On an Easy Way To Prepare Metal Nitrogen Doped Carbon with Exclusive Presence of MeN4-type Sites Active for the ORR

被引：431

作者：

Kramm, Ulrike I. ^{[1
,2
,3
]}

Herrmann-Geppert, Iris ^{[1
]}

Behrends, Jan ^{[4
]}

Lips, Klaus ^{[5
]}

Fiechter, Sebastian ^{[1
]}

Bogdanoff, Peter ^{[1
]}

机构：

[1] Helmholtz Zentrum Berlin Mat & Energie, Inst Solar Fuels, Hahn Meitner Pl 1, D-14109 Berlin, Germany

[2] Tech Univ Darmstadt, Dept Mat, Grad Sch Excellence Energy Sci & Engn, Chair Catalysts & Electrocatalysts, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany

[3] Tech Univ Darmstadt, Dept Earth Sci & Chem, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany

[4] Free Univ Berlin, Dept Phys, BeJEL, Arnimallee 14, D-14195 Berlin, Germany

[5] Helmholtz Zentrum Berlin Mat & Energie, Inst Nanospectroscopy, BeJEL, Albert Einstein Str 15, D-12489 Berlin, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2016年 / 138卷 / 02期

关键词：

OXYGEN REDUCTION REACTION; MEMBRANE FUEL-CELLS; N-C CATALYSTS; CATHODE CATALYSTS; FE/N/C-CATALYSTS; NANOFIBER ELECTRODES; ORGANIC FRAMEWORK; TRANSITION-METAL; O-2; REDUCTION; IRON;

D O I：

10.1021/jacs.5b11015

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Today, most metal and nitrogen doped carbon catalysts for ORR reveal a heterogeneous composition. This can be reasoned by a nonoptimized precursor composition and various steps in the preparation process to get the required active material. The significant presence of inorganic metal species interferes with the assignment of descriptors related to the ORR activity and stability. In this work we present a simple and feasible way to reduce the contribution of inorganic metal species in some cases even down to zero. Such catalysts reveal the desired homogeneous composition of MeN4 (Me = metal) sites in the carbon that is accompanied by a significant enhancement in ORR activity. Among the work of other international groups, our iron-based catalyst comprises the highest density of FeN4 sites ever reported without interference of inorganic metal sites.

引用

页码：635 / 640

页数：6

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