DOI: 10.1016/j.jcou.2017.02.005
Scopus记录号: 2-s2.0-85013794342
论文题名: Transformation of the greenhouse gas CO2 by molten electrolysis into a wide controlled selection of carbon nanotubes
作者: Ren J. ; Johnson M. ; Singhal R. ; Licht J.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 18 起始页码: 335
结束页码: 344
语种: 英语
英文关键词: Boron doping
; Carbon nanotubes
; Conductivity
; Electrosynthesis
; Global warming
Scopus关键词: Anodes
; Calcium carbonate
; Carbon dioxide
; Carbon nanofibers
; Cost reduction
; Costs
; Electric conductivity
; Electrodes
; Electrolysis
; Electrolytes
; Global warming
; Greenhouse gases
; Nanotubes
; Thin walled structures
; Yarn
; Boron-doping
; Carbonate electrolytes
; Controlled nanostructures
; Economic incentive
; Electrolysis time
; Electrolyte density
; Electrolytic oxides
; Electrosynthesis
; Carbon nanotubes
英文摘要: This paper demonstrates a highly favored route for the synthesis of controlled nanostructures at high rate, high yield, and low cost by molten carbonate electrolysis splitting of CO2. We show the wide, portfolio of carbon nanotubes (CNTs) that can be produced by controlling the electrolysis conditions in this one-pot synthesis. For example solid core carbon nanofibers are formed with C-13 isotope CO2, whereas hollow core CNTs are formed with natural abundance CO2 (which contains 99% C-12 and 1% C-13). Shown are the first doped electrosynthesized carbon nanotubes, prepared with added electrolytic LiBO2 for boron doping, and salts for phosphorous, nitrogen or sulfur CNT doping is probed. Boron doping greatly enhances conductivity of the CNTs. Electrolytic CaCO3 produces thin-walled CNTs, while excess electrolytic oxide yields tangled CNTs. Addition of up to 50 mol% Na2CO3 to a Li2CO3 electrolyte, decreases electrolyte costs and improves conditions for intercalation in Na-ion CNT anodes. Addition of BaCO3 increases electrolyte density. Longer electrolysis time leads to proportionally wider diameter CNTs. Synthetic components (steel cathode, nickel anode and inorganic carbonate electrolyte) are available and inexpensive. Advantages include (1) production is limited only by the cost of electrons (electricity) providing a substantial cost reduction compared to conventional CVD and polymer spinning syntheses and (2) the only reactant consumed in the formation of the CNTs is CO2, transforming this greenhouse gas into a stable, valuable product and providing an economic incentive to the removal of anthropogenic CO2 from flue gas or from the atmosphere. © 2017 Published by Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52794
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Ren J.,Johnson M.,Singhal R.,et al. Transformation of the greenhouse gas CO2 by molten electrolysis into a wide controlled selection of carbon nanotubes[J]. Journal of CO2 Utilization,2017-01-01,18