Co Nanoparticles Confined in Mesoporous Mo/N Co‐Doped Polyhedral Carbon Frameworks towards High‐Efficiency Oxygen Reduction. Issue 23 (16th March 2023)

• Record Type: Journal Article
• Authors: Wang, Tianwei; Gao, Sanshuang; Wei, Tianran; Qin, Yongji; Zhang, Shusheng; Ding, Junyang; Liu, Qian; Luo, Jun; Liu, Xijun
• Is Part Of: Chemistry. Volume 29:Issue 23(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-03-16
• Subjects: heteroatom doping -- mesoporous -- metal-organic framework -- oxygen reduction reaction -- synergistic effect; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202204034
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Exploiting effective non‐noble metal electrocatalysts for oxygen reduction reaction (ORR) is crucial for fuel cells and metal‐air batteries. Herein, we designed and fabricated Co nanoparticles confined in Mo/N co‐doped polyhedral carbon frameworks (Co‐NP/MNCF) derived from polyoxometalate‐encapsuled metal–organic framework, which showed comparable ORR performance with commercial Pt/C and a larger diffusion‐limited current density. Moreover, the Co‐NP/MNCF also exhibited excellent ORR stability and methanol tolerance. These appealing performances can be attributed to the porosity regulation and heteroatom doping of metal–organic framework derived polyhedral carbon frameworks, which could be beneficial for the exposure of more active sites, the optimization of electronic structure and the mass transfer of electrolyte/electron/ion. Abstract : In this work, Co nanoparticles were confined in the mesoporous Mo/N co‐doped polyhedral carbon frameworks, which showed enhanced ORR performances due to the formation of mesoporous structures induced by PMo.