Impact of Pore Structure on Two-Electron Oxygen Reduction Reaction in Nitrogen-Doped Carbon Materials: Rotating Ring-Disk Electrode vs. Flow Cell

In this study, assisted by a group of reliable pore models, the impact of two pore structure parameters, that is, Brunauer-Emmett-Teller surface area (SBET ) and micropore surface fraction (fmicro ), on ORR activity and selectivity are investigated in both RRDE and FC. The ORR mass activity correlates positively to the SBET in the RRDE and FC because a higher SBET can host more active sites. The H2 O2 selectivity is independent of fmicro in the RRDE but correlates negatively to fmicro in the FC. The inconsistency results from different states of the electrode in the RRDE and the FC. These insights will guide the design of carbon materials for H2 O2 synthesis.PMID:35102711 | DOI:10.1002/cssc.202102587

Source: ChemSusChem - February 1, 2022 Category: Chemistry Authors: Hui Xu Xue-Hui Lv Hao-Yu Wang Jin-Yu Ye Jiayin Yuan Yu-Cheng Wang Zhi-You Zhou Shi-Gang Sun Source Type: research