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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
Energy & environmental science, 01/2020, Volume: 13, Issue: 1Journal Article
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.
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