Photoelectrocatalytic Reduction of CO2 into Chemicals Using Pt-Modified Reduced Graphene Oxide Combined with Pt-Modified TiO2 Nanotubes

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• 作者：Jun Cheng ; Meng Zhang ; Gai Wu ; Xin Wang ; Junhu Zhou ; Kefa Cen
• 刊名：Environmental Science & Technology
• 出版年：2014
• 出版时间：June 17, 2014
• 年：2014
• 卷：48
• 期：12
• 页码：7076-7084
• 全文大小：554K
• 年卷期：v.48,no.12(June 17, 2014)
• ISSN：1520-5851

文摘

The photoelectrocatalytic (PEC) reduction of CO₂ into high-value chemicals is beneficial in alleviating global warming and advancing a low-carbon economy. In this work, Pt-modified reduced graphene oxide (Pt-RGO) and Pt-modified TiO₂ nanotubes (Pt-TNT) were combined as cathode and photoanode catalysts, respectively, to form a PEC reactor for converting CO₂ into valuable chemicals. XRD, XPS, TEM, AFM, and SEM were employed to characterize the microstructures of the Pt-RGO and Pt-TNT catalysts. Reduction products, such as C₂H₅OH and CH₃COOH, were obtained from CO₂ under band gap illumination and biased voltage. A combined liquid product generation rate (CH₃OH, C₂H₅OH, HCOOH, and CH₃COOH) of approximately 600 nmol/(h路cm²) was observed. Carbon atom conversion rate reached 1,130 nmol/(h路cm²), which were much higher than those achieved using Pt-modified carbon nanotubes and platinum carbon as cathode catalysts.