【公開日：2025.06.10】【最終更新日：2025.04.18】

課題データ / Project Data

課題番号 / Project Issue Number

24NU0406

利用課題名 / Title

Catalysts for CO₂ conversion application

利用した実施機関 / Support Institute

名古屋大学 / Nagoya Univ.

機関外・機関内の利用 / External or Internal Use

内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)

技術領域 / Technology Area

【横断技術領域 / Cross-Technology Area】（主 / Main）物質・材料合成プロセス/Molecule & Material Synthesis（副 / Sub）-

【重要技術領域 / Important Technology Area】（主 / Main）革新的なエネルギー変換を可能とするマテリアル/Materials enabling innovative energy conversion（副 / Sub）次世代ナノスケールマテリアル/Next-generation nanoscale materials

キーワード / Keywords

電極材料/ Electrode material,ナノ粒子/ Nanoparticles

利用者と利用形態 / User and Support Type

利用者名（課題申請者）/ User Name (Project Applicant)

Suchada Sirisomboonchai

所属名 / Affiliation

名古屋大学大学院工学研究科

共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes

ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes

利用形態 / Support Type

（主 / Main）機器利用/Equipment Utilization（副 / Sub）,技術相談/Technical Consultation

利用した主な設備 / Equipment Used in This Project

NU-002：X線粉末回折装置
NU-004：走査型電子顕微鏡（SEM）

報告書データ / Report

概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)

This study presents catalysts for electrochemical CO₂ reduction applications and introduces a novel CO₂ conversion technology. Synthesized perovskite oxides have emerged as promising electrocatalysts due to their high ionic and electronic conductivity, stability, the ability to vary elements, and the alkaline earth effect, which enhances CO₂ intermediates. In this context, calcium (Ca) serves as the A-site in coordination with the copper (Cu) site, resulting in the formation of Ca₂CuO₃, which exhibits strong basic properties and exceptional CO₂ adsorption capabilities. The Ca₂CuO₃ catalyst demonstrates significant efficiency in converting CO₂ into ethylene (C₂H₄).

実験 / Experimental

The following scientific equipment was used for analysis: Smart Lab (Rikaku) 3K 1d/2dDSC, 9kW was used to characterize the composite of catalysts. The morphology structure of catalysts was observed using the NU-004 Scanning electron microscope (SEM), JOEL Japan (JSM-7500F).

結果と考察 / Results and Discussion

The powder X-ray diffraction (PXRD) patterns (Figure 1) of the Ca₂CuO₃ catalyst were analyzed at different heating rates of 2, 5, and 10^oC/min. The patterns corresponded to Ca₂CuO₃ (PDF No. 00-048-1478), confirming the successful formation of the catalyst. Moreover, the heating rate affected the crystallite size, which was calculated using the Scherrer equation: D_p = (0.94 Χ λ) / (β Χ Cosθ) where D_p is the average crystallite size, β is the line broadening in radians, θ is the Bragg angle, and λ is the X-ray wavelength. The results indicate that the heating rate plays a crucial role in determining the catalyst's crystallite size, which in turn affects its performance. The crystallite sizes obtained were 42.8 nm at 5^oC/min, 43.4 nm at 2^oC/min, and 45.2 nm at 10^oC/min (5^oC/min < 2^oC/min < 10^oC/min). Regarding the SEM results (Figure 2), the Ca₂CuO₃ perovskite synthesized by the solid-state method using CaCO₃ and CuO as reactants exhibited a uniform micro-scale composite structure.

図・表・数式 / Figures, Tables and Equations

Figure 1: XRD pattern of Ca₂CuO₃ catalyst at different heating rates 2, 5, 10^oC/min.

Figure 2: Morphology structure of Ca₂CuO₃ catalyst at heating rate 5^oC/min.

その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)

成果発表・成果利用 / Publication and Patents

論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)

口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.

1. スチャダ シリソンブーンチャイ、 則永行庸、"ペロブスカイト触媒を用いた二酸化炭素の電解還元によるエチレンへの転換" 、第６１回石炭科学会議プログラム　（高松）、2024年10月30日－10月31日

特許 / Patents

特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件