Electrosynthesis, activation, and applications of nickel-iron oxyhydroxide in (photo-)electrochemical water splitting at near neutral condition

Shih Ching Huang, Chia Yu Lin

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

We present the anodic pulse-current electrosynthesis, structural characterization, and OER electrocatalytic properties of the pristine and anodically-pretreated nickel-iron oxyhydroxide borate thin films (Fe:Ni–Bi). In the electrosynthesis of Fe:Ni–Bi, OER kinetics was found to have great influence not only on the current efficiency for film deposition, but also on the surface morphology and crystal structure of the synthesized Fe:Ni–Bi. In addition, the Tafel analyses indicate that incorporating iron modified the OER mechanism and promoted the OER activity. Moreover, both the applied turnover (current) and electrolyte pH used in the anodic pretreatment of Fe:Ni–Bi have great influences on the OER activity of the pretreated Fe:Ni–Bi; the applied turnover rate decides the applied oxidative level and thus affects the extent of phase transformation of β-NiOOH to γ-NiOOH, whereas the solution pH for anodic pretreatment affects the electrochemically effective surface area. Finally, the developed electrosynthetic approach can effectively translate the high OER activity of Fe:Ni–Bi from a flat FTO substrate to a porous BiVO4 photoanode, facilitating the interfacial hole transfer and improving photostability of BiVO4.

原文English
文章編號134667
期刊Electrochimica Acta
321
DOIs
出版狀態Published - 2019 十月 20

All Science Journal Classification (ASJC) codes

  • 化學工程 (全部)
  • 電化學

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