Carbon-supported Pt nanowire as novel cathode catalysts for proton exchange membrane fuel cells
Carbon-supported Pt nanowire as novel cathode catalysts for proton exchange membrane fuel cells
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碳载铂纳米线作为质子交换膜燃料电池的新型阴极催化剂
DOI：
10.1016/j.jpowsour.2014.04.004
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发表时间：
2014-09-15
影响因子：
9.2
通讯作者：
Ma, Jianxin
中科院分区：
文献类型：
--
作者：
Li, Bing;Yan, Zeyu;Ma, Jianxin
碳载铂纳米线（PtNW/C）是通过一种简单、廉价的无模板方法成功合成的，并被证明是一种新型的、适用于质子交换膜燃料电池（PEMFC）应用的阴极电极材料。考察了还原剂用量、反应时间等合成条件对PtNW/C催化剂纳米结构和活性的影响。高分辨率透射电子显微镜（TEM）结果表明，甲酸促进的还原能够产生均匀分布的一维PtNW，其平均横截面直径为4.0 +/- 0.2 nm，长度为20-40 nm。通过半电池电化学测试的电催化活性的研究表明，PtNVVIC催化剂表现出显着的氧还原反应（ORR）活性，上级优于市售的Pt/C。使用0.4 mgpt cm（-2）PtNVV/C作为阴极催化剂，在50 cm（2）的商业Pt/C单电池中的最大功率密度为748.8 mW cm（-2）。此外，加速降解试验（ADT）表明，PtNW/C催化剂具有更好的耐久性比商业Pt/C，使PtNW/C作为一个有前途的替代传统的Pt/C作为PEMFC应用的阴极电催化剂。(C)2014爱思唯尔有限公司版权所有。
Carbon-supported platinum nanowires (PtNW/C) are successfully synthesized by a simple and inexpensive template-free methodology and demonstrated as novel, suitable cathode electrode materials for proton exchange membrane fuel cell (PEMFC) applications. The synthesis conditions, such as the amount of reducing agent and reaction time, were investigated to investigate the effect on the nanostructures and activities of the PtNW/C catalysts. High-resolution transmission electron microscopy (TEM) results show that the formic acid facilitated reduction is capable of producing uniformly distributed 1-dimensional PtNW with an average cross-sectional diameter of 4.0 +/- 0.2 nm and length of 20-40 nm. Investigation of the electrocatalytic activity by half-cell electrochemical testing reveals that PtNVVIC catalyst demonstrates significant oxygen reduction reaction (ORR) activity, superior to that of commercially available Pt/C. Using a loading of 0.4 mgpt cm(-2) PtNVV/C as the cathode catalyst, a maximum power density of 748.8 mW cm(-2) in a 50 cm(2) single cell of commercial Pt/C. In addition, accelerated degradation testing (ADT) showed that the PtNW/C catalyst exhibits better durability than commercial Pt/C, rendering PtNW/C as a promising replacement to conventional Pt/C as cathode electrocatalysts for PEMFCs applications. (C) 2014 Elsevier B.V. All rights reserved.