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Porous 3D flower-like bismuth silicate@nitrogen-doped graphene nanomaterial as high-efficient catalyst for fuel cell cathode
- Source :
- Ceramics International. 45:24515-24527
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Three-dimensional (3D) flower-like Bi2SiO5 nanomaterials (FLB) and 3D flower-like Bi2SiO5@nitrogen doped graphene nanomaterials (FLBNG) have been originally synthesized. Notably, as-synthesized FLB and FLBNG nanomaterials have not yet been discussed in previous reports. The FLBNG nanomaterials have been for the first time studied as the cathodic catalysts for Fuel cell. Research results have shown that the FLBNG-2 possesses perfectly 3D flower-like Bi2SiO5 with numerous uniformly coiled nanowires and exhibits good methanol immunity, high activity and high durability during oxygen reduction reaction (ORR) process under acidic and basic electrolytes. The value of onset potential (E0) for FLBNG-2 in alkaline electrolyte can reach to 1.091 V, Tafel slope of FLBNG-2 is 45.637 mV dec−1 and its limiting current density (JL) is 6.49 mA cm−2. Similarly, These ORR performances in acidic electrolyte are also better than those of 20 wt% commercial Pt/C and most of the associated reports. Thus, the FLBNG-2 could be a potential ORR catalyst, applied in the cathode of fuel cells to enhance the kinetic rate, decrease costs and enhance durability. And this synthesis method may be provide a good design to synthesize other 3D flower-like nanomaterials with desirable properties.
- Subjects :
- Materials science
chemistry.chemical_element
02 engineering and technology
Electrolyte
01 natural sciences
Catalysis
Bismuth
Nanomaterials
law.invention
chemistry.chemical_compound
law
0103 physical sciences
Materials Chemistry
010302 applied physics
Tafel equation
Process Chemistry and Technology
Limiting current
021001 nanoscience & nanotechnology
Cathode
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Chemical engineering
chemistry
Ceramics and Composites
Methanol
0210 nano-technology
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........6cf428438488e792b19a6db7c67b91e0