Please use this identifier to cite or link to this item: 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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