Preparation optimization and single cell application of PtNi/C octahedral catalyst with enhanced ORR performance
Preparation optimization and single cell application of PtNi/C octahedral catalyst with enhanced ORR performance
复制标题
增强ORR性能的PtNi/C八面体催化剂的制备优化及单细胞应用
DOI：
10.1016/j.electacta.2018.09.005
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发表时间：
2018-10-20
影响因子：
6.6
通讯作者：
Zhang, Cunman
中科院分区：
文献类型：
--
作者：
Wang, Jue;Li, Bing;Zhang, Cunman
On the basis of research on the effect of reaction conditions on nanocrystal morphology and performance, the preparation process of octahedral catalyst is optimized, and the PtNi/C octahedral nanocrystal catalyst with well-defined structure and enhanced performance is prepared by a one-pot solvothermal method using benzoic acid as structure directing agent. In rotating disk electrode test, its mass activity and specific activity reach 4.7 and 6.6 times of the commercial Pt/C catalyst, and its stability is also higher after accelerated durability testing. In order to fill the research blank on single cell application of octahedral catalyst, membrane electrode assembly is fabricated using this PtNi/C octahedral catalyst in cathode. Compared with the control, although a lower Pt loading is employed, its cell voltage at 1000 mA cm(-2) and maximum power density are increased by 27 mV and 132.8 mW cm(-2), respectively, demonstrating that PtNi/C octahedral catalyst exhibits actual application potential in proton exchange membrane fuel cells. After further regulating composition and structure of alloy nanocrystals, optimizing preparation process of membrane electrode assembly and investigating the durability of single cell and stack under dynamic driving cycle conditions, Pt-based octahedral catalysts are expected to replace the conventional Pt/C catalyst. (C) 2018 Elsevier Ltd. All rights reserved.
