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Atomic and electronic modulation of self-supported nickel-vanadium layered double hydroxide to accelerate water splitting kinetics

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Wang, Dewen, Li, Qun, Han, Ce, Lu, Qingqing, Xing, Zhicai, Yang, Xiurong·2019·Nature Communications
DOI 10.1038/s41467-019-11765-x
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Abstract

Herein, ruthenium (Ru) and iridium (Ir) are introduced to tailor the atomic and electronic structure of self-supported nickel-vanadium (NiV) layered double hydroxide to accelerate water splitting kinetics, and the origin of high hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities are analyzed at atomic level. X-ray photoelectron spectroscopy and X-ray absorption near-edge structure spectroscopy studies reveal synergistic electronic interactions among Ni, V, and Ru (Ir) cations. Raman spectra and Fourier and wavelet transform analyses of the extended X-ray absorption fine structure indicate modulated local coordination environments around the Ni and V cations, and the existence of V vacancies. The Debye–Waller factor suggests a severely distorted octahedral V environment caused by the incorporation of Ru and Ir. Theoretical calculations further confirm that Ru or Ir doping could optimize the adsorption energy of intermediates in the Volmer and Heyrovsky steps for HER and accelerate the whole kinetic process for OER.

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Metadata

Authors
Wang, D., Li, Q., Han, C., Lu, Q., Xing, Z., & Yang, X.
Venue
Nature Communications
Publisher
Springer Science and Business Media LLC
Published
2019-08-29
Volume
10
Issue
1
Pages
3899-3899
ISSN
2041-1723 (ISSN-L)
DOI
10.1038/s41467-019-11765-x
OpenAlex
W2970983686
Cited by
557
References
13
FWCI
13.45
Type
journal article
Language
en
Open access
gold
Licence
Funders
  • National Natural Science Foundation of China (No. 21435005 and 21627808)
  • Key Research Program of Frontier Sciences, Chinese Academy of Sciences (No. QYZDY-SSW-SLH019).

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Wang, D., Li, Q., Han, C., Lu, Q., Xing, Z., & Yang, X. (2019). Atomic and electronic modulation of self-supported nickel-vanadium layered double hydroxide to accelerate water splitting kinetics. Nature Communications. https://doi.org/10.1038/s41467-019-11765-x

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