利用報告書 / User's Report | ARIM Japan公式ホームページ_マテリアル先端リサーチインフラ

【公開日：2023.08.01】【最終更新日：2023.05.14】

課題データ / Project Data

課題番号 / Project Issue Number

22NU0078

利用課題名 / Title

電気化学的CO₂還元を高効率化する電極触媒

利用した実施機関 / Support Institute

名古屋大学

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）計測・分析/Advanced Characterization（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）-

キーワード / Keywords

InCu, ZnCu, InZnCu, electrodeposition, CO2 reduction,電子顕微鏡/Electron microscopy

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)

則永行庸

所属名 / Affiliation

名古屋大学

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

シリソンブーンチャイ　スチャダ

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

山本悠太

利用形態 / Support Type

（主 / Main）技術代行/Technology Substitution（副 / Sub）-

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

NU-103：高分解能透過電子顕微鏡システム

報告書データ / Report

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

Electrochemical CO₂ reduction reaction (CO₂RR) is one of the promising approaches to realize it as it can be driven by renewable electricity at ambient temperature and pressure. This research proposes to increase the faradic efficiency of CO₂ reduction products by using the electrochemical reduction technology with a well-designed nanostructure electrocatalyst. The catalysts were synthesized on copper foam substrate by electrodeposition method.

実験 / Experimental

The catalysts were synthesized on copper foam substrate (Purity 99%, diameter 1x1 cm², thickness 2 mm, porosity 50-98%, Pore Size: 0.1mm-1mm). The copper foam was oxidized (applied current) to in-situ grow copper nanowires directly on copper foam substrate. Then, growing Zn metal on Cu nanowire/Cu foam (CF)　and Indium (In) on ZnCu/CF via electrodeposition. The InCu/CF, ZnCu/CF and InZnCu/CF was calcination under 300゜C for 1h at air atmosphere.

結果と考察 / Results and Discussion

The insight structure of indium thin-layer cover Zn nanosheet was confirmed by HRTEM and STEM-EDS (JEM-2100F/HK). The image clearly shows that the indium thin-layer dispersed completely over Zn nanosheet structure growing on Cu/CF. (Figure 1C) Furthermore, Figure 1F present STEM-EDS mapping in the area of indium thin-layer on Zn nanosheet that indicated Indium well dispersed on Zn nanosheet.
Additionally, InCu and ZnCu catalysts (Figure 1A and 1B) presented indium and zinc growing on Cu/CF. The In thin-layer well dispersed on Cu(OH)₂ nanowires, while Zn nanosheets grew on Cu/CF.

図・表・数式 / Figures, Tables and Equations

Figure 1. (A-C) TEM images (A) InCu NW, (B) Zn nanosheet and (C) InZnCu. (D-F) STEM-EDS mapping of (D) InCu NW, (E) Zn nanosheet and (F) InZnCu.

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

The analysis was done by Dr. Yuta Yamamoto who is technical staff in HVEM Lab.

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)

Suchada Sirisomboonchai, Efficient CO₂ Electrochemical Reduction by a Robust Electrocatalyst Fabricated by Electrodeposition of Indium and Zinc over Copper Foam, ACS Applied Energy Materials, 5, 9846-9857(2022).
DOI: https://doi.org/10.1021/acsaem.2c01564

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

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