Highly efficient iron–nitrogen electrocatalyst derived from covalent organic polymer for oxygen reduction

作     者：Jianing Guo Mengyao Ning Zhonghua Xiang 

作者机构：State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2017年第26卷第6期

页      面：1168-1173页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Key Research and Development Program of China(2017YFA0206500) NSF of China(51502012 21676020 21620102007) Beijing Natural Science Foundation(2162032) The Start-up fund for talent introduction of Beijing University of Chemical Technology(buctrc201420 buctrc201714) Talent cultivation of State Key Laboratory of OrganicInorganic Composites The Fundamental Research Funds for the Central Universities(ZD1502) Distinguished scientist program at BUCT(buctylkxj02) the“111”project of China(B14004) 

主　　题：Oxygen reduction reaction Electrocatalyst Covalent organic frameworks Nonprecious metal catalysts Fe–N_x 

摘      要：Developing non-precious metal catalyst with high activity, good stability and low cost for electrocatalytic oxygen reduction reaction（ORR） is critical for the wide application of energy conversion system. Here, we developed a cost–effective synthetic strategy via silica assistance to obtain a novel FeC/Fe–N–C（named as COPBP-PB-Fe-900-SiO） catalyst with effective active sites of Fe–Nand FeC from the rational design two-dimensional covalent organic polymer（COPBP-PB）. The nitrogen-rich COP effectively promotes the formation of active Fe–Nsites. Additionally, the silica not only can effectively suppress the formation of large Fe-based particles in the catalysts, but also increases the degree of carbonization of the *** as-prepared COPBP-PB-Fe-900-SiOcatalyst exhibits high electrocatalytic activity for ORR with a halfwave potential of 0.85 V vs. reversible hydrogen electrode（RHE）, showing comparable activity as compared with the commercial Pt/C catalysts in alkaline media. Moreover, this catalyst also shows a high stability with a nearly constant onset potential and half-wave potential after 10,000 cycles. The present work is highly meaningful for developing ORR electrocatalysts toward wide applications.