Pore-size control dynamics of nanoporous metals based on in-situ observations and atomic simulation

• Project/Area Number: 23360305
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Kyoto University
• Principal Investigator: MAMORU MABUCHI 京都大学, エネルギー科学研究科, 教授 (00358061)
• Co-Investigator(Kenkyū-buntansha): NAKANO Hiromi 豊橋技術科学大学, 研究基盤センター, 教授 (00319500)
• Co-Investigator(Renkei-kenkyūsha): HAKAMADA Masataka 京都大学, 大学院・エネルギー科学研究科, 准教授 (30462849)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000); Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2011: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
• Keywords: 金 / ナノポーラス / 脱合金化 / 高温その場観察 / 触媒 / ナノ材料 / 金属 / その場観察 / 第一原理計算 / 多孔質 / 電子顕微鏡 / 結晶成長

Research Abstract

In-situ transmission electron microscopic observations of nanoporous Au at high temperatures were conducted. Nonuniform coarsening occured even in an identical sample which had been fabricated by sputtering of Au-Ag and subsequent dealloying. Therefore it is suggested that the estimation of coarsening behavior is difficult because of this nonuniformness.
As a probe for surface area of nanoporous metals, catalytic properties of nanoporous Au for decoloration of organic dyes were examined. The reaction kinetic constant for decomposition of methyl orange was not proportional to the surface area estimated by cyclic voltammetry. Therefore the atomic defects on ligament surface of nanoporous Au serve as specific points for the catalytic reaction. The role of surface atomic defects is also supported by the electronic structure by atomic defects on the Au (111) surface simulated by first-principles calculations.

Research Products

• [Journal Article] Visible-light photocatalysis of ZnO deposited on nanoporous Au (2014)
  • Author(s): M. Hakamada, M. Yuasa, T. Yoshida, F. Hirashima, M. Mabuchi
  • Journal Title: Applied Physics A Volume: 114(4) Issue: 4 Pages: 1061-1066
  • DOI: 10.1007/s00339-014-8299-1
  • NAID: 120006596530
  • Peer Reviewed
• [Journal Article] Fabrication microstructure and properties of nanoporous Pd (2013)
  • Author(s): M. Hakamada and M. Mabuchi
  • Journal Title: Crit. Rev. Solid State Mater. Sci. Volume: (掲載可) Issue: 4 Pages: 262-285
  • DOI: 10.1080/10408436.2012.674985
  • Peer Reviewed
• [Journal Article] Catalytic decoloration of methyl orange solution by nanoporous metals (2012)
  • Author(s): M. Hakamada, F. Hirashima, M. Mabuchi
  • Journal Title: Catalysis Science and Technology Volume: 2 Issue: 9 Pages: 1814-1817
  • DOI: 10.1039/c2cy20218b
  • NAID: 120006596529
  • Peer Reviewed
• [Presentation] Properties and application of porous metals with micrometer-sized and nanometer-sized fine pores (2012)
  • Author(s): M. Hakamada, M. Mabuchi
  • Organizer: International Union of Materials Research Societies-Busan International Conference in Asia 2012 (IUMRS-ICA 2012)
  • Place of Presentation: Busan
  • Year and Date: 2012-08-27
• [Presentation] Electrochemical synthesis, properties and application of nanoporous metals (2011)
  • Author(s): M. Hakamada, J. Motomura, T. Yamamoto, F. Hirashima, M. Takahashi, M. Mabuchi
  • Organizer: International Symposium on Materials Science and Innovation for Sustainable Society Eco-Materials and Eco-Innovation for Global Sustainability (ECO-MATES 2011)
  • Place of Presentation: Osaka
  • Year and Date: 2011-11-29
• [Presentation] Electrochemical synthesis, properties and application of nanoporous metals (2011)
  • Author(s): M.Hakamada, J.Hotomura, T.Yamamoto, F.Hirashima, H.Takahashi, M.Mabuchi
  • Organizer: International Symposium on Materials Science and Innovation for Sustainable Society Eco-Materials and Eco-Innovation for Global Sustainability (ECO-MATES 2011)
  • Place of Presentation: 大阪大学(招待演講)
  • Year and Date: 2011-11-29
• [Presentation] Properties and application of porous metals with micrometer-sized and nanometer-sized fine pores
  • Author(s): Masataka Hakamada and Mamoru Mabuchi
  • Organizer: International Union of Materials Research Societies―International Conference in Asia 2012 (IUMRS-ICA 2012)
  • Place of Presentation: Busan
  • Invited
• [Presentation] Properties and application of nanoporous metals fabricated by dealloying
  • Author(s): Masataka Hakamada, Junichi Motomura, Satoshi Matsumura, Fumi Hirashima, Masaki Takahashi and Mamoru Mabuchi
  • Organizer: The 2012 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM’12)
  • Place of Presentation: Seoul
• [Presentation] 冷間圧延合金板の脱合金化によるナノポーラスPdの作製
  • Author(s): 袴田昌高、千野靖正、馬渕守
  • Organizer: 平成24年度塑性加工春季講演会
  • Place of Presentation: 小松
• [Presentation] 表面をナノポーラス化したPd-Co合金の電気的特性の水素応答性
  • Author(s): 袴田昌高、馬渕守
  • Organizer: 日本金属学会2012年秋期（第151回）大会
  • Place of Presentation: 松山
• [Presentation] ナノポーラスRuの創製とCO酸化触媒特性
  • Author(s): 本村隼一、袴田昌高、馬渕守
  • Organizer: 日本金属学会2012年秋期（第151回）大会
  • Place of Presentation: 松山
• [Presentation] Au/Cuナノコンポジットの力学特性
  • Author(s): 松村聡、袴田昌高、馬渕守
  • Organizer: 日本金属学会2012年秋期（第151回）大会
  • Place of Presentation: 松山
• [Presentation] 脱合金化法によるナノポーラス金属の創製と特性評価
  • Author(s): 袴田昌高、馬渕守
  • Organizer: 日本塑性加工学会ポーラス材料研究委員会第1回ポーラス材料研究討論会
  • Place of Presentation: 名古屋
• [Book] マクロおよびナノポーラス金属の開発最前線(第4章2節 脱合金化によるナノポーラス金属の創製) (2011)
  • Author(s): 袴田昌高・馬渕守
  • Publisher: シーエムシー出版
• [Book] マクロおよびナノポーラス金属の開発最前線(第4章2節脱合金化によるナノポーラス金属の創製) (2011)
  • Author(s): 袴田昌高・馬渕守
  • Total Pages: 8
  • Publisher: シーエムシー出版