普鲁士蓝
催化作用
选择性
材料科学
聚乙烯吡咯烷酮
化学工程
煅烧
表面改性
合成气
有机化学
化学
高分子化学
电极
物理化学
工程类
电化学
作者
Yiqiu Shi,Zhenhua Li,Quanguo Hao,Ruizhe Li,Yuan Li,Guo Lina,Shuxin Ouyang,Hong Yuan,Tierui Zhang
标识
DOI:10.1002/adfm.202308670
摘要
Abstract Although 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, Fe 4 [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 CO 2 , the optimal catalyst delivers excellent selectivity of 48.0% for value‐added light olefins (C 2–4 = ) with a high o/p ratio of 10.1 but low selectivity for CO 2 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 CO 2 . The study demonstrates that a rationally designed functional surface of a catalyst can govern the reaction pathway along value‐added solar‐to‐chemicals conversion.
科研通智能强力驱动
Strongly Powered by AbleSci AI