Fully Synthetic Approach toward Transition Metal-Nitrogen-Carbon Oxygen Reduction Electrocatalysts

被引：9

作者：

Gokhale, Rohan ^{[1
]}

Thapa, Surendra ^{[2
]}

Artyushkoya, Kateryna ^{[1
]}

Giri, Ramesh ^{[2
]}

Atanassov, Plamen ^{[1
]}

机构：

[1] Univ New Mexico, CMEM, Albuquerque, NM 87106 USA

[2] Univ New Mexico, Dept Chem, Albuquerque, NM 87106 USA

来源：

ACS APPLIED ENERGY MATERIALS | 2018年 / 1卷 / 08期

关键词：

electrocatalyst; oxygen reduction reaction; XPS; square wave voltammetry; linear sweep voltammetry; transition metal-nitrogen-carbon; ACTIVE-SITES; CATALYST; IRON; IDENTIFICATION; MODEL;

D O I：

10.1021/acsaem.8b00537

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：

We report a nonpyrolytic chemical synthesis of model iron nitrogen carbon electrocatalysts for oxygen reduction reaction (ORR) to elucidate the role of Fe-N centers in the catalysis mechanism. The graphene-supported and unsupported catalysts were analyzed in detail by X-ray spectroscopy techniques. The electrochemical analysis was performed by linear sweep voltammetry and square wave voltammetry in 0.5 M H2SO4 and 0.1 M KOH electrolytes. In this article, with the use of model catalysts, we manifest and confirm the difference in the specific role of Fe-N active sites toward ORR in acidic and alkaline environments.

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收藏

页码：3802 / 3806

页数：9

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