Pt-CoN supported on TiN-modified carbon nanotubes (Pt-CoN/TiN-CNT) as efficient oxygen reduction reaction catalysts in acidic medium

被引：14

作者：

Chen, Shengzhou ^{[1
]}

Huang, Qiuchan ^{[1
]}

Yang, Wei ^{[1
]}

Zou, Hanbo ^{[2
]}

Mai, Huangwang ^{[1
]}

Wang, JiaHai ^{[2
]}

机构：

[1] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou, Guangdong, Peoples R China

[2] Guangzhou Univ, Guangzhou Key Lab New Energy & Green Catalysis, Guangzhou, Guangdong, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2018年 / 43卷 / 31期

关键词：

Oxygen reduction reaction; Electrocatalyst; Direct methanol fuel cell; Low-Pt loading; TiN; HIGH-PERFORMANCE; ELECTROCATALYTIC ACTIVITY; ALLOY; COMPOSITE; ALKALINE; ELECTROREDUCTION; NANOPARTICLES; NANOFIBER;

D O I：

10.1016/j.ijhydene.2018.06.003

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：

Herein, new catalysts for the oxygen reduction reaction (ORR) (Pt-CoN nanoparticles supported on TiN carbon nanotubes (CNTs)) were successfully prepared via the simple polymerized complex method and heat treatment in NH3. Through this facile two-step synthesis, metal chlorides were first transformed to the corresponding oxides, then reduced to metal particles or nitrides. The synthesized Pt-CoN/TiN-CNT electrocatalysts showed excellent electrochemical activity for oxygen reduction and high tolerance against methanol in acidic medium. The ORR onset potential of Pt0.3CoN/TiN-CNT (0.812 V vs. RHE) is higher than that of 40 wt% commercial Pt/C (0.789 V vs. RHE) due to the synergistic effect between nano-platinum particles and metal nitrides. The TiN-coated CNT support provided high electron transfer rate and catalytic tolerance in methanol solution. The number of transferred electrons was examined by rotating ring-disk electrode measurements, which concurred with the result of the Koutecky-Levich equation for a four electron mechanism. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：14337 / 14346

页数：10

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