Rapid Formation of a Disordered Layer on Monoclinic BiVO 4

Co-Catalyst-Free Photoelectrochemical Solar Water Splitting

Jung Kyu Kim, Yoonjun Cho, Myung Jin Jeong, Ben Levy-Wendt, Dongguen Shin, Yeonjin Yi, Dong Hwan Wang, Xiaolin Zheng, Jong Hyeok Park

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A surface disordered layer is a plausible approach to improve the photoelectrochemical performance of TiO 2 . However, the formation of a crystalline disordered layer in BiVO 4 and its effectiveness towards photoelectrochemical water splitting has remained a big challenge. Here, we report a rapid solution process (within 5 s) that is able to form a disordered layer of a few nanometers thick on the surface of BiVO 4 nanoparticles using a specific solution with a controllable reducing power. The disordered layer on BiVO 4 alleviates charge recombination at the electrode–electrolyte interface and reduces the onset potential greatly, which in turn results in a photocurrent density of approximately 2.3 mA cm −2 at 1.23 V versus the reversible hydrogen electrode (RHE). This value is 2.1 times higher than that of bare BiVO 4 . The enhanced photoactivity is attributed to the increased charge separation and transfer efficiencies, which resolve the intrinsic drawbacks of bare BiVO 4 such as the short hole diffusion length of around 100 nm and poor surface oxygen evolution reactivity.

Original languageEnglish
Pages (from-to)933-940
Number of pages8
JournalChemSusChem
Volume11
Issue number5
DOIs
Publication statusPublished - 2018 Mar 9

Fingerprint

catalyst
Catalysts
Water
Photocurrents
water
recombination
Hydrogen
surface layer
electrode
hydrogen
Oxygen
Nanoparticles
Crystalline materials
oxygen
Electrodes
nanoparticle

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

Cite this

Kim, Jung Kyu ; Cho, Yoonjun ; Jeong, Myung Jin ; Levy-Wendt, Ben ; Shin, Dongguen ; Yi, Yeonjin ; Wang, Dong Hwan ; Zheng, Xiaolin ; Park, Jong Hyeok. / Rapid Formation of a Disordered Layer on Monoclinic BiVO 4 : Co-Catalyst-Free Photoelectrochemical Solar Water Splitting. In: ChemSusChem. 2018 ; Vol. 11, No. 5. pp. 933-940.
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Rapid Formation of a Disordered Layer on Monoclinic BiVO 4 : Co-Catalyst-Free Photoelectrochemical Solar Water Splitting. / Kim, Jung Kyu; Cho, Yoonjun; Jeong, Myung Jin; Levy-Wendt, Ben; Shin, Dongguen; Yi, Yeonjin; Wang, Dong Hwan; Zheng, Xiaolin; Park, Jong Hyeok.

In: ChemSusChem, Vol. 11, No. 5, 09.03.2018, p. 933-940.

Research output: Contribution to journalArticle

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AU - Kim, Jung Kyu

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AU - Levy-Wendt, Ben

AU - Shin, Dongguen

AU - Yi, Yeonjin

AU - Wang, Dong Hwan

AU - Zheng, Xiaolin

AU - Park, Jong Hyeok

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