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Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters

Daniel Escalera-López, Yubiao Niu, Jinlong Yin, Kevin Cooke, Neil V. Rees, Richard Palmer Orcid Logo

ACS Catalysis, Volume: 6, Issue: 9, Pages: 6008 - 6017

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1021/acscatal.6b01274

Abstract

This report focuses on a novel strategy for the preparation of transition metal–MoS2 hybrid nanoclusters based on a one-step, dual-target magnetron sputtering, and gas condensation process demonstrated for Ni-MoS2. Aberration-corrected STEM images coupled with EDX analysis confirms the presence of N...

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Published in: ACS Catalysis
ISSN: 2155-5435 2155-5435
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa49229
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spelling 2021-01-07T14:04:07.9517600 v2 49229 2019-03-18 Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2019-03-18 MECH This report focuses on a novel strategy for the preparation of transition metal–MoS2 hybrid nanoclusters based on a one-step, dual-target magnetron sputtering, and gas condensation process demonstrated for Ni-MoS2. Aberration-corrected STEM images coupled with EDX analysis confirms the presence of Ni and MoS2 in the hybrid nanoclusters (average diameter = 5.0 nm, Mo:S ratio = 1:1.8 ± 0.1). The Ni-MoS2 nanoclusters display a 100 mV shift in the hydrogen evolution reaction (HER) onset potential and an almost 3-fold increase in exchange current density compared with the undoped MoS2 nanoclusters, the latter effect in agreement with reported DFT calculations. This activity is only reached after air exposure of the Ni-MoS2 hybrid nanoclusters, suggested by XPS measurements to originate from a Ni dopant atoms oxidation state conversion from metallic to 2+ characteristic of the NiO species active to the HER. Anodic stripping voltammetry (ASV) experiments on the Ni-MoS2 hybrid nanoclusters confirm the presence of Ni-doped edge sites and reveal distinctive electrochemical features associated with both doped Mo-edge and doped S-edge sites which correlate with both their thermodynamic stability and relative abundance. Journal Article ACS Catalysis 6 9 6008 6017 2155-5435 2155-5435 doping; hydrogen evolution; magnetron sputtering deposition; molybdenum disulfide; nanoclusters; STEM 2 9 2016 2016-09-02 10.1021/acscatal.6b01274 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2021-01-07T14:04:07.9517600 2019-03-18T14:28:09.7730443 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Daniel Escalera-López 1 Yubiao Niu 2 Jinlong Yin 3 Kevin Cooke 4 Neil V. Rees 5 Richard Palmer 0000-0001-8728-8083 6 49229__17906__91250a5059284feb9cf7d1834ab951c6.pdf escaleralopez2016.pdf 2020-08-13T10:03:43.9588619 Output 5263441 application/pdf Version of Record true Distributed under the terms of a Creative Commons Attribution 4.0. (CC-BY) Licence. true eng http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html
title Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters
spellingShingle Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters
Richard Palmer
title_short Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters
title_full Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters
title_fullStr Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters
title_full_unstemmed Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters
title_sort Enhancement of the Hydrogen Evolution Reaction from Ni-MoS2 Hybrid Nanoclusters
author_id_str_mv 6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv 6ae369618efc7424d9774377536ea519_***_Richard Palmer
author Richard Palmer
author2 Daniel Escalera-López
Yubiao Niu
Jinlong Yin
Kevin Cooke
Neil V. Rees
Richard Palmer
format Journal article
container_title ACS Catalysis
container_volume 6
container_issue 9
container_start_page 6008
publishDate 2016
institution Swansea University
issn 2155-5435
2155-5435
doi_str_mv 10.1021/acscatal.6b01274
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 1
active_str 0
description This report focuses on a novel strategy for the preparation of transition metal–MoS2 hybrid nanoclusters based on a one-step, dual-target magnetron sputtering, and gas condensation process demonstrated for Ni-MoS2. Aberration-corrected STEM images coupled with EDX analysis confirms the presence of Ni and MoS2 in the hybrid nanoclusters (average diameter = 5.0 nm, Mo:S ratio = 1:1.8 ± 0.1). The Ni-MoS2 nanoclusters display a 100 mV shift in the hydrogen evolution reaction (HER) onset potential and an almost 3-fold increase in exchange current density compared with the undoped MoS2 nanoclusters, the latter effect in agreement with reported DFT calculations. This activity is only reached after air exposure of the Ni-MoS2 hybrid nanoclusters, suggested by XPS measurements to originate from a Ni dopant atoms oxidation state conversion from metallic to 2+ characteristic of the NiO species active to the HER. Anodic stripping voltammetry (ASV) experiments on the Ni-MoS2 hybrid nanoclusters confirm the presence of Ni-doped edge sites and reveal distinctive electrochemical features associated with both doped Mo-edge and doped S-edge sites which correlate with both their thermodynamic stability and relative abundance.
published_date 2016-09-02T04:00:03Z
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score 11.017797

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