电催化剂
催化作用
碳纤维
硫黄
无机化学
化学工程
化学
镁
氮气
金属
石墨氮化碳
氧气
材料科学
三聚氰胺
电化学
有机化学
电极
光催化
复合材料
物理化学
复合数
工程类
作者
Dongyu Yan,Ying Han,Zihao Ma,Qingyu Wang,Xing Wang,Yao Li,Guangwei Sun
标识
DOI:10.1016/j.ijbiomac.2022.04.063
摘要
The development of metal-free electrocatalytic materials that are economical, friendly to the environment, and efficiency towards the oxygen reduction reaction (ORR) is of significant interest. Hence, this paper synthesizes nitrogen and sulfur co-doped three-dimensional magnesium lignosulfonate (MLS-derived) flower-like hierarchical porous carbon (NSLPC) materials by a simple and green method. The synthesized NSLPC uses magnesium lignosulfonate as the sulfur source and carbon precursor, melamine as nitrogen source, MgO as hard template, and ZnCl2 as the activator. We also investigated the effect of the ratio of MgO to ZnCl2 on the catalyst performance. When the ratio of MgO to ZnCl2 is 10:0.5, NSLPC-1005 possesses the highest ORR activity with an enormous surface area (1752.54 m2 g-1), abundant active sites, and a hierarchical porous network structure. In alkaline media, NSLPC-1005 has an initial potential of 0.97 V, as well as an excellent half-potential of 0.86 V (vs. Hg/HgO), and an ultimate current density of 5.35 mA cm-2. It exhibits attractive ORR performance as well as outstanding cyclic stability that are comparable to commercial Pt/C electrocatalysts. This research developed an effective approach to synthesize metal-free carbon materials with high activity and long-term durability as electrocatalysts, which have a promising application in sustainable energy conversion technology.
科研通智能强力驱动
Strongly Powered by AbleSci AI