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https://doi.org/10.1038/s41467-020-18459-9
Title: | Materializing efficient methanol oxidation via electron delocalization in nickel hydroxide nanoribbon | Authors: | Wang, X. Xi, S. Lee, W.S.V. Huang, P. Cui, P. Zhao, L. Hao, W. Zhao, X. Wang, Z. Wu, H. Wang, H. Diao, C. Borgna, A. Du, Y. Yu, Z.G. Pennycook, S. Xue, J. |
Issue Date: | 16-Sep-2020 | Publisher: | Nature Research | Citation: | Wang, X., Xi, S., Lee, W.S.V., Huang, P., Cui, P., Zhao, L., Hao, W., Zhao, X., Wang, Z., Wu, H., Wang, H., Diao, C., Borgna, A., Du, Y., Yu, Z.G., Pennycook, S., Xue, J. (2020-09-16). Materializing efficient methanol oxidation via electron delocalization in nickel hydroxide nanoribbon. Nature Communications 11 (1) : 4647. ScholarBank@NUS Repository. https://doi.org/10.1038/s41467-020-18459-9 | Rights: | Attribution 4.0 International | Abstract: | Achieving a functional and durable non-platinum group metal-based methanol oxidation catalyst is critical for a cost-effective direct methanol fuel cell. While Ni(OH)2 has been widely studied as methanol oxidation catalyst, the initial process of oxidizing Ni(OH)2 to NiOOH requires a high potential of 1.35 V vs. RHE. Such potential would be impractical since the theoretical potential of the cathodic oxygen reduction reaction is at 1.23 V. Here we show that a four-coordinated nickel atom is able to form charge-transfer orbitals through delocalization of electrons near the Fermi energy level. As such, our previously reported periodically arranged four-six-coordinated nickel hydroxide nanoribbon structure (NR-Ni(OH)2) is able to show remarkable methanol oxidation activity with an onset potential of 0.55 V vs. RHE and suggests the operability in direct methanol fuel cell configuration. Thus, this strategy offers a gateway towards the development of high performance and durable non-platinum direct methanol fuel cell. © 2020, The Author(s). | Source Title: | Nature Communications | URI: | https://scholarbank.nus.edu.sg/handle/10635/198715 | ISSN: | 20411723 | DOI: | 10.1038/s41467-020-18459-9 | Rights: | Attribution 4.0 International |
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