Mass-Producible 2D-MoS2‑Impregnated Screen-Printed Electrodes
dc.contributor.author | Rowley-Neale, Samuel J. | * |
dc.contributor.author | Smith, Graham C. | * |
dc.contributor.author | Banks, Craig E. | * |
dc.date.accessioned | 2018-05-21T14:01:08Z | |
dc.date.available | 2018-05-21T14:01:08Z | |
dc.date.issued | 2017-06-02 | |
dc.identifier.citation | Rowley-Neale, S. J., Smith, G. C., & Banks, C. E. (2017). Mass-Producible 2d-MoS2-impregnated screen-printed electrodes that demonstrate efficient electrocatalysis toward the oxygen reduction reaction. ACS Applied Materials and Interfaces, 9(27), 22539-22548. | en |
dc.identifier.doi | 10.1021/acsami.7b05104 | |
dc.identifier.uri | http://hdl.handle.net/10034/621139 | |
dc.description | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsami.7b05104 | en |
dc.description.abstract | Two-dimensional molybdenum disulfide (2D-MoS2) screen-printed electrodes (2D-MoS2-SPEs) have been designed, fabricated, and evaluated toward the electrochemical oxygen reduction reaction (ORR) within acidic aqueous media. A screen-printable ink has been developed that allows for the tailoring of the 2D-MoS2 content/mass used in the fabrication of the 2D-MoS2-SPEs, which critically affects the observed ORR performance. In comparison to the graphite SPEs (G-SPEs), the 2D-MoS2-SPEs are shown to exhibit an electrocatalytic behavior toward the ORR which is found, critically, to be reliant upon the percentage mass incorporation of 2D-MoS2 in the 2D-MoS2-SPEs; a greater percentage mass of 2D-MoS2 incorporated into the 2D-MoS2-SPEs results in a significantly less electronegative ORR onset potential and a greater signal output (current density). Using optimally fabricated 2D-MoS2-SPEs, an ORR onset and a peak current of approximately +0.16 V [vs saturated calomel electrode (SCE)] and −1.62 mA cm–2, respectively, are observed, which exceeds the −0.53 V (vs SCE) and −635 μA cm–2 performance of unmodified G-SPEs, indicating an electrocatalytic response toward the ORR utilizing the 2D-MoS2-SPEs. An investigation of the underlying electrochemical reaction mechanism of the ORR within acidic aqueous solutions reveals that the reaction proceeds via a direct four-electron process for all of the 2D-MoS2-SPE variants studied herein, where oxygen is electrochemically favorably reduced to water. The fabricated 2D-MoS2-SPEs are found to exhibit no degradation in the observed achievable current over the course of 1000 repeat scans. The production of such inks and the resultant mass-producible 2D-MoS2-SPEs mitigates the need to modify post hoc an electrode via the drop-casting technique that has been previously shown to result in a loss of achievable current over the course of 1000 repeat scans. The 2D-MoS2-SPEs designed, fabricated, and tested herein could have commercial viability as electrocatalytic fuel cell electrodes because of being economical as a result of their scales of economy and inherent tailorability. The technique utilized herein to produce the 2D-MoS2-SPEs could be adapted for the incorporation of different 2D nanomaterials, resulting in SPEs with the inherent advantages identified above. | |
dc.language.iso | en | en |
dc.publisher | American Chemical Society | en |
dc.relation.url | https://pubs.acs.org/doi/10.1021/acsami.7b05104 | en |
dc.relation.url | https://pubs.acs.org/journal/aamick | en |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | en |
dc.subject | electrochemistry | en |
dc.subject | hydrogen economy | en |
dc.subject | modified inks | en |
dc.subject | oxygen reduction reaction | en |
dc.subject | screen printed electrodes | en |
dc.subject | XPS | en |
dc.title | Mass-Producible 2D-MoS2‑Impregnated Screen-Printed Electrodes | en |
dc.type | Article | en |
dc.identifier.eissn | 1944-8252 | |
dc.contributor.department | Manchester Metropolitan University; University of Chester; | en |
dc.identifier.journal | ACS Applied Materials and Interfaces | |
or.grant.openaccess | Yes | en |
rioxxterms.funder | unfunded | en |
rioxxterms.identifier.project | unfunded | en |
rioxxterms.version | AM | en |
rioxxterms.versionofrecord | https://doi.org/10.1021/acsami.7b05104 | |
rioxxterms.licenseref.startdate | 2018-06-02 | |
html.description.abstract | Two-dimensional molybdenum disulfide (2D-MoS2) screen-printed electrodes (2D-MoS2-SPEs) have been designed, fabricated, and evaluated toward the electrochemical oxygen reduction reaction (ORR) within acidic aqueous media. A screen-printable ink has been developed that allows for the tailoring of the 2D-MoS2 content/mass used in the fabrication of the 2D-MoS2-SPEs, which critically affects the observed ORR performance. In comparison to the graphite SPEs (G-SPEs), the 2D-MoS2-SPEs are shown to exhibit an electrocatalytic behavior toward the ORR which is found, critically, to be reliant upon the percentage mass incorporation of 2D-MoS2 in the 2D-MoS2-SPEs; a greater percentage mass of 2D-MoS2 incorporated into the 2D-MoS2-SPEs results in a significantly less electronegative ORR onset potential and a greater signal output (current density). Using optimally fabricated 2D-MoS2-SPEs, an ORR onset and a peak current of approximately +0.16 V [vs saturated calomel electrode (SCE)] and −1.62 mA cm–2, respectively, are observed, which exceeds the −0.53 V (vs SCE) and −635 μA cm–2 performance of unmodified G-SPEs, indicating an electrocatalytic response toward the ORR utilizing the 2D-MoS2-SPEs. An investigation of the underlying electrochemical reaction mechanism of the ORR within acidic aqueous solutions reveals that the reaction proceeds via a direct four-electron process for all of the 2D-MoS2-SPE variants studied herein, where oxygen is electrochemically favorably reduced to water. The fabricated 2D-MoS2-SPEs are found to exhibit no degradation in the observed achievable current over the course of 1000 repeat scans. The production of such inks and the resultant mass-producible 2D-MoS2-SPEs mitigates the need to modify post hoc an electrode via the drop-casting technique that has been previously shown to result in a loss of achievable current over the course of 1000 repeat scans. The 2D-MoS2-SPEs designed, fabricated, and tested herein could have commercial viability as electrocatalytic fuel cell electrodes because of being economical as a result of their scales of economy and inherent tailorability. The technique utilized herein to produce the 2D-MoS2-SPEs could be adapted for the incorporation of different 2D nanomaterials, resulting in SPEs with the inherent advantages identified above. | |
rioxxterms.publicationdate | 2017-06-02 | |
dc.dateAccepted | 2017-06-02 | |
dc.date.deposited | 2018-05-21 |