Phosphorus and iron doped nitrogen-containing carbon derived from biomass for oxygen reduction under various pH conditions. (30th October 2020)

• Record Type: Journal Article
• Authors: Li, Ruisong; Zheng, Feng-Yi; Zhang, Xiaohan; Hu, Jiadan; Xu, Congying; Zhang, Yucang
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 53(2020)
• Page Start: 28651
• Page End: 28663
• Publication Date: 2020-10-30
• Subjects: Phosphorus doping -- Iron doping -- pH universal -- Oxygen reduction reaction -- Stability -- Fuel cell; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.07.178
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Various catalysts were synthesized by incorporating phosphorus and iron into nitrogen-containing carbon derived from shrimp shell with pyrolysis. These catalysts had high specific surface area, uniform atomic doping and various active sites, which resulted in the high kinetics activity towards oxygen reduction reaction (ORR) under various pH conditions. Based on different doping sources to analyse ORR activity, phosphorus-doped catalyst was suitable for alkaline medium and iron doping for acidic medium, while their synergistic effect induced the highest ORR activity in neutral medium. Besides, the stability measurements investigated their abilities for application. Introducing iron into nitrogen-containing carbon could gradually strengthen the long-term stability for different catalysts in various pH conditions. Especially, phosphorus doping promoted the best ORR performance in alkaline condition with an extremely poor stability, which could be overcome by further adding iron. This work provides a strategy for the doped biomass-based carbon to accommodate different fuel cells. Graphical abstract: Phosphorus and iron are incorporated in nitrogen-containing carbon derived from shrimp shell to prepare dual-doped and tri-doped catalysts with excellent ORR performance and stability under various pH conditions for different fuel cells. Image 1 Highlights: Shrimp shells were oxidized as carbon support to promote efficient active sites. Various catalysts were designed to meet different pH conditions for ORR. Introducing phosphorus improved ORR performance and iron enhanced stability. Phosphorus and iron synergistically facilitated excellent activity and stability in neutral.