. High pressure hydrogen sorption isotherms up to 50 bar of GO, reduced by thermal reduction (TR-GO), chemical reduction (CR-GO) and graphene sheets decorated with Fe nanoclusters (Fe-GS) have been investigated. Thermal reduction of GO at 623 K under high vacuum yields TR-GO. Chemical reduction of GO using hydrazine forms CR-GO. Fe-GS was synthesized through arc-discharge between the ends of two graphite rods with one rod carrying Fe nanoparticles. The surface areas of these graphene samples were determined from the nitrogen adsorption isotherm employing Brunauer, Emmett and Teller (BET) method. Kelvin's equation was used to determine the pore size distribution of all graphene based samples. Hydrogen pressure-composition isotherms (PCI) were determined at 300 K and at 77 K, between 0.1 and 50 bar. Further, in this paper, we present a comparative adsorption isotherm analysis of hydrogen and helium on TR-GO. This reveals that the volume of hydrogen and helium adsorbed by TR-GO is nearly equal. The similar uptake volume determined for both hydrogen and helium indicates the possibility of monolayer adsorption of hydrogen and also nearly similar binding energy between TR-GO and H2/He. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：8311 / 8320

页数：10

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