Oh, Joo Hyeng Kwon, Byeong Wan Cho, Jinwon Lee, Chan Hyun Kim, Min Kyeong Choi, Sun Hee Yoon, Sung Pil Han, Jonghee Nam, Suk Woo Kim, Jin Young Jang, Seung Soon Lee, Ki Bong Ham, Hyung Chul 2024-01-19T20:31:31Z 2024-01-19T20:31:31Z 2021-09-02 2019-04 0888-5885 https://pubs.kist.re.kr/handle/201004/120184 LaCrO3 perovskite and transition-metal (Co, Rh, Ir)-doped perovskite-based catalysts were fabricated using the Pechini method and applied to the dry reforming reaction of CH4 using CO2. One of the prepared perovskite-based catalysts, the LaCr0.95Ir0.05O3-delta catalyst, showed the highest CH4 conversion (81%) at 750 degrees C via the preactivation of the catalyst with H-2 gas. It also showed highly stable catalytic activity for 72 h without coke formation on the catalyst surface. Through X-ray photoelectron spectroscopy and transmission electron microscopy analyses, it is confirmed that the improved catalytic activity of the LaCr0.95Ir0.05O3-delta perovskite-based catalyst was based on the exsolution of Ir nanoparticles on the catalyst surface, which catalyzes the cleavage of the C-H bond for CH4. Density functional theory calculations revealed that the exsolution of a dopant Ir in LaCr0.95Ir0.05O3-delta is more exothermic with/without an oxygen vacancy conditin by 1.01 ev/0.43 eV, which suggests the agglomentation of Ir on the surface. English AMER CHEMICAL SOC Importance of Exsolution in Transition-Metal (Co, Rh, and Ir)-Doped LaCrO3 Perovskite Catalysts for Boosting Dry Reforming of CH4 Using CO2 for Hydrogen Production Article 10.1021/acs.iecr.8b05337 1 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.58, no.16, pp.6385 - 6393 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 58 16 6385 6393 N scie scopus 000466053500021 2-s2.0-85064812099 Engineering, Chemical Engineering Article FUEL-CELLS OXIDE CATALYSTS METHANE NICKEL TEMPERATURE COMBUSTION ETHANOL OXYGEN Exsolution Dry Reforming of CH4 Hydrogen Production