University of Oulu

Nan Yu, Wei Cao, Marko Huttula, Yves Kayser, Philipp Hoenicke, Burkhard Beckhoff, Fengyu Lai, Ruohao Dong, Hongxia Sun, Baoyou Geng, Fabrication of FeNi hydroxides double-shell nanotube arrays with enhanced performance for oxygen evolution reaction, Applied Catalysis B: Environmental, Volume 261, 2020, 118193, ISSN 0926-3373, https://doi.org/10.1016/j.apcatb.2019.118193

Fabrication of FeNi hydroxides double-shell nanotube arrays with enhanced performance for oxygen evolution reaction

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Author: Yu, Nan1; Huttula, Marko2; Kayser, Yves3;
Organizations: 1College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Ministry of Education, The Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Normal University, Wuhu, 241002, China
2Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box. 3000, FI-90014, Finland
3Physikalisch-Technische Bundesanstalt, X-ray Spectrometry Abbestr. 2-12, 10587, Berlin, Germany
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2019120545837
Language: English
Published: Elsevier, 2020
Publish Date: 2021-09-26
Description:

Abstract

FeNi Hydroxides (FeNi-HD) have been considered as promising substitutes to noble metal electrocatalysts for oxygen evolution reaction (OER). In this work, we design and realize FeNi-HD nanotube arrays (FeNi-HDNAs) on Ni foam via an in-situ reaction and Kirkendall effect. The obtained catalysts possess higher specific surface area, more catalytic active sites and better chemical stability for OER. Electron migrations from the Fe 3d orbitals to Ni sites in the FeNi-HDNAs lead to more unoccupied Fe 3d states and a higher oxidation state. As expected, FeNi-HDNAs exhibit lower overpotential as well as lower Tafel slope and better durability than the Fe- or Ni-HD peers. DFT calculations elucidate that FeNi hydroxides lower the energy barrier of rate-determining step in OER. Moreover, a high current density of 10 mA cm−2 is obtained at a low potential of 1.49 V using FeNi-HDNAs as the bifunctional electrocatalyst for overall water splitting in basic solution.

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Series: Applied catalysis. B, Environmental
ISSN: 0926-3373
ISSN-E: 1873-3883
ISSN-L: 0926-3373
Volume: 261
Article number: 118193
DOI: 10.1016/j.apcatb.2019.118193
OADOI: https://oadoi.org/10.1016/j.apcatb.2019.118193
Type of Publication: A1 Journal article – refereed
Field of Science: 218 Environmental engineering
221 Nanotechnology
114 Physical sciences
Subjects:
Funding: This work was supported by the National Natural Science Foundation of China (21871005, 21471006), the Academy of Finland (No. 311934), the Recruitment Program for Leading Talent Team of Anhui Province, the Program for Innovative Research Team of Anhui Education Committee, and the Research Foundation for Science and Technology Leaders and Candidates of Anhui Province, the Research Foundation of Anhui Education Committee (KJ2017A312) and Innovation Fund of Anhui Normal University (2018).
Copyright information: © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/