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Effective CO _x Suppression by a Na ₄ Mg(WO ₄ ) ₃ Promoter in Chemical Looping Oxidative Dehydrogenation of Ethane

https://doi.org/10.1021/acscatal.4c07851

Chacko, Dennis; Neal, Luke M; Lis, Bar Mosevitzky; Liu, Junchen; Pedersen, Andrew; Wachs, Israel E; Li, Fanxing (March 2025, ACS Catalysis)

Free, publicly-accessible full text available March 7, 2026
Redox oxide@molten salt as a generalized catalyst design strategy for oxidative dehydrogenation of ethane via selective hydrogen combustion

https://doi.org/10.1016/j.apcata.2022.118869

Liu, Junchen; Yusuf, Seif; Jackson, Daniel; Martin, William; Chacko, Dennis; Vogt-Lowell, Kyle; Neal, Luke; Li, Fanxing (September 2022, Applied Catalysis A: General)

Full Text Available
LaNi _x Fe _1–x O _3−δ as a Robust Redox Catalyst for CO ₂ Splitting and Methane Partial Oxidation

Iftikhar, Sherafghan; Jiang, Qiongqiong; Gao, Yunfei; Liu, Junchen; Gu, Haiming; Neal, Luke; Li, Fanxing (September 2021, Energy & Fuels)

Full Text Available
A tailored multi-functional catalyst for ultra-efficient styrene production under a cyclic redox scheme

https://doi.org/10.1038/s41467-021-21374-2

Zhu, Xing; Gao, Yunfei; Wang, Xijun; Haribal, Vasudev; Liu, Junchen; Neal, Luke M.; Bao, Zhenghong; Wu, Zili; Wang, Hua; Li, Fanxing (February 2021, Nature Communications)

Abstract Styrene is an important commodity chemical that is highly energy and CO₂intensive to produce. We report a redox oxidative dehydrogenation (redox-ODH) strategy to efficiently produce styrene. Facilitated by a multifunctional (Ca/Mn)_1−xO@KFeO₂core-shell redox catalyst which acts as (i) a heterogeneous catalyst, (ii) an oxygen separation agent, and (iii) a selective hydrogen combustion material, redox-ODH auto-thermally converts ethylbenzene to styrene with up to 97% single-pass conversion and >94% selectivity. This represents a 72% yield increase compared to commercial dehydrogenation on a relative basis, leading to 82% energy savings and 79% CO₂emission reduction. The redox catalyst is composed of a catalytically active KFeO₂shell and a (Ca/Mn)_1−xO core for reversible lattice oxygen storage and donation. The lattice oxygen donation from (Ca/Mn)_1−xO sacrificially stabilizes Fe³⁺in the shell to maintain high catalytic activity and coke resistance. From a practical standpoint, the redox catalyst exhibits excellent long-term performance under industrially compatible conditions.
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