Cited by 182Electrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsLayered Double Hydroxides Synthesis and Applications

Ir–O–V Catalytic Group in Ir-Doped NiV(OH)2 for Overall Water Splitting

Li, Shuang, Xi, Cong, Jin, Yong-Zhen, Wu, Deyao, Wang, Jia-Qi, Liu, Tao, Wang, Hai-Bin, Dong, Cun-Ku +3 more·2019·ACS Energy Letters

Abstract

Bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are very crucial for converting water into clean fuel through overall water splitting. Here, we report on a bifunctional catalyst based on Ir-doped NiV layered double hydroxide with Ir–O–V catalytic groups on which water dissociation, HER, and OER occur on Ir, bridge O, and V atoms, respectively. Interestingly, the dopant Ir ions were found to play a triple role: (i) serve as catalytic sites for water dissociation, (ii) reduce charge density on adjacent bridge oxygen, thus facilitating HER there, and (iii) increase charge density on V ions, which in turn boosts OER. As a result, the catalyst achieves an ultralow applied voltage for overall water splitting (1.49 V @ 10 mA cm –2 ) and beats the noble metallic couple Pt/C and Ir/C with its value of 1.60 V @ 10 mA cm –2 .

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Crossref · 10.1021/acsenergylett.9b01252

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  • The high-resolution XPS spectrum of Ni 2p shows two spin-orbit peaks at 856.1 and 873.8 eV, attributed to Ni 2p3/2 and Ni 2p1/2 of oxidized Ni.

    “The high-resolution XPS spectrum of Ni 2p of the S,P-(Ni,Mo,Fe)OOH in Fig. 4d shows two spin-orbit peaks at 856.1 and 873.8 eV, which were attributed to the Ni 2p3/2 and Ni 2p1/2 of the oxidized Ni, respectively [38].”

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Authors
Li, S., Xi, C., Jin, Y.-Z., Wu, D., Wang, J.-Q., Liu, T., Wang, H.-B., Dong, C.-K., Liu, H., Kulinich, S. A., & Du, X.-W.
Affiliations
  • Tianjin University (CN)
  • Institute of New Energy Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
  • Tokai University (JP)
Corresponding author
  • Liu, Hui
  • Kulinich, Sergei A.
  • Du, Xi-Wen
Venue
ACS Energy Letters
Published
2019-07-03
Volume
4
Issue
8
Pages
1823-1829
ISSN
2380-8195 (ISSN-L)
OpenAlex
W2955277063
Cited by
182
References
40
Citations by year
2026: 5 · 2025: 17 · 2024: 24 · 2023: 35 · 2022: 36 · 2021: 38 · 2020: 24 · 2019: 3
FWCI
5.37
Type
journal article
Language
en
Open access
closed
Locations
ACS Energy Letters (publishedVersion)
Funders
National Natural Science Foundation of China (51671141, 51471115, 51871160)
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 › Materials Science › Materials Chemistry › Layered Double Hydroxides Synthesis and Applications
Keywords
overall water splitting, bifunctional electrocatalysts, hydrogen evolution reaction, oxygen evolution reaction, iridium doping, water dissociation, charge density, bridging oxygen, low overpotential

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