The reduction activity of nitrate and the formation of ammonium are mainly controlled by the diffusion limitation and the mass transfer of the reactants.
同时，催化剂的活性和选择性受到扩散限制和质量传输的影响。
Silicon is favorable to mass transfer and the limitation of movement of grain boundary.
硅的加入有利于传质和限制晶界移动；
Silicon is favorable to mass transfer and the limitation of movement of grain boundary.
硅的加入有利于传质和限制晶界移动；
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