Self-organization of nanostructure by dealloying of intermetallic compounds for creating novel catalytic function

2014 Fiscal Year Final Research Report

• Project/Area Number: 23246117
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Tohoku University
• Principal Investigator: TSAI anpang 東北大学, 多元物質科学研究所, 教授 (90225681)
• Co-Investigator(Kenkyū-buntansha): KAMEOKA Satoshi 東北大学, 多元物質科学研究所, 准教授 (60312823) ; FUJITA Nobuhisa 東北大学, 多元物質科学研究所, 助教 (70431468) ; NISHIMURA Chikashi 独立行政法人物質・材料研究機構, 環境・エネルギー材料部門・水素利用材料ユニット合金触媒材料グループ, ユニット長 (20344434)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 金属間化合物 / リーチング / 酸化物 / 還元 / ナノ組織

Outline of Final Research Achievements

We have studied microstructure and catalytic properties for leaching Al-base intermetallic compounds. It has been clear the microstructure after leaching is dominated by oxidation ability of the metals formed intermetallic compounds with Al. A lamellar Fe3O4/Pt/Fe3O4 prepared by leaching Al-Pt-Fe alloy exhibited significant catalytic activity and selectivity upon steam reforming of methanol (SRM). The Pt and Fe3O4 were primarily responsible for the catalysis of the decomposition of methanol and water gas shift reaction, respectively. These two reactions work together in a complementary way to facilitate the overall SRM reaction. We demonstrate that a composite structure is available to couple two separate reactions to obtain a new catalytic function. We developed Pt/Fe3O4 catalyst with high activity upon CO oxidation, prepared by leaching an Al-Fe-Pt alloy with a minute amount of Pt and a new process to synthesize a composite catalyst Cu/CeO2/Ag by oxidation of amorphous alloy.

Free Research Field

金属材料