The Role of Support in Methane Reforming with CO2 over Rhodium Catalysts

Junji Nakamura, Keita Aikawa, Koichi Sato, Toshio Uchijima

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)


The catalytic activity of Rh/SiO2 for reforming of CH4 with CO2 was promoted by mixing physically with Al2O3, MgO, TiO2, K/SiO2. The order in Pco2 and Pch4 for CH4 + CO2 reaction over Rh/SiO2 were unity and - 0.6, respectively, indicating that CO2 dissociation was the rate-limiting step which was promoted by the mixing of metal oxides. In-situ FT-IR studies showed that dominant species formed by exposing Rh/SiO2 + Al2O3 to CO2 + H2 was formate at high temperatures above 400 K. The promotion in the activity of Rh/SiO2 by mixing with the metal oxides is ascribed to the rise of CO2 concentration in the vicinity of Rh particles, where CO2 is trapped as carbonate and/or formate on the surface of the metal oxides. The basic property of metal oxide surface may be responsible for the activity of CO2 dissociation.

ジャーナルStudies in Surface Science and Catalysis
出版ステータス出版済み - 1月 1 1994

!!!All Science Journal Classification (ASJC) codes

  • 触媒
  • 凝縮系物理学
  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • 材料化学


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