Efficient electrochemical water oxidation in neutral and near-neutral systems by nanoscale silver-oxide catalyst

Handle URI:
http://hdl.handle.net/10754/617535
Title:
Efficient electrochemical water oxidation in neutral and near-neutral systems by nanoscale silver-oxide catalyst
Authors:
Joya, Khurram; Ahmad, Zahoor; Joya, Yasir Faheem; Garcia Esparza, Angel T. ( 0000-0002-4884-171X ) ; de Groot, Huub
Abstract:
In electrocatalytic water splitting systems pursuing for renewable energy using sun light, developing robust, stable and easy accessible materials operating under mild chemical conditions is pivotal. We present here unique nano-particulate type silver-oxide (AgOx-NP) based robust and highly stable electrocatalyst for efficient water oxidation. The AgOx-NP is generated in situ in a HCO3–/CO2 system under benign conditions. Mircographs show that they exhibit nanoscale box type squared nano-bipyramidal configuration. The oxygen generation is initiated at low overpotential, and a sustained O2 evolution current density of > 1.1 mA cm–2 is achieved during prolonged-period water electrolysis. The AgOx-NP electrocatalyst performs exceptionally well in metal-ions free neutral or near-neutral carbonate, phosphate and borate buffers relative to recently reported Co-oxide and Ni-oxide based heterogeneous electrocatalysts, which are unstable in metal-ions free electrolyte and tend to degrade with time and lose catalytic performance during long-term experimental tests.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Citation:
Efficient electrochemical water oxidation in neutral and near-neutral systems by nanoscale silver-oxide catalyst 2016 Nanoscale
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Nanoscale
Issue Date:
19-Jul-2016
DOI:
10.1039/C6NR03147A
Type:
Article
ISSN:
2040-3364; 2040-3372
Sponsors:
K.S. Joya acknowledges research funding from the Higher Education Commission (HEC), Government of Pakistan and Leiden University/BioSolar Cells for the research support and facilities. The authors are thankful to Mr. Verhoeven Tiny (TU-Eindhoven) for the XPS experiments and greatly acknowledge the assistance of Dr. Dalaver Anjum (Imaging and Characterization Lab, KAUST) in TEM and related analyses.
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2016/NR/C6NR03147A
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorJoya, Khurramen
dc.contributor.authorAhmad, Zahooren
dc.contributor.authorJoya, Yasir Faheemen
dc.contributor.authorGarcia Esparza, Angel T.en
dc.contributor.authorde Groot, Huuben
dc.date.accessioned2016-07-26T09:31:54Z-
dc.date.available2016-07-26T09:31:54Z-
dc.date.issued2016-07-19-
dc.identifier.citationEfficient electrochemical water oxidation in neutral and near-neutral systems by nanoscale silver-oxide catalyst 2016 Nanoscaleen
dc.identifier.issn2040-3364-
dc.identifier.issn2040-3372-
dc.identifier.doi10.1039/C6NR03147A-
dc.identifier.urihttp://hdl.handle.net/10754/617535-
dc.description.abstractIn electrocatalytic water splitting systems pursuing for renewable energy using sun light, developing robust, stable and easy accessible materials operating under mild chemical conditions is pivotal. We present here unique nano-particulate type silver-oxide (AgOx-NP) based robust and highly stable electrocatalyst for efficient water oxidation. The AgOx-NP is generated in situ in a HCO3–/CO2 system under benign conditions. Mircographs show that they exhibit nanoscale box type squared nano-bipyramidal configuration. The oxygen generation is initiated at low overpotential, and a sustained O2 evolution current density of > 1.1 mA cm–2 is achieved during prolonged-period water electrolysis. The AgOx-NP electrocatalyst performs exceptionally well in metal-ions free neutral or near-neutral carbonate, phosphate and borate buffers relative to recently reported Co-oxide and Ni-oxide based heterogeneous electrocatalysts, which are unstable in metal-ions free electrolyte and tend to degrade with time and lose catalytic performance during long-term experimental tests.en
dc.description.sponsorshipK.S. Joya acknowledges research funding from the Higher Education Commission (HEC), Government of Pakistan and Leiden University/BioSolar Cells for the research support and facilities. The authors are thankful to Mr. Verhoeven Tiny (TU-Eindhoven) for the XPS experiments and greatly acknowledge the assistance of Dr. Dalaver Anjum (Imaging and Characterization Lab, KAUST) in TEM and related analyses.en
dc.language.isoenen
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2016/NR/C6NR03147Aen
dc.rightsArchived with thanks to Nanoscaleen
dc.titleEfficient electrochemical water oxidation in neutral and near-neutral systems by nanoscale silver-oxide catalysten
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalNanoscaleen
dc.eprint.versionPost-printen
dc.contributor.institutionLeiden Institute of Chemistry, Leiden University Einsteinweg 55, P.O. Box 9502, 2300 RA Leiden, The Netherlands.en
dc.contributor.institutionDepartment of Chemistry, University of Engineering and Technology, GT Road 54890 Lahore, Punjab, Pakistanen
dc.contributor.institutionFaculty of Materials Science and Engineering, Ghulam Ishaq Khan (GIK) Institute of Engineering Sciences and Technology Topi 23640, Khyber Pakhtunkhaw, Pakistanen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorJoya, Khurramen
kaust.authorGarcia Esparza, Angel T.en
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