Nitrogen-doped three-dimensional graphene-supported platinum catalysts for polymer electrolyte membrane fuel cells application

2018 ◽  
Vol 11 (01) ◽  
pp. 1850015 ◽  
Author(s):  
Fuqiang Chu ◽  
Xingxing Li ◽  
Wensen Yuan ◽  
Huanhuan Zhu ◽  
Yong Qin ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Three Dimensional ◽  
Pt Nanoparticles ◽  
Reduction Reaction ◽  
Nitrogen Doped ◽  
Electrolyte Membrane ◽  
Supported Platinum ◽  
Supported Platinum Catalysts

Catalysts are a key component of polymer electrolyte membrane fuel cells (PEMFCs). In this work, nitrogen-doped three-dimensional graphene-supported platinum (Pt-3DNG) catalysts are successfully prepared and characterized. SEM and TEM images show the Pt nanoparticles are uniformly dispersed in the sheets of nitrogen-doped 3DNG. Compared with that of the commercial Pt/C catalysts, Pt-3DNG show much better oxygen reduction reaction (ORR) activity and cycling stability, and the reduction in limit current density after 1000 cycles is only about 1.6% for the Pt-3DNG catalysts, whereas 7.2% for the commercial Pt/C catalysts. The single cell using Pt-3DNG catalysts in both the anode and the cathode show a higher peak power density (21.47[Formula: see text]mW cm[Formula: see text] than that using commercial Pt/C catalysts (20.17[Formula: see text]mW cm[Formula: see text] under the same conditions. These properties make this type of catalyst suitable for the application in PEMFCs.

scholarly journals Enhanced Performance of Pt Nanoparticles on Ni-N Co-Doped Graphitized Carbon for Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cells

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 909
Author(s):  
Won-Suk Jung
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Pt Nanoparticles ◽  
Reduction Reaction ◽  
Graphitic Carbon ◽  
Pt Catalyst ◽  
Electrolyte Membrane

Since the reaction rate and cost for cathodic catalyst in polymer electrolyte membrane fuel cells are obstacles for commercialization, the high-performance catalyst for oxygen reduction reaction is necessary. The Ni encapsulated with N-doped graphitic carbon (Ni@NGC) prepared with ethylenediamine and carbon black is employed as an efficient support for the oxygen reduction reaction. Characterizations show that the Ni@NGC has a large surface area and mesoporous structure that is suitable to the support for the Pt catalyst. The catalyst structure is identified and the size of Pt nanoparticles distributed in the narrow range of 2–3 nm. Four different nitrogen species are doped properly into graphitic carbon structure. The Pt/Ni@NGC shows higher performance than the commercial Pt/C catalyst in an acidic electrolyte. The mass activity of the Pt/Ni@NGC in fuel cell tests exhibits over 1.5 times higher than that of commercial Pt/C catalyst. The Pt/Ni@NGC catalyst at low Pt loading exhibits 47% higher maximum power density than the Pt/C catalyst under H2-air atmosphere. These results indicate that the Ni@NGC as a support is significantly beneficial to improving activity.

Oxygenophilic ionic liquids promote the oxygen reduction reaction in Pt-free carbon electrocatalysts

2017 ◽  
Vol 4 (5) ◽  
pp. 895-899 ◽  
Author(s):  
Mo Qiao ◽  
Cheng Tang ◽  
Liviu Cristian Tanase ◽  
Cristian Mihail Teodorescu ◽  
Chengmeng Chen ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Polymer Electrolyte ◽  
Surface Properties ◽  
Polymer Electrolyte Membrane ◽  
Reduction Reaction ◽  
Alkaline Fuel Cells ◽  
Electrolyte Membrane

We propose a novel idea to improve the surface properties of carbon-based Pt-free electrocatalysts in Polymer Electrolyte Membrane Fuel Cells (PEMFCs) and Alkaline Fuel Cells (AFCs).

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