基于非贵金属氧还原催化剂的质子交换膜燃料电池性能
收稿日期: 2020-03-14
修回日期: 2020-05-08
网络出版日期: 2020-05-08
基金资助
国家重点研发计划新能源汽车重点专项(2017YFB0102900);国家重点研发计划新能源汽车重点专项(2018YFB0105700);佛山市香港科技大学产学研合作专项(FSUST19-FYTRI07);广东省基础与应用基础研究基金区域联合基金-青年基金项目资助(2019A1515110253)
Fuel Cell Performance of Non-Precious Metal Based Electrocatalysts
Received date: 2020-03-14
Revised date: 2020-05-08
Online published: 2020-05-08
张焰峰 , 肖菲 , 陈广宇 , 邵敏华 . 基于非贵金属氧还原催化剂的质子交换膜燃料电池性能[J]. 电化学, 2020 , 26(4) : 563 -572 . DOI: 10.13208/j.electrochem.200314
The commercialization of proton exchange membrane fuel cells (PEMFCs) is hindered by high cost and low durability of Pt based electrocatalysts. Developing efficient and durable non-precious metal catalysts is a promising approach to addressing these conundrums. Among them, transition metals dispersed in a nitrogen (N)-doped carbon support (M-N-C) show good oxygen reduction reaction activity. This article reviews recent progress in M-N-C catalysts development, focusing on the catalysts design, membrane electrode assembly fabrication, fuel cell performance, and durability testing. Template-assisted approach is an efficient way to synthesize M-N-C materials with homogeneously dispersed single atom active site and reduced metal particles, carbides formation. However, the issue related to low intensity of active sites should be addressed via strengthening metal-ligand interaction and using high surface area precursors. In general, the catalyst loading for the membrane electrode assembly (MEA) of non-precious catalyst is high (3 ~ 4 mg·cm-2) in order to obtain acceptable performance, which is also highly dependent on ink preparation and coating protocol, ionomer/catalyst ratio, etc. The highest power densities for Fe-N-C and Co-N-C are reported to be 1.18 and 0.87 W·cm-2 with O2 at the cathode, respectively. Despite the significant progress in non-precious metal catalysts development, the undesired durability (only a few hundreds of hours) is still far from the target of 5000 h by 2025. Thus, much more efforts should be spent on improving their durability.
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