Kim, Hee Jun Kim, Sang Heon Kim, Sun-Woo Kim, Jin-Kyeom Cao, Chentian Kim, Yongchul Kim, Ungsoo Lee, Geunsik Choi, Jae-Young Oh, Hyung-Suk Song, Hyun-Cheol Choi, Won Jun Park, Hyesung Baik, Jeong Min 2024-01-19T10:31:17Z 2024-01-19T10:31:17Z 2023-01-13 2023-01 2211-2855 https://pubs.kist.re.kr/handle/201004/114159 This study reports a facile and economic method for LaFeO3 perovskite crystallization process at low temperature range from 300 degrees C to 500 degrees C and an outstanding oxygen evolution reaction (OER) catalyst based on inherent catalytically surface. As a key material for low temperature synthesis, cyanogel-peroxo-complex as a metastable molecular precursor was synthesized via ligand exchange using potassium cyanide solution to provide superoxo (O2-) ligand to Fe-CN-La gel structure, leading to a high degree of crystallinity with ideal ABO3 stoichiometry at low temperatures (400 -500 degrees C). Electrocatalysts based on LaFeO3 nanoparticles were fabricated, showing an outstanding OER performance with low overpotential of -438 mV at 100 mA/cm2 and small Tafel slope of 61 mV.dec-1 under alkaline conditions, better than commercialized available IrOx/C catalysts. Its OER performance is attributed to the inherent oxygen-deficient layer at the surface created at low temperature (300 degrees C). Long-term stability test shows no significant change (< 1%) in the potential during 50 h, indicating a high stability of such catalysts. English Elsevier BV Low-temperature crystallization of LaFeO3 perovskite with inherent catalytically surface for the enhanced oxygen evolution reaction Article 10.1016/j.nanoen.2022.108003 1 Nano Energy, v.105 Nano Energy 105 N scie scopus 000898680200004 2-s2.0-85142184668 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article THERMAL-DECOMPOSITION HYDROGEN-PEROXIDE EFFICIENT ELECTROCATALYSTS CATALYST WATER OXIDES NANOPARTICLES MECHANISMS PRECURSORS Inherent catalytically surface Oxygen evolution reaction Perovskite oxides Low temperature synthesis Cyanometallate coordination polymer