Journal article
Volcano-Shaped Correlation Dictated Superior Activity for Ultralow Al-Doped Iron Oxide toward High-Temperature Water-Gas Shift Reaction
B Qian, X Yan, S Yang, J Zhang, C Liu, Z Liu, Z Fei, B Dai, JZ Liu, Y Wang, L Zhang
ACS Catalysis | AMER CHEMICAL SOC | Published : 2024
Abstract
Earth-abundant iron oxide is an important catalyst for the production of hydrogen via a broad range of catalytic reactions, including the high-temperature water-gas shift reaction (HT-WGSR). For iron oxide catalysts, the aluminum (Al) dopant, with a relatively large concentration of ∼5 wt %, is commonly considered as a textural promoter to stabilize the active phase magnetite. However, the role of Al and its underlying mechanisms are yet to be fully understood. Here, we report the discovery of a volcano-shaped correlation between the Al doping amount and catalyst activity and, potentially, an extremely low yet optimum content of ∼0.85 wt % for Al. Such a low-content Al is initially highly di..
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Grants
Awarded by Australian Government
Funding Acknowledgements
The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (52300175), the Natural Science Foundation of Jiangsu Province of China (BK20220701), the Australian Research Council Linkage Project (LP220100365), the Opening Project of Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices (PMND202210), the Yancheng Key Research and Development Program (Social Development, YCBE202244), and the start-up grant (204060037) from Yancheng Teachers University. Australian synchrotron is acknowledged for the XAS characterization under the projects PA20278, M19329, and M16167. All the DFT calculations were undertaken with the assistance of resources and services from the National Computational Infrastructure (NCI), which is supported by the Australian Government. The authors also acknowledge the use of facilities within the analysis testing center in Yancheng Teachers University.