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Boosting production of formic acid from carbon dioxide electroreduction via high-entropy material
http://hdl.handle.net/10129/0002000485
http://hdl.handle.net/10129/00020004852b57b167-4fcd-4e96-94e1-5c7160ad1538
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Boosting production of formic acid from carbon dioxide electroreduction via high-entropy material (1.1 MB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||||
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| 公開日 | 2024-06-14 | |||||||
| タイトル | ||||||||
| タイトル | Boosting production of formic acid from carbon dioxide electroreduction via high-entropy material | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | High-entropy materials | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | Carbon dioxide reduction reaction | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | Formic acid production | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_bdcc | |||||||
| 資源タイプ | master thesis | |||||||
| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 著者 |
周, 奕帆
× 周, 奕帆
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| 著者別名 | ||||||||
| 姓名 | ZHOU, YIFAN | |||||||
| 言語 | en | |||||||
| 著者所属 | ||||||||
| 言語 | ja | |||||||
| 値 | 弘前大学大学院地域共創科学研究科 | |||||||
| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Excessive carbon dioxide emissions have brought about serious resource, environmental, and climate issues. Therefore, converting CO2 into valuable chemical fuels has attracted increasing research attention. As one of the most attractive CO2 reduction products, formic acid (HCOOH) is widely considered an ideal hydrogen carrier. Due to intense competitive hydrogen evolution reaction (HER) in aqueous media, high applied potential as well as current density often leads to low Faradaic efficiency (FE). Therefore, achieving a low-cost, environmentally friendly, and highly active catalyst to promote the generation of HCOOH by reducing CO2 in aqueous solutions with high current density and FE is of great interest but remains a challenge. Additionally, the carbon dioxide reduction reaction is always combined with the oxygen evolution reaction (OER), therefore, the development of efficient OER electrocatalysts is also impotent and sometimes it becomes the main obstacle to affect the efficiency of overall electrochemical process. This study focuses on the applications of high-entropy materials (HEMs) as either cathode or anode electrocatalysts in electrochemical CO2 reduction reaction (CO2RR). Here, HEMs always consist of five or more primary elements with close atomic ratios ranged from 5~35 at% for each. These usually offer adjustable composition, optimal grain size, stable crystalline structure, modified bond length and good electron cloud distribution, endowing HEMs long-term stability and unexcepted catalytic performance. Moreover, the complex components and structure of HEMs could result in discrepant atomic distribution and special binding sites, which can modulate the binding energy of reactants in a continuous form by varying elemental ratio. Unfortunately, as of now, there have been no reports of high-entropy catalysts that can be used to produce formic acid effectively from CO2. Herein, we chose Bi, In, Sn, Pb, and Cu five elements with carbon paper (CP) as the substrate and synthesized a catalyst by a simple hydrothermal method. XRD and elemental analysis confirmed the formation of a high-entropy structure of BiInSnPbCu on the CP. The obtainedelectrocatalyst exhibited high selectivity (over 80% Faradaic efficiency) and stability in electrochemical CO2RR to formic acid. Meanwhile, a kind of high-entropy precursor with a fusiform microstructure was used to prepare high entropy oxide (HEO) of (FeCoNiMnCu)Ox for OER. It is observed that, with thermal oxidization, the morphology of obtained high-entropy (FeCoNiMnCu)Ox was conversed to layered sphere-shape microstructure built by nanodots. This HEO also showed excellent stability with running continuously for 160 hours at current densities even exceeding 100 mA cm-2, which surpassed the performances of precious metal based electrocatalysts. Due to the excellent performances of the above obtained CO2RR and OER high entropy electrocatalysts, it is expected to combine them to achieve efficient CO2RR-OER electrolysis. |
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| 言語 | en | |||||||
| 著者版フラグ | ||||||||
| 言語 | ja | |||||||
| 値 | author | |||||||
| その他のタイトル | ||||||||
| その他のタイトル | 高エントロピー材料を用いた二酸化炭素電気化学還元による蟻酸の生産 | |||||||
| 言語 | ja | |||||||
| 資源タイプ | ||||||||
| 言語 | ja | |||||||
| 値 | Thesis | |||||||
| 学位名 | ||||||||
| 言語 | ja | |||||||
| 学位名 | 修士（地域共創工学） | |||||||
| 学位授与機関 | ||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||
| 学位授与機関識別子 | 11101 | |||||||
| 言語 | ja | |||||||
| 学位授与機関名 | 弘前大学 | |||||||
| 学位授与年度 | ||||||||
| 大見出し | 2023 | |||||||
| 言語 | ja | |||||||
| 学位授与年月日 | ||||||||
| 学位授与年月日 | 2024-03-22 | |||||||
| 学位授与番号 | ||||||||
| 学位授与番号 | 地共修47号 | |||||||
