2019 Fiscal Year Final Research Report

Development of a chemical synthesis technique to prepare Cu-Co NWs

Research Project

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Project/Area Number	16K04891
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Nanomaterials chemistry
Research Institution	The University of Shiga Prefecture
Principal Investigator	Cuya Huaman Jhon Lehman 滋賀県立大学, 工学部, 研究員 (70727867)
Co-Investigator(Kenkyū-buntansha)	松本高利東北大学, 多元物質科学研究所, 助教 (50343041)
Project Period (FY)	2016-04-01 – 2020-03-31
Keywords	Alcohol Reduction / 1-heptanol / Oleylamine / Cu-Co / CO2 reduction reaction / Nanoparticles / Nanowires / Nanotubes
Outline of Final Research Achievements	Cu-Co nanotubes (NTs) and nanoparticles (NPs) have been successfully synthesized through alcohol reduction method and a mechanism formation was proposed. Parameters such as solvent, surfactant and metallic sources have been studied experimentally and chemical calculations. Theoretically, alcohols with long alkyl chain can reduced metals with low reduction potential such as Cu and Co. In this regard, 1-heptanol was suitable to produce Cu-Co NTs and NPs. Likewise, although oleylamine and the ratio Cl-/O2 play important role in the formation of NTS, the N2 flow rate and the mixture of metallic acetate/metallic chloride control the ratio Cl-/O2. The Cu-Co NTs exhibit a CO2-to-formate faradaic efficiency was four times higher than that of Cu-Co NPs. The high electrocatalytic properties of NTs was due to the presence of high Co oxide content on Cu-Co NT surface.
Free Research Field	Nanomaterials
Academic Significance and Societal Importance of the Research Achievements	（1）Cuベースの1次元NSの合成、それらの形成メカニズム、および寸法、組成を制御するパラメーターは、計算化学を使用して理論的に研究され、後で実験的に検証されてた。特に、還元剤と界面活性剤の選択は、計算化学から得られた結果に基づいて行われました。そして、合成実験は理論的結果に基づいて設計されました。2）この研究で開発された材料は、さらに改善を施せば、非汚染物質の生成物とエネルギーを生成することにより空気品質を向上させるためのCO2還元反応器の電極としての用途に検討できます。