Oxygen Release and Storage Property of Fe-Al Spinel Compounds: A Three-Way Catalytic Reaction over a Supported Rh Catalyst
Oxygen Release and Storage Property of Fe-Al Spinel Compounds: A Three-Way Catalytic Reaction over a Supported Rh Catalyst
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Fe-Al尖晶石化合物的释氧和储存特性：负载型 Rh 催化剂上的三元催化反应
DOI：
10.1021/acsami.1c01486
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Tanaka Tsunehiro
中科院分区：
文献类型：
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作者：
Fujita Kyoko;Asakura Hiroyuki;Hosokawa Saburo;Teramura Kentaro;Kobayashi Masaki;Fujita Koji;Tanaka Tsunehiro
我们评价了Rh-Fe/Al_2O_3催化剂在三效催化反应中的催化性能，偶然发现部分Fe物种溶解在γ-Al_2O_3载体上，作为储氧材料，调节催化活性中心周围的氧浓度，使其达到适合三效催化反应的水平。研究表明，Fe掺杂的γ-Al_2O_3在尖晶石结构的四面体（Td）位上通过Fe ~（2+）/Fe ~（3+）的氧化还原作用可逆地储存和释放氧，而不发生结构变形。尖晶石结构的金属氧化物Fe掺杂的γ-Al 2 O3可以作为储氧材料，这为开发不含稀有金属的储氧材料提供了新的机会。
We evaluated the catalytic performance of the Rh–Fe/Al2O3catalyst during a three-way catalytic reaction and found, by chance, that a part of Fe species was dissolved into the γ-Al2O3support and worked as an oxygen storage material, which adjusts the oxygen concentration around the catalytically active sites to a suitable level for three-way catalysis. In this study, we demonstrated that the Fe-doped γ-Al2O3can reversibly store and release oxygen by the redox of Fe2+/Fe3+at the tetrahedral (Td) site of the spinel structure without its structure deformation. The finding that a spinel-structured metal oxide, Fe-doped γ-Al2O3, could work as an oxygen storage material suggested a new opportunity for the development of oxygen storage materials without rare metals.