Electrosynthesis of highly transparent cobalt oxide water oxidation catalyst films from cobalt aminopolycarboxylate complexes

Shannon Bonke, Mathias Wiechen, Rosalie Katherine Hocking, Xi-Ya Fang, David Lupton, Douglas Robert Macfarlane, Leone Spiccia

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Efficient catalysis of water oxidation represents one of the major challenges en route to efficient sunlight-driven water splitting. Cobalt oxides (CoOx) have been widely investigated as water oxidation catalysts, although the incorporation of these materials into photoelectrochemical devices has been hindered by a lack of transparency. Herein, the electrosynthesis of transparent CoOx catalyst films is described by utilizing cobalt(II) aminopolycarboxylate complexes as precursors to the oxide. These complexes allow control over the deposition rate and morphology to enable the production of thin, catalytic CoOx films on a conductive substrate, which can be exploited in integrated photoelectrochemical devices. Notably, under a bias of 1.0 V (vs. Ag/AgCl), the film deposited from [Co(NTA)(OH2)2]- (NTA=nitrilotriacetate) decreased the transmission by only 10 at ?=500 nm, but still generated >80 of the water oxidation current produced by a [Co(OH2)6]2+-derived oxide film whose transmission was only 40 at ?=500 nm.
Original languageEnglish
Pages (from-to)1394-1403
Number of pages10
JournalChemSusChem
Volume8
Issue number8
DOIs
Publication statusPublished - 2015

Keywords

  • cobalt
  • electrochemistry
  • energy conversion
  • heterogeneous catalysis
  • water splitting

Cite this

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title = "Electrosynthesis of highly transparent cobalt oxide water oxidation catalyst films from cobalt aminopolycarboxylate complexes",
abstract = "Efficient catalysis of water oxidation represents one of the major challenges en route to efficient sunlight-driven water splitting. Cobalt oxides (CoOx) have been widely investigated as water oxidation catalysts, although the incorporation of these materials into photoelectrochemical devices has been hindered by a lack of transparency. Herein, the electrosynthesis of transparent CoOx catalyst films is described by utilizing cobalt(II) aminopolycarboxylate complexes as precursors to the oxide. These complexes allow control over the deposition rate and morphology to enable the production of thin, catalytic CoOx films on a conductive substrate, which can be exploited in integrated photoelectrochemical devices. Notably, under a bias of 1.0 V (vs. Ag/AgCl), the film deposited from [Co(NTA)(OH2)2]- (NTA=nitrilotriacetate) decreased the transmission by only 10 at ?=500 nm, but still generated >80 of the water oxidation current produced by a [Co(OH2)6]2+-derived oxide film whose transmission was only 40 at ?=500 nm.",
keywords = "cobalt, electrochemistry, energy conversion, heterogeneous catalysis, water splitting",
author = "Shannon Bonke and Mathias Wiechen and Hocking, {Rosalie Katherine} and Xi-Ya Fang and David Lupton and Macfarlane, {Douglas Robert} and Leone Spiccia",
year = "2015",
doi = "10.1002/cssc.201403188",
language = "English",
volume = "8",
pages = "1394--1403",
journal = "ChemSusChem",
issn = "1864-5631",
publisher = "Wiley-Blackwell",
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Electrosynthesis of highly transparent cobalt oxide water oxidation catalyst films from cobalt aminopolycarboxylate complexes. / Bonke, Shannon; Wiechen, Mathias; Hocking, Rosalie Katherine; Fang, Xi-Ya; Lupton, David; Macfarlane, Douglas Robert; Spiccia, Leone.

In: ChemSusChem, Vol. 8, No. 8, 2015, p. 1394-1403.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Electrosynthesis of highly transparent cobalt oxide water oxidation catalyst films from cobalt aminopolycarboxylate complexes

AU - Bonke, Shannon

AU - Wiechen, Mathias

AU - Hocking, Rosalie Katherine

AU - Fang, Xi-Ya

AU - Lupton, David

AU - Macfarlane, Douglas Robert

AU - Spiccia, Leone

PY - 2015

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N2 - Efficient catalysis of water oxidation represents one of the major challenges en route to efficient sunlight-driven water splitting. Cobalt oxides (CoOx) have been widely investigated as water oxidation catalysts, although the incorporation of these materials into photoelectrochemical devices has been hindered by a lack of transparency. Herein, the electrosynthesis of transparent CoOx catalyst films is described by utilizing cobalt(II) aminopolycarboxylate complexes as precursors to the oxide. These complexes allow control over the deposition rate and morphology to enable the production of thin, catalytic CoOx films on a conductive substrate, which can be exploited in integrated photoelectrochemical devices. Notably, under a bias of 1.0 V (vs. Ag/AgCl), the film deposited from [Co(NTA)(OH2)2]- (NTA=nitrilotriacetate) decreased the transmission by only 10 at ?=500 nm, but still generated >80 of the water oxidation current produced by a [Co(OH2)6]2+-derived oxide film whose transmission was only 40 at ?=500 nm.

AB - Efficient catalysis of water oxidation represents one of the major challenges en route to efficient sunlight-driven water splitting. Cobalt oxides (CoOx) have been widely investigated as water oxidation catalysts, although the incorporation of these materials into photoelectrochemical devices has been hindered by a lack of transparency. Herein, the electrosynthesis of transparent CoOx catalyst films is described by utilizing cobalt(II) aminopolycarboxylate complexes as precursors to the oxide. These complexes allow control over the deposition rate and morphology to enable the production of thin, catalytic CoOx films on a conductive substrate, which can be exploited in integrated photoelectrochemical devices. Notably, under a bias of 1.0 V (vs. Ag/AgCl), the film deposited from [Co(NTA)(OH2)2]- (NTA=nitrilotriacetate) decreased the transmission by only 10 at ?=500 nm, but still generated >80 of the water oxidation current produced by a [Co(OH2)6]2+-derived oxide film whose transmission was only 40 at ?=500 nm.

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KW - electrochemistry

KW - energy conversion

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