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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
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Single transition metal-decorated C4N/MoS2 heterostructure for boosting oxygen reduction, oxygen evolution, and
Qifang Liu1, Xiuyun Zhao2, Xin Chen3
1Center for Computational Chemistry and Molecular Simulation, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
Journal of Colloid and Interface Science
|June 16, 2023
Summary
This study explores metal-decorated C4N/MoS2 as multifunctional electrocatalysts for green energy technologies. Palladium-decorated catalysts show excellent bifunctional performance, while Rhodium-decorated catalysts demonstrate promising trifunctional activity.
Area of Science:
- Materials Science
- Electrochemistry
- Computational Chemistry
Background:
- Development of efficient electrocatalysts is crucial for green energy conversion and storage.
- Multifunctional catalysts are needed for oxygen reduction (ORR), oxygen evolution (OER), and hydrogen evolution (HER).
Purpose of the Study:
- To computationally investigate the ORR, OER, and HER catalytic performance of pristine and metal-decorated C4N/MoS2 (TM-C4N/MoS2).
- To identify promising catalysts for multifunctional applications in energy technologies.
Main Methods:
- Density functional theory (DFT) calculations were employed.
- The catalytic performance of pristine and various metal-decorated C4N/MoS2 structures was systematically evaluated.
- Structure-activity relationships were analyzed using electronic structure and descriptor correlations.
Main Results:
- Pd-C4N/MoS2 exhibited excellent bifunctional ORR/OER catalytic activity with low overpotentials (0.34 V for ORR, 0.40 V for OER).
- Rh-C4N/MoS2 showed potential as a trifunctional catalyst with low ORR/OER/HER overpotentials (0.48 V, 0.55 V, -0.16 V, respectively), though stability needs improvement.
- A strong correlation between the intrinsic descriptor (φ) and adsorption free energy of *OH was found, influencing catalytic activity.
- Electronic structure analysis revealed that tunable adsorption of reaction intermediates enhances catalytic activity.
Conclusions:
- Metal-decorated C4N/MoS2 holds significant promise as a multifunctional electrocatalyst for green energy applications.
- The study provides insights into designing high-activity catalysts by correlating electronic properties with catalytic performance.
- Further research on electrochemical stability is recommended for promising trifunctional catalysts like Rh-C4N/MoS2.
Keywords:
Catalytic activityDensity functional theoryHeterojunctionMultifunctional electrocatalystSingle atom catalystMore Related Videos
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