研究目的
Investigating the high-performance hydrogen evolution of MoSe2-Mo2C seamless heterojunction enabled by efficient charge transfer.
研究成果
The Mo2C/MoSe2 heterojunction exhibits excellent electrochemical HER performance in both acidic and alkaline conditions, with low onset potentials and overpotentials. The synergistic integration of Mo2C and MoSe2 enhances charge transfer efficiency and HER activity. The strategy of designing hybrid heterostructures paves the way for developing more efficient HER electrocatalysts.
研究不足
The study focuses on the synthesis and characterization of Mo2C/MoSe2 heterojunction and its HER performance. The scalability and long-term stability under industrial conditions are not addressed.
1：Experimental Design and Method Selection:
The study employs a bottom-up approach to seamlessly grow Mo2C/MoSe2 heterojunction on Mo foil for efficient electrocatalytic hydrogen generation. The methodology includes chemical vapor deposition (CVD) for selenylation and carbonization processes.
2：Sample Selection and Data Sources:
High-purity Mo foil is used as the substrate and molybdenum source. The samples are characterized using SEM, XRD, XPS, HRTEM, and EDS.
3：List of Experimental Equipment and Materials:
Equipment includes a quartz tube furnace, SEM, XRD, XPS, HRTEM, and EDS. Materials include Mo foil, selenium powder, methane gas, and high purity Ar/H
4：Experimental Procedures and Operational Workflow:
The process involves oxidation of Mo foil, selenylation to form MoSe2, carbonization to form Mo2C, and synthesis of Mo2C/MoSe2/Mo composite catalyst. Electrochemical measurements are performed using a three-electrode system.
5：Data Analysis Methods:
Electrochemical performance is evaluated using linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). DFT calculations are used to understand the enhanced catalytic activity.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
Mo foil
Used as conducting electron collection substrate and molybdenum source.
-
selenium powder
Used as the precursor for selenylation.
-
methane gas
Used as the carbon source for carbonization.
-
Ar/H2
Used as the carrier gas for selenylation and carbonization.
-
quartz tube furnace
Used for oxidation, selenylation, and carbonization processes.
-
SEM
Used to detect the morphology of the catalysts.
-
XRD
Used to determine the crystalline phase of the samples.
-
XPS
Used to analyze the element valence of the samples.
-
HRTEM
Used to study the microstructure of the catalysts.
-
EDS
Used to verify the existence of elements in the material.
-
electrochemical workstation
CHI 660E
Used for electrochemical performance measurement.
-
登录查看剩余9件设备及参数对照表
查看全部
