研究目的
Investigating the synthesis and electrocatalytic performance of PtPd/SnO2 nanocatalysts for methanol oxidation.
研究成果
The PtPd/SnO2/GNs composite catalyst exhibits enhanced electrocatalytic performance, cycling stability, and CO-poisoning tolerance for methanol oxidation. The novel one-step plasma technique provides a useful approach for fabricating highly efficient electrocatalysts.
研究不足
The study focuses on the synthesis and performance of PtPd/SnO2/GNs catalysts under specific conditions. The scalability of the plasma technique and the long-term stability of the catalysts under operational conditions are areas for further investigation.
1：Experimental Design and Method Selection:
The synthesis of PtPd/SnO2 nanocatalysts was performed using a solution plasma technique in an aqueous solution of tin(II) chloride with Pt and Pd metal wires as electrodes. PtPd/SnO2/GNs composite catalysts were prepared by ultrasonically mixing PtPd/SnO2 with graphene nanosheets (GNs).
2：Sample Selection and Data Sources:
Platinum (Pt) and palladium (Pd) metal wires were used as electrodes. Tin(II) chloride dihydrate (SnCl2·2H2O) was the solute, and deionized water was the solvent. Graphene nanosheets (GNs) were used as support materials.
3：List of Experimental Equipment and Materials:
High voltage pulsed DC power supply (Kurita Co.Ltd., Japan), TEM (JEOL JEM-2100F), XRD (Rigaka Smartlab system), and EDX spectroscopy (Thermo Fisher NORAN System 7, America).
4：Experimental Procedures and Operational Workflow:
Plasma discharge was generated using a high voltage pulsed DC power supply. The PtPd/SnO2 suspension was mixed with GNs and ultrasonicated to prepare the composite catalyst. The mixture was then dried to obtain PtPd/SnO2/GNs powders.
5：Data Analysis Methods:
The electrocatalytic properties were monitored by CV measurements in acidic and alkaline conditions. CO stripping experiments and photo-electrochemical measurements under light illumination were also conducted.
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TEM
JEOL JEM-2100F
JEOL
Used to study the morphology and microstructure of the as-prepared PtPd/SnO2/GNs.
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XRD
Rigaka Smartlab system
Rigaka
Used to evaluate the crystallinity and phases of the catalysts.
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EDX spectroscopy
Thermo Fisher NORAN System 7
Thermo Fisher
Used to study the compositions of the as-prepared PtPd/SnO2/GNs.
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Platinum metal wire
Sigma-Aldrich
Used as electrode in the synthesis of PtPd/SnO2 nanocatalysts.
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Palladium metal wire
Sigma-Aldrich
Used as electrode in the synthesis of PtPd/SnO2 nanocatalysts.
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Tin(II) chloride dihydrate
Sigma-Aldrich
Solute in the aqueous solution for the synthesis of PtPd/SnO2 nanocatalysts.
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Graphene nanosheets
Nanjing XFNANO Materials Tech Co., Ltd
Support materials for the PtPd/SnO2/GNs composite catalysts.
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High voltage pulsed DC power supply
Kurita Co.Ltd., Japan
Used to generate plasma discharge for the synthesis of PtPd/SnO2 nanocatalysts.
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