Ultralow content of Pt on Pd–Co–Cu/C ternary nanoparticles with excellent electrocatalytic activity and durability for the oxygen reduction reaction
Ultralow content of Pt on Pd–Co–Cu/C ternary nanoparticles with excellent electrocatalytic activity and durability for the oxygen reduction reaction
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Pd-Co-Cu/C三元纳米粒子上的超低Pt含量，具有优异的电催化活性和氧还原反应的耐久性
DOI：
10.1016/j.nanoen.2016.07.038
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发表时间：
2016-09
期刊：
影响因子：
17.6
通讯作者：
Deli Wang
中科院分区：
文献类型：
--
作者：
Sufen Liu;Weiping Xiao;Jie Wang;Jing Zhu;Zexing Wu;Huolin Xin;Deli Wang
优化利用Pt催化氧还原反应（ORR）的缓慢动力学是质子交换膜燃料电池中至关重要的。策略之一是将Pt原子散布在衬底的表面上以增加表面积。在这里，我们报道了一种简便的方法来合成Pd6CoCu@Pt/C核壳纳米粒子与超低量的Pt。结果表明，在Pd 6CoCu核上包覆Pt层对提高催化剂的ORR活性和循环稳定性起着重要作用。Pd6CoCu@Pt/C的半波电位相对于Pd 6CoCu/C和Pt/C分别正移约50 mV和17 mV。在0.9V下，Pd6CoCu@Pt/C上的Pt质量活性计算为Pt/C催化剂上的Pt质量活性的约27倍。此外，Pd6CoCu@Pt/C纳米颗粒表现出优异的上级稳定性，在10，000个电位循环期间ORR极化曲线几乎没有衰减，并且核-壳结构保持，Pt覆盖层的厚度仅略微增加。这些发现提供了一种合成高效催化材料的方法，用于燃料电池的阴极应用。
Optimizing the utilization of Pt to catalyze the sluggish kinetics of the oxygen reduction reaction (ORR) is of vital importance in proton exchange membrane fuel cells. One of the strategies is to spread Pt atoms over the surface of a substrate to increase the surface area. Here we report a facile method to synthesize Pd6CoCu@Pt/C core-shell nanoparticles with an ultralow amount of Pt. It was found that Pt-coated layer on Pd6CoCu cores plays a vital role in enhancing the ORR activity and the cycling stability. The half-wave potential of Pd6CoCu@Pt/C positively shifts about 50 mV and 17 mV relative to Pd6CoCu/C and Pt/C, respectively. The Pt mass activity on Pd6CoCu@Pt/C was calculated to be about 27 times higher than that on Pt/C catalysts at 0.9 V. Moreover, the Pd6CoCu@Pt/C nanoparticles exhibit superior stability with almost no decay for the ORR polarization curves during 10,000 potential cycles and the core-shell structure remains with only a slight increase in the thickness of the Pt overlayer. These findings provide a methodology for synthesizing highly efficient catalytic materials for the cathodic application in fuel cells.
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影响因子：
6.6
作者：
Jiening Zheng;Li-Li He-Li;Fang-Yi Chen;Ai-Jun Wang;Meng-Wei Xue;Jiu-Ju Feng
通讯作者：
Jiening Zheng;Li-Li He-Li;Fang-Yi Chen;Ai-Jun Wang;Meng-Wei Xue;Jiu-Ju Feng
影响因子：
9.2
作者：
Juan Zhao;K. Jarvis;P. Ferreira;A. Manthiram
通讯作者：
Juan Zhao;K. Jarvis;P. Ferreira;A. Manthiram
影响因子：
3.9
作者：
S. Rudi;Lin Gan;Chunhua Cui;Manuel Gliech;P. Strasser
通讯作者：
S. Rudi;Lin Gan;Chunhua Cui;Manuel Gliech;P. Strasser
影响因子：
64.8
作者：
Steele, BCH;Heinzel, A
通讯作者：
Heinzel, A
影响因子：
21.8
作者：
Greeley, J.;Stephens, I. E. L.;Norskov, J. K.
通讯作者：
Norskov, J. K.