独特的铜和还原氧化石墨烯纳米复合材料实现了二氧化碳的高效电化学还原。
Unique copper and reduced graphene oxide nanocomposite toward the efficient electrochemical reduction of carbon dioxide.
机构信息
Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada.
出版信息
Sci Rep. 2017 Jun 9;7(1):3184. doi: 10.1038/s41598-017-03601-3.
Abstract
The electrochemical reduction of CO to useful chemicals and fuels has garnered a keen and broad interest. Herein, we report a unique nanocomposite consisting of Cu nanoparticles (NPs) and reduced graphene oxide (rGO) supported on a Cu substrate with a high catalytic activity for CO reduction. The nanocomposite was optimized in terms of the composition of Cu NPs and rGO as well as the overall amount. A gas chromatograph was employed to analyze the gaseous products, whereas a chemical oxygen demand (COD) method was proposed and utilized to quantify the overall liquid products. The optimized nanocomposite could effectively reduce CO to CO, HCOOH and CH with a Faradaic efficiency (FE) of 76.6% at -0.4 V (vs. RHE) in a CO saturated NaHCO solution. The remarkable catalytic activity, high FE, and excellent stability make this Cu-rGO nanocomposite promising for the electrochemical reduction of CO to value-added products to address the pressing environmental and energy challenges.
摘要
电化学还原 CO 生成有价值的化学品和燃料引起了广泛的关注。在此，我们报道了一种独特的纳米复合材料，它由 Cu 纳米粒子（NPs）和还原氧化石墨烯（rGO）负载在 Cu 基底上，对 CO 还原具有高催化活性。该纳米复合材料在 Cu NPs 和 rGO 的组成以及总负载量方面进行了优化。采用气相色谱仪分析气态产物，同时提出并利用化学需氧量（COD）方法定量分析总液体产物。在 CO 饱和的 NaHCO3 溶液中，在-0.4 V（相对于 RHE）下，优化后的纳米复合材料可有效将 CO 还原为 CO、HCOOH 和 CH，法拉第效率（FE）为 76.6%。该纳米复合材料具有显著的催化活性、高 FE 和优异的稳定性，有望用于电化学还原 CO 生成附加值产品，以应对紧迫的环境和能源挑战。
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