An Efficient and Stable Hydrophobic Molecular Cobalt Catalyst for Water Electro-oxidation at Neutral pH

Handle URI:
http://hdl.handle.net/10754/621693
Title:
An Efficient and Stable Hydrophobic Molecular Cobalt Catalyst for Water Electro-oxidation at Neutral pH
Authors:
Chen, Batian ( 0000-0002-9228-5829 ) ; Morlanes, Natalia Sanchez ( 0000-0002-5356-9255 ) ; Adogla, Enoch; Takanabe, Kazuhiro ( 0000-0001-5374-9451 ) ; Rodionov, Valentin
Abstract:
The synthesis of a library of molecular water oxidation catalysts based on the Co complex of tris(2-benzimidazolylmethyl)amine is described. Hydrophobicity was identified as the key variable in mediating the catalytic competence of the complexes. The change in this parameter correlates with both the conformational mobility of the ligand core and the structural changes in the local solvent environment around the metal site. The optimal Co complex identified is hydrophobic, because of three semifluorinated side chains. It catalyzes water electro-oxidation efficiently at neutral pH, with an overpotential of 390 mV and a turnover frequency (TOF) of 1.83 s-1 in the absence of soluble Co salts. The catalyst can be immobilized through physisorption, and it remains stable in prolonged electrolysis experiments. © 2016 American Chemical Society.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division
Citation:
Chen B-T, Morlanés N, Adogla E, Takanabe K, Rodionov VO (2016) An Efficient and Stable Hydrophobic Molecular Cobalt Catalyst for Water Electro-oxidation at Neutral pH. ACS Catalysis 6: 4647–4652. Available: http://dx.doi.org/10.1021/acscatal.6b01237.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Catalysis
Issue Date:
14-Jun-2016
DOI:
10.1021/acscatal.6b01237
Type:
Article
ISSN:
2155-5435; 2155-5435
Sponsors:
This research was supported by King Abdullah University of Science and Technology (KAUST).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorChen, Batianen
dc.contributor.authorMorlanes, Natalia Sanchezen
dc.contributor.authorAdogla, Enochen
dc.contributor.authorTakanabe, Kazuhiroen
dc.contributor.authorRodionov, Valentinen
dc.date.accessioned2016-11-03T13:22:54Z-
dc.date.available2016-11-03T13:22:54Z-
dc.date.issued2016-06-14en
dc.identifier.citationChen B-T, Morlanés N, Adogla E, Takanabe K, Rodionov VO (2016) An Efficient and Stable Hydrophobic Molecular Cobalt Catalyst for Water Electro-oxidation at Neutral pH. ACS Catalysis 6: 4647–4652. Available: http://dx.doi.org/10.1021/acscatal.6b01237.en
dc.identifier.issn2155-5435en
dc.identifier.issn2155-5435en
dc.identifier.doi10.1021/acscatal.6b01237en
dc.identifier.urihttp://hdl.handle.net/10754/621693-
dc.description.abstractThe synthesis of a library of molecular water oxidation catalysts based on the Co complex of tris(2-benzimidazolylmethyl)amine is described. Hydrophobicity was identified as the key variable in mediating the catalytic competence of the complexes. The change in this parameter correlates with both the conformational mobility of the ligand core and the structural changes in the local solvent environment around the metal site. The optimal Co complex identified is hydrophobic, because of three semifluorinated side chains. It catalyzes water electro-oxidation efficiently at neutral pH, with an overpotential of 390 mV and a turnover frequency (TOF) of 1.83 s-1 in the absence of soluble Co salts. The catalyst can be immobilized through physisorption, and it remains stable in prolonged electrolysis experiments. © 2016 American Chemical Society.en
dc.description.sponsorshipThis research was supported by King Abdullah University of Science and Technology (KAUST).en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectbenzimidazoleen
dc.titleAn Efficient and Stable Hydrophobic Molecular Cobalt Catalyst for Water Electro-oxidation at Neutral pHen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalACS Catalysisen
dc.contributor.institutionDepartment of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, SC, United Statesen
kaust.authorChen, Batianen
kaust.authorMorlanes, Natalia Sanchezen
kaust.authorTakanabe, Kazuhiroen
kaust.authorRodionov, Valentinen
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