过电位
介孔材料
电催化剂
六亚甲基四胺
化学工程
无定形碳
电化学
材料科学
无定形固体
催化作用
碳纤维
磷化物
石墨氮化碳
无机化学
化学
电极
物理化学
有机化学
复合数
复合材料
工程类
光催化
作者
Mustapha Balarabe Idris,Thiruvenkatam Subramaniam,S. Devaraj
标识
DOI:10.1016/j.diamond.2022.109359
摘要
The electrocatalytic activity of g-C3N4 largely depends on its textural properties and conductivity. Herein, the textural properties and thus the electrocatalytic activity of mesoporous g-C3N4 (MGCN) are tuned by the addition of a carbonaceous precursor during the preparation. MGCN is prepared by a hard template method using the precursor, hexamethylenetetramine. N2 sorption and electrocatalytic studies reveal that the addition of glucose (0.1 or 0.3 or 0.5 g) during the preparation of MGCN increases the pore size, surface area and improves the kinetics of hydrogen evolution reaction (HER). In addition, the potential required to reach 10 mA cm−2 follows the trend: pristine MGCN (660.5 mV) > C-MGCN-0.5 (423.3 mV) > C-MGCN-0.1 (391.4 mV) > C-MGCN-0.3 (314.8 mV). The incorporation of amorphous carbon formed by the decomposition of glucose between the layers of MGCN increases the number of electrochemically active sites, facilitates charge transfer and thus improves the electrocatalytic activity of C-MGCN-0.3 towards HER. Furthermore, a substantial decrease in the overpotential for HER and in the potential required to achieve 10 mA cm−2 are observed on extended cycling suggesting an electrochemical activation of the catalyst during cycling.
科研通智能强力驱动
Strongly Powered by AbleSci AI