Highly active and CO2 tolerant Ir nanocatalysts for H2/CO2 separation in electrochemical hydrogen pumps

Soo Jin Kim, Hee Young Park, Sang Hyun Ahn, Byung seok Lee, Hyoung Juhn Kim, EunAe Cho, Dirk Henkensmeier, SukWoo Nam, Sung Hyun Kim, Sung Jong Yoo, Jong Hyun Jang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Carbon-supported Pt nanoparticles have been widely used as electrocatalysts for electrochemical hydrogen pumps. However, Pt surfaces are susceptible to poisoning under CO2 atmosphere, and as a result, need greater applied cell voltages. Instead of Pt as an anode catalyst in electrochemical hydrogen pumps, we synthesized Ir-based catalysts and characterized them by XRD, XPS, TEM, and TGA. The electrochemical characteristics of the Ir catalysts were evaluated by a halfcell test, and their catalytic activities toward the hydrogen oxidation and hydrogen evolution reactions were evaluated by micro polarization analysis. The exchange current density of the Ir catalyst that was heat treated at 300°C was larger than that of commercial Pt. CO2 stripping analysis confirmed that the Ir catalyst was not affected by CO2, unlike the Pt catalyst. Focusing on H2 separation from H2/CO2 gas, an evaluation using a single-cell test indicated that the Ir catalyst performed better than the Pt catalyst.

Original languageEnglish
Pages (from-to)348-354
Number of pages7
JournalApplied Catalysis B: Environmental
Volume158-159
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Hydrogen
pump
catalyst
Pumps
hydrogen
Catalysts
Electrocatalysts
poisoning
density current
X-ray spectroscopy
transmission electron microscopy
Catalyst activity
Anodes
Current density
Carbon
X ray photoelectron spectroscopy
polarization
Gases
X-ray diffraction
Polarization

Keywords

  • Carbon capture and storage
  • Electrochemical hydrogen pump
  • Gas separation
  • Iridium catalyst

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

Cite this

Highly active and CO2 tolerant Ir nanocatalysts for H2/CO2 separation in electrochemical hydrogen pumps. / Kim, Soo Jin; Park, Hee Young; Ahn, Sang Hyun; Lee, Byung seok; Kim, Hyoung Juhn; Cho, EunAe; Henkensmeier, Dirk; Nam, SukWoo; Kim, Sung Hyun; Yoo, Sung Jong; Jang, Jong Hyun.

In: Applied Catalysis B: Environmental, Vol. 158-159, 01.01.2014, p. 348-354.

Research output: Contribution to journalArticle

Kim, SJ, Park, HY, Ahn, SH, Lee, BS, Kim, HJ, Cho, E, Henkensmeier, D, Nam, S, Kim, SH, Yoo, SJ & Jang, JH 2014, 'Highly active and CO2 tolerant Ir nanocatalysts for H2/CO2 separation in electrochemical hydrogen pumps', Applied Catalysis B: Environmental, vol. 158-159, pp. 348-354. https://doi.org/10.1016/j.apcatb.2014.04.016
Kim, Soo Jin ; Park, Hee Young ; Ahn, Sang Hyun ; Lee, Byung seok ; Kim, Hyoung Juhn ; Cho, EunAe ; Henkensmeier, Dirk ; Nam, SukWoo ; Kim, Sung Hyun ; Yoo, Sung Jong ; Jang, Jong Hyun. / Highly active and CO2 tolerant Ir nanocatalysts for H2/CO2 separation in electrochemical hydrogen pumps. In: Applied Catalysis B: Environmental. 2014 ; Vol. 158-159. pp. 348-354.
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AB - Carbon-supported Pt nanoparticles have been widely used as electrocatalysts for electrochemical hydrogen pumps. However, Pt surfaces are susceptible to poisoning under CO2 atmosphere, and as a result, need greater applied cell voltages. Instead of Pt as an anode catalyst in electrochemical hydrogen pumps, we synthesized Ir-based catalysts and characterized them by XRD, XPS, TEM, and TGA. The electrochemical characteristics of the Ir catalysts were evaluated by a halfcell test, and their catalytic activities toward the hydrogen oxidation and hydrogen evolution reactions were evaluated by micro polarization analysis. The exchange current density of the Ir catalyst that was heat treated at 300°C was larger than that of commercial Pt. CO2 stripping analysis confirmed that the Ir catalyst was not affected by CO2, unlike the Pt catalyst. Focusing on H2 separation from H2/CO2 gas, an evaluation using a single-cell test indicated that the Ir catalyst performed better than the Pt catalyst.

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