Development of self-organized nanoporous metal for exhaust-gas catalyst

• Project/Area Number: 25708036
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Inorganic industrial materials
• Research Institution: Tohoku University
• Principal Investigator: Fujita Takeshi 東北大学, 原子分子材料科学高等研究機構, 准教授 (90363382)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥25,350,000 (Direct Cost: ¥19,500,000、Indirect Cost: ¥5,850,000); Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000); Fiscal Year 2013: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
• Keywords: 多孔質金属 / 排ガス触媒 / 電子顕微鏡 / ナノポーラス金属 / 透過電子顕微鏡 / 触媒 / CO酸化 / NO還元

Outline of Final Research Achievements

①Using high-voltage transmission electron microscope (TEM) equipped with a gas environmental cell for in-situ observation, we have observed changing nano structure of nanoporous Au at atomic scale, and found that surface diffusion was the major degradation factor. The plane defects such as twins were found to be effective to suppress the surface diffusion.
②By selective etching Mn from a CuNiMn solid-solution alloy, we have developed advanced exhaust-gas catalysts without noble metals and rare-earth elements. The microstructure showed unique nano-architectures that are durable against long-term duration test at high temperature. The in-situ TEM successfully captured microstucture changes induced by NO reduction reaction.

Research Products

• [Journal Article] Earth-Abundant and Durable Nanoporous Catalyst for Exhaust-Gas Conversion (2016)
  • Author(s): T. Fujita, H. Abe, T. Tanabe, Y. Ito, T. Tokunaga, S. Arai, Y. Yamamoto, A. Hirata, M. W. Chen
  • Journal Title: Advanced Functional Materials Volume: 26 Issue: 10 Pages: 1609-1616
  • DOI: 10.1002/adfm.201504811
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Nanoporous Metal Papers for Scalable Hierarchical Electrode (2015)
  • Author(s): T. Fujita, Y. Kanoko, Y. Ito, L. Y. Chen, A. Hirata, H. Kashani, O. Iwatsu, M. W. Chen
  • Journal Title: Advanced Science Volume: 2 Issue: 8 Pages: 1500086-1500086
  • DOI: 10.1002/advs.201500086
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Environment-Sensitive Thermal Coarsening of Nanoporous Gold (2015)
  • Author(s): S. Kuwano-Nakatani, T. Fujita, K. Uchisawa, D. Umetsu, Y. Kase, Y. Kowata, K. Chiba, T. Tokunaga, S. Arai, Y. Yamamoto, N. Tanaka, M. W. Chen
  • Journal Title: MATERIALS TRANSACTIONS Volume: 56 Issue: 4 Pages: 468-472
  • DOI: 10.2320/matertrans.MF201403
  • NAID: 130005129264
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Atomic Observation of Catalysis-Induced Nanopore Coarsening of Nanoporous Gold (2014)
  • Author(s): T. Fujita, T. Tokunaga, L. Zhang, D. W. Li, L. Y. Chen, S. Arai, Y. Yamamoto, A. Hirata, N. Tanaka, Y. Ding, M. W. Chen
  • Journal Title: Nano Letters Volume: 14 Issue: 3 Pages: 1172-1177
  • DOI: 10.1021/nl403895s
  • Peer Reviewed
• [Presentation] Earth-abundant nanoporous metal catalysts for exhaust-gas conversion (2015)
  • Author(s): 藤田武志
  • Organizer: The International Chemical Congress of Pacific basin societies 2015 (Pacifichem 2015)
  • Place of Presentation: Hawaii (USA)
  • Year and Date: 2015-12-15
  • Int'l Joint Research
• [Presentation] Dealloyed Nanoporous Metals for Green Application (2015)
  • Author(s): 藤田武志
  • Organizer: International Conference on Functional Materials for Frontier Energy Issues (ICFMFE 2015)
  • Place of Presentation: Novosibirsk (Russia)
  • Year and Date: 2015-10-01
  • Int'l Joint Research / Invited
• [Presentation] 貴金属・希土類元素フリーの排ガス触媒の開発 (2015)
  • Author(s): 藤田武志
  • Organizer: 第157回日本金属学会
  • Place of Presentation: 九州大学（福岡県・福岡市）
  • Year and Date: 2015-09-16
• [Presentation] Dealloyed Nanoporous Metals for Green Application (2015)
