N-doped Cdot/PtPd nanonetwork hybrid materials as highly efficient electrocatalysts for methanol oxidation and formic acid oxidation reactions

The improvement of the catalytic performance for methanol and formic acid oxidation reactions remains a key issue for the development of a new generation of direct methanol and formic acid fuel cells. This study reports a simple approach, using selective chemical etching for the synthesis of unique...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-10, Vol.766, p.979-986
Main Authors: Nguyen, Van-Toan, Tran, Quoc Chinh, Quang, Nguyen Duc, Nguyen, Ngoc-Anh, Bui, Van-Tien, Dao, Van-Duong, Choi, Ho-Suk
Format: Article
Language:English
Subjects:
Alloys
Carbon
Catalysis
Catalytic oxidation
Chemical etching
Chemical synthesis
Electrocatalysts
Formic acid
Formic acid oxidation reaction
Fuel cells
Methanol
Methanol oxidation reaction
Nano-network
Nanoparticles
Nitrogen
Nitrogen-doped carbon dot
Organic chemistry
Oxidation
PtPd nanoalloy
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Summary:The improvement of the catalytic performance for methanol and formic acid oxidation reactions remains a key issue for the development of a new generation of direct methanol and formic acid fuel cells. This study reports a simple approach, using selective chemical etching for the synthesis of unique nitrogen-doped carbon dot/Pt84Pd16 (N-Cdot/Pt84Pd16) nano-network structure at room temperature with excellent electrocatalytic properties. The obtained nano-network hybrid material exhibits significant enhancement of the electrocatalytic activity for the electro-oxidation reaction of both methanol and formic acid with current densities of 999.0 and 1919.5 mA/mgmetal, respectively, compared with the commercial ones of 751.32 and 806.02 mA/mgmetal, respectively. Furthermore, the N-Cdot/Pt84Pd16 nano-network hybrid materials exhibit excellent stability and hydrophilic dispersibility at room temperature. [Display omitted] •N-Cdot/PtPd nanonetwork hybrid material is synthesized at room temperature.•A simple coreduction and a selective chemical etching are applied to the synthesis.•It generates a nano-network structure with excellent electrocatalytic properties.•N-Cdot functions as a uniform interconnection between the nanohybrid materials.•The hybrid exhibits significant enhancement of the activity for both MOR and FAOR.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.07.049