Feysal M. Ali, Abdelaziz Gouda, Paul N. Duchesne, Mohamad Hmadeh, Paul G. O’Brien, Abhinav Mohan, Mireille Ghoussoub, Athanasios A. Tountas, Hussameldin Ibrahim, Doug D. Perovic, Geoffrey A. Ozin
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引用次数: 0
Abstract
Harnessing solar energy for CO2 conversion to fuels presents a sustainable alternative to fossil fuels. However, finding an economical, stable, non-toxic nanomaterial catalyst poses a significant challenge. Understanding the catalyst’s active state is vital for optimal performance due to potential structural changes during reactions. Herein, we employ various in situ characterizations to detail δ-FeOOH’s structural evolution during hydrogen activation, identifying its active phase while catalyzing the heterogeneous reduction of CO2 by H2. Using in situ environmental transmission electron microscopy, δ-FeOOH is first dehydrated to α-Fe2O3, then reduced to Fe3O4, and finally to α-Fe. Other in situ characterizations revealed that the active state of the catalyst (Fe-350-H2) is a mixture of Fe3O4 and α-Fe. A detailed investigation into the photocatalytic CO2 reduction using batch, flow, and LED reactors unveiled that the Fe-350-H2 catalyst exhibits superior activity and selectivity in activating the reverse water gas shift reaction compared with similar iron-based catalysts.
期刊介绍:
Chem Catalysis is a monthly journal that publishes innovative research on fundamental and applied catalysis, providing a platform for researchers across chemistry, chemical engineering, and related fields. It serves as a premier resource for scientists and engineers in academia and industry, covering heterogeneous, homogeneous, and biocatalysis. Emphasizing transformative methods and technologies, the journal aims to advance understanding, introduce novel catalysts, and connect fundamental insights to real-world applications for societal benefit.