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Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
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Cu@Pd/C with Controllable Pd Dispersion as a Highly Efficient Catalyst for Hydrogen Evolution from Ammonia Borane
Yanliang Yang1, Ying Duan2, Dongsheng Deng1
1Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China.
Nanomaterials (Basel, Switzerland)
|September 19, 2020
Summary
New Cu@Pd/C catalysts offer enhanced hydrogen evolution from ammonia borane. Pulse oxidation controls palladium dispersion on copper nanoparticles, improving catalytic activity and stability.
Area of Science:
- Materials Science
- Catalysis
- Nanotechnology
Background:
- Developing efficient catalysts for hydrogen evolution from ammonia borane is crucial for clean energy applications.
- Controlling the dispersion of bimetallic nanoparticles on supports is key to enhancing catalytic performance.
Purpose of the Study:
- To synthesize and characterize novel Cu@Pd/C catalysts with controlled palladium dispersion.
- To investigate the effect of pulse oxidation on copper surface oxidation and subsequent palladium dispersion.
- To evaluate the catalytic activity and stability of the synthesized catalysts for hydrogen evolution from ammonia borane.
Main Methods:
- Galvanic reduction method using pulse oxidation to prepare Cu@Pd/C catalysts with varying palladium content.
- Extensive characterization using TEM, HRTEM, HAADF-STEM, EDS mapping, XRD, XPS, AES, and ICP-OES.
- Testing catalytic performance for hydrogen evolution from ammonia borane at 298 K.
Main Results:
- Cu@Pd/C catalysts exhibited significantly higher activity compared to conventionally prepared PdCu/C.
- Pulse oxidation effectively controlled palladium dispersion by utilizing Cu(I) and Cu2O on the Cu/C surface.
- The maximum turnover frequency (TOF) reached 465 molH2 min-1 molPd-1 on Cu@Pd0.5/C-640.
- The catalysts demonstrated strong stability over five continuous reaction cycles.
Conclusions:
- Pulse oxidation is an effective strategy for tuning palladium dispersion and enhancing catalytic activity.
- The synthesized Cu@Pd/C catalysts show great promise for efficient hydrogen generation from ammonia borane.
- The controlled nanostructure of Cu@Pd/C contributes to its superior catalytic performance and stability.
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