Yujia Han , Teng Zong , Yuehan Wang , Ming Tian , Chaojie Wang , Nanxin Wang , Xiaodong Wang
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引用次数: 0
Abstract
Chemical looping H2O splitting is considered as a promising approach to produce hydrogen thanks to its lower energy consumption and carbon footprint compared with traditional steam reforming. Fe-based oxides have been paid much attention but suffer from inferior H2 production rate and stability due to insufficient activation for H2O. Herein, it was found that the introduction of Cr into MgFe spinel oxides (MgFexCr2-xO4, MFCO) could greatly increase the performance of H2O splitting driven by CH4 reduction with the highest peak H2 production rate of about 4.65 mmol min−1 g−1, H2 productivity of about 2.88 mmol g−1 and good stability during multiple redox cycles for MFCO-46 (the atomic ratio of Fe and Cr of 2:3), which exceeded most of the state-of-the-art Fe-based oxides. This originated from the Cr doping promoting Fe0 nanoparticles exsolution by activating CH4 and Fe-Ov-Cr species formation which relay catalyzed H2O splitting and was favorable for the fast recovery of lattice oxygen converted.
期刊介绍:
The Journal of Catalysis publishes scholarly articles on both heterogeneous and homogeneous catalysis, covering a wide range of chemical transformations. These include various types of catalysis, such as those mediated by photons, plasmons, and electrons. The focus of the studies is to understand the relationship between catalytic function and the underlying chemical properties of surfaces and metal complexes.
The articles in the journal offer innovative concepts and explore the synthesis and kinetics of inorganic solids and homogeneous complexes. Furthermore, they discuss spectroscopic techniques for characterizing catalysts, investigate the interaction of probes and reacting species with catalysts, and employ theoretical methods.
The research presented in the journal should have direct relevance to the field of catalytic processes, addressing either fundamental aspects or applications of catalysis.