Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid

Hee Young Park, Sung Jong Yoo, Soo Jin Kim, Sang Young Lee, Hyung Chul Ham, Yung Eun Sung, Soo Kil Kim, Seung Jun Hwang, Hyoung Juhn Kim, Eunae Cho, Dirk Henkensmeier, SukWoo Nam, Tae Hoon Lim, Jong Hyun Jang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Carbon-supported Se-modified-Ru catalysts (RuSey/C) were synthesized, and their phosphate adsorption characteristics were evaluated using electrochemical techniques and in-situ X-ray absorption spectroscopy (XAS). When phosphoric acid was added, the ORR activity of unmodified Ru/C decreased by 26.8% because the active sites were blocked by electrochemical adsorption, as confirmed by CV. However, for RuSey/C, the ORR activity was enhanced with phosphoric acid (RuSe1.56/C: 63.8%), which indicates that the kinetics at each site increased to compensate for the site blocking effect. The XAS results demonstrated that, for RuSey/C, phosphoric acid molecules or phosphate anions primarily interacted with Se atoms, and the oxidation state of Ru atoms decreased. Therefore, it was concluded that the enhanced ORR kinetics originated from the decreased oxygen binding energy with larger electrostatic repulsion.

Original languageEnglish
Pages (from-to)46-49
Number of pages4
JournalElectrochemistry Communications
Volume27
DOIs
Publication statusPublished - 2013 Feb 1
Externally publishedYes

Fingerprint

Electrocatalysts
Phosphoric acid
X ray absorption spectroscopy
Oxygen
Phosphates
Adsorption
Atoms
Kinetics
Binding energy
Anions
Electrostatics
Negative ions
Carbon
Oxidation
Catalysts
Molecules
phosphoric acid

Keywords

  • High temperature-PEMFC
  • Oxygen reduction reaction
  • Phosphoric acid
  • Se-modified-Ru catalyst

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Park, H. Y., Yoo, S. J., Kim, S. J., Lee, S. Y., Ham, H. C., Sung, Y. E., ... Jang, J. H. (2013). Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid. Electrochemistry Communications, 27, 46-49. https://doi.org/10.1016/j.elecom.2012.10.032

Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid. / Park, Hee Young; Yoo, Sung Jong; Kim, Soo Jin; Lee, Sang Young; Ham, Hyung Chul; Sung, Yung Eun; Kim, Soo Kil; Hwang, Seung Jun; Kim, Hyoung Juhn; Cho, Eunae; Henkensmeier, Dirk; Nam, SukWoo; Lim, Tae Hoon; Jang, Jong Hyun.

In: Electrochemistry Communications, Vol. 27, 01.02.2013, p. 46-49.

Research output: Contribution to journalArticle

Park, HY, Yoo, SJ, Kim, SJ, Lee, SY, Ham, HC, Sung, YE, Kim, SK, Hwang, SJ, Kim, HJ, Cho, E, Henkensmeier, D, Nam, S, Lim, TH & Jang, JH 2013, 'Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid', Electrochemistry Communications, vol. 27, pp. 46-49. https://doi.org/10.1016/j.elecom.2012.10.032
Park, Hee Young ; Yoo, Sung Jong ; Kim, Soo Jin ; Lee, Sang Young ; Ham, Hyung Chul ; Sung, Yung Eun ; Kim, Soo Kil ; Hwang, Seung Jun ; Kim, Hyoung Juhn ; Cho, Eunae ; Henkensmeier, Dirk ; Nam, SukWoo ; Lim, Tae Hoon ; Jang, Jong Hyun. / Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid. In: Electrochemistry Communications. 2013 ; Vol. 27. pp. 46-49.
@article{ba43617e5220485c9e2a83ad7bc3b58d,
title = "Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid",
abstract = "Carbon-supported Se-modified-Ru catalysts (RuSey/C) were synthesized, and their phosphate adsorption characteristics were evaluated using electrochemical techniques and in-situ X-ray absorption spectroscopy (XAS). When phosphoric acid was added, the ORR activity of unmodified Ru/C decreased by 26.8{\%} because the active sites were blocked by electrochemical adsorption, as confirmed by CV. However, for RuSey/C, the ORR activity was enhanced with phosphoric acid (RuSe1.56/C: 63.8{\%}), which indicates that the kinetics at each site increased to compensate for the site blocking effect. The XAS results demonstrated that, for RuSey/C, phosphoric acid molecules or phosphate anions primarily interacted with Se atoms, and the oxidation state of Ru atoms decreased. Therefore, it was concluded that the enhanced ORR kinetics originated from the decreased oxygen binding energy with larger electrostatic repulsion.",
keywords = "High temperature-PEMFC, Oxygen reduction reaction, Phosphoric acid, Se-modified-Ru catalyst",
author = "Park, {Hee Young} and Yoo, {Sung Jong} and Kim, {Soo Jin} and Lee, {Sang Young} and Ham, {Hyung Chul} and Sung, {Yung Eun} and Kim, {Soo Kil} and Hwang, {Seung Jun} and Kim, {Hyoung Juhn} and Eunae Cho and Dirk Henkensmeier and SukWoo Nam and Lim, {Tae Hoon} and Jang, {Jong Hyun}",
year = "2013",
month = "2",
day = "1",
doi = "10.1016/j.elecom.2012.10.032",
language = "English",
volume = "27",
pages = "46--49",
journal = "Electrochemistry Communications",
issn = "1388-2481",
publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid

