Redox Treatment of Orthorhombic Mo29V11O112 and Relationships between Crystal Structure, Microporosity and Catalytic Performance for Selective Oxidation of Ethane

被引：50

作者：

Ishikawa, Satoshi ^{[1
,2
]}

Kobayashi, Daichi ^{[1
]}

Konya, Takeshi ^{[1
]}

Ohmura, Shunpei ^{[1
]}

Murayama, Toru ^{[1
]}

Yasuda, Nobuhiro ^{[3
]}

Sadakane, Masahiro ^{[4
]}

Ueda, Wataru ^{[1
]}

机构：

[1] Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0010021, Japan

[2] Japan Soc Promot Sci, Chiyoda Ku, Tokyo 1020083, Japan

[3] JASRI SPring8, Sayo, Hyogo 6795198, Japan

[4] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2015年 / 119卷 / 13期

关键词：

COMPLEX OXIDE CATALYSTS; M1; PHASE; HEPTAGONAL CHANNEL; LATTICE EXPANSION; MO; MO3VOX; MOLYBDENUM; VANADIUM; FIELD; DEHYDROGENATION;

D O I：

10.1021/jp512848w

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：

Redox treatments of an orthorhombic Mo29V11O112 catalyst (MoVO) were conducted and its crystal structure, microporosity, and catalytic activity were investigated. TPR and TG revealed that MoVO evolved two kinds of lattice oxygen (alpha-oxygen and beta-oxygen) from the structure by reduction treatment. In the early stage of reduction, alpha-oxygen was evolved from the structure, causing expansion of the micropore channel. With further reduction, the atoms in the pentagonal [Mo6O21](6) unit moved toward the micropore channel, resulting in a decrease in micropore size. Expansion of the micropore drastically increased catalytic activity for selective oxidation of ethane, but the activity was decreased by a reduction in the micropore channel size. Strong relationships were found between crystal structure, microporosity, and catalytic activity for selective oxidation of ethane.

引用

页码：7195 / 7206

页数：12

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