2D Molybdenum Disulphide (2D-MoS2) Modified Electrodes Explored Towards the Oxygen Reduction Reaction

Hdl Handle:
http://hdl.handle.net/10034/620342
Title:
2D Molybdenum Disulphide (2D-MoS2) Modified Electrodes Explored Towards the Oxygen Reduction Reaction
Authors:
Rowley-Neale, Samuel J.; Fearn, Jamie; Brownson, Dale A. C.; Smith, Graham C.; Ji, Xiaobo; Banks, Craig E.
Abstract:
Two-dimensional molybdenum disulphide nanosheets (2D-MoS2)have proven to be an effective lectro- catalyst, with particular attention being focused on their use towards increasing the efficiency of the reac-tions associated with hydrogen fuel cells. Whilst the majority of research has focused on the Hydrogen Evolution Reaction (HER), herein we explore the use of 2D-MoS2 as a potential electrocatalyst for the much less researched Oxygen Reduction Reaction (ORR). We stray from literature conventions and perform experiments in 0.1 M H2SO4 acidic electrolyte for the first time, evaluating the electrochemical performance of the ORR with 2D-MoS2 electrically wired/immobilised upon several carbon based elec-trodes (namely; Boron Doped Diamond (BDD), Edge Plane Pyrolytic Graphite (EPPG), Glassy Carbon (GC) and Screen-Printed Electrodes (SPE)) whilst exploring a range of 2D-MoS2 coverages/masses. Conse-quently, the findings of this study are highly applicable to real world fuel cell applications. We show that significant improvements in ORR activity can be achieved through the careful selection of the under-lying/supporting carbon materials that electrically wire the 2D-MoS2and utilisation of an optimal mass of 2D-MoS2. The ORR onset is observed to be reduced to ca.+0.10 V for EPPG, GC and SPEs at 2D-MoS2 (1524 ng cm−2 modification), which is far closer to Pt at +0.46 V compared to bare/unmodified EPPG, GC and SPE counterparts. This report is the first to demonstrate such beneficial electrochemical responses in acidic conditions using a 2D-MoS2 based electrocatalyst material on a carbon-based substrate (SPEs in this case). Investigation of the beneficial reaction mechanism reveals the ORR to occur via a 4 electron process in specific conditions; elsewhere a 2 electron process is observed. This work offers valuable insights for those wishing to design, fabricate and/or electrochemically test 2D-nanosheet materials towards the ORR
Affiliation:
Manchester Metropolitan University (Rowley-Neale, Fearn, Brownson, Banks); University of Chester (Smith); Central South University Changsha (Ji)
Citation:
Rowley-Neale, S. J. (2016). 2D Molybdenum Disulphide (2D-MoS2) Modified Electrodes Explored Towards the Oxygen Reduction Reaction. Nanoscale, 8, 14767-14777. DOI: 10.1039/C6NR04073J
Publisher:
Royal Society of Chemistry
Journal:
Nanoscale
Publication Date:
11-Jul-2016
URI:
http://hdl.handle.net/10034/620342
DOI:
10.1039/C6NR04073J
Additional Links:
http://pubs.rsc.org/en/content/articlepdf/2016/nr/c6nr04073j
Type:
Article
Language:
en
EISSN:
2040-3372
Appears in Collections:
Natural Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorRowley-Neale, Samuel J.en
dc.contributor.authorFearn, Jamieen
dc.contributor.authorBrownson, Dale A. C.en
dc.contributor.authorSmith, Graham C.en
dc.contributor.authorJi, Xiaoboen
dc.contributor.authorBanks, Craig E.en
dc.date.accessioned2017-02-01T12:27:16Z-
dc.date.available2017-02-01T12:27:16Z-
dc.date.issued2016-07-11-
dc.identifier.citationRowley-Neale, S. J. (2016). 2D Molybdenum Disulphide (2D-MoS2) Modified Electrodes Explored Towards the Oxygen Reduction Reaction. Nanoscale, 8, 14767-14777. DOI: 10.1039/C6NR04073Jen
dc.identifier.doi10.1039/C6NR04073J-
dc.identifier.urihttp://hdl.handle.net/10034/620342-
dc.description.abstractTwo-dimensional molybdenum disulphide nanosheets (2D-MoS2)have proven to be an effective lectro- catalyst, with particular attention being focused on their use towards increasing the efficiency of the reac-tions associated with hydrogen fuel cells. Whilst the majority of research has focused on the Hydrogen Evolution Reaction (HER), herein we explore the use of 2D-MoS2 as a potential electrocatalyst for the much less researched Oxygen Reduction Reaction (ORR). We stray from literature conventions and perform experiments in 0.1 M H2SO4 acidic electrolyte for the first time, evaluating the electrochemical performance of the ORR with 2D-MoS2 electrically wired/immobilised upon several carbon based elec-trodes (namely; Boron Doped Diamond (BDD), Edge Plane Pyrolytic Graphite (EPPG), Glassy Carbon (GC) and Screen-Printed Electrodes (SPE)) whilst exploring a range of 2D-MoS2 coverages/masses. Conse-quently, the findings of this study are highly applicable to real world fuel cell applications. We show that significant improvements in ORR activity can be achieved through the careful selection of the under-lying/supporting carbon materials that electrically wire the 2D-MoS2and utilisation of an optimal mass of 2D-MoS2. The ORR onset is observed to be reduced to ca.+0.10 V for EPPG, GC and SPEs at 2D-MoS2 (1524 ng cm−2 modification), which is far closer to Pt at +0.46 V compared to bare/unmodified EPPG, GC and SPE counterparts. This report is the first to demonstrate such beneficial electrochemical responses in acidic conditions using a 2D-MoS2 based electrocatalyst material on a carbon-based substrate (SPEs in this case). Investigation of the beneficial reaction mechanism reveals the ORR to occur via a 4 electron process in specific conditions; elsewhere a 2 electron process is observed. This work offers valuable insights for those wishing to design, fabricate and/or electrochemically test 2D-nanosheet materials towards the ORRen
dc.language.isoenen
dc.publisherRoyal Society of Chemistryen
dc.relation.urlhttp://pubs.rsc.org/en/content/articlepdf/2016/nr/c6nr04073jen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subject2D molybdenum disulfideen
dc.subjectORRen
dc.title2D Molybdenum Disulphide (2D-MoS2) Modified Electrodes Explored Towards the Oxygen Reduction Reactionen
dc.typeArticleen
dc.identifier.eissn2040-3372-
dc.contributor.departmentManchester Metropolitan University (Rowley-Neale, Fearn, Brownson, Banks); University of Chester (Smith); Central South University Changsha (Ji)en
dc.identifier.journalNanoscaleen
dc.date.accepted2016-07-08-
or.grant.openaccessYesen
rioxxterms.funderUnfundeden
rioxxterms.identifier.projectUnfundeden
rioxxterms.versionAMen
rioxxterms.licenseref.startdate2017-07-11-
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