Cited by 494Electrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsAdvanced Photocatalysis Techniques

From Water Oxidation to Reduction: Homologous Ni–Co Based Nanowires as Complementary Water Splitting Electrocatalysts

Peng, Zheng, Jia, Dingsi, Al‐Enizi, Abdullah M., Elzatahry, Ahmed A., Zheng, Gengfeng·2015·Advanced Energy Materials

Abstract

A homologous Ni–Co based nanowire system, consisting of both nickel cobalt oxide and nickel cobalt sulfide nanowires, is developed for efficient, complementary water splitting. The spinel‐type nickel cobalt oxide (NiCo2O4) nanowires are hydrothermally synthesized and can serve as an excellent oxygen evolution reaction catalyst. Subsequent sulfurization of the NiCo2O4 nanowires leads to the formation of pyrite‐type nickel cobalt sulfide (Ni0.33Co0.67S2) nanowires. Due to the 1D nanowire morphology and enhanced charge transport capability, the Ni0.33Co0.67S2 nanowires function as an efficient, stable, and robust nonnoble metal electrocatalyst for hydrogen evolution reaction (HER), substantially exceeding CoS2 or NiS2 nanostructures synthesized under similar methods. The Ni0.33Co0.67S2 nanowires exhibit low onset potential of −65, −39, and −50 mV versus reversible hydrogen electrode, Tafel slopes of 44, 68, and 118 mV dec−1 at acidic, neutral, and basic conditions, respectively, and excellent stability, comparable to the best reported non‐noble metal‐based HER catalysts. Furthermore, the homologous Ni0.33Co0.67S2 nanowires and NiCo2O4 nanowires are assembled into an all‐nanowire based water splitting electrolyzer with a current density of 5 mA cm−2 at a voltage as 1.65 V, thus suggesting a unique homologous, earth abundant material system for water splitting.

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Crossref · 10.1002/aenm.201402031

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Authors
Peng, Z., Jia, D., Al‐Enizi, A. M., Elzatahry, A. A., & Zheng, G.
Affiliations
  • Fudan University (CN)
  • King Saud University (SA)
  • Qatar University (QA)
Corresponding author
Zheng, Gengfeng
Venue
Advanced Energy Materials
Publisher
Wiley
Published
2015-02-16
Volume
5
Issue
9
ISSN
  • 1614-6832 (ISSN-L)
  • 1614-6840
OpenAlex
W2144307294
Cited by
494
References
37
Citations by year
2026: 10 · 2025: 11 · 2024: 18 · 2023: 26 · 2022: 37 · 2021: 46 · 2020: 40 · 2019: 69 · 2018: 78 · 2017: 84 · 2016: 56 · 2015: 19
FWCI
23.39
Type
journal article
Language
en
Open access
closed
Locations
  • Advanced Energy Materials (publishedVersion)
  • Qatar University QSpace (Qatar University) (submittedVersion)
Funders
  • National Key Basic Research Program of China (2013CB934104)
  • Natural Science Foundation of China (21322311, 21473038, 21071033)
  • Science and Technology Commission of Shanghai Municipality (14JC1490500)
  • Doctoral Fund of Ministry of Education of China (20130071110031)
  • Program for Professor of Special Appointment
  • Deanship of Scientific Research at King Saud University (RG#1435-010)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
Keywords
water splitting, oxygen evolution reaction, hydrogen evolution reaction, NiCo2O4 nanowires, nickel cobalt oxide, NiCo2S4, sulfidation, non-noble metal electrocatalysts, spinel oxides, charge transport, earth-abundant catalysts

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