文献类型：期刊文献

英文题名：Phenylenediamine-Based FeNx/C Catalyst with High Activity for Oxygen Reduction in Acid Medium and Its Active-Site Probing

作者：Wang, Qiang[1];Zhou, Zhi-You[1];Lai, Yu-Jiao[1];You, Yong[2,3];Liu, Jian-Guo[2,3];Wu, Xia-Ling[1];Terefe, Ephrem[1];Chen, Chi[1,4];Song, Lin[1];Rauf, Muhammad[1];Tian, Na[1];Sun, Shi-Gang[1]

机构：[1]Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China;[2]Nanjing Univ, Ecomat & Renewable Energy Res Ctr, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China;[3]Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China;[4]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：136

期号：31

起止页码：10882

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20143318068123);WOS:【SCI-EXPANDED(收录号:WOS:000340079800016)】；

基金：This work was supported by grants from Major State Basic Research Development Program of China (2012CB215500), Natural Science Foundation of China (21373175, 21361140374, and 21321062), Fundamental Research Funds for the Central Universities (2012121019), Program for New Century Excellent Talents in University (NECT-11-0301), and NFFTBS 01310024). We thank Yan-Ping Zheng in Xiamen University for XPS test.

语种：英文

外文关键词：Catalyst activity - Electrocatalysts - Catalytic oxidation - Electrolytic reduction - Iron compounds - Oxygen

摘要：High-temperature pyrolyzed FeNx/C catalyst is one of the most promising nonprecious metal electrocatalysts for oxygen reduction reaction (ORR). However, it suffers from two challenging problems: insufficient ORR activity and unclear active site structure. Herein, we report a FeNx/C catalyst derived from poly-m-phenylenediamine (PmPDA-FeNx/C) that possesses high ORR activity (11.5 A g(-1) at 0.80 V vs RHE) and low H2O2 yield (<1%) in acid medium. The PmPDA-FeNx/C also exhibits high catalytic activity for both reduction and oxidation of H2O2. We further find that the ORR activity of PmPDA-FeNx/C is not sensitive to CO and NOx but can be suppressed significantly by halide ions (e.g., Cl-, F-, and Br-) and low valence state sulfur-containing species (e.g., SCN-, SO2, and H2S). This result reveals that the active sites of the FeNx/C catalyst contains Fe element (mainly as Fe-III at high potentials) in acid medium.