Bixbyite-type Ln2O3 as promoters of metallic Ni for alkaline electrocatalytic hydrogen evolution
© 2022. The Author(s)..
The active-site density, intrinsic activity, and durability of Ni-based catalysts are critical to their application in industrial alkaline water electrolysis. This work develops a kind of promoters, the bixbyite-type lanthanide metal sesquioxides (Ln2O3), which can be implanted into metallic Ni by selective high-temperature reduction to achieve highly efficient Ni/Ln2O3 hybrid electrocatalysts toward hydrogen evolution reaction. The screened Ni/Yb2O3 catalyst shows the low overpotential (20.0 mV at 10 mA cm-2), low Tafel slope (44.6 mV dec-1), and excellent long-term durability (360 h at 500 mA cm-2), significantly outperforming the metallic Ni and benchmark Pt/C catalysts. The remarkable hydrogen evolution activity and stability of Ni/Yb2O3 are attributed to that the Yb2O3 promoter with high oxophilicity and thermodynamic stability can greatly enlarge the active-site density, reduce the energy barrier of water dissociation, optimize the free energy of hydrogen adsorption, and avoid the oxidation corrosion of Ni.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:13 |
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| Enthalten in: |
Nature communications - 13(2022), 1 vom: 05. Juli, Seite 3857 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Sun, Hongming [VerfasserIn] |
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| Anmerkungen: |
Date Revised 16.07.2022 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1038/s41467-022-31561-4 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM343113945 |
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| 520 | |a © 2022. The Author(s). | ||
| 520 | |a The active-site density, intrinsic activity, and durability of Ni-based catalysts are critical to their application in industrial alkaline water electrolysis. This work develops a kind of promoters, the bixbyite-type lanthanide metal sesquioxides (Ln2O3), which can be implanted into metallic Ni by selective high-temperature reduction to achieve highly efficient Ni/Ln2O3 hybrid electrocatalysts toward hydrogen evolution reaction. The screened Ni/Yb2O3 catalyst shows the low overpotential (20.0 mV at 10 mA cm-2), low Tafel slope (44.6 mV dec-1), and excellent long-term durability (360 h at 500 mA cm-2), significantly outperforming the metallic Ni and benchmark Pt/C catalysts. The remarkable hydrogen evolution activity and stability of Ni/Yb2O3 are attributed to that the Yb2O3 promoter with high oxophilicity and thermodynamic stability can greatly enlarge the active-site density, reduce the energy barrier of water dissociation, optimize the free energy of hydrogen adsorption, and avoid the oxidation corrosion of Ni | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Yan, Zhenhua |e verfasserin |4 aut | |
| 700 | 1 | |a Tian, Caiying |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Cha |e verfasserin |4 aut | |
| 700 | 1 | |a Feng, Xin |e verfasserin |4 aut | |
| 700 | 1 | |a Huang, Rong |e verfasserin |4 aut | |
| 700 | 1 | |a Lan, Yinghui |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Jing |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Cheng-Peng |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Zhihong |e verfasserin |4 aut | |
| 700 | 1 | |a Du, Miao |e verfasserin |4 aut | |
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