Microwave assisted synthesis of nitrogen doped and oxygen functionalized carbon nano onions supported palladium nanoparticles as hybrid anodic electrocatalysts for direct alkaline ethanol fuel cells

被引：35

作者：

Sikeyi, Ludwe L. ^{[1
]}

Ntuli, Themba D. ^{[1
,4
]}

Mongwe, Thomas H. ^{[1
,4
]}

Maxakato, Nobanathi W. ^{[2
]}

Carleschi, Emanuela ^{[3
]}

Doyle, Bryan P. ^{[3
]}

Coville, Neil J. ^{[1
,4
]}

Maubane-Nkadimeng, Manoko S. ^{[1
,4
,5
]}

机构：

[1] Univ Witwatersrand, Sch Chem, Mol Sci Inst, ZA-2050 Braamfontein, South Africa

[2] Univ Johannesburg, Dept Chem Sci, ZA-2021 Doornfontein, South Africa

[3] Univ Johannesburg, Dept Phys, ZA-2006 Auckland Pk, South Africa

[4] Univ Witwatersrand, DSI NRF Ctr Excellence Strong Mat, ZA-2050 Braamfontein, South Africa

[5] Univ Witwatersrand, Microscopy & Microanal Unit, ZA-2050 Braamfontein, South Africa

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 18期

基金：

芬兰科学院; 新加坡国家研究基金会;

关键词：

Carbon nano onions; Cyclic voltammetry; Chronoamperometry; Direct ethanol fuel cells; Electrocatalysts; Electrochemical impedance spectroscopy; REDUCTION REACTION; CATALYTIC-ACTIVITY; PD; OXIDATION; METHANOL; NANOSTRUCTURES; PERFORMANCE; PYROLYSIS; NANOTUBES; CHEMISTRY;

D O I：

10.1016/j.ijhydene.2020.12.154

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, we present the synthesis of pristine carbon (p-CNO), nitrogen doped (N-CNO) and oxygen functionalized (ox-CNO) nano onions, using flame pyrolysis, chemical vapour deposition, and reflux methods, respectively. Pd/p-CNO, Pd/N-CNO and Pd/ox-CNO electrocatalysts are prepared using a simple and quick microwave-assisted synthesis method. The various CNO and Pd/CNO electrocatalysts are fully characterized and the FTIR and XPS results reveal that the synthesized CNOs contain oxygen and nitrogen functional groups that facilitates the attachment and dispersion of the Pd nanoparticles. Electrochemical tests show that the N-CNO and Pd/N-CNO electrocatalysts exhibit high current density (4.2 mA cm(-2) and 17.4 mA cm(-2)), long-term stability (1.2 mA cm(-2) and 6.9 mA cm(-2)), and fast electron transfer when compared to the equivalent pristine and oxidized catalysts (and their Pd counterparts), and a commercial Pd/C electrocatalyst, towards ethanol oxidation reactions in alkaline medium. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：10862 / 10875

页数：14

共 74 条

[1] A review of carbon quantum dots and their applications in wastewater treatment [J].