Enhanced Hydrogen Evolution Reaction Performances of Ultrathin CuBi2O4 Nanoflakes

Semiconductor catalysts play a potential role for efficient electrocatalytic hydrogen production. In this work, copper bismuth oxide (CuBi2O4) nanostructures were synthesized via the coprecipitation method using two different Cu precursors: one is Cu(NO3)3·9H2O and the other is CuCl2. When using Cu(...

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Bibliographic Details
Published inInternational journal of energy research Vol. 2023; pp. 1 - 10
Main Authors Sekar, Sankar, Sadhasivam, Sutha, Nangai, E. Kayalvizhi, Saravanan, S., Kim, Deuk Young, Lee, Sejoon
Format Journal Article
LanguageEnglish
Published Bognor Regis Hindawi 20.05.2023
Hindawi Limited
Subjects
Bismuth oxides
Catalysts
Copper
Copper chloride
Coprecipitation
Cost analysis
Electrocatalysts
Electrodes
Electrolytes
Evolution
Hydrogen
Hydrogen evolution reactions
Hydrogen production
Morphology
Nanoparticles
Scanning electron microscopy
Spectrum analysis
Stainless steel
Voltammetry
Water splitting
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Summary:Semiconductor catalysts play a potential role for efficient electrocatalytic hydrogen production. In this work, copper bismuth oxide (CuBi2O4) nanostructures were synthesized via the coprecipitation method using two different Cu precursors: one is Cu(NO3)3·9H2O and the other is CuCl2. When using Cu(NO3)3·9H2O, the sample showed an interconnected and aggregated irregular spherical CuBi2O4 nanoparticle structure. On the other hand, the CuCl2-derived CuBi2O4 sample exhibited an interconnected ultrathin nanoflake structure. The CuBi2O4 nanoflakes displayed a higher electrochemically active surface area (160 cm2) than the CuBi2O4 nanoparticle (116 cm2). Accordingly, the CuBi2O4 nanoflakes revealed an excellent hydrogen evolution reaction performance with a low Tafel slope (117 mV/dec) and a small overpotential (384 mV at 10 mA/cm2 in 1 M KOH). These results specify that the CuBi2O4 nanoflakes are a suitable electrocatalyst material for high-performance water splitting.
ISSN:0363-907X
1099-114X
DOI:10.1155/2023/5038466