Preparation of a Graphitized-Carbon-Supported PtNi Octahedral Catalyst and Application in a Proton-Exchange Membrane Fuel Cell
Preparation of a Graphitized-Carbon-Supported PtNi Octahedral Catalyst and Application in a Proton-Exchange Membrane Fuel Cell
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石墨化碳负载PtNi八面体催化剂的制备及其在质子交换膜燃料电池中的应用
DOI：
10.1021/acsami.9b17248
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发表时间：
2020
影响因子：
9.5
通讯作者：
Cunman Zhang
中科院分区：
文献类型：
--
作者：
Jue Wang;Qiong Xue;Bing Li;Daijun Yang;Hong Lv;Qiangfeng Xiao;Pingwen Ming;Xuezhe Wei;Cunman Zhang
本文以石墨化碳为原料制备了PtNi/GC八面体纳米晶催化剂，以解决阴极催化剂在催化性能和质子交换膜燃料电池应用中存在的问题。所制备的负载型催化剂具有结晶良好的八面体形貌和石墨层结构，具有较高的耐蚀性。其质量活度和比活度分别是商品铂碳的5倍和7倍。性能最好的样品在单电池测试中，电池电压为0.672 V，最大功率密度为817.6 mW cm-2，分别比对照提高了23 mV和13.2mW cm-2。尤其是经过高电位测试后，该样品的上述两个参数仅降低了5.6%和8.4%，明显低于用Vulcan XC-72炭黑制成的对照样品的衰减。研究表明，GC负载的PtNi八面体催化剂可以更好地考虑提高电化学性能和单电池性能。
In this work, PtNi/GC octahedral nanocrystal catalysts are prepared using graphitized carbon (GC) to solve the problems of cathode catalysts in catalytic performance and proton-exchange membrane fuel cell application. The as-prepared supported catalysts exhibit well-crystallized octahedral morphologies and graphite layer structures with high corrosion resistance. Their mass activities and specific activities are 5 and 7 times higher than those of the commercial Pt/C. The sample with the best performance shows the cell voltage at 1000 mA cm–2of 0.672 V and maximum power density of 817.6 mW cm–2in the single-cell test, which are increased by 23 mV and 13.2 mW cm–2compared to the control. Especially after a high potential test, the above two parameters of this sample are reduced by only 5.6 and 8.4%, which are significantly lower than the attenuation of the control fabricated using Vulcan XC-72 carbon black. The work reveals that the GC-supported PtNi octahedral catalysts can give better consideration to the improvement of electrochemical and single-cell performances.