纳米棒
非阻塞I/O
甲烷
催化作用
电化学
甲醇
化学工程
材料科学
无机化学
化学
纳米技术
电极
有机化学
工程类
物理化学
作者
Cheol-Ho Kim,Heewon Min,Jun-Min Kim,Jiwon Sul,Jiwoo Yang,Jun Hyuk Moon
标识
DOI:10.1016/j.apcatb.2022.122129
摘要
Electrochemical conversion is promising for selective partial oxidation of methane. We present a NiO/ZnO shell/core nanorod catalyst used to enhance electrochemical conversion. The built-in potential at the NiO/ZnO interface and the 1D morphology of the nanorods allow for fast charge transfer, thereby enhancing electrochemical methane conversion. We achieved a high ethanol production rate of 1084.2 μmol/gNiO/hr with a selectivity of 81 % for a 600-nm long NiO/ZnO nanorod catalyst. Mechanistic analyses with isotopic labeling reactions suggested ethanol production pathways involving generation of active oxygen by dissociative adsorption of the anionic CO32- oxidant, formation of methanol by methane activation, and coupling of deprotonated methanol and methane. Furthermore, we improved the ethanol yield by improving methane solubility in sulfolane cosolvent mixtures. We also demonstrated conversion with in situ generation of CO32- from a CH4/CO2 mixture.
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