化学
镍
催化作用
溶解
活化能
吸附
扩散
降水
金属
表面扩散
反应机理
机制(生物学)
无机化学
碳纤维
化学工程
物理化学
热力学
有机化学
材料科学
哲学
气象学
复合材料
工程类
物理
认识论
复合数
标识
DOI:10.1016/0021-9517(77)90087-2
摘要
Earlier studies of the mechanism of carbon formation on nickel are reviewed. A complex dependence of rate upon temperature is observed in many systems. Different explanations for the existence of a rate maximum and an apparent negative activation energy are discussed. The observations are shown to be best explained in terms of adsorption effects, although other effects may influence the magnitude of the observed activation energy. Another aspect of the mechanism is the method of transportation of metal particles with the surface of the growing carbon. Temperature driven dissolution-precipitation of carbon or surface migration of carbonaceous species appear less probable than a mechanism involving diffusion of carbon through nickel under a concentration gradient.
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