Fu Shaofang, Zhu Chengzhou, Shi Qiurong, Xia Haibing, Du Dan, Lin Yuehe
The School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, USA.
State Key Laboratory of Crystal Materials, Shandong University, Jinan, P. R. China.
Nanoscale. 2016 Mar 7;8(9):5076-81. doi: 10.1039/c5nr07682j.
Morphology control is a promising strategy to improve the catalytic performance of Pt-based catalysts. In this work, we reported a facile synthesis of PtCu bimetallic alloy nanodendrites using Brij 58 as a template. The highly branched structures and porous features offer relatively large surface areas, which is beneficial to the enhancement of the catalytic activity for oxygen reduction reactions in fuel cells. In addition, the elimination of carbon supports showed an important effect on the stability of the catalysts. By tuning the ratio of Pt and Cu precursors, PtCu nanodendrites were almost four times more active on the basis of an equivalent Pt mass for oxygen reduction reactions than the commercial Pt/C catalyst.
形貌控制是提高铂基催化剂催化性能的一种很有前景的策略。在这项工作中，我们报道了一种以Brij 58为模板简便合成PtCu双金属合金纳米枝晶的方法。高度分支的结构和多孔特征提供了相对较大的表面积，这有利于增强燃料电池中氧还原反应的催化活性。此外，去除碳载体对催化剂的稳定性显示出重要影响。通过调节Pt和Cu前驱体的比例，基于等效Pt质量，PtCu纳米枝晶对氧还原反应的活性几乎是商业Pt/C催化剂的四倍。
