Mechanochemically induced interfacial electronic modulