ケミカルループ法で化学原料製造と二酸化炭素再資源化を交互に実現

2025-04-08 早稲田大学

＜関連情報＞

• https://www.waseda.jp/inst/research/news/80491
• https://pubs.acs.org/doi/10.1021/acscatal.4c07737

Ni-Cu合金で修飾したIn2O3上での化学ループによるCO2分解と組み合わせたエタンの酸化的脱水素反応 Oxidative Dehydrogenation of Ethane Combined with CO2 Splitting via Chemical Looping on In2O3 Modified with Ni–Cu Alloy

Kosuke Watanabe,Takuma Higo,Koki Saegusa,Sakura Matsumoto,Hiroshi Sampei,Yuki Isono,Akira Shimojuku,Hideki Furusawa,and Yasushi Sekine
ACA Catalysis  Published: March 26, 2025
DOI:https://doi.org/10.1021/acscatal.4c07737

Abstract

Modified In₂O₃ has the potential to be a better oxygen storage material due to its readily reducible surface and abundant bulk lattice oxygen released with a marked valence change from In³⁺ to In⁰. This work describes that In₂O₃ modified with a Ni–Cu alloy supports a chemical looping system consisting of oxidative dehydrogenation of ethane and CO₂ splitting at the low temperature of 873 K with a large oxygen capacity (>4 wt %). This reaction system is achieved through dynamic changes between Ni–Cu binary alloy and Ni–Cu–In ternary alloy associated with the redox of indium species. Meticulous material screening, characterization, and theoretical calculations have revealed that the Ni–Cu alloy promotes the redox of In₂O₃ by activating ethane and by incorporating reduced indium species.