文献类型：期刊文献

英文题名：Coordination polymer derived Fe-N-C electrocatalysts with high performance for the oxygen reduction reaction in Zn-air batteries

作者：Guo, Peng-Peng[1];Xu, Chao[1];Yang, Kun-Zu[1];Lu, Chen[1];Wei, Ping-Jie[1];Ren, Qi-Zhi[2];Liu, Jin-Gang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

年份：2024

卷号：53

期号：17

起止页码：7605

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20241615945856);WOS:【SCI-EXPANDED(收录号:WOS:001202429300001)】；

基金：This study was financially supported by the National Nature Science Foundation of China (No. 21571062), the Program for Professor of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning to J. G. L., and the Fundamental Research Funds for the Central Universities (No. 222201717003).

语种：英文

外文关键词：Carbon black - Chlorine compounds - Coordination reactions - Electrocatalysis - Electrolytic reduction - Iron compounds - Open circuit voltage - Oxygen - Porphyrins - Potassium hydroxide - Precious metals - Zinc air batteries - Zinc compounds

摘要：Developing high performance noble-metal-free electrocatalysts as an alternative to Pt-based catalysts for the oxygen reduction reaction (ORR) in energy conversion devices is highly desirable. We report herein the preparation of a coordination-polymer (CP)-derived Fe/CP/C composite as an electrocatalyst for the ORR with excellent activity and stability both in solution and in Zn-air batteries. The Fe/CP/C catalyst was obtained from the pyrolysis of an iron porphyrin Fe(TPP)Cl (5,10,15,20-tetraphenyl-21H,23H-porphyrin iron(iii) chloride) grafted Zn-coordination polymer with dangling functional groups 4,4 '-oxybisbenzoic acid and 4,4 '-bipyridine ligands. The Fe/CP/C catalyst showed much higher ORR activity with a half-wave potential (E1/2) of 0.90 V (vs. RHE) than the Fe/C catalyst (E1/2 = 0.85 V) derived from the carbon-black-supported Fe porphyrins in 0.1 M KOH solution. When Fe/CP/C was used as the cathode electrocatalyst in Zn-air batteries (ZABs), the ZABs achieved a significantly higher open circuit voltage (OCV = 1.43 V) and maximum power density (Pmax = 142.8 mW cm-2) compared with Fe/C (OCV = 1.38 V, Pmax = 104.5 mW cm-2) and commercial 20 wt% Pt/C (OCV = 1.41 V, Pmax = 117.6 mW cm-2). Using dangling functional groups in CP to increase the loading efficiency of iron porphyrins offered a facile method to prepare high-performance noble-metal-free electrocatalysts for the ORR, which may provide promising applications to energy conversion devices. Using dangling-group-containing coordination polymers as a support for increasing the loading efficiency of metal macrocycles offers a facile approach to prepare high performance M-N-C catalysts for the oxygen reduction reaction.