Iron-concentration adjusted Multi-Metal oxides for optimized oxygen evolution reaction performance

Thi Xuyen Nguyen; Zi Ting Huang; Jyh Ming Ting

doi:10.1016/j.apsusc.2021.151160

Iron-concentration adjusted Multi-Metal oxides for optimized oxygen evolution reaction performance

Thi Xuyen Nguyen, Zi Ting Huang, Jyh Ming Ting

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

Multi-cation oxides based on Mg, Fe, Co, Ni, and Cu have been synthesized through a simple co-precipitation method followed by post annealing. The obtained oxides are used as oxygen evolution reaction (OER) electrocatalysts in water splitting. By doubling the individual metal concentrations in the equimolar (Mg, Fe, Co, Ni, Cu) oxide, Fe was found to play the key role in enhancing the OER performance. The effect of the most dominate Fe on the OER activity was studied by varying the Fe concentration in the equimolar oxide. With the optimized Fe concentration of 40%, the resulting electrocatalyst shows the best OER activity with low overpotential of 300 mV at 10 mA cm⁻², low Tafel slope of 40 mV dec^-1, and excellent electrochemical stability for 25 h.

Original language	English
Article number	151160
Journal	Applied Surface Science
Volume	570
DOIs	https://doi.org/10.1016/j.apsusc.2021.151160
Publication status	Published - 2021 Dec 30

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.apsusc.2021.151160

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title = "Iron-concentration adjusted Multi-Metal oxides for optimized oxygen evolution reaction performance",

abstract = "Multi-cation oxides based on Mg, Fe, Co, Ni, and Cu have been synthesized through a simple co-precipitation method followed by post annealing. The obtained oxides are used as oxygen evolution reaction (OER) electrocatalysts in water splitting. By doubling the individual metal concentrations in the equimolar (Mg, Fe, Co, Ni, Cu) oxide, Fe was found to play the key role in enhancing the OER performance. The effect of the most dominate Fe on the OER activity was studied by varying the Fe concentration in the equimolar oxide. With the optimized Fe concentration of 40%, the resulting electrocatalyst shows the best OER activity with low overpotential of 300 mV at 10 mA cm−2, low Tafel slope of 40 mV dec-1, and excellent electrochemical stability for 25 h.",

author = "Nguyen, {Thi Xuyen} and Huang, {Zi Ting} and Ting, {Jyh Ming}",

note = "Funding Information: This work has been supported by the Ministry of Science and Technology in Taiwan under Grant No. MOST 110-2224-E-006-005. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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doi = "10.1016/j.apsusc.2021.151160",

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journal = "Applied Surface Science",

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AU - Nguyen, Thi Xuyen

AU - Huang, Zi Ting

AU - Ting, Jyh Ming

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Y1 - 2021/12/30

N2 - Multi-cation oxides based on Mg, Fe, Co, Ni, and Cu have been synthesized through a simple co-precipitation method followed by post annealing. The obtained oxides are used as oxygen evolution reaction (OER) electrocatalysts in water splitting. By doubling the individual metal concentrations in the equimolar (Mg, Fe, Co, Ni, Cu) oxide, Fe was found to play the key role in enhancing the OER performance. The effect of the most dominate Fe on the OER activity was studied by varying the Fe concentration in the equimolar oxide. With the optimized Fe concentration of 40%, the resulting electrocatalyst shows the best OER activity with low overpotential of 300 mV at 10 mA cm−2, low Tafel slope of 40 mV dec-1, and excellent electrochemical stability for 25 h.

AB - Multi-cation oxides based on Mg, Fe, Co, Ni, and Cu have been synthesized through a simple co-precipitation method followed by post annealing. The obtained oxides are used as oxygen evolution reaction (OER) electrocatalysts in water splitting. By doubling the individual metal concentrations in the equimolar (Mg, Fe, Co, Ni, Cu) oxide, Fe was found to play the key role in enhancing the OER performance. The effect of the most dominate Fe on the OER activity was studied by varying the Fe concentration in the equimolar oxide. With the optimized Fe concentration of 40%, the resulting electrocatalyst shows the best OER activity with low overpotential of 300 mV at 10 mA cm−2, low Tafel slope of 40 mV dec-1, and excellent electrochemical stability for 25 h.

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Iron-concentration adjusted Multi-Metal oxides for optimized oxygen evolution reaction performance

Abstract

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