Size-dependent electrocatalytic activities of printed Co3O 4 films for a monolithic photovoltaic-electrolytic hydrogen generation system

Hyo Sang Jeon, Agung Nugroho, Jaehoon Kim, Honggon Kim, Byoung Koun Min

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

As an electrocatalyst in a monolithic PV-electrolytic cell for water splitting hydrogen generation Co3O4 films were prepared by a paste coating method using Co3O4 particles. Different sized Co3O4 particles with average diameters of 145.9, 63.3 and 36.5 nm were prepared using a supercritical hydrothermal synthesis method. Electrochemical properties with respect to the particle size in the film were investigated by evaluating overpotential, charge transfer resistance (Rct), and number of active sites (q). The relation between overpotential in water oxidation at 5 mA/cm2 and BET surface area showed a slope of -73.8 ± 6.6, implying strong particle size dependence on electrocatalytic activity. Moreover, the Rct and q values and the actual hydrogen evolution rate indicated that the electrocatalytic activity of Co3O4 is attributed to physical properties (e.g. particle size) of the film. Whereas, intrinsic single site activity of the film was not significantly changed with respect to the particle size in the film.

Original languageEnglish
Pages (from-to)10587-10592
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number17
DOIs
Publication statusPublished - 2011 Aug 1

Fingerprint

Hydrogen
Particle size
hydrogen
Electrolytic cells
Electrocatalysts
Hydrothermal synthesis
electrolytic cells
water splitting
Electrochemical properties
electrocatalysts
Charge transfer
Water
Physical properties
coating
physical properties
Coatings
Oxidation
charge transfer
slopes
oxidation

Keywords

  • CoO
  • Electrocatalysts
  • Electrochemical
  • Hydrogen
  • Particle size
  • Water splitting

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Size-dependent electrocatalytic activities of printed Co3O 4 films for a monolithic photovoltaic-electrolytic hydrogen generation system. / Jeon, Hyo Sang; Nugroho, Agung; Kim, Jaehoon; Kim, Honggon; Min, Byoung Koun.

In: International Journal of Hydrogen Energy, Vol. 36, No. 17, 01.08.2011, p. 10587-10592.

Research output: Contribution to journalArticle

Jeon, Hyo Sang ; Nugroho, Agung ; Kim, Jaehoon ; Kim, Honggon ; Min, Byoung Koun. / Size-dependent electrocatalytic activities of printed Co3O 4 films for a monolithic photovoltaic-electrolytic hydrogen generation system. In: International Journal of Hydrogen Energy. 2011 ; Vol. 36, No. 17. pp. 10587-10592.
@article{44ccf2bddd7c4bb3b0c8c0644c11d60e,
title = "Size-dependent electrocatalytic activities of printed Co3O 4 films for a monolithic photovoltaic-electrolytic hydrogen generation system",
abstract = "As an electrocatalyst in a monolithic PV-electrolytic cell for water splitting hydrogen generation Co3O4 films were prepared by a paste coating method using Co3O4 particles. Different sized Co3O4 particles with average diameters of 145.9, 63.3 and 36.5 nm were prepared using a supercritical hydrothermal synthesis method. Electrochemical properties with respect to the particle size in the film were investigated by evaluating overpotential, charge transfer resistance (Rct), and number of active sites (q). The relation between overpotential in water oxidation at 5 mA/cm2 and BET surface area showed a slope of -73.8 ± 6.6, implying strong particle size dependence on electrocatalytic activity. Moreover, the Rct and q values and the actual hydrogen evolution rate indicated that the electrocatalytic activity of Co3O4 is attributed to physical properties (e.g. particle size) of the film. Whereas, intrinsic single site activity of the film was not significantly changed with respect to the particle size in the film.",
keywords = "CoO, Electrocatalysts, Electrochemical, Hydrogen, Particle size, Water splitting",
author = "Jeon, {Hyo Sang} and Agung Nugroho and Jaehoon Kim and Honggon Kim and Min, {Byoung Koun}",
year = "2011",
month = "8",
day = "1",
doi = "10.1016/j.ijhydene.2011.06.006",
language = "English",
volume = "36",
pages = "10587--10592",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier Limited",
number = "17",

}

TY - JOUR

T1 - Size-dependent electrocatalytic activities of printed Co3O 4 films for a monolithic photovoltaic-electrolytic hydrogen generation system

AU - Jeon, Hyo Sang

AU - Nugroho, Agung

AU - Kim, Jaehoon

AU - Kim, Honggon

AU - Min, Byoung Koun

PY - 2011/8/1

Y1 - 2011/8/1

N2 - As an electrocatalyst in a monolithic PV-electrolytic cell for water splitting hydrogen generation Co3O4 films were prepared by a paste coating method using Co3O4 particles. Different sized Co3O4 particles with average diameters of 145.9, 63.3 and 36.5 nm were prepared using a supercritical hydrothermal synthesis method. Electrochemical properties with respect to the particle size in the film were investigated by evaluating overpotential, charge transfer resistance (Rct), and number of active sites (q). The relation between overpotential in water oxidation at 5 mA/cm2 and BET surface area showed a slope of -73.8 ± 6.6, implying strong particle size dependence on electrocatalytic activity. Moreover, the Rct and q values and the actual hydrogen evolution rate indicated that the electrocatalytic activity of Co3O4 is attributed to physical properties (e.g. particle size) of the film. Whereas, intrinsic single site activity of the film was not significantly changed with respect to the particle size in the film.

AB - As an electrocatalyst in a monolithic PV-electrolytic cell for water splitting hydrogen generation Co3O4 films were prepared by a paste coating method using Co3O4 particles. Different sized Co3O4 particles with average diameters of 145.9, 63.3 and 36.5 nm were prepared using a supercritical hydrothermal synthesis method. Electrochemical properties with respect to the particle size in the film were investigated by evaluating overpotential, charge transfer resistance (Rct), and number of active sites (q). The relation between overpotential in water oxidation at 5 mA/cm2 and BET surface area showed a slope of -73.8 ± 6.6, implying strong particle size dependence on electrocatalytic activity. Moreover, the Rct and q values and the actual hydrogen evolution rate indicated that the electrocatalytic activity of Co3O4 is attributed to physical properties (e.g. particle size) of the film. Whereas, intrinsic single site activity of the film was not significantly changed with respect to the particle size in the film.

KW - CoO

KW - Electrocatalysts

KW - Electrochemical

KW - Hydrogen

KW - Particle size

KW - Water splitting

UR - http://www.scopus.com/inward/record.url?scp=80051580528&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80051580528&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2011.06.006

DO - 10.1016/j.ijhydene.2011.06.006

M3 - Article

AN - SCOPUS:80051580528

VL - 36

SP - 10587

EP - 10592

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 17

ER -