Catalytic properties of Ni-Fe-Mg alloy nanoparticle catalysts for methanol decomposition

被引：30

作者：

Mitani, Haruka ^{[1
,2
]}

Xu, Ya ^{[2
]}

Hirano, Toshiyuki ^{[2
]}

Demura, Masahiko ^{[2
]}

Tamura, Ryuji ^{[1
]}

机构：

[1] Tokyo Univ Sci, Katsusika Ku, 6-3-1 Nijuku, Katsushika 1258585, Japan

[2] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

来源：

CATALYSIS TODAY | 2017年 / 281卷

关键词：

Ni-Fe-Mg alloy nanoparticles; Ni3Fe; Thermal plasma method; Methanol decomposition; Hydrogen production; ARC PLASMA EVAPORATION; AL NANOPARTICLES; FOILS; HYDROGENATION; FABRICATION;

D O I：

10.1016/j.cattod.2016.10.036

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Ni-25Fe and Ni-15Fe-13Mg (at.%) alloy nanoparticles were fabricated by a thermal plasma method, and their catalytic properties for methanol decomposition were examined in the 513-793 K temperature range. Both nanoparticles started showing activity for methanol decomposition above 593 K, with activity rapidly increasing with temperature. Ni-15Fe-13Mg showed much higher activity and less carbon deposition than Ni-25Fe. These results indicated that the addition of Mg in the Ni-Fe alloy significantly increased the activity, but suppressed carbon deposition. Characterization of the nanoparticles revealed that the Mg was segregated and a thin layer of MgO was formed on the surface of the nanoparticles. It is likely that the formation of MgO suppressed carbon deposition, but enhanced the activity by delaying the coarsening of nanoparticles during the reaction. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：669 / 676

页数：8

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