Atomically Dispersed Semi-Metallic Selenium on Porous Carbon Membrane as an Electrode for Hydrazine Fuel Cells

Wang, TZ (Wang, Tongzhou)^{[ 1 ]} ; Wang, Q (Wang, Qiang)^{[ 2 ]} ; Wang, YC (Wang, Yucheng)^{[ 3 ]} ; Da, YL (Da, Yunli)^{[ 4,5 ]} ; Zhou, W (Zhou, Wu)^{[ 4,5 ]} ; Shao, Y (Shao, Yue)^{[ 1 ]} ; Li, DB (Li, Debao)^{[ 2 ]} ; Zhan, SH (Zhan, Sihui)^{[ 6 ]} ; Yuan, JY (Yuan, Jiayin)^{[ 3 ]} ; Wang, H (Wang, Hong)^{[ 1 ]}

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2019, 58(38): 13466-13471

DOI: 10.1002/anie.201907752

摘要

Electrochemically functional porous membranes of low cost are appealing in various electrochemical devices used in modern environmental and energy technologies. Herein we describe a scalable strategy to construct electrochemically active, hierarchically porous carbon membranes containing atomically dispersed semi-metallic Se, denoted SeNCM. The isolated Se atoms were stabilized by carbon atoms in the form of a hexatomic ring structure, in which the Se atoms were located at the edges of graphitic domains in SeNCM. This configuration is different from that of previously reported transition/noble metal single atom catalysts. The positively charged Se, enlarged graphitic layers, robust electrochemical nature of SeNCM endow them with excellent catalytic activity that is superior to state-of-the-art commercial Pt/C catalyst. It also has long-term operational stability for hydrazine oxidation reaction in practical hydrazine fuel cell.