Oh, Cheoulwoo Kim, Jiwon Lim, Chulwan Hwang, Yun Jeong Choi, Jae-Young Lee, Woong Hee Park, Jong Hyeok Oh, Hyung-Suk 2025-01-07T06:00:05Z 2025-01-07T06:00:05Z 2024-12-30 2025-05 0926-3373 https://pubs.kist.re.kr/handle/201004/151493 Global warming increases methane emissions from Arctic permafrost, which in turn reaccelerates global warming, creating a vicious cycle. Addressing this issue requires innovative solutions, such as electro-assisted methane partial oxidation (EMPO), which can provide an on-site facility for sustainable methane emission reduction in permafrost. In this study, a Co singe-atom catalyst was synthesized as an oxygen reduction reaction (ORR) catalyst that can be practically applied to stand-alone EMPO systems. To address performance degradation and cold weather freezing due to flooding of the electrodes, the hydrophobic polytetrafluoroethylene was mixed into a catalyst layer to regulate the microenvironment near cathodes. Furthermore, hydrophobic cathodes offer a pathway for nonpolar gases to increase the local concentration of methane. The enhanced local methane concentration, combined with an efficient ORR catalyst, yields 8 mmol g(cat)(-1) formic acid at a low potential bias. Remarkably, the EMPO system exhibits a consistent production even with air and is highly stable. This leads to possibility of on-site facility for methane conversion without external energy at thermokarst lakes. English Elsevier BV A sustainable strategy to reduce net methane emissions from thermokarst lakes by electrochemical methane partial oxidation Article 10.1016/j.apcatb.2024.124833 1 Applied Catalysis B: Environment and Energy, v.364 Applied Catalysis B: Environment and Energy 364 Y scie scopus 001370280300001 2-s2.0-85209678084 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article SELECTIVE OXIDATION OXYGEN SIZE SURFACE CARBON H2O2 IRON O-2 CH4 Electro-assisted methane partial oxidation (EMPO) Hydrophobic cathode Oxygen reduction reaction (ORR) Arctic permafrost Thermokarst lakes