Porous 3D flower-like bismuth silicate@nitrogen-doped graphene nanomaterial as high-efficient catalyst for fuel cell cathode. Issue 18 (15th December 2019)

• Record Type: Journal Article
• Authors: Qin, Xiulan; Huang, Ying; Shen, Yuanyuan; Zhao, Ming; Gao, Xiaogang
• Is Part Of: Ceramics international. Volume 45:Issue 18(2019)Part A
• Page Start: 24515
• Page End: 24527
• Publication Date: 2019-12-15
• Subjects: Fuel cells and oxygen/air batteries -- Bi2SiO5 bismuth silicate -- Nitrogen-doped graphene -- Porous 3D flower-like structure -- Oxygen reduction reaction; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.08.179
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Three-dimensional (3D) flower-like Bi2 SiO5 nanomaterials (FLB) and 3D flower-like Bi2 SiO5 @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 Bi2 SiO5 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.