文献类型：期刊文献

英文题名：An iron and lanthanide heterobimetallic coordination polymer derived electrocatalyst showing enhanced activity and stability for the oxygen reduction reaction

作者：Liu, Xin[1];Guo, Peng-Peng[1];Yang, Kun-Zu[1];Su, Yong-Zhi[1];Xu, Chao[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]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：54

期号：17

起止页码：7023

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20251518204719);WOS:【SCI-EXPANDED(收录号:WOS:001458847800001)】；

基金：Financial support from the National Natural Science Foundation of China (No. 21571062), the Program for Professor of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning, and the Fundamental Research Funds for the Central Universities (No. 222201717003) is kindly acknowledged.

语种：英文

外文关键词：Decay (organic) - Electrolytic reduction - Free radical reactions - Iron compounds - Lanthanum alloys - Lanthanum compounds - Oxygen reduction reaction - Photodissociation - Rate constants - Solar power generation - Zinc air batteries - Zinc alloys - Zinc compounds

摘要：It is desirable to develop noble-metal-free electrocatalysts with both excellent activity and stability for the oxygen reduction reaction (ORR) in clean energy conversion devices. Herein, we report an Fe, La co-doped FeLaNC electrocatalyst obtained by pyrolyzing a heterobimetallic coordination polymer [La2L3(CH3OH)4]infinity loaded on carbonized ZIF-8, which was synthesized from 1,1 '-ferrocenedicarboxylic acid (H2L1) and lanthanum salt. The FeLaNC catalyst exhibited higher ORR activity with a half-wave potential (E1/2) of 0.874 V (vs. RHE) than the control catalyst FeNC (E1/2 = 0.864 V) without the La dopant as well as commercial 20 wt% Pt/C (E1/2 = 0.862 V) in 0.1 M KOH solution, and FeLaNC displayed excellent stability with negligible half-wave potential decay after 10 000 potential cycles. When FeLaNC was applied as a cathodic electrocatalyst in Zn-air batteries (ZABs), the open circuit voltage (OCV) and maximum power density (Pmax) of the FeLaNC-based ZABs reached 1.46 V and 130 mW cm-2, respectively, which were significantly higher than those of Pt/C (OCV = 1.41 V and Pmax = 120 mW cm-2). The introduction of La3+ into Fe-N-C catalysts not only promoted ORR activity by regulating the electron density of Fe-Nx sites but also enhanced the stability by eliminating the harmful radicals, which provided an effective approach to prepare high-performance and stable electrocatalysts to be applied in energy conversion devices.