Noble metal nanomaterials have received great attentions,and have been widely studied for decades,due to their excellent performance as catalysts in chemical industry,environmental protection and energy production.However,due to the limited source and high cost of noble metals,it is currently an important task and hot research topic on how to design and prepare catalysts with low noble metal loadings.One of the promising and feasible routes to achieve this goal is to prepare bimetallic catalysts containing both a noble metal and a transition metal,in which the transition metal does not only decreases the amount of noble metal but also improves its catalytic performance [1].