Heusler Alloys: A Group of Novel Catalysts

Takayuki Kojima; Satoshi Kameoka; An-Pang Tsai

doi:10.1021/acsomega.6b00299

Heusler Alloys: A Group of Novel Catalysts

ACS Omega. 2017 Jan 19;2(1):147-153. doi: 10.1021/acsomega.6b00299. eCollection 2017 Jan 31.

Authors

Takayuki Kojima^{1

2}, Satoshi Kameoka², An-Pang Tsai²

Affiliations

¹ Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki aza Aoba 6-3, Aoba-ku, Sendai 980-8578, Japan.
² Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan.

Abstract

In this study, we investigated the catalytic properties of various Heusler alloys for the hydrogenation of propyne and the oxidation of carbon monoxide. For propyne hydrogenation, Co₂FeGe alloy showed a higher activity than that of elemental Co, where neither Fe nor Ge showed any activity. This clearly indicates an alloying effect. For the oxidation of carbon monoxide, although most alloys showed a significant change in catalytic activity during measurement due to an irreversible oxidation of the alloy, Co₂TiSn alloy showed a very small change. The results indicate that the catalytic activity and stability of a Heusler alloy can be tuned by employing an appropriate set of elements.