Pt-Ce0.9Cu0.1O2/activated carbon as highly active and stable HI decomposition catalyst

Wachirapun Punkrawee, Azusa Yamanaka, Junko Matsuda, Yukiko Mitoma, Noriko Nishiyama, Tatsumi Ishihara

Research output: Contribution to journalArticle

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Abstract

Effects of additives to Pt-CeO2/activated carbon (M563) catalysts on HI decomposition were studied. Among the additives studied, it was found that the addition of Cu to Pt-CeO2 is the most effective for increasing the catalytic activity to HI decomposition. On this catalyst, almost the equilibrium hydrogen iodide (HI) conversion was achieved at temperature higher than 573 K. Cu addition increased Pt dispersion by anchoring effects. Therefore, in spite of decreased Brunauer-Emmett-Teller surface area of the catalyst, dispersion of Pt was much increased by addition of Cu resulting in the increased HI decomposition activity and stability. Because formed I2 adsorbed on the catalyst at initial ca 20 hours, HI conversion was higher than that of the equilibrium one; however, after 20 hours, stable HI decomposition conversion that was almost the same with equilibrium conversion was achieved in the examined temperature range.

Original languageEnglish
Pages (from-to)1088-1097
Number of pages10
JournalInternational Journal of Energy Research
Volume42
Issue number3
DOIs
Publication statusPublished - Mar 10 2018

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Activated carbon
Decomposition
Hydrogen
Catalysts
Catalyst activity
Temperature

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Pt-Ce0.9Cu0.1O2/activated carbon as highly active and stable HI decomposition catalyst. / Punkrawee, Wachirapun; Yamanaka, Azusa; Matsuda, Junko; Mitoma, Yukiko; Nishiyama, Noriko; Ishihara, Tatsumi.

In: International Journal of Energy Research, Vol. 42, No. 3, 10.03.2018, p. 1088-1097.

Research output: Contribution to journalArticle

Punkrawee, Wachirapun ; Yamanaka, Azusa ; Matsuda, Junko ; Mitoma, Yukiko ; Nishiyama, Noriko ; Ishihara, Tatsumi. / Pt-Ce0.9Cu0.1O2/activated carbon as highly active and stable HI decomposition catalyst. In: International Journal of Energy Research. 2018 ; Vol. 42, No. 3. pp. 1088-1097.
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AU - Mitoma, Yukiko

AU - Nishiyama, Noriko

AU - Ishihara, Tatsumi

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AB - Effects of additives to Pt-CeO2/activated carbon (M563) catalysts on HI decomposition were studied. Among the additives studied, it was found that the addition of Cu to Pt-CeO2 is the most effective for increasing the catalytic activity to HI decomposition. On this catalyst, almost the equilibrium hydrogen iodide (HI) conversion was achieved at temperature higher than 573 K. Cu addition increased Pt dispersion by anchoring effects. Therefore, in spite of decreased Brunauer-Emmett-Teller surface area of the catalyst, dispersion of Pt was much increased by addition of Cu resulting in the increased HI decomposition activity and stability. Because formed I2 adsorbed on the catalyst at initial ca 20 hours, HI conversion was higher than that of the equilibrium one; however, after 20 hours, stable HI decomposition conversion that was almost the same with equilibrium conversion was achieved in the examined temperature range.

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