CO-promoted low-temperature conversion of CH4 to hydrogen and carbon nanotubes on Nanocrystalline Cr-doped ferrite catalyst

被引：1

作者：

Sun, Xinhui ^{[1
]}

Damma, Devaiah ^{[1
]}

Cao, Zishu ^{[1
]}

Alvarez, Noe T. ^{[1
]}

Shanov, Vesselin ^{[1
]}

Arvanitis, Antonios ^{[1
]}

Smirniotis, Panagiotis G. ^{[1
]}

Dong, Junhang ^{[1
]}

机构：

[1] Univ Cincinnati, Dept Chem & Environm Engn, Cincinnati, OH 45221 USA

来源：

CATALYSIS COMMUNICATIONS | 2022年 / 169卷

关键词：

Methane; Catalytic decomposition; Doped ferrite; Hydrogen; Carbon nanotube; CHEMICAL-VAPOR-DEPOSITION; METHANE DECOMPOSITION; GROWTH; MODEL; DISPROPORTIONATION;

D O I：

10.1016/j.catcom.2022.106475

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Catalytic decomposition of methane (CDM) to H2 and multiwalled carbon nanotubes (MWCNTs) was achieved by a nanocrystalline Cr-doped ferrite (FeCr) catalyst at 500 degrees C and atmospheric pressure with minor cofed CO. The exothermic Boudouard reaction increased the temperature and H2 from CDM at catalyst surface that induced Fe2+ reduction to Fe0. The Fe0 clusters along with the CO-originated surface oxygens enabled transfer of C and H to sustain the surface CDM and CO reactions. The metallic Fe-enabled C transfer led to the formation of MWCNTs. The Cr6+/3+ dopants facilitated the Fe redox cycles and maintained surface oxygens for high catalytic activity.

引用

页数：11

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