STRONG-INTERACTIONS IN SUPPORTED-METAL CATALYSTS
STRONG-INTERACTIONS IN SUPPORTED-METAL CATALYSTS
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DOI：
10.1126/science.211.4487.1121
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发表时间：
1981-01-01
期刊：
影响因子：
56.9
通讯作者：
HORSLEY, JA
中科院分区：
文献类型：
--
作者：
TAUSTER, SJ;FUNG, SC;HORSLEY, JA
许多商业上重要的催化剂是由分散在无机氧化物表面的小金属颗粒组成的。虽然在大多数情况下，金属和载体之间没有明显的相互作用，但在最近发现的一类负载金属催化剂中可以证明强键合。这些情况通常涉及分散在过渡金属氧化物上的第八族金属，其表面可以被还原成具有较低价的阳离子。光谱测量表明，一个电子从阳离子（如Ti3+或Nb4+）转移到金属颗粒上。这反过来又导致了金属颗粒的催化和化学吸附性能以及形态的深刻变化。
Many commercially important catalysts consist of small metal particles dispersed on inorganic oxide surfaces. Although in most cases there is no significant interaction between the metal and the support, strong bonding can be demonstrated in a recently discovered class of supported-metal catalysts. These cases typically involve group VIII metals dispersed on transition metal oxides whose surfaces can be reduced to form cations with lower valences. Spectroscopic measurements indicate that an electron is transferred from the cation (such as Ti3+or Nb4+) to the metal particle. This, in turn, leads to profound changes in the catalytic and chemisorption properties and the morphology of the metal particles.