Supportive activity of Pt nanoparticles on the nitrogen‐doped graphene nanosheet with vacancy defects for catalyzing neutral glucose oxidation. (1st February 2022)

• Record Type: Journal Article
• Authors: Wang, Tzu‐Pei; Tsou, Ping‐Yuan; Lee, Chien‐Liang
• Is Part Of: International journal of energy research. Volume 46:Number 6(2022)
• Page Start: 8491
• Page End: 8502
• Publication Date: 2022-02-01
• Subjects: electrochemical exfoliation -- EQCM -- glucose electrooxidation -- N‐doped graphene -- nonenzymatic glucose sensor -- reduced graphene oxides -- sonoelectrochemical exfoliation -- vacancy defects; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.7710
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: Catalyst support alters the electronic structure of metal catalysts, resulting in an enhanced activity. In this study, nitrogen‐doped defective graphene nanosheet‐supported Pt nanoparticles (2.8 nm) (Pt/N‐dGN) were prepared and successfully used as electrocatalysts in the sequential and transient catalysis of the neutral d ‐glucose oxidation reaction (GOR). The Pt nanoparticles were determined to be single crystals enclosed with the (110) plane. The spherical‐aberration‐corrected field transmission electron microscopy image revealed a Pt/N‐dGN bearing with point vacancies, 5‐8‐5, 5‐9, and 5‐7‐7‐5 defects. N‐dGN was prepared by fast exfoliation and sequential nitrogen doping with urea using a sonoelectrochemical and hydrothermal method. The Pt/N‐dGN with a Pt binding energy of 71.4 eV showed significant mass activity (7.83 × 10 19 molecules g −1 Pt ) toward the sequential catalysis of neutral GOR. The electron transfer number was 2.71 and approximately two‐electron transfer mechanisms occurred. The repeated currents of GORs were observed in the catalysis from the 2nd cycle to the 25th cycle. Abstract : Catalyst support alters the electronic structure of metal catalysts, resulting in an enhanced activity. In this study, nitrogen‐doped defective graphene nanosheet‐supported Pt nanoparticles (2.8 nm) (Pt/N‐dGN) were prepared and successfully used as electrocatalysts in the sequential and transient catalysis of the neutral d ‐glucose oxidation reaction (GOR). The Pt/N‐dGN with point vacancies, 5‐8‐5, 5‐9, and 5‐7‐7‐5 defects showed significant mass activity (7.83 × 10 19 molecules g −1 Pt ) toward the sequential catalysis of neutral GOR.