光催化
材料科学
石墨氮化碳
密度泛函理论
异质结
吉布斯自由能
兴奋剂
电化学
催化作用
多孔性
层状结构
吸附
化学工程
纳米技术
物理化学
计算化学
化学
热力学
光电子学
物理
有机化学
电极
工程类
复合材料
作者
Haitao Wang,Jizhou Jiang,Lianglang Yu,Jiahe Peng,Zhanqian Song,Zhiguo Xiong,Neng Li,Kun Xiang,Jing Zou,Jyh‐Ping Hsu,Tianyou Zhai
出处
期刊:Small
[Wiley]
日期:2023-05-16
卷期号:19 (28)
被引量:37
标识
DOI:10.1002/smll.202301116
摘要
Abstract Although challenges remain, synergistic adjusting various microstructures and photo/electrochemical parameters of graphitic carbon nitride (g‐C 3 N 4 ) in photocatalytic hydrogen evolution reaction (HER) are the keys to alleviating the energy crisis and environmental pollution. In this work, a novel nitrogen‐defective and sulfur‐doped g‐C 3 N 4 (S‐g‐C 3 N 4 ‐D) is designed elaborately. Subsequent physical and chemical characterization proved that the developed S‐g‐C 3 N 4 ‐D not only displays well‐defined 2D lamellar morphology with a large porosity and a high specific surface area but also has an efficient light utilization and carriers‐separation and transfer. Moreover, the calculated optimal Gibbs free energy of adsorbed hydrogen (ΔG H* ) for S‐g‐C 3 N 4 ‐D at the S active sites is close to zero (≈0.24 eV) on the basis of first‐principle density functional theory (DFT). Accordingly, the developed S‐g‐C 3 N 4 ‐D catalyst shows a high H 2 evolution rate of 5651.5 µmol g −1 h −1 . Both DFT calculations and experimental results reveal that a memorable defective g‐C 3 N 4 /S‐doped g‐C 3 N 4 step‐scheme heterojunction is constructed between S‐doped domains and N‐defective domains in the structural configuration of S‐g‐C 3 N 4 ‐D. This work exhibits a significant guidance for the design and fabrication of high‐efficiency photocatalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI