n -石墨烯片堆/Cu电催化剂用于二氧化碳还原成乙烯

P. Lesnicenoks, A. Knoks, S. Piskunov, Laimonis Jēkabsons, J. Kleperis
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引用次数: 2

摘要

可再生能源(风能、太阳能)是不可预测的,因此明智的做法是将它们产生的电力储存在能量载体x中。各种PtX(向有用的能源密集型原材料(如氢、合成天然气、燃料)发电)的应用已经提出。我们工作的核心是广泛应用的理念,即利用可再生能源(如太阳能、风能、水力发电)的电力,将沼气厂剩余的二氧化碳转化为高级碳氢化合物。具体目标是生产乙烯——塑料工业中急需的碳氢化合物。该过程本身是在电催化碳/铜阴极上实现的,该阴极必须选择性地反应:2CO2 + 12e−+ 12H+→C2H4 + 4H2O。我们提出了一种自下而上的方法,从最小的颗粒-涂有金属铜纳米晶体的石墨烯片堆(GSS)构建催化剂。复合GSS- cu结构作为CO2和质子的吸收剂,促进cu -纳米簇/GSS上的加氢和碳-碳偶联反应生成C2H4。在我们的设计中,电催化电极由氮掺杂石墨烯片堆制成,并涂覆铜纳米结构。n - gssi本身可以滴铸或电泳结合到碳纸和气体扩散电极。电化学沉积法是在导电碳衬底上生长铜纳米晶体的一种成功方法。采用质谱仪研究了CO2电催化重整阴极上的气态产物,并用SEM/EDS和XRD对电极表面进行了分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
N-Graphene Sheet Stacks/Cu Electrocatalyst for CO2 Reduction to Ethylene
Renewable energy resources (wind, solar) are unpredictable, so it is wise to store the electricity they generate in an energy carrier X. Various PtX (power to useful energy-intensive raw material such as hydrogen, synthetic natural gas, fuel) applications have been proposed. At the heart of our work is widely used idea to convert residual CO2 from biogas plant into higher hydrocarbons using electricity from renewables (e.g., sun, wind, hydro). The specific goal is to produce ethylene-highly demanded hydrocarbon in plastics industry. The process itself is realised on electrocatalytic carbon/copper cathode which must be selective to reaction: 2CO2 + 12e− + 12H+→C2H4 + 4H2O. We propose a bottom-up approach to build catalyst from the smallest particles-graphene sheet stacks (GSS) coated with metallic copper nanocrystals. Composite GSS-Cu structure functions as a CO2 and proton absorber, facilitating hydrogenation and carbon–carbon coupling reactions on Cu-nanocluster/GSS for the formation of C2H4. In our design electrocatalytic electrode is made from nitrogen-doped graphene sheet stacks coated with copper nanostructures. The N-GSSitself can be drop-casted or electrophoretically incorporated onto the carbon paper and gas diffusion electrode. Electrochemical deposition method was recognized as successful and most promising to grow Cu nanocrystals on N-GSS incorporated in conducting carbon substrate. Gaseous products from CO2 electro-catalytic reformation on the cathode were investigated by mass-spectrometer but the electrode surface was analysed by SEM/EDS and XRD methods.
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CiteScore
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