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Promoted Self-const...
Promoted Self-construction of β-NiOOH in Amorphous High Entropy Electrocatalysts for the Oxygen Evolution Reaction
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- Han, Mei (author)
- School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China
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- Wang, Changhong (author)
- Institute of Molecular Plus, Tianjin University, Tianjin 300072, China
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- Zhong, Jun (author)
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou 215123, China
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- Han, Jingrui (author)
- School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China
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- Wang, Ning (author)
- School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China; Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
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- Seifitokaldani, Ali (author)
- Department of Chemical Engineering, McGill University, Montreal, H3A 0C5, Canada
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- Yu, Yifu (author)
- Institute of Molecular Plus, Tianjin University, Tianjin 300072, China
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- Liu, Yongchang (author)
- School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China
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- Sun, Xuhui (author)
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou 215123, China
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- Vomiero, Alberto (author)
- Luleå tekniska universitet,Materialvetenskap,Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, 30172 Venezia Mestre, Italy
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- Liang, Hongyan (author)
- School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China
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School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P R. China Institute of Molecular Plus, Tianjin University, Tianjin 300072, China (creator_code:org_t)
- Elsevier, 2022
- 2022
- English.
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In: Applied Catalysis B. - : Elsevier. - 0926-3373 .- 1873-3883. ; 301
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The exploration of an efficient electrocatalyst for the oxygen evolution reaction (OER) is urgently required for sustainable renewable-energy conversion and storage. Due to the increased chemical complexity, multimetallic catalysts provide flexibility to alter their electronic and crystal structure to attain a superior intrinsic catalytic activity via synergistic effects, which is seldom accomplished using single metal catalysts. However, the high chemical complexity increases the difficulty to prepare elemental homogenous catalysts and reveal their synergistic effect during OER process, which further hinder the design of multimetallic catalysts. Here, high entropy concept is utilized to design an NiFeCoMnAl oxide with amorphous structure as OER catalyst. The direct evidence of active Ni sites is provided by the operando Raman measurements and Fe can modify oxygen intermediates binding energy on Ni sites. The X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) reveal that the incorporation of Mn can construct the electron-rich environment of active Ni center, and the relatively lower oxidation state of Ni facilitates the self-construction of β-NiOOH intermediates, which shows promoted OER activity as confirmed by density functional theory calculations. Doping Co can enhance the conductivity and doping Al leads to the formation of nanoporous structure through dealloying process, thus each component is essential for improving OER performance. The optimized NiFeCoMnAl catalyst exhibits an overpotential of 190 mV at 10 mA cm-2 in 1 M KOH solution, much superior to the ternary and quaternary counterparts. This work sheds light on understanding the origin of high entropy catalysts’ OER activity and thereby enables the rational design of multinary transition metallic catalysts.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- high entropy catalysts
- oxygen evolution reaction
- self-construction of β-NiOOH intermediates
- amorphous nanoporous structure
- Experimentell fysik
- Experimental Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Han, Mei
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Wang, Changhong
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Zhong, Jun
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Han, Jingrui
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Wang, Ning
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Seifitokaldani, ...
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show more...
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Yu, Yifu
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Liu, Yongchang
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Sun, Xuhui
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Vomiero, Alberto
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Liang, Hongyan
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
- Articles in the publication
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Applied Catalysi ...
- By the university
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Luleå University of Technology