Solution-processed yolk-shell-shaped WO3/BiVO4 heterojunction photoelectrodes for efficient solar water splitting

Bingjun Jin, Eunji Jung, Ming Ma, Sungsoon Kim, Kan Zhang, Jin Il Kim, Yongkeun Son, Jong Hyeok Park

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

The WO3/BiVO4 heterojunction is regarded as one of the most promising photoanode materials for photoelectrochemical (PEC) water splitting. To improve the solar water splitting efficiency, maximizing the solar light absorption efficiency in a photoelectrode is still a critical issue. Here, to achieve the aforementioned need, we designed and fabricated a WO3 film consisting of yolk-shell structured nanoparticles via solution processing. A thin BiVO4 layer with a smaller bandgap was coated onto the surface and inside the WO3 shells, providing a rationally designed inner space between the particles and the shell for better electrolyte accessibility. The yolk-shell-shaped PEC photoanode not only induces efficient light absorption but also plays an important role in electron collection from BiVO4 due to an enlarged contact area. The structure-PEC performance relationship was studied by combining ultraviolet-visible (UV-vis) absorption spectroscopy with a specular and diffuse reflectance technique, which illustrates that the yolk-shell morphology has a superior light absorption ability than conventional hollow or dense film structures. The pure yolk-shell (Y-WO3/BiVO4) photoanode possessed a photocurrent density of 2.3 mA cm-2 and achieved a highest value of ∼5.0 mA cm-2 after adding a Fe-Ni co-catalyst at a bias of 1.23 V vs. RHE under AM 1.5 illumination (100 mW cm-2).

Original languageEnglish
Pages (from-to)2585-2592
Number of pages8
JournalJournal of Materials Chemistry A
Volume6
Issue number6
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Light absorption
Heterojunctions
Water
Photocurrents
Absorption spectroscopy
Energy gap
Lighting
Electrolytes
Nanoparticles
Catalysts
Electrons
Processing
bismuth vanadium tetraoxide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Jin, Bingjun ; Jung, Eunji ; Ma, Ming ; Kim, Sungsoon ; Zhang, Kan ; Kim, Jin Il ; Son, Yongkeun ; Park, Jong Hyeok. / Solution-processed yolk-shell-shaped WO3/BiVO4 heterojunction photoelectrodes for efficient solar water splitting. In: Journal of Materials Chemistry A. 2018 ; Vol. 6, No. 6. pp. 2585-2592.
@article{f179bc2273f244e8b38e37349519d033,
title = "Solution-processed yolk-shell-shaped WO3/BiVO4 heterojunction photoelectrodes for efficient solar water splitting",
abstract = "The WO3/BiVO4 heterojunction is regarded as one of the most promising photoanode materials for photoelectrochemical (PEC) water splitting. To improve the solar water splitting efficiency, maximizing the solar light absorption efficiency in a photoelectrode is still a critical issue. Here, to achieve the aforementioned need, we designed and fabricated a WO3 film consisting of yolk-shell structured nanoparticles via solution processing. A thin BiVO4 layer with a smaller bandgap was coated onto the surface and inside the WO3 shells, providing a rationally designed inner space between the particles and the shell for better electrolyte accessibility. The yolk-shell-shaped PEC photoanode not only induces efficient light absorption but also plays an important role in electron collection from BiVO4 due to an enlarged contact area. The structure-PEC performance relationship was studied by combining ultraviolet-visible (UV-vis) absorption spectroscopy with a specular and diffuse reflectance technique, which illustrates that the yolk-shell morphology has a superior light absorption ability than conventional hollow or dense film structures. The pure yolk-shell (Y-WO3/BiVO4) photoanode possessed a photocurrent density of 2.3 mA cm-2 and achieved a highest value of ∼5.0 mA cm-2 after adding a Fe-Ni co-catalyst at a bias of 1.23 V vs. RHE under AM 1.5 illumination (100 mW cm-2).",
author = "Bingjun Jin and Eunji Jung and Ming Ma and Sungsoon Kim and Kan Zhang and Kim, {Jin Il} and Yongkeun Son and Park, {Jong Hyeok}",
year = "2018",
month = "1",
day = "1",
doi = "10.1039/c7ta08452h",
language = "English",
volume = "6",
pages = "2585--2592",
journal = "Journal of Materials Chemistry A",
issn = "2050-7488",
publisher = "Royal Society of Chemistry",
number = "6",

