The synthesis of ammonia over a ruthenium single crystal

被引：75

作者：

Dahl, S ^{[1
]}

Taylor, PA

Tornqvist, E

Chorkendorff, I

机构：

[1] Tech Univ Denmark, Dept Phys, Ctr Atom Scale Mat Phys, DK-2800 Lyngby, Denmark

[2] Haldor Topsoe Res Labs, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF CATALYSIS | 1998年 / 178卷 / 02期

关键词：

D O I：

10.1006/jcat.1998.2168

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：

The ammonia synthesis rate over a ruthenium single crystal has been studied in the temperature range 598-898 K. Ammonia was synthesized from a stoichiometric (3H(2) : N-2) gas-mixture at a pressure of approximately 2 bar. The ammonia production rate was measured in two ways: with the reactor isolated (batch mode) and under constant gas flow (flow mode). The overall activation energy was measured to be 101 +/- 4 kJ/mol, and the turnover frequency was 2 x 10(-2) s(-1) at 673 K. After synthesis, the primary adsorbed species was nitrogen and there was evidence of hydrogen in the bulk of the crystal. (C) 1998 Academic Press.

引用

页码：679 / 686

页数：8

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