  • Author(s): 藤田武志
  • Organizer: 4th International Symposium on Energy Challenges & Mechanics –working on small scales (ICM4)
  • Place of Presentation: Aberdeen (Scotland)
  • Year and Date: 2015-08-11
  • Int'l Joint Research / Invited
• [Presentation] Dealloyed Nanoporous Metals for Catalytic Application (2015)
  • Author(s): 藤田武志
  • Organizer: Amorphous and Nanostructured Materials (ISMANAM2015)
  • Place of Presentation: Paris (France)
  • Year and Date: 2015-07-13
  • Int'l Joint Research / Invited
• [Presentation] ナノポーラス金属ペーパーの開発 (2015)
  • Author(s): 藤田武志、鹿子泰宏、伊藤良一、陳明偉
  • Organizer: 第156回日本金属学会
  • Place of Presentation: 東京大学（東京都・目黒区）
  • Year and Date: 2015-03-18
• [Presentation] In-situ TEM observation of nanoporous gold catalyst (2015)
  • Author(s): 藤田武志
  • Organizer: the International Symposium on “New Movements of Electron Microscopy for the Next Generation”
  • Place of Presentation: 名古屋大学(愛知県・名古屋市）
  • Year and Date: 2015-03-05
  • Invited
• [Presentation] TEM observation of Nano Porous Gold in Reaction Environment (2014)
  • Author(s): 藤田武志
  • Organizer: Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014)
  • Place of Presentation: Hawaii (USA)
  • Year and Date: 2014-12-07
  • Int'l Joint Research / Invited
• [Presentation] In-situ TEM observation of catalytic nanoporous gold (2014)
  • Author(s): 藤田武志
  • Organizer: First International Symposium on Nanoporous Materials by Alloy Corrosion
  • Place of Presentation: Lake Bostal (Germany)
  • Year and Date: 2014-09-28
  • Int'l Joint Research / Invited
• [Presentation] Nanoporous metal catalysts for exhaust-gas transformation (2014)
  • Author(s): 藤田武志
  • Organizer: RIMS International Conference:“Mathematical Challenge to a New Phase of Materials Science”
  • Place of Presentation: 京都大学（京都府・京都市）
  • Year and Date: 2014-08-04
  • Int'l Joint Research / Invited
• [Presentation] In-situ observation of catalytic nanoporous gold (2014)
  • Author(s): 藤田武志
  • Organizer: TMU International Kick Off Workshop for the Research Center for Gold Chemistry
  • Place of Presentation: 首都大学東京（東京都・八王子市）
  • Year and Date: 2014-05-14
  • Int'l Joint Research / Invited
• [Presentation] In-situ observation of nanoporous gold catalyst (2013)
  • Author(s): 藤田 武志
  • Organizer: 日本顕微鏡学会第69回学術講演会
  • Place of Presentation: 大阪府吹田市、ホテル阪急エキスポパーク
  • Invited
• [Presentation] ナノポーラス金のＣＯ酸化反応におけるその場電子顕微鏡観察 (2013)
  • Author(s): 藤田 武志, 陳 明偉, 徳永 智春, 山本 悠大, 荒木 重勇, 田中 信夫
  • Organizer: 第153回日本金属学会秋期大会
  • Place of Presentation: 金沢市、金沢大学角間キャンパス
• [Presentation] 電子顕微鏡法によるナノポーラス金属表面触媒反応機構の解明 (2013)
  • Author(s): 藤田 武志
  • Organizer: 2013 年真空・表面科学合同講演会
  • Place of Presentation: つくば市、つくば国際会議場
  • Invited
• [Presentation] Catalytic origins of nanoporous gold (2013)
  • Author(s): Takeshi Fujita
  • Organizer: International Symposium on EcoTopia Science 2013 (ISETS ’13)
  • Place of Presentation: 名古屋市、名古屋大学
  • Invited
• [Book] 化学 2016年6月号 (2016)
  • Author(s): 藤田武志
  • Total Pages: 5
  • Publisher: 化学同人
• [Book] 触媒の設計・反応制御事例集 (2013)
  • Author(s): 藤田 武志 他
  • Total Pages: 827
  • Publisher: 技術情報協会
• [Book] 次世代蓄電池の【最新】材料技術と性能評価 (2013)
  • Author(s): 藤田 武志 他
  • Total Pages: 829
  • Publisher: 技術情報協会
• [Patent(Industrial Property Rights)] 多孔質金属およびその製造方法並びに蓄電装置 (2015)
  • Inventor(s): 藤田武志、陳明偉、伊藤良一、陳廬陽、田中茂雄、鹿子泰宏
  • Industrial Property Rights Holder: 東北大学、太盛工業株式会社
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2015-051416
  • Filing Date: 2015-03-13
• [Patent(Industrial Property Rights)] 多孔質ニッケル合金化合物及び触媒 (2013)
  • Inventor(s): 藤田 武志、陳 明偉、阿部 英樹、田邊 豊和
  • Industrial Property Rights Holder: 東北大学、物質・材料研究機構
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2013-224722
  • Filing Date: 2013-10-29