| Abstract Methane catalytic decomposition can produce COxfree hydrogen and carbon nanomaterials simultaneously, which has attracted extensive attention. Ni, Fe and Co based catalysts are commonly used in methane catalytic decomposition. However, the catalysts with single active component always show low activity and short lifetime. The catalyst design is important in improving the catalytic properties. Besides preparation methods and reaction conditions, introducing a second or third component may improve the catalyst performance due to the different interaction between the metals. This review summarizes the investigation on doped metal catalysts. The deactivation mechanism is firstly presented, active sites blocking and pore mouth plugging models are the alternative mechanisms, based on which the doped metal catalyst could be designed. The main achievements are introduced, which are divided into four parts due to the different roles of the doped elements, including the harmful elements which should be kept away. The functional mechanisms of the doped elements are summarized and the direction of future is pointed out. |
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2014, Vol. 31 
