Plasmon-enhanced electrocatalytic oxygen reduction in alkaline media on gold nanohole electrodes

Plasmon-driven chemical transformation has become a promising approach for enhancing sluggish electrocatalytic reactions. Herein, an alternative enhancement strategy employing plasmon-induced hot electrons was developed and found to be competitive with oxygen reduction reaction (ORR) on platinum ele...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 8; no. 2; pp. 1395 - 141
Main Authors Saada, Tamazouzt Nait, Marques da Silva, Anderson Gabriel, Subramanian, Palaniappan, Pang, Liuqing, Adnane, Noual, Djafari-Rouhani, Bahram, Mishyn, Vladyslav, Meziane, Dalila, Melinte, Sorin, Sandu, Georgiana, Dumeignil, Franck, Paul, Sébastien, Wojcieszak, Robert, Boukherroub, Rabah, Szunerits, Sabine
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 01.01.2020
Subjects
Catalysis
Catalysts
Chemical reactions
Chemical reduction
Chemical Sciences
Electrochemical analysis
Electrochemistry
Electrodes
Gold
Hot electrons
Irradiation
Material chemistry
Other
Oxygen
Oxygen reduction reactions
Platinum
Thin films
Wavelength
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Summary:Plasmon-driven chemical transformation has become a promising approach for enhancing sluggish electrocatalytic reactions. Herein, an alternative enhancement strategy employing plasmon-induced hot electrons was developed and found to be competitive with oxygen reduction reaction (ORR) on platinum electrodes. We demonstrated that, by using the intertwined plasmon-catalytic-electrochemical properties of nanoperforated gold thin film electrodes, the ORR under alkaline conditions could be significantly enhanced by careful tuning of the laser wavelength and power density. Irradiation at 980 nm and 2 W cm −2 displays maximal current densities of j = −6.0 A cm −2 at 0.95 V vs. RHE, under hydrodynamic conditions, comparable to that of commercial Pt/C (40 wt%) catalysts, with good long-term stability. The wavelength-dependent electrochemical reduction confirmed that the hot carriers formed during plasmon decay are responsible for the improved electrocatalytic performance. Plasmon-driven chemical transformation has become a promising approach for enhancing sluggish electrocatalytic reactions.
Bibliography:10.1039/c9ta14174j
Electronic supplementary information (ESI) available. See DOI
ISSN:2050-7488
2050-7496
2050-7496
DOI:10.1039/c9ta14174j