State Key Laboratory of Clean Energy Utilization, Zhejiang University , Hangzhou, Zhejiang 310027, China.
Environ Sci Technol. 2014 Jun 17;48(12):7076-84. doi: 10.1021/es500364g. Epub 2014 May 28.
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·cm(2)) was observed. Carbon atom conversion rate reached 1,130 nmol/(h·cm(2)), which were much higher than those achieved using Pt-modified carbon nanotubes and platinum carbon as cathode catalysts.
光电催化（PEC）将二氧化碳还原为高价值化学品，有利于缓解全球变暖，推进低碳经济。在这项工作中，将 Pt 修饰的还原氧化石墨烯（Pt-RGO）和 Pt 修饰的 TiO2 纳米管（Pt-TNT）分别作为阴极和光阳极催化剂组合在一起，形成一个 PEC 反应器，用于将 CO2 转化为有价值的化学品。采用 XRD、XPS、TEM、AFM 和 SEM 对 Pt-RGO 和 Pt-TNT 催化剂的微观结构进行了表征。在带隙光照和偏压下，从 CO2 中获得了还原产物，如 C2H5OH 和 CH3COOH。观察到大约 600 nmol/（h·cm(2)）的组合液体产物生成速率（CH3OH、C2H5OH、HCOOH 和 CH3COOH）。碳原子转化率达到 1,130 nmol/（h·cm(2)），远高于使用 Pt 修饰的碳纳米管和铂碳作为阴极催化剂时的转化率。
