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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Graphene Supported MoS2 Structures with High Defect Density for an Efficient HER Electrocatalysts

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Author(s):
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Joyner, Jarin [1, 2, 3] ; Oliveira, Eliezer F. [2, 4, 5] ; Yamaguchi, Hisato [3] ; Kato, Keiko [2] ; Vinod, Soumya [2] ; Galvao, Douglas S. [4, 5] ; Salpekar, Devashish [2] ; Roy, Soumyabrata [2] ; Martinez, Ulises [3] ; Tiwary, Chandra S. [2, 6] ; Ozden, Sehmus [3, 7, 8] ; Ajayan, Pulickel M. [2]
Total Authors: 12
Affiliation:
[1] Rice Univ, Dept Chem, Houston, TX 77005 - USA
[2] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 - USA
[3] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 - USA
[4] State Univ Campinas UNICAMP, Appl Phys Dept, BR-13083970 Campinas, SP - Brazil
[5] State Univ Campinas UNICAMP, CCES, BR-13083970 Campinas, SP - Brazil
[6] Indian Inst Technol Kharagpur, Met & Mat Engn, Kharagpur 382355, W Bengal - India
[7] Princeton Univ, Princeton Inst Sci & Technol Mat Chem & Biol Engn, Princeton Ctr Complex Mat, Princeton, NJ 08540 - USA
[8] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08540 - USA
Total Affiliations: 8
Document type: Journal article
Source: ACS APPLIED MATERIALS & INTERFACES; v. 12, n. 11, p. 12629-12638, MAR 18 2020.
Web of Science Citations: 15
Abstract

The development of novel efficient and robust electrocatalysts with sufficient active sites is one of the key parameters for hydrogen evolution reactions (HER) catalysis, which plays a key role in hydrogen production for clean energy harvesting. Recently, two-dimensional (2D) materials, especially those based upon transition metal dichalcogenides such as molybdenum disulfide (MoS2), have gained attention for the catalysis of hydrogen production because of their exceptional properties. Innovative strategies have been developed to engineer these material systems for improvements in their catalytic activity. Toward this aim, the facile growth of MoS2 clusters by sulfurization of molybdenum dioxide (MoO2) particles supported on reduced graphene oxide (rGO) foams using the chemical vapor deposition (CVD) method is reported. This approach created various morphologies of MoS2 with large edges and defect densities on the basal plane of rGO supported MoS2 structures, which are considered as active sites for HER catalysis. In addition, MoS2 nanostructures on the surface of the porous rGO network show robust physical interactions, such as van der Waals and pi-pi interactions between MoS 2 and rGO. These features result in an improved process to yield a suitable HER catalyst. In order to gain a better understanding of the improvement of this MoS2-based HER catalyst, fully atomistic molecular dynamics (MD) simulations of different defect geometries were also performed. (AU)

FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
Grantee:Munir Salomao Skaf
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 16/18499-0 - Investigation on the structural, mechanical and functional properties of carbon-based nanostructures
Grantee:Eliezer Fernando de Oliveira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 19/07157-9 - DESIGNING NEW 3D STRUCTURES FROM ZEOLITE TEMPLATES FOR 3D PRINTING APPLICATIONS
Grantee:Eliezer Fernando de Oliveira
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor