Mo-doped BiVO4 nanotextured pillars as efficient photoanodes for solar water splitting

Min Woo Kim, Karam Kim, Tae Yoon Ohm, Bhavana Joshi, Edmund Samuel, Mark T. Swihart, Hyun Yoon, Hyunwoong Park, Suk Goo Yoon

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We present electrospray-deposited nanotextured Mo-doped BiVO4 pillars with improved photoelectrochemical water splitting performance. The three-dimensional nanotextured Mo-BiVO4 pillars exhibit large interstitial spaces, which result in a high photocurrent. The doping of Mo at the optimal concentration (0.15%) results in a two-fold increase in the photocurrent density (PCD) (1.78 mA·cm−2 at 1.2 V versus Ag/AgCl) over that of pristine BiVO4. We attribute this increase in the PCD to increases in recombination time and in donor (electron) concentration owing to the doping with hexavalent Mo, as confirmed by Bode phase and Mott-Schottky analyses, respectively.

Original languageEnglish
Pages (from-to)1138-1146
Number of pages9
JournalJournal of Alloys and Compounds
Volume726
DOIs
Publication statusPublished - 2017 Dec 5

Keywords

  • Bismuth vanadate
  • Nanotextured-pillar
  • Photoanode
  • Photocurrent density
  • Water splitting

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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