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Wang, Xiaopeng; Xi, Shibo; Lee, Wee Siang Vincent; Huang, Pengru; Cui, Peng; Zhao, Lei; Hao, Weichang; Zhao, Xinsheng; Wang, Zhenbo; Wu, Haijun; Wang, Hao; Diao, Caozheng; Borgna, Armando; Du, Yonghua; Yu, Zhi Gen; Pennycook, Stephen; Xue, Junmin
Nature communications, 09/2020, Letnik: 11, Številka: 1Journal Article
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.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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