Structure–Activity Relationships in Ni-Al Mixed Oxides: The Critical Role of a Precursor Anion in the Oxidative Dehydrogenation of Ethane
Meng Q. Han D. Li D. Dong Y. Wang Y. Kong L. Kang W. Aidarova S.B. Zhao Z.
September 2025Multidisciplinary Digital Publishing Institute (MDPI)
Molecules
2025#30Issue 17
The study employed a green, template-free ball milling method to construct a series of Ni-Al mixed oxide catalysts modulated by different nickel precursors (nitrate, acetate, carbonate, sulfate, and chlorate). Through multiscale characterization techniques (XRD, TEM, XPS, H2-TPR, etc.) and catalytic performance evaluations, we systematically elucidated the regulatory mechanism of precursor types on the structure-performance relationship. The NiAlOx-CO32− catalyst derived from nickel carbonate exhibited a unique structure, an optimal Ni/Al ratio, and well-tuned active oxygen species, thereby demonstrating exceptional catalytic performance in the oxidative dehydrogenation of ethane (ODHE) at 475 °C with 53.2% ethane conversion, 72.6% ethylene selectivity, and maintained stability over 40 h of continuous operation. Beyond developing high-performance ODHE catalysts, this work establishes a “precursor chemistry–material structure–catalytic performance” relationship model, offering new insights for the rational design of efficient catalysts for light alkane conversion.
ball milling , Ni-Al mixed oxide , nickel precursor , oxidative hydrogenation of ethane , structure-performance relationship
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School of Materials Science and Green Technologies, Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, 110034, China
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
School of Materials Science and Green Technologies
Institute of Catalysis for Energy and Environment
State Key Laboratory of Heavy Oil Processing
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