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dc.contributor.authorPedireddy, Srikanth
dc.contributor.authorJimenez Sandoval, Rodrigo J.
dc.contributor.authorRavva, Mahesh Kumar
dc.contributor.authorNayak, Chandrani
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorJha, Shambhu Nath
dc.contributor.authorKaturi, Krishna
dc.contributor.authorSaikaly, Pascal
dc.date.accessioned2021-03-24T12:54:27Z
dc.date.available2021-03-24T12:54:27Z
dc.date.issued2021-03-15
dc.date.submitted2021-02-03
dc.identifier.citationPedireddy, S., Jimenez-Sandoval, R., Ravva, M. K., Nayak, C., Anjum, D. H., Jha, S. N., … Saikaly, P. E. (2021). Harnessing the Extracellular Electron Transfer Capability of Geobacter sulfurreducens for Ambient Synthesis of Stable Bifunctional Single-Atom Electrocatalyst for Water Splitting. Advanced Functional Materials, 2010916. doi:10.1002/adfm.202010916
dc.identifier.issn1616-301X
dc.identifier.issn1616-3028
dc.identifier.doi10.1002/adfm.202010916
dc.identifier.doi10.1002/adfm.202170161
dc.identifier.urihttp://hdl.handle.net/10754/668243
dc.description.abstractSingle-atom metal (SA-M) catalysts with high dispersion of active metal sites allow maximum atomic utilization. Conventional synthesis of SA-M catalysts involves high-temperature treatments, leading to low yield with a random distribution of atoms. Herein, a nature-based facile method to synthesize SA-M catalysts (M = Fe, Ir, Pt, Ru, Cu, or Pd) in a single step at ambient temperature, using the extracellular electron transfer capability of Geobacter sulfurreducens (GS), is presented. Interestingly, the SA-M is coordinated to three nitrogen atoms adopting an MN3 on the surface of GS. Dry samples of SA-Ir@GS without further heat treatment show exceptionally high activity for oxygen evolution reaction when compared to benchmark IrO2 catalyst and comparable hydrogen evolution reaction activity to commercial 10 wt% Pt/C. The SA-Ir@GS exhibits the best water-splitting performance compared to other SA-M@GS, showing a low applied potential of 1.65 V to achieve 10 mA cm−2 in 1.0 M KOH with cycling over 5 h. The density functional calculations reveal that the large adsorption energy of H2O and moderate adsorption energies of reactants and reaction intermediates for SA-Ir@GS favorably improve its activity. This synthesis method at room temperature provides a versatile platform for the preparation of SA-M catalysts for various applications by merely altering the metal precursors.
dc.description.sponsorshipThis work was supported by Competitive Research Grant (URF/1/2985-01-01) from King Abdullah University of Science and Technology to P.E.S. The authors thank the synchrotron facility at the Raja Ramanna Centre for Advanced Technology (RRCAT), Indore, India. The authors are thankful to KAUST Supercomputing Core Lab.
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/10.1002/adfm.202010916
dc.rightsArchived with thanks to Advanced Functional Materials
dc.titleHarnessing the Extracellular Electron Transfer Capability of Geobacter sulfurreducens for Ambient Synthesis of Stable Bifunctional Single-Atom Electrocatalyst for Water Splitting
dc.typeArticle
dc.contributor.departmentBiological and Environmental Science and Engineering (BESE) Division
dc.contributor.departmentDivision of Biological and Environmental Science and Engineering Water Desalination and Reuse Center King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia
dc.contributor.departmentEnvironmental Biotechnology Research Group
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalAdvanced Functional Materials
dc.rights.embargodate2022-03-15
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Chemistry SRM University AP Amaravati Andhra Pradesh 522502 India
dc.contributor.institutionAtomic and Molecular Physics Division Bhabha Atomic Research Centre Trombay Mumbai 400085 India
dc.contributor.institutionDepartment of Physics Khalifa University Abu Dhabi 127788 UAE
dc.identifier.pages2010916
kaust.personPedireddy, Srikanth
kaust.personJimenez Sandoval, Rodrigo J.
kaust.personKaturi, Krishna
kaust.personSaikaly, Pascal
kaust.grant.numberURF/1/2985-01-01
dc.date.accepted2021-03-15
dc.identifier.eid2-s2.0-85102459018
refterms.dateFOA2021-03-25T05:28:06Z
kaust.acknowledged.supportUnitCompetitive Research
dc.date.published-online2021-03-15
dc.date.published-print2021-05


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