Synthesis of highly active and dual-functional electrocatalysts formethanol oxidation and oxygen reduction reactions
Synthesis of highly active and dual-functional electrocatalysts formethanol oxidation and oxygen reduction reactions
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用于甲醇氧化和氧还原反应的高活性双功能电催化剂的合成
DOI：
10.1016/j.apsusc.2016.07.097
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发表时间：
2016
影响因子：
6.7
通讯作者：
Qin Wang
中科院分区：
文献类型：
--
作者：
Qi Zhao;Geng Zhang;Guangran Xu;Yingjun Li;Dafang Zheng;Qin Wang
铂基三元催化剂是聚合物电解质膜燃料电池（PEM-FCs）的关键催化剂，可提高甲醇氧化反应和氧还原反应的催化活性和耐久性。在这项工作中，一个简单的策略是用于合成三元RuMPt（M = Fe，Co，Ni和Cu）纳米树枝状催化剂。与二元Pt基合金和商品Pt/C催化剂相比，三元RuMPt合金具有更高的比活度、质量活度、正半波电位和长期稳定性，这归因于Pt原子的高电子密度和d带中心的上移，以及引入过渡金属后Pt、M和Ru原子间的协同催化作用。令人印象深刻的是，三元RuCoPt催化剂分别对莫尔和ORR表现出上级的质量活性（801.59 mA mg-1）和正半波电位（0.857 V vs. RHE）。因此，RuMPt纳米复合材料是一种很有前途的双电催化剂材料，可用于PEMFC的应用
The promising Pt-based ternary catalyst is crucial for polymer electrolyte membrane fuel cells (PEM-FCs) due to improving catalytic activity and durability for both methanol oxidation reaction and oxygenreduction reaction. In this work, a facile strategy is used for the synthesis ternary RuMPt (M = Fe, Co, Ni,and Cu) nanodendrities catalysts. The ternary RuMPt alloys exhibit enhanced specific and mass activ-ity, positive half-wave potential, and long-term stability, compared with binary Pt-based alloy and thecommercial Pt/C catalyst, which is attributed to the high electron density and upshifting of the d-bandcenter for Pt atoms, and synergistic catalytic effects among Pt, M, and Ru atoms by introducing a tran-sition metal. Impressively, the ternary RuCoPt catalyst exhibits superior mass activity (801.59 mA mg−1)and positive half-wave potential (0.857 V vs. RHE) towards MOR and ORR, respectively. Thus, the RuMPtnanocomposite is a very promising material to be used as dual electrocatalyst in the application of PEMFCs