多孔性
材料科学
电池(电)
电催化剂
析氧
电流密度
双功能
碳纤维
电化学
介孔材料
催化作用
电极
化学工程
扩散
气体扩散电极
纳米技术
复合材料
化学
功率(物理)
热力学
工程类
物理
复合数
物理化学
量子力学
生物化学
作者
Zhiping Deng,Mingxing Gong,Zhe Gong,Xiaolei Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-11-15
卷期号:22 (23): 9551-9558
被引量:19
标识
DOI:10.1021/acs.nanolett.2c03696
摘要
Two-electron oxygen reduction toward hydrogen peroxide (H2O2) offers a promising alternative for H2O2 production, but its commercial utilization is still hindered by the difficulty of transferring lab-observed catalyst performance to the practical reactor. Here we report the investigation of the porosity engineering effect on catalytic performance inconsistency through a material platform consisting of a series of hollow mesoporous carbon sphere (HMCS) samples. The performance comparison of HMCS samples in rotating ring-disk electrode and Zn-air battery together with the simulation of diffusion behavior reveals that, in low current density conditions, large surface area is preferred, but the mass transport governs the performance in high current density regions. On account of the favorable porous structure, HMCS-8 nm delivers the most excellent practical performance (166 mW cm-2) and performs well in the bifunctional Zn-air battery for the wastewater purification (70% RhB degraded after 2 min and 99% after 32 min).
科研通智能强力驱动
Strongly Powered by AbleSci AI