【公開日：2024.07.25】【最終更新日：2024.06.22】
課題データ / Project Data
課題番号 / Project Issue Number
23NU0202
利用課題名 / Title
Electrochemical CO2 reduction
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）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
触媒材料/ Catalyst materials,電極材料/ Electrode material,電子分光/ Electron spectroscopy
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)
Sirisomboonchai Suchada
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）-
利用した主な設備 / Equipment Used in This Project
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
In this study, we are characterizing catalysts for CO2 utilization applications using platinum metal catalysts loaded on different support materials.
実験 / Experimental
The following scientific equipment was used for analysis: the NU-207 X-ray photoelectron spectrometer (Thermo Fisher Scientific) and ESCALAB250Xi were used to study the elemental composition and electronic structure.
結果と考察 / Results and Discussion
X-ray photoelectron spectroscopy (XPS) was used to analyze the surface proportions and chemical species of the catalysts. The 1 wt.-% Pt/ZrO2 (Figure .1 )was analyzed in its fresh state, as well as after reactions namely as upflow, midflow, and downflow. The O1s species was deconvoluted into two peaks at 534.1 eV and 536 eV, which corresponded to surface lattice oxygen (Olatt) and surface adsorbed oxygen (Oads) of ZrO2. Upon examining the energy region of Pt 4f core levels in both the fresh and flow reaction states of the catalyst, two components were revealed. The freshly prepared catalyst after deconvoluting into two components shows a core level Pt 4f emission positioned at 75.3 eV, indicating a Pt2+ oxidation state. In contrast, the second component at 78.1 eV was attributed to Pt4+. The ZrO2 presents Zr 3p binding energy peak at 337.6 eV and 351 eV indicated to Zr 3p3/2 and Zr 3p1/2, respectively. From the results can see that after the reaction, the corresponding intensity peak was reduced. From Figure 2, the intense photoemission from the XPS spectra of 1 wt.-% Pt/Al2O3 overshadowed the Al 2p and Pt 4f energy regions. Therefore, instead of analyzing the Al 2p and Pt 4f species, we focused on analyzing the Al 2s species. The intensity of the binding energy of Al 2s decreased after the reaction. The fresh catalyst was divided into three components of Pt and Al, respectively. Following a similar trend with Al 2s, the intensity of the binding energy of the two components of the fresh catalyst at binding energies 76.2 and 79.1 attributed to Pt2+ and Pt4+ at lower binding energies decreased after the reaction. Additionally, the Pt2+ species disappeared after the reaction. The O1s species representing Al2O3 was divided into two peaks at 535 eV and 537 eV. These peaks corresponded to metal-oxygen bonding (OAl-O) and oxygen vacancy (Ovac).
図・表・数式 / Figures, Tables and Equations
Figure 1. XPS spectra of 1 wt.-% Pt/ZrO2 catalyst (A) O1s, (B) Zr 3p and (C) Pt 4f.
Figure 2. XPS spectra of 1 wt.-% Pt/Al2O3 catalyst (A) O1s, (B) Al 2s and (C) Al 2p & Pt 4f.
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
The equipment ID NU-228 and NU-205 are not be used in 2023 fiscal year.
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.
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