标题：Enhanced electrocatalysis performance of amorphous electrolytic carbon from CO2 for oxygen reduction by surface modification in molten salt

作者： Chen, ZG (Chen, Zhigang); Gu, YX (Gu, Yuxing); Du, KF (Du, Kaifa); Wang, X (Wang, Xu); Xiao, W (Xiao, Wei); Mao, XH (Mao, Xuhui); Wang, DH (Wang, Dihua)

来源出版物：ELECTROCHIMICA ACTA 卷：253 页码: 248-256 DOI：10.1016/j.electacta.2017.09.053 出版年： NOV 2017

摘要：The electrolytic carbon (E-carbon) derived from greenhouse gas CO2 in molten carbonates at mild temperature possesses high electrical conductivity and suitable specific surface area. In this work, its potential as catalyst is investigated towards oxygen reduction reaction (ORR). It is revealed that the pristine E-carbon has no electrocatalytic activity for the ORR due to its high surface content of carboxyl group. The carbon was then treated in a Li2SO4 containing Li2CO3-Na2CO3- K2CO3 molten salt at 550 degrees C. Sulfur modified E-carbon was obtained in the melt via a galvanic sulfidation reaction, in which Li2SO4 served as a nontoxic sulfur source and an oxidant. The sulfur modified E-carbon showed a significantly improved electrocatalytic activity. Subsequently, a sulfur/cobalt dual modified carbon with much higher catalysis activity was successfully prepared by treating an E-carbon/CoSO4 composite in the same melt. The dual modified E-carbon showed excellent catalytic performance with activity close to the commercial Pt/C catalyst but a high tolerance towards methanol.

入藏号：WOS:000413011100027

文献类型：Article

语种：English

作者关键词：Oxygen reduction reaction; Electrolytic carbon; Sulfur doped carbon; Sulfur/cobalt dual modified carbon; CO2 sequestration

扩展关键词： METAL-FREE ELECTROCATALYSTS; LITHIUM-ION BATTERIES; DOPED CARBON; ELECTROCHEMICAL CONVERSION; EFFICIENT ELECTROCATALYST; MESOPOROUS CARBON; ACTIVATED CARBON; ANODE MATERIALS; FUEL-CELLS; NANOTUBES

通讯作者地址：Wang, X; Wang, DH (reprint author), Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址：xu.wang@whu.edu.cn; wangdh@whu.edu.cn

地址：[Chen, Zhigang; Gu, Yuxing; Du, Kaifa; Wang, Xu; Xiao, Wei; Mao, Xuhui; Wang, Dihua] Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

ISSN：0013-4686

eISSN: 1873-3859

影响因子：4.798