Quantification of electron transfer on carbon nanotubes: Effect of edge defects on electro-oxidation of glycerol catalyzed by platinum

被引：10

作者：

Ming, Jingyan ^{[1
]}

Fu, Hongquan ^{[2
]}

Yang, Guangxing ^{[3
]}

Wang, Hongjuan ^{[1
]}

Huang, Jiangnan ^{[1
]}

Peng, Feng ^{[3
]}

Cao, Yonghai ^{[1
]}

Yu, Hao ^{[1
]}

机构：

[1] South China Univ Technol, Sch Chem & Chem Engn, Guangdong Prov Key Lab Green Chem Prod Technol, Guangzhou 510641, Peoples R China

[2] China West Normal Univ, Chem Synth & Pollut Control Key Lab Sichuan Prov, Nanchong 637000, Sichuan, Peoples R China

[3] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou Key Lab New Energy & Green Catalysis, Guangzhou 510006, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 455卷

关键词：

Electron transfer; Defect; Carbon nanotubes; Metal -support interaction; Glycerol electrooxidation; SELECTIVE OXIDATION; AEROBIC OXIDATION; OXYGEN REDUCTION; LIQUID-PHASE; ELECTROCATALYTIC ACTIVITY; GRAPHITIC-NITROGEN; CHARGE-TRANSFER; DOPED CARBONS; GRAPHENE; NANOPARTICLES;

D O I：

10.1016/j.cej.2022.140826

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

It is still an ongoing challenge to quantitatively determine the number of transferred electrons from carbon supports to metallic catalysts, which is highly related to their catalytic performance. In this work, a facile method combining electrochemical and spectroscopic technologies was proposed to evaluate the electron transfer (ET) reaction rate on carbon nanotubes (CNTs) with defects. Using 7,7,8,8-tetracyanoquinonedimethane (TCNQ) as an electron-accepting molecule, the transferred electrons from CNTs were quantitatively determined through the Beer-Lambert law and coulometric analysis. It was revealed that the edge defects on CNTs are beneficial for the ET reaction rate, due to the lower local work function. Hence, the defective CNTs supported Pt nanoparticles (Pt/ d-CNTs) performed the higher activity in the electrooxidation of glycerol, suggesting the influence of the ET ability of d-CNTs on the electronic metal-support interaction. This scenario is supported by density function theory calculation and X-ray photoelectron spectroscopy. Our results pave a new way to the facile evaluation of electronic metal-carbon interaction.

引用

页数：9

共 67 条

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