Inhibition of CO poisoning on Pt catalyst coupled with the reduction of toxic hexavalent chromium in a dual-functional fuel cell

被引：75

作者：

Chung, Dong Young ^{[1
,2
]}

Kim, Hyoung-il ^{[3
]}

Chung, Young-Hoon ^{[4
]}

Lee, Myeong Jae ^{[1
,2
]}

Yoo, Sung Jong ^{[4
]}

Bokare, Alok D. ^{[3
]}

Choi, Wonyong ^{[3
]}

Sung, Yung-Eun ^{[1
,2
]}

机构：

[1] Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 151742, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea

[3] Pohang Univ Sci & Technol POSTECH, Sch Environm Sci & Engn, Pohang 790784, South Korea

[4] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 136791, South Korea

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

基金：

新加坡国家研究基金会;

关键词：

METHANOL ELECTROOXIDATION; OXIDATION; SULFUR; ELECTROCATALYSIS; CHEMISTRY; SIZE;

D O I：

10.1038/srep07450

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We propose a method to enhance the fuel cell efficiency with the simultaneous removal of toxic heavy metal ions. Carbon monoxide (CO), an intermediate of methanol oxidation that is primarily responsible for Pt catalyst deactivation, can be used as an in-situ reducing agent for hexavalent chromium (Cr (VI)) with reactivating the CO-poisoned Pt catalyst. Using electro-oxidation measurements, the oxidation of adsorbed CO molecules coupled with the concurrent conversion of Cr (VI) to Cr (III) was confirmed. This concept was also successfully applied to a methanol fuel cell to enhance its performance efficiency and to remove toxic Cr (VI) at the same time.

引用

页数：5

共 39 条

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[2] Advanced Oxidation Process Based on the Cr(III)/Cr(VI) Redox Cycle [J].