One-step production of Pt-CeO2/N-CNTs electrocatalysts with high catalytic performance toward methanol oxidation

被引：20

作者：

Yu, Yunqi ^{[1
]}

He, Jianting ^{[1
]}

Wang, Tong ^{[1
]}

Qiu, Xinsheng ^{[1
]}

Chen, Kangcheng ^{[1
]}

Wu, Qin ^{[1
]}

Shi, Daxin ^{[1
]}

Zhang, Yaoyuan ^{[1
]}

Li, Hansheng ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Chem & Chem Engn, Beijing 100081, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2023年 / 48卷 / 76期

关键词：

Methanol electrocatalytic oxidation; Alkali concentration nitrogen-doped; carbon nanotubes; Synergistic effect; DOPED CARBON NANOTUBES; EFFICIENT OXYGEN REDUCTION; HYDROGEN EVOLUTION; RATIONAL DESIGN; GRAPHENE OXIDE; NITROGEN; NANOPARTICLES; NANOCRYSTALS; COMPOSITE; ANODE;

D O I：

10.1016/j.ijhydene.2023.04.137

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：

Nitrogen-doped carbon nanotubes (N-CNTs) prepared by carbonization of polypyrrole nanotubes (PPy-NTs) are used as supports. Pt-CeO2/N-CNTs electrocatalysts are successfully prepared by in-situ growth of Pt and CeO2 nanoparticles (NPs) via a one-step coupling method of co-deposition and ethylene glycol reduction. Through structural characterization and electrochemical tests of the prepared electrocatalysts, the effects of preparation conditions on the structure of the electrocatalysts and their electrocatalytic activity for methanol oxidation were systematically investigated. The results verify that the Pt-CeO2/ N-CNTs electrocatalysts were prepared using N-CNTs calcined at 700 & DEG;C as a support and 15 mM alkali concentration. They have the largest electrochemical active area and methanol oxidation mass activity of 85 m2 g-1(Pt) and 722 A g-1(Pt), respectively. Furthermore, the electrochemical stability and anti-CO poisoning performance of the electrocatalysts are significantly better than those of the commercial Pt/C electrocatalysts. The highlydispersed Pt and CeO2 in Pt-CeO2/N-CNTs, a large number of N sites, and the synergistic action of Pt, CeO2, and N-CNTs result in a catalyst with excellent electrocatalytic activity, stability, and resistance to CO poisoning. The support structure and the dispersion of Pt

引用

页码：29565 / 29582

页数：18

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