Strain stabilized nickel hydroxide nanoribbons for efficient water splitting

Development of efficient and durable oxygen evolution reaction (OER) catalysts has a direct impact on the water splitting efficiency and cost effectiveness. In this work, we report the successful synthesis of a new Ni(OH) 2 structure, strain-stabilized Ni(OH) 2 nanoribbons (NR-Ni(OH) 2 ) two to thre...

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Published in:Energy & environmental science 2020-01, Vol.13 (1), p.229-237
Main Authors: Wang, X. P, Wu, H. J, Xi, S. B, Lee, W. S. V, Zhang, J, Wu, Z. H, Wang, J. O, Hu, T. D, Liu, L. M, Han, Y, Chee, S. W, Ning, S. C, Mirsaidov, U, Wang, Z. B, Zhang, Y. W, Borgna, A, Wang, J, Du, Y. H, Yu, Z. G, Pennycook, S. J, Xue, J. M
Format: Article
Language:English
Subjects:
Catalysts
Catalytic activity
Cost effectiveness
Industrial applications
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
MATERIALS SCIENCE
Nanoribbons
Nickel
Nickel compounds
Oxidation
Oxygen
Oxygen evolution reactions
Splitting
Water splitting
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Summary:Development of efficient and durable oxygen evolution reaction (OER) catalysts has a direct impact on the water splitting efficiency and cost effectiveness. In this work, we report the successful synthesis of a new Ni(OH) 2 structure, strain-stabilized Ni(OH) 2 nanoribbons (NR-Ni(OH) 2 ) two to three layers thick, with widths of 2-5 nm, via an electro-oxidation route. Conventional Ni(OH) 2 usually has negligible OER activity, while NR-Ni(OH) 2 shows high activity for the oxygen evolution reaction and an overpotential of 162 millivolts and furthermore exhibits long-term stability in alkaline electrolyte. The substantial reduction in the overpotential of NR-Ni(OH) 2 is due to its easier OOH* adsorption by the active four-coordinated Ni edge sites. The enhanced catalytic activity of NR-Ni(OH) 2 makes it an excellent candidate for industrial applications. Development of efficient and durable oxygen evolution reaction (OER) catalysts has a direct impact on the water splitting efficiency and cost effectiveness.
ISSN:1754-5692
1754-5706
DOI:10.1039/c9ee02565k