Korchagin Oleg, Bogdanovskaya Vera, Vernigor Inna, Radina Marina, Stenina Irina, Yaroslavtsev Andrey
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, Russia.
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119071 Moscow, Russia.
Membranes (Basel). 2023 Jul 14;13(7):669. doi: 10.3390/membranes13070669.
Studies have been carried out to optimize the composition, formation technique and test conditions of membrane electrode assemblies (MEA) of hydrogen-oxygen anion-exchange membranes fuel cells (AEMFC), based on Fumatech anion-exchange membranes. A non-platinum catalytic system based on nitrogen-doped CNT (CNT) was used in the cathode. PtMo/CNT catalysts with a reduced content of platinum (10-12 wt.% Pt) were compared with 10 and 60 wt.% Pt/CNT at the anode. According to the results of studies under model conditions, it was found that the PtMo/CNT catalyst is significantly superior to the 10 and 60 wt.% Pt/CNT catalyst in terms of activity in the hydrogen oxidation reaction based on the mass of platinum. The addition of the Fumion ionomer results in minor changes in the electrochemically active surface area and activity in the hydrogen oxidation reaction for each of the catalysts. In this case, the introduction of ionomer-Fumion leads to a partial blocking of the outer surface and the micropore surface, which is most pronounced in the case of the 60Pt/CNT catalyst. This effect can cause a decrease in the characteristics of MEA AEMFC upon passing from 10PtMo/CNT to 60Pt/CNT in the anode active layer. The maximum power density of the optimized MEA based on 10PtMo/CNT was 62 mW cm, which exceeds the literature data obtained under similar test conditions for MEA based on platinum cathode and anode catalysts and Fumatech membranes (41 mW cm). A new result of this work is the study of the effect of the ionomer (Fumion) on the characteristics of catalysts. It is shown that the synthesized 10PtMo/CNT catalyst retains high activity in the presence of an ionomer under model conditions and in the MEA based on it.
基于富马泰克阴离子交换膜，开展了多项研究以优化氢氧阴离子交换膜燃料电池（AEMFC）的膜电极组件（MEA）的组成、制备技术和测试条件。阴极采用了基于氮掺杂碳纳米管（CNT）的非铂催化体系。在阳极，将铂含量降低的PtMo/CNT催化剂（10 - 12 wt.% Pt）与10 wt.%和60 wt.% Pt/CNT进行了比较。根据模型条件下的研究结果发现，基于铂的质量，PtMo/CNT催化剂在氢氧化反应活性方面明显优于10 wt.%和60 wt.% Pt/CNT催化剂。添加富米翁离聚物会使每种催化剂的电化学活性表面积和氢氧化反应活性发生微小变化。在这种情况下，离聚物 - 富米翁的引入会导致外表面和微孔表面部分被阻断，这在60Pt/CNT催化剂的情况下最为明显。这种效应可能会导致阳极活性层从10PtMo/CNT转变为60Pt/CNT时，MEA AEMFC的性能下降。基于10PtMo/CNT的优化MEA的最大功率密度为62 mW/cm²，超过了在类似测试条件下基于铂阴极和阳极催化剂以及富马泰克膜的MEA的文献数据（41 mW/cm²）。这项工作的一个新成果是研究了离聚物（富米翁）对催化剂性能的影响。结果表明，合成的10PtMo/CNT催化剂在模型条件下以及基于它的MEA中，在离聚物存在的情况下仍保持高活性。
