Co2 FeGe Heusler Alloy Nanoparticle Catalysts for Propyne Hydrogenation and Ammonia Decomposition

Takayuki Kojima; Yuki Nakaya; Souta Tate; Satoshi Kameoka; Shinya Furukawa

doi:10.1002/open.202300131

Co₂ FeGe Heusler Alloy Nanoparticle Catalysts for Propyne Hydrogenation and Ammonia Decomposition

ChemistryOpen. 2023 Nov;12(11):e202300131. doi: 10.1002/open.202300131.

Authors

Takayuki Kojima¹, Yuki Nakaya², Souta Tate¹, Satoshi Kameoka³, Shinya Furukawa^{2

4}

Affiliations

¹ Division of Chemistry and Materials, Faculty of Textile Science and Technology, Shinshu University, 3-15-1, Tokida, Ueda, Nagano, 386-8567, Japan.
² Institute for Catalysis, Hokkaido University, N21, W10, Sapporo, 001-0021, Japan.
³ Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan.
⁴ Present address: Division of Applied Chemistry, Graduate School of Engineering, Osaka University (Japan).

Abstract

Heusler alloys (X₂ YZ) can be a candidate for new catalysts as well as other intermetallic compounds. We previously found good catalytic properties of Co₂ FeGe for selective hydrogenation of alkynes and developed nanoparticles of Co₂ FeGe supported on SiO₂ . However, the average diameter of the nanoparticles was 23 nm, which is not small enough compared to those of state-of-the-art nanoparticle catalysts. In this study, we developed SiO₂ -supported Co₂ FeGe nanoparticles of <10 nm in diameter. A catalytic test for selective hydrogenation of propyne indicated a partial formation of sites with low selectivity including excess Co atoms. For ammonia decomposition, enhancement of turnover frequency was achieved by reducing the particle size.

Keywords: Heusler alloy; Heusler compound; intermetallic catalyst; intermetallic compound.

Grants and funding

JP19H02452/JSPS KAKENHI