Liu Ping, Han Huijuan, Xia Qingyun, Ma Nini, Lu Sihan, Shang Xuefang, Wang Ge, Chao Shujun
Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medial University, Xinxiang 453003, P. R. China.
Dalton Trans. 2021 Sep 7;50(33):11440-11445. doi: 10.1039/d1dt01765a. Epub 2021 Aug 6.
A cost-effective non-noble metal bifunctional electrocatalyst towards the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is very important for energy-related applications. Micro/nanomaterials with core-shell structures have emerged as potential non-noble metal catalyst candidates. Herein, an efficient bifunctional oxygen electrocatalyst, S-containing Co-based metal organic framework core-shell microspheres (Co-MOF-CSMSs), has been designed and constructed by using 2,2':5',2''-terthiophene-5,5''-dicarboxylic acid as a novel ligand through a facile one-step hydrothermal method. Due to the integrated favorable structural characteristics of the core-shell structure and MOFs for electrocatalysis, Co-MOF-CSMSs are revealed as a good bifunctional electrocatalyst for the ORR and OER, including an onset potential of 0.93 V vs. RHE (reversible hydrogen electrode), a half-wave potential of 0.78 V vs. RHE and an overpotential of 0.35 V at 10 mA cm. This work provides a low-cost and facile method to design and construct advanced micro/nanomaterials with core-shell structures to targetedly develop high-performance bifunctional oxygen electrocatalysts.
一种对氧还原反应（ORR）和析氧反应（OER）具有成本效益的非贵金属双功能电催化剂对于与能源相关的应用非常重要。具有核壳结构的微/纳米材料已成为潜在的非贵金属催化剂候选物。在此，通过一种简便的一步水热法，以2,2':5',2''-三联噻吩-5,5''-二羧酸作为新型配体，设计并构建了一种高效的双功能氧电催化剂，即含硫钴基金属有机框架核壳微球（Co-MOF-CSMSs）。由于核壳结构和金属有机框架（MOFs）在电催化方面具有综合的有利结构特性，Co-MOF-CSMSs被证明是一种用于ORR和OER的良好双功能电催化剂，包括相对于可逆氢电极（RHE）的起始电位为0.93 V、半波电位为0.78 V以及在10 mA cm时的过电位为0.35 V。这项工作提供了一种低成本且简便的方法来设计和构建具有核壳结构的先进微/纳米材料，以有针对性地开发高性能双功能氧电催化剂。
