Direct Conversion of Greenhouse Gas CO2 into Graphene via Molten Salts Electrolysis

被引：100

作者：

Hu, Liwen ^{[1
]}

Song, Yang ^{[1
]}

Jiao, Shuqiang ^{[1
]}

Liu, Yingjun ^{[2
]}

Ge, Jianbang ^{[1
]}

Jiao, Handong ^{[1
]}

Zhu, Jun ^{[1
]}

Wang, Junxiang ^{[1
]}

Zhu, Hongmin ^{[1
]}

Fray, Derek J. ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China

[2] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

来源：

CHEMSUSCHEM | 2016年 / 9卷 / 06期

基金：

中国国家自然科学基金;

关键词：

carbon dioxide; electrochemistry; graphene; molten salt; reduction; SQUARE-WAVE VOLTAMMETRY; FEW-LAYER GRAPHENE; ELECTROCHEMICAL REDUCTION; GRAPHITE OXIDE; HIGH-QUALITY; LARGE-AREA; CARBON; FILMS; EXFOLIATION; TEMPERATURE;

D O I：

10.1002/cssc.201501591

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Producing graphene through the electrochemical reduction of CO2 remains a great challenge, which requires precise control of the reaction kinetics, such as diffusivities of multiple ions, solubility of various gases, and the nucleation/growth of carbon on a surface. Here, graphene was successfully created from the greenhouse gas CO2 using molten salts. The results showed that CO2 could be effectively fixed by oxygen ions in CaCl2-NaCl-CaO melts to form carbonate ions, and subsequently electrochemically split into graphene on a stainless steel cathode; O-2 gas was produced at the RuO2-TiO2 inert anode. The formation of graphene in this manner can be ascribed to the catalysis of active Fe, Ni, and Cu atoms at the surface of the cathode and the microexplosion effect through evolution of CO in between graphite layers. This finding may lead to a new generation of proceedures for the synthesis of high value-added products from CO2, which may also contribute to the establishment of a low-carbon and sustainable world.

引用

页码：588 / 594

页数：7

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