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Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment

Daniel Escalera-López, Yubiao Niu, Sung Jin Park, Mark Isaacs, Karen Wilson, Richard Palmer Orcid Logo, Neil V. Rees

Applied Catalysis B: Environmental, Volume: 235, Pages: 84 - 91

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1016/j.apcatb.2018.04.068

Abstract

Size-selected molybdenum sulfide (MoSx) nanoclusters obtained by magnetron sputtering and gas condensation on glassy carbon substrates are typically sulfur-deficient (x = 1.6 ± 0.1), which limits their crystallinity and electrocatalytic properties. Here we demonstrate that a sulfur-enriching method,...

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Published in: Applied Catalysis B: Environmental
ISSN: 09263373
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39634
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first_indexed 2018-04-30T13:54:35Z
last_indexed 2018-06-18T13:31:33Z
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spelling 2018-06-18T12:39:48.6379315 v2 39634 2018-04-30 Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2018-04-30 MECH Size-selected molybdenum sulfide (MoSx) nanoclusters obtained by magnetron sputtering and gas condensation on glassy carbon substrates are typically sulfur-deficient (x = 1.6 ± 0.1), which limits their crystallinity and electrocatalytic properties. Here we demonstrate that a sulfur-enriching method, comprising sulfur evaporation and cluster annealing under vacuum conditions, significantly enhances their activity towards the hydrogen evolution reaction (HER). The S-richness (x = 4.9 ± 0.1) and extended crystalline order obtained in the sulfur-treated MoSx nanoclusters lead to consistent 200 mV shifts to lower HER onset potentials, along with two-fold and more-than 30-fold increases in turnover frequency and exchange current density values respectively. The high mass activities (~111 mA mg-1 @ 400 mV) obtained at ultra-low loadings (~100 ng cm-2, 5 % surface coverage) are comparable to the best reported MoS2 catalysts in the literature. Journal Article Applied Catalysis B: Environmental 235 84 91 09263373 molybdenum disulfide; nanoclusters; sulfur-rich; hydrogen evolution; magnetron sputtering deposition 31 12 2018 2018-12-31 10.1016/j.apcatb.2018.04.068 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2018-06-18T12:39:48.6379315 2018-04-30T10:37:02.3013050 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Daniel Escalera-López 1 Yubiao Niu 2 Sung Jin Park 3 Mark Isaacs 4 Karen Wilson 5 Richard Palmer 0000-0001-8728-8083 6 Neil V. Rees 7 0039634-30042018103838.pdf escalera-lopez2018.pdf 2018-04-30T10:38:38.4000000 Output 11163789 application/pdf Accepted Manuscript true 2018-04-30T00:00:00.0000000 true eng
title Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment
spellingShingle Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment
Richard Palmer
title_short Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment
title_full Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment
title_fullStr Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment
title_full_unstemmed Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment
title_sort Hydrogen evolution enhancement of ultra-low loading, size-selected molybdenum sulfide nanoclusters by sulfur enrichment
author_id_str_mv 6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv 6ae369618efc7424d9774377536ea519_***_Richard Palmer
author Richard Palmer
author2 Daniel Escalera-López
Yubiao Niu
Sung Jin Park
Mark Isaacs
Karen Wilson
Richard Palmer
Neil V. Rees
format Journal article
container_title Applied Catalysis B: Environmental
container_volume 235
container_start_page 84
publishDate 2018
institution Swansea University
issn 09263373
doi_str_mv 10.1016/j.apcatb.2018.04.068
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 Size-selected molybdenum sulfide (MoSx) nanoclusters obtained by magnetron sputtering and gas condensation on glassy carbon substrates are typically sulfur-deficient (x = 1.6 ± 0.1), which limits their crystallinity and electrocatalytic properties. Here we demonstrate that a sulfur-enriching method, comprising sulfur evaporation and cluster annealing under vacuum conditions, significantly enhances their activity towards the hydrogen evolution reaction (HER). The S-richness (x = 4.9 ± 0.1) and extended crystalline order obtained in the sulfur-treated MoSx nanoclusters lead to consistent 200 mV shifts to lower HER onset potentials, along with two-fold and more-than 30-fold increases in turnover frequency and exchange current density values respectively. The high mass activities (~111 mA mg-1 @ 400 mV) obtained at ultra-low loadings (~100 ng cm-2, 5 % surface coverage) are comparable to the best reported MoS2 catalysts in the literature.
published_date 2018-12-31T03:50:22Z
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score 11.037603

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