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Unprecedented Lower Over-potential for CO2 Electro-reduction on Copper oxide Anchored to Graphene Oxide Microstructures
Journal of CO2 Utilization ( IF 7.7 ) Pub Date : 2020-04-30 , DOI: 10.1016/j.jcou.2020.101178
Nusrat Rashid , Mohsin Ahmad Bhat , Anirban Das , Pravin P. Ingole

Efficient conversion of CO2 into chemical feedstock and fuels via electrochemical carbon dioxide reduction reaction (ECO2R) has perpetuated ambitious and broad research interests. Herein, we report the design and synthesis of copper oxide anchored to graphene oxide (Cu/CuxO.GO) porous microstructures via a simple and atom-economical DC electrophoresis approach that exhibit excellent electro-catalytic activity toward ECO2R. A systematic rationalisation of the several physico-chemical parameters associated with the fabrication of porous Cu/CuxO.GO network, viz. composition, the extent of defects in GO and the proportion of oxide contents in Cu/CuxO was explored to understand their impact on the electro-catalytic activity of copper plus GO-based composites. The porous and asymmetric Cu/CuxO.GO nano-composite with optimised oxide content, and metal-GO interactions exhibit an excellent activity for CO2 electroreduction into CO and ethane with a respective Faradaic efficiency (F.E.) of ca. 40% and 4% at an applied potential of just -0.28 V (vs NHE) in a CO2 saturated acetonitrile solution. Comparison of the overpotential specific F.E. values with the ones reported for similar investigations suggests that the electro-catalytic performance of the Cu/CuxO.GO network is significantly better than that observed for various state of the art electro-catalysts recently designed for the ECO2R.



中文翻译:

固定在氧化石墨烯微结构上的氧化铜上空前的CO 2电还原的较低过电势

通过电化学二氧化碳还原反应(ECO 2 R)将CO 2有效转化为化学原料和燃料已引起了雄心勃勃的广泛研究兴趣。本文中,我们报告了一种通过简单且原子经济的DC电泳方法设计和合成锚固在氧化石墨烯(Cu / Cu x O.GO)多孔微结构上的氧化铜的方法,该方法对ECO 2 R表现出优异的电催化活性。与多孔Cu / Cu x O.GO网络的制造相关的几个理化参数的合理化,即。组成,GO缺陷程度和Cu / Cu x中氧化物含量的比例探索了O,以了解它们对铜加GO基复合材料的电催化活性的影响。具有优化的氧化物含量的多孔且不对称的Cu / Cu x O.GO纳米复合材料,以及金属-GO相互作用显示出出色的CO 2电还原为CO和乙烷的活性,各自的法拉第效率(FE)为。在CO 2饱和乙腈溶液中施加的电位仅为-0.28 V(vs NHE)时分别为40%和4%。将超电势特定的FE值与类似研究报告的FE值进行比较表明,Cu / Cu x的电催化性能O.GO网络明显优于最近针对ECO 2 R设计的各种先进电催化剂所观察到的网络。

更新日期:2020-04-30
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