{'fraction_non_alphanumeric': 0.03167898627243928, 'fraction_numerical': 0.008447729672650475, 'mean_word_length': 5.2368421052631575, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Improve the Activity and Stability of PtCo/C Catalyst by Ionic Liquid in Proton Exchange Membrane Fuel Cell


 Ionic liquid ([MTBD][C4F9SO3]) has been explored as a surface modification of PtCo/C catalyst to improve its performance and durability in a membrane electrode assembly (MEA). Compared to the pristine catalyst, the incorporation of ionic liquid (IL) increases the oxygen reduction reaction (ORR) activity of PtCo/C and reduces the gas and proton diffusion resistance of the cathode catalyst layer, resulting in considerably improved MEA performance. More importantly, IL largely slows the ORR activity decay. The PtCo/C-IL outperformed PtCo/C throughout the 30,000 potential cycles test, which is consistent with higher active surface area retention and less Co dissolution of PtCo/C-IL. This work suggests that IL modification can serve as a complementary approach to the development of novel electrocatalysts and electrode structures.