| Summary: | 碩士 === 中原大學 === 化學研究所 === 104 === For the past few years, untilization of fossil fuel as main energy source caused the serious greenhouse effect. Scientists attempted to develop an alternative energy source to solve the problem and reduce the CO2 emission. In this work, we successfully synthesized dinuclear DNICs containing pyrazolate bridging ligands [(NO)2Fe(μ-RPyr)2Fe(NO)2] (Pyr = pyrazolate, R = Me, NH2). These complexes show two electron reversible redox interconversion between {Fe(NO)2}9-{Fe(NO)2}9, {Fe(NO)2}9-{Fe(NO)2}10 and {Fe(NO)2}10-{Fe(NO)2}10. We try as whether catalytic reduction of water into hydrogen and electrocatalytic reduction with CO2.
In the aqueous phase, our complexes have lower onset potential of electrocatalytic reduction of water -1.40 V(vs. SCE) and good stability in the prolonged electrolysis, and the Faraday efficiency of hydrogen generation reaches 100%. However, 1-Me and 1-NH2 can electrochemical react with CO2 in methanol, although about 80% of the electrons used in generating hydrogen when the process of electrolysis, we succeed reduce CO2 to formic, and the low conversion efficiency is the problem to be overcome in the future.
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