}

Solution-processed yolk-shell-shaped WO3/BiVO4 heterojunction photoelectrodes for efficient solar water splitting. / Jin, Bingjun; Jung, Eunji; Ma, Ming; Kim, Sungsoon; Zhang, Kan; Kim, Jin Il; Son, Yongkeun; Park, Jong Hyeok.

In: Journal of Materials Chemistry A, Vol. 6, No. 6, 01.01.2018, p. 2585-2592.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Solution-processed yolk-shell-shaped WO3/BiVO4 heterojunction photoelectrodes for efficient solar water splitting

AU - Jin, Bingjun

AU - Jung, Eunji

AU - Ma, Ming

AU - Kim, Sungsoon

AU - Zhang, Kan

AU - Kim, Jin Il

AU - Son, Yongkeun

AU - Park, Jong Hyeok

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The WO3/BiVO4 heterojunction is regarded as one of the most promising photoanode materials for photoelectrochemical (PEC) water splitting. To improve the solar water splitting efficiency, maximizing the solar light absorption efficiency in a photoelectrode is still a critical issue. Here, to achieve the aforementioned need, we designed and fabricated a WO3 film consisting of yolk-shell structured nanoparticles via solution processing. A thin BiVO4 layer with a smaller bandgap was coated onto the surface and inside the WO3 shells, providing a rationally designed inner space between the particles and the shell for better electrolyte accessibility. The yolk-shell-shaped PEC photoanode not only induces efficient light absorption but also plays an important role in electron collection from BiVO4 due to an enlarged contact area. The structure-PEC performance relationship was studied by combining ultraviolet-visible (UV-vis) absorption spectroscopy with a specular and diffuse reflectance technique, which illustrates that the yolk-shell morphology has a superior light absorption ability than conventional hollow or dense film structures. The pure yolk-shell (Y-WO3/BiVO4) photoanode possessed a photocurrent density of 2.3 mA cm-2 and achieved a highest value of ∼5.0 mA cm-2 after adding a Fe-Ni co-catalyst at a bias of 1.23 V vs. RHE under AM 1.5 illumination (100 mW cm-2).

AB - The WO3/BiVO4 heterojunction is regarded as one of the most promising photoanode materials for photoelectrochemical (PEC) water splitting. To improve the solar water splitting efficiency, maximizing the solar light absorption efficiency in a photoelectrode is still a critical issue. Here, to achieve the aforementioned need, we designed and fabricated a WO3 film consisting of yolk-shell structured nanoparticles via solution processing. A thin BiVO4 layer with a smaller bandgap was coated onto the surface and inside the WO3 shells, providing a rationally designed inner space between the particles and the shell for better electrolyte accessibility. The yolk-shell-shaped PEC photoanode not only induces efficient light absorption but also plays an important role in electron collection from BiVO4 due to an enlarged contact area. The structure-PEC performance relationship was studied by combining ultraviolet-visible (UV-vis) absorption spectroscopy with a specular and diffuse reflectance technique, which illustrates that the yolk-shell morphology has a superior light absorption ability than conventional hollow or dense film structures. The pure yolk-shell (Y-WO3/BiVO4) photoanode possessed a photocurrent density of 2.3 mA cm-2 and achieved a highest value of ∼5.0 mA cm-2 after adding a Fe-Ni co-catalyst at a bias of 1.23 V vs. RHE under AM 1.5 illumination (100 mW cm-2).

UR - http://www.scopus.com/inward/record.url?scp=85041960155&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041960155&partnerID=8YFLogxK

U2 - 10.1039/c7ta08452h

DO - 10.1039/c7ta08452h

M3 - Article

AN - SCOPUS:85041960155

VL - 6

SP - 2585

EP - 2592

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7488

IS - 6

ER -