Choi Yeon-Bin, Kang Tae Wook, Kim Seo Young, Kim Seon Tae, Bae Byungseo, Kim Do Yun, Kwak Jin-Su, Kim Sun Woog
Electronic Convergence Materials Division, Optic & Electronic Component Materials Center, Korea Institute of Ceramic Engineering and Technology Jinju 52851 Republic of Korea
Advanced Resources Team, Yeongwol Industrial Promotion Agency 21-28 Palgoe 1 Nonggongdanji Yeongwolgun 26240 Republic of Korea.
RSC Adv. 2025 Jun 23;15(27):21229-21239. doi: 10.1039/d5ra02851e.
Catalysts, consisting of palladium supported on Ruddlesden-Popper (RP) type SrFeO perovskite oxides, were synthesized using co-precipitation and impregnation methods for efficient methane combustion at low temperatures. Achieving effective and stable methane combustion over SrFeO perovskite-based catalysts necessitates the suppression of the transformation of the RP-type SrFeO perovskite structure supporting active Pd species and the thermal reaction process. In this study, we demonstrated that the use of α-AlO as a supporting material in PdO/SrFeO /α-AlO catalysts significantly improved the surface oxygen species and oxygen vacancy density as well as the structural stability of the composite oxide catalyst. Among the catalysts prepared, the 13 wt% PdO/16 wt% SrFeO /α-AlO catalyst exhibited the highest catalytic activity for complete methane combustion at a low temperature of 300 °C.
采用共沉淀法和浸渍法合成了负载在Ruddlesden-Popper（RP）型SrFeO钙钛矿氧化物上的钯催化剂，用于低温下高效甲烷燃烧。要在基于SrFeO钙钛矿的催化剂上实现有效且稳定的甲烷燃烧，需要抑制负载活性钯物种的RP型SrFeO钙钛矿结构的转变以及热反应过程。在本研究中，我们证明在PdO/SrFeO /α-AlO催化剂中使用α-AlO作为载体材料可显著改善复合氧化物催化剂的表面氧物种和氧空位密度以及结构稳定性。在所制备的催化剂中，13 wt% PdO/16 wt% SrFeO /α-AlO催化剂在300℃低温下对甲烷完全燃烧表现出最高的催化活性。
