THE NANO FOR ENERGY GROUP
  • Home
  • Our latest work
  • Publications
  • About us

Graphene decorated with metal nanoparticles: Hydrogen sorption and related artefacts

8/21/2017

0 Comments

 
Hydrogen sorption is studied on reduced graphene oxides decorated with Pd and Pt. However, the use of noble metals does not improve the hydrogen storage properties. This work is a collaboration with Prof. Alexandr V. Talyzin (Umeå, Sweden), and the results were published in the Microporous and Mesoporous Materials journal.

Alexey Klechikov, Jinhua Sun, Guangzhi Hu, Mingbo Zheng, Thomas Wågberg, Alexandr V.Talyzin.
Microporous and Mesoporous Materials, 250, 27-34 (2017)
Picture

Abstract

Hydrogen sorption by reduced graphene oxides (r-GO) is not found to increase after decoration with Pd and Pt nanoparticles. Treatments of metal decorated samples using annealing under hydrogen or air were tested as a method to create additional pores by effects of r-GO etching around nanoparticles. Increase of Specific Surface Area (SSA) was observed for some air annealed r-GO samples. However, the same treatments applied to activated r-GO samples with microporous nature and higher surface area result in breakup of structure and dramatic decrease of SSA. Our experiments have not revealed effects which could be attributed to spillover in hydrogen sorption on Pd or Pt decorated graphene. However, we report irreversible chemisorption of hydrogen for some samples which can be mistakenly assigned to spillover if the experiments are incomplete.
0 Comments

Your comment will be posted after it is approved.


Leave a Reply.

    Nano for Energy group

    Categories

    All
    Batteries
    C60
    DFT Calculations
    Electrocatalysis
    Graphene
    Hydrogen Evolution
    Mesoporous Carbon
    Nanofibers
    Nanoparticles
    Nanorods
    Nanotubes
    Oxygen Evolution
    Oxygen Reduction
    Palladium
    Photocatalysis

    Featured publications

    Picture
    Comprehensive Study of an Earth-Abundant Bifunctional 3D Electrode for Efficient Water Electrolysis in Alkaline Medium.
    ACS Appl. Mater. Interfaces, 2015, 7, 28148


    Picture
    C60/Collapsed Carbon Nanotube Hybrids - A Variant of Peapods.
    Nano Lett., 2015, 15 (2), pp 829–834

    Picture
    Fabrication of One-Dimensional Zigzag [6,6]-Phenyl-C61-Butyric Acid Methyl Ester Nanoribbons from Two-Dimensional Nanosheets.
    ACS Nano, 2015, 9, 10516

    Picture
    Hierarchical self-assembled structures based on nitrogen-doped carbon nanotubes as advanced negative electrodes for Li-ion batteries and 3D microbatteries.
    J. P. Sources, 2015, 279, 581

    Picture
    .Self-Assembly Synthesis of Decorated Nitrogen-Doped Carbon Nanotubes with ZnO Nanoparticles: Anchoring Mechanism and the Effects of Sulfur.
    J. Phys. Chem. C, 120, 27849 (2016)
    Picture
    Sn/Be Sequentially co-doped Hematite Photoanodes for Enhanced Photoelectrochemical Water Oxidation: Effect of Be2+ as co-dopant.
    Sci Rep. 2016; 6: 23183.
    Picture
    Atomistic understanding of the origin of high oxygen reduction electrocatalytic activity of cuboctahedral Pt3Co–Pt core–shell nanoparticles.
    Catal. Sci. Technol., 2016, 6, 1393-1401

    Picture
    Photocatalytic reduction of CO2 with H2O over modified TiO2 nanofibers: Understanding the reduction pathway.
    Nano Res. (2016) 9: 1956.

    RSS Feed

Contact Information

Prof. Thomas Wågberg
Department of Physics, Linnaeus väg 24
Umeå University, 901 87 Umeå SE
email:  thomas.wagberg@physics.umu.se
Site administrator: Eduardo Gracia (eduardo.gracia@umu.se)
Links
Publications
Our latest work
Group members
Umeå University
  • Home
  • Our latest work
  • Publications
  • About us