Gu, Sangseo Oh, Hyung-Suk Choi, Jae-Wook Suh, Dong Jin Jae, Jungho Choi, Jungkyu Ha, Jeong-Myeong 2024-01-19T22:04:39Z 2024-01-19T22:04:39Z 2021-09-03 2018-07-25 0926-860X https://pubs.kist.re.kr/handle/201004/121137 The oxidative coupling of methane using silica-supported Na2WO4 (Na2WO4/SiO2) catalysts is observed by adjusting additives in order to understand the roles of additives and to design more efficient catalysts. By observing the effects of additives on the catalytic OCM activity of Na2WO4/SiO2 catalysts, the reducibility of metal additives, quantified by the standard reduction potentials, is observed to improve the methane conversion and olefin selectivity, indicating that the active sites of activating methane and dehydrogenating paraffin are identical. The supply of oxygen atoms from more easily reducible additives to tungsten oxide manipulate the OCM activity as described by the standard reduction potentials of the additives. The crystal and electronic structures of the catalysts depend on the additives, which can also be used to adjust the catalytic activity. English ELSEVIER SCIENCE BV GAS SHIFT REACTION RARE-EARTH NA2WO4/MN/SIO2 CATALYSTS C-2 HYDROCARBONS PERFORMANCE MGO MN/NA2WO4/SIO2 CONVERSION HYDROGEN BASICITY Effects of metal or metal oxide additives on oxidative coupling of methane using Na2WO4/SiO2 catalysts: Reducibility of metal additives to manipulate the catalytic activity Article 10.1016/j.apcata.2018.05.031 1 APPLIED CATALYSIS A-GENERAL, v.562, pp.114 - 119 APPLIED CATALYSIS A-GENERAL 562 114 119 scie scopus 000443630600013 2-s2.0-85048524329 Chemistry, Physical Environmental Sciences Chemistry Environmental Sciences & Ecology Article GAS SHIFT REACTION RARE-EARTH NA2WO4/MN/SIO2 CATALYSTS C-2 HYDROCARBONS PERFORMANCE MGO MN/NA2WO4/SIO2 CONVERSION HYDROGEN BASICITY Oxidative coupling of methane Additive Na2WO4 Standard reduction potential Olefin