摘要
文中用同位素交换（Ｄ_２─ＣＨ_４）反应来测量四种过渡金属负载型催化剂对甲烷的活化能力，并与Ｓｖｅｎｓｓｏｎ等从头算的计算结果作了比较，表明最有效活化甲烷分子的Ｃ─Ｈ键的金属是铑（Ｒｈ）．文中还测定了在甲烷部分氧化制合成气反应中，四个不同催化剂的催化活性与选择性，并与它们对甲烷的活化能力进行对比，可以看出甲烷部分氧化反应中，反应活性高的催化剂有效地活化甲烷，断裂Ｃ─Ｈ键，而且氘代甲烷产物分布以形成ＣＤ_４产物为主要成份．
The exchange reaction between methane and deuterium has been employed to measure the ability in dissociative activation of methane over four metal supported catalysts.The experimental results from these isotope exchange reactions have been compared with ab initio calculation results reported by Svensson and co-workers.It indicated that the most efficient catalyst for C-H scission in methane should be rhodium.The catalytic activity and selectivity in the partial oxidation of methane to synthesis gas over four catalysts have been measured and correlated with their ability of methane activation.It is demonstrated that catalysts showing high reactivity in the partial oxidation of methane activate methane strongly to give CD_4 as the major product in the deutero-methanes distribution.
出处
《分子催化》
EI
CAS
CSCD
1994年第4期271-277,共7页
Journal of Molecular Catalysis(China)
关键词
甲烷
负载型
催化剂
过渡元素
氧化
合成气
Methane,Supported catalyst,Transition metal,Oxidation,Isotope exchange reaction.
