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Efficient solar water oxidation using photovoltaic devices functionalized with earth-abundant oxygen evolving catalysts (Articolo in rivista)

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Efficient solar water oxidation using photovoltaic devices functionalized with earth-abundant oxygen evolving catalysts (Articolo in rivista) (literal)

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Cristino, Vito and Berardi, Serena and Caramori, Stefano and Argazzi, Roberto and Carli, Stefano and Meda, Laura and Tacca, Alessandra and Bignozzi, Carlo Alberto (2013)
Efficient solar water oxidation using photovoltaic devices functionalized with earth-abundant oxygen evolving catalysts
in PCCP. Physical chemistry chemical physics (Print); ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE,, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND (Regno Unito)
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Cristino, Vito and Berardi, Serena and Caramori, Stefano and Argazzi, Roberto and Carli, Stefano and Meda, Laura and Tacca, Alessandra and Bignozzi, Carlo Alberto (literal)

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Caramori, S (Reprint Author), Univ Ferrara, Dept Chem & Pharmaceut Sci, Via Luigi Borsari 46, I-44121 Ferrara, Italy. Cristino, Vito; Caramori, Stefano; Carli, Stefano; Bignozzi, Carlo Alberto, Univ Ferrara, Dept Chem & Pharmaceut Sci, I-44121 Ferrara, Italy. Berardi, Serena; Argazzi, Roberto, Univ Ferrara, Dept Chem & Pharmaceut Sci, ISOF CNR, I-44121 Ferrara, Italy. Meda, Laura; Tacca, Alessandra, Ist ENI Donegani Energie Non Convenz, I-28100 Novara, Italy. (literal)

Titolo

Efficient solar water oxidation using photovoltaic devices functionalized with earth-abundant oxygen evolving catalysts (literal)

Abstract

Indium tin oxide (ITO) surfaces of triple junction photovoltaic cells were functionalized with oxygen evolving catalysts (OECs) based on amorphous hydrous earth-abundant metal oxides (metal = Fe, Ni, Co), obtained by straightforward Successive Ionic Layer Adsorption and Reaction (SILAR) in an aqueous environment. Functionalization with Fe(III) oxides gave the best results, leading to photoanodes capable of efficiently splitting water, with photocurrent densities up to 6 +/- 1 mA cm(-2) at 0 V vs. the reversible hydrogen electrode (RHE) under AM 1.5 G simulated sunlight illumination. The resulting Solar To Hydrogen (STH) conversion efficiencies, measured in two electrodes configuration, were in the range 3.7-5%, depending on the counter electrode that was employed. Investigations on the stability showed that these photoanodes were able to sustain 120 minutes of continuous illumination with a < 10% photocurrent loss at 0 V vs. RHE. Pristine photoanodic response of the cells could be fully restored by an additional SILAR cycle, evidencing that the observed loss is due to the detachment of the more weakly surface bound catalyst. (literal)

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