AU - Park, Hee Young

AU - Yoo, Sung Jong

AU - Kim, Soo Jin

AU - Lee, Sang Young

AU - Ham, Hyung Chul

AU - Sung, Yung Eun

AU - Kim, Soo Kil

AU - Hwang, Seung Jun

AU - Kim, Hyoung Juhn

AU - Cho, Eunae

AU - Henkensmeier, Dirk

AU - Nam, SukWoo

AU - Lim, Tae Hoon

AU - Jang, Jong Hyun

PY - 2013/2/1

Y1 - 2013/2/1

N2 - Carbon-supported Se-modified-Ru catalysts (RuSey/C) were synthesized, and their phosphate adsorption characteristics were evaluated using electrochemical techniques and in-situ X-ray absorption spectroscopy (XAS). When phosphoric acid was added, the ORR activity of unmodified Ru/C decreased by 26.8% because the active sites were blocked by electrochemical adsorption, as confirmed by CV. However, for RuSey/C, the ORR activity was enhanced with phosphoric acid (RuSe1.56/C: 63.8%), which indicates that the kinetics at each site increased to compensate for the site blocking effect. The XAS results demonstrated that, for RuSey/C, phosphoric acid molecules or phosphate anions primarily interacted with Se atoms, and the oxidation state of Ru atoms decreased. Therefore, it was concluded that the enhanced ORR kinetics originated from the decreased oxygen binding energy with larger electrostatic repulsion.

AB - Carbon-supported Se-modified-Ru catalysts (RuSey/C) were synthesized, and their phosphate adsorption characteristics were evaluated using electrochemical techniques and in-situ X-ray absorption spectroscopy (XAS). When phosphoric acid was added, the ORR activity of unmodified Ru/C decreased by 26.8% because the active sites were blocked by electrochemical adsorption, as confirmed by CV. However, for RuSey/C, the ORR activity was enhanced with phosphoric acid (RuSe1.56/C: 63.8%), which indicates that the kinetics at each site increased to compensate for the site blocking effect. The XAS results demonstrated that, for RuSey/C, phosphoric acid molecules or phosphate anions primarily interacted with Se atoms, and the oxidation state of Ru atoms decreased. Therefore, it was concluded that the enhanced ORR kinetics originated from the decreased oxygen binding energy with larger electrostatic repulsion.

KW - High temperature-PEMFC

KW - Oxygen reduction reaction

KW - Phosphoric acid

KW - Se-modified-Ru catalyst

UR - http://www.scopus.com/inward/record.url?scp=84870346747&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84870346747&partnerID=8YFLogxK

U2 - 10.1016/j.elecom.2012.10.032

DO - 10.1016/j.elecom.2012.10.032

M3 - Article

VL - 27

SP - 46

EP - 49

JO - Electrochemistry Communications

JF - Electrochemistry Communications

SN - 1388-2481

ER -