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; Sam S. Yoon

doi:10.1016/j.jallcom.2017.07.260

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, Sam S. Yoon

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

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 language	English
Pages (from-to)	1138-1146
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	726
DOIs	https://doi.org/10.1016/j.jallcom.2017.07.260
State	Published - 5 Dec 2017

Keywords

Bismuth vanadate
Nanotextured-pillar
Photoanode
Photocurrent density
Water splitting

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jallcom.2017.07.260

Cite this

@article{d427c756f5884fc2adb74f43b6712072,

title = "Mo-doped BiVO4 nanotextured pillars as efficient photoanodes for solar water splitting",

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.",

keywords = "Bismuth vanadate, Nanotextured-pillar, Photoanode, Photocurrent density, Water splitting",

author = "Kim, {Min Woo} and Karam Kim and Ohm, {Tae Yoon} and Bhavana Joshi and Edmund Samuel and Swihart, {Mark T.} and Hyun Yoon and Hyunwoong Park and Yoon, {Sam S.}",

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year = "2017",

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doi = "10.1016/j.jallcom.2017.07.260",

language = "English",

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T1 - Mo-doped BiVO4 nanotextured pillars as efficient photoanodes for solar water splitting

AU - Kim, Min Woo

AU - Kim, Karam

AU - Ohm, Tae Yoon

AU - Joshi, Bhavana

AU - Samuel, Edmund

AU - Swihart, Mark T.

AU - Yoon, Hyun

AU - Park, Hyunwoong

AU - Yoon, Sam S.

PY - 2017/12/5

Y1 - 2017/12/5

N2 - 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.

AB - 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.

KW - Bismuth vanadate

KW - Nanotextured-pillar

KW - Photoanode

KW - Photocurrent density

KW - Water splitting

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