Oxygen Reduction Reaction on Metal and Nitrogen-Doped Carbon Electrocatalysts in the Presence of Sodium Borohydride

被引：8
|
作者：
Sgarbi, Ricardo [1 ,2 ]
Ticianelli, Edson A. [2 ]
Maillard, Frederic [1 ]
Jaouen, Frederic [3 ]
Chatenet, Marian [1 ]
机构：
[1] Univ Univ Grenoble Alpes, LEPMI, CNRS, Grenoble INP,Inst Engn, F-38000 Grenoble, France
[2] Univ Sao Paulo, Inst Quim Sao Carlos, Ave Trabalhador Saocarlense 400, BR-13560970 Sao Carlos, SP, Brazil
[3] Univ Montpellier, ENSCM, CNRS, ICGM, Montpellier, France
来源：
ELECTROCATALYSIS | 2020年 / 11卷 / 04期
基金：
巴西圣保罗研究基金会;
关键词：
Metal-nitrogen-doped carbons (M-N-C); Catalyst; Fe-N-C; Co-N-C; Oxygen reduction reaction; Direct borohydride fuel cells; IRON-BASED CATALYSTS; METHANOL FUEL-CELLS; CATHODE CATALYSTS; ANODE ELECTROCATALYSTS; HYDROXIDE ELECTROLYTE; REACTION-MECHANISM; DIRECT OXIDATION; ELECTROOXIDATION; NANOPARTICLES; INSIGHTS;
D O I：
10.1007/s12678-020-00602-1
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：
Metal and nitrogen-doped carbon electrocatalysts (M-N-C, where M is Fe or Co) were investigated for the oxygen reduction reaction (ORR) in alkaline conditions in the presence of borohydride ions (BH4-). The electrochemical properties of the Fe-N-C and Co-N-C catalysts were investigated by cyclic voltammetry and rotating disk electrode techniques: their ORR electrocatalytic activity was bridged to their physicochemical properties, mainly type of metallic center (Fe vs. Co), structure (atomic dispersion vs. nanoparticles), and BET surface area. It is found that Fe-N-C catalysts have the best performances for the ORR electrocatalysis, even in the presence of BH4- anions. The atomically dispersed Fe- and Co-containing electrocatalysts reach better BH4--tolerance than their counterparts baring nanoparticles. For the atomically dispersed Fe-N-C electrocatalysts, the lowest BET surface area material generates a slight advantage of ORR mass activity and a poor (and desired) activity for borohydride oxidation reaction (BOR).
引用
收藏
页码：365 / 373
页数：9
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