Carbon quantum dots/SnO2-Co3O4 composite for highly efficient electrochemical water oxidation

被引：111

作者：

Zhao, Shunyan ^{[1
]}

Li, Chuanxi ^{[1
]}

Liu, Juan ^{[1
]}

Liu, Naiyun ^{[1
]}

Qiao, Shi ^{[1
]}

Han, Yuzhi ^{[1
]}

Huang, Hui ^{[1
]}

Liu, Yang ^{[1
]}

Kang, Zhenhui ^{[1
]}

机构：

[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Jiangsu, Peoples R China

来源：

CARBON | 2015年 / 92卷

基金：

中国国家自然科学基金;

关键词：

ENHANCED PHOTOCATALYTIC ACTIVITY; CATALYTIC-ACTIVITY; COBALT-OXIDE; EVOLUTION; DOTS; PERFORMANCE; ANODES; NANOPARTICLES; HYDROXIDE; NANODOTS;

D O I：

10.1016/j.carbon.2015.03.002

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：

Nanocomposites based on transition metal oxides (Co3O4, etc.) and carbon nanostructures with low-cost, high activity and good stability are promising catalysts toward electrochemical water oxidation, which is desirable but remains challenging. Here, we report the design and synthesis of nanocomposite based on carbon quantum dots (CQDs), SnO2 and CO3O4 (CQDs/SnO2-Co3O4) as the electrocatalyst for highly efficient oxygen evolution reaction (OER). In alkaline media, the complex exhibited high electrocatalytic activity and long-term stability, which was better than either pristine Co3O4 or SnO2-Co3O4 composite. Moreover, the CQDs/SnO2-Co3O4 with a molar ratio of Sn:Co at 1:3 revealed the highest catalytic activity toward OER among different molar ratios of CQDs/SnO2-Co3O4 composites. Experimental results indicated that the Co atoms were considered as the active centre, the nano-sized SnO2 enhanced electronic conductivity and the insoluble CQDs layer on the surface effectively protected the catalyst, thus the composite structure resulted in the excellent electrocatalytic activity and high stability. (C) 2015 Published by Elsevier Ltd.

引用

页码：64 / 73

页数：10

共 43 条

[41] Carbon quantum dots/Ag3PO4 complex photocatalysts with enhanced photocatalytic activity and stability under visible light [J].