Affiliation:
1. Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction Ministry of Education Key Laboratory of Pesticide and Chemical Biology of Ministry of Education College of Chemistry Central China Normal University Wuhan 430079 P. R. China
2. Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
Abstract
AbstractAlthough there are many promising works in the field of Fischer–Tropsch synthesis (FTS), it is still a huge challenge to achieve the rational design of FTS catalysts for excellent selectivity toward light olefins with a high olefins/paraffins ratio (o/p ratio). Herein, a hydrophobic core–shell Fe‐based FTS catalyst is developed by calcination and hydrophobic modification of polyvinylpyrrolidone (PVP)‐decorated Prussian blue (PB, Fe4[Fe(CN)6]3) precursor. The hydrophobic modification is achieved by using trimethylchlorosilane (TMCS) as the hydrophobic agent. Under light irradiation and near ambient pressure (0.18 MPa), compared with the catalyst without the hydrophobic surface to mainly convert CO to valueless CO2, the optimal catalyst delivers excellent selectivity of 48.0% for value‐added light olefins (C2–4 = ) with a high o/p ratio of 10.1 but low selectivity for CO2 at a CO conversion of 22.6%. The excellent FTS performance can be attributed to that the hydrophobic surface of the catalyst regulates the chemical reaction pathway, which promotes the CO hydrogenation but suppresses the conversion of CO to CO2. The study demonstrates that a rationally designed functional surface of a catalyst can govern the reaction pathway along value‐added solar‐to‐chemicals conversion.
Funder
National Natural Science Foundation of China
Postdoctoral Research Foundation of China
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials