Bio-inspired highly active catalysts for oxygen reduction reaction in alkaline electrolyte

被引：6

作者：

Liu, Sisi ^{[1
,2
]}

Deng, Chengwei ^{[1
,2
]}

Yao, Lan ^{[1
,2
]}

Zhong, Hexiang ^{[1
]}

Zhang, Huamin ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 24期

基金：

中国国家自然科学基金;

关键词：

Bio-based catalyst; Oxygen reduction reaction; Methanol tolerance; Direct methanol alkaline fuel cells; ORDERED MESOPOROUS CARBONS; PYROLYZED VITAMIN-B12; NITROGEN; ELECTROCATALYSTS; GRAPHENE;

D O I：

10.1016/j.ijhydene.2014.06.066

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：

A novel non-platinum oxygen reduction reaction (ORR) catalyst was synthesised by the pyrolysis of carbon-supported vitamin B12 under ammonia atmosphere. The resultant catalyst was characterised by transmission electron microscopy (TEM), scanning TEM (STEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) analyses. Results demonstrated that the catalyst had a spherical structure. XPS revealed that the nitrogen configuration was changed after pyrolysis, and nitrogen species played a key role in catalysing the ORR. The catalyst exhibited an enhanced ORR activity than commercial 20% Pt/C in alkaline media. The catalyst had an electron transfer number of 3.9, which was very close to the ideal theoretical value of 4. Moreover, the catalyst displayed superior methanol tolerance to Pt/C in alkaline medium, demonstrating its potential application as a cost-effective catalyst for direct methanol alkaline fuel cells. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：12613 / 12619

页数：7

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