2D nanosheet molybdenum disulphide (MoS2) modified electrodes explored towards the hydrogen evolution reaction

Hdl Handle:
http://hdl.handle.net/10034/581101
Title:
2D nanosheet molybdenum disulphide (MoS2) modified electrodes explored towards the hydrogen evolution reaction
Authors:
Rowley-Neale, Samuel J.; Brownson, Dale A. C.; Smith, Graham C.; Satwell, David A. G.; Kelly, Peter J.; Banks, Craig E.
Abstract:
We explore the use of two-dimensional (2D) MoS2 nanosheets as an electro-catalyst for the Hydrogen Evolution Reaction (HER). Using four commonly employed commercially available carbon based electrode support materials, namely edge plane pyrolytic graphite (EPPG), glassy carbon (GC), boron-doped diamond (BDD) and screen-printed graphite electrodes (SPE), we critically evaluate the reported electro-catalytic performance of unmodified and MoS2 modified electrodes towards the HER. Surprisingly, current literature focuses almost exclusively on the use of GC as an underling support electrode upon which HER materials are immobilised. 2D MoS2 nanosheet modified electrodes are found to exhibit a coverage dependant electrocatalytic effect towards the HER. Modification of the supporting electrode surface with an optimal mass of 2D MoS2 nanosheets results in a lowering of the HER onset potential by ca. 0.33, 0.57, 0.29 and 0.31 V at EPPG, GC, SPE and BDD electrodes compared to their unmodified counterparts respectively. The lowering of the HER onset potential is associated with each supporting electrodes individual electron transfer kinetics/properties. The effect of MoS2 coverage is also explored. We reveal that its ability to catalyse the HER is dependent on the mass deposited until a critical mass of 2D MoS2 nanosheets is achieved, after which its electrocatalytic benefits and/or surface stability curtail. The active surface site density and turn over frequency for the 2D MoS2 nanosheets is determined, characterised and found to be dependent on both the coverage of 2D MoS2 nanosheets and the underlying/supporting substrate. This work is essential for those designing, fabricating and consequently electrochemically testing 2D nanosheet materials for the HER.
Affiliation:
Faculty of Science and Engineering, Manchester Metropolitain University, Manchester M 5GD, UK (Rowley-Neale, Brownson, Satwell, Kelly & Banks); Department of Natural Sciences, University of Chester, Thornton Science Park, Chester CH2 4NU (Smith)
Citation:
Rowley-Neale, S. J., Brownson, D. A. C., Smith, G. C., Sawtell, D. A. G., Kelly, P. J., & Banks, C. E. (2015). 2D nanosheet molybdenum disulphide (MoS2) modified electrodes explored towards the hydrogen evolution reaction. Nanoscale, 7(43), 18152-18168. doi: 10.1039/C5NR05164A
Publisher:
Royal Society of Chemistry
Journal:
Nanoscale
Publication Date:
6-Oct-2015
URI:
http://hdl.handle.net/10034/581101
DOI:
10.1039/c5nr05164a
Additional Links:
http://pubs.rsc.org/en/content/articlelanding/2015/nr/c5nr05164a
Type:
Article
Language:
en
Appears in Collections:
Natural Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorRowley-Neale, Samuel J.en
dc.contributor.authorBrownson, Dale A. C.en
dc.contributor.authorSmith, Graham C.en
dc.contributor.authorSatwell, David A. G.en
dc.contributor.authorKelly, Peter J.en
dc.contributor.authorBanks, Craig E.en
dc.date.accessioned2015-10-26T10:47:47Zen
dc.date.available2015-10-26T10:47:47Zen
dc.date.issued2015-10-06en
dc.identifier.citationRowley-Neale, S. J., Brownson, D. A. C., Smith, G. C., Sawtell, D. A. G., Kelly, P. J., & Banks, C. E. (2015). 2D nanosheet molybdenum disulphide (MoS2) modified electrodes explored towards the hydrogen evolution reaction. Nanoscale, 7(43), 18152-18168. doi: 10.1039/C5NR05164Aen
dc.identifier.doi10.1039/c5nr05164aen
dc.identifier.urihttp://hdl.handle.net/10034/581101en
dc.description.abstractWe explore the use of two-dimensional (2D) MoS2 nanosheets as an electro-catalyst for the Hydrogen Evolution Reaction (HER). Using four commonly employed commercially available carbon based electrode support materials, namely edge plane pyrolytic graphite (EPPG), glassy carbon (GC), boron-doped diamond (BDD) and screen-printed graphite electrodes (SPE), we critically evaluate the reported electro-catalytic performance of unmodified and MoS2 modified electrodes towards the HER. Surprisingly, current literature focuses almost exclusively on the use of GC as an underling support electrode upon which HER materials are immobilised. 2D MoS2 nanosheet modified electrodes are found to exhibit a coverage dependant electrocatalytic effect towards the HER. Modification of the supporting electrode surface with an optimal mass of 2D MoS2 nanosheets results in a lowering of the HER onset potential by ca. 0.33, 0.57, 0.29 and 0.31 V at EPPG, GC, SPE and BDD electrodes compared to their unmodified counterparts respectively. The lowering of the HER onset potential is associated with each supporting electrodes individual electron transfer kinetics/properties. The effect of MoS2 coverage is also explored. We reveal that its ability to catalyse the HER is dependent on the mass deposited until a critical mass of 2D MoS2 nanosheets is achieved, after which its electrocatalytic benefits and/or surface stability curtail. The active surface site density and turn over frequency for the 2D MoS2 nanosheets is determined, characterised and found to be dependent on both the coverage of 2D MoS2 nanosheets and the underlying/supporting substrate. This work is essential for those designing, fabricating and consequently electrochemically testing 2D nanosheet materials for the HER.en
dc.language.isoenen
dc.publisherRoyal Society of Chemistryen
dc.relation.urlhttp://pubs.rsc.org/en/content/articlelanding/2015/nr/c5nr05164aen
dc.subjectNanosheeten
dc.subjectmolybdenum disulphideen
dc.subjecthydrogen evolution reactionen
dc.subjectelectrocatalysten
dc.title2D nanosheet molybdenum disulphide (MoS2) modified electrodes explored towards the hydrogen evolution reactionen
dc.typeArticleen
dc.contributor.departmentFaculty of Science and Engineering, Manchester Metropolitain University, Manchester M 5GD, UK (Rowley-Neale, Brownson, Satwell, Kelly & Banks); Department of Natural Sciences, University of Chester, Thornton Science Park, Chester CH2 4NU (Smith)en
dc.identifier.journalNanoscaleen
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