1. Facile synthesis of NS@UiO-66 porous carbon for efficient oxygen reduction reaction in microbial fuel cells.
- Author
-
Huang, Linzhe, Zhong, Kengqiang, Zhang, Hongguo, Wu, Guoqing, Yang, Ruoyun, Lin, Dongjiao, Babu Arulmani, Samuel Raj, Liu, Xianjie, Huang, Lei, and Yan, Jia
- Subjects
- *
MICROBIAL fuel cells , *OXYGEN reduction , *MASS transfer , *DENSITY functional theory , *DOPING agents (Chemistry) , *POWER density - Abstract
Exploiting a facile way to synthesize low-cost and high-performance oxygen reduction reaction (ORR) catalysts is a core issue in microbial fuel cells (MFCs). Hence, a facile and extensible method has been developed to prepare efficient ORR catalysts by using robust UiO-66 as a precursor, modified with melamine and trithiocyanuric via the impregnation method. Benefiting from the hierarchical structure of UiO-66, the NS@UiO-66 has excellent stability, more active sites and improved mass transfer. Significantly, the half-wave potential and the current density of the NS@UiO-66 are 0.546 V vs. RHE and 6.19 mA cm−2 respectively, which is better than that of benchmark Pt/C in neutral conditions. Furthermore, the power density of MFCs assembled with the NS@UiO-66 catalyst is 318.6 ± 2.15 mW m−2. The density functional theory calculation demonstrates that the reaction barrier can be reduced effectively for accelerating the ORR process through the synergistic effect of N and S. The NS@UiO-66, as an ideal candidate to substitute for the commercial Pt/C counterpart, is expected to promote the scaling-up production and application of MFCs due to low-cost elements doping and facilely synthetic method. [Display omitted] • A facile synthesis way for preparing NS@UiO-66 porous carbon is proposed. • UiO-66 is a stable platform exposing more active sites and boosting mass transfer. • N, S co-doping induces charge redistribution and reduces the activation barrier. • The stable NS@UiO-66 shows great ORR property and application prospects in MFCs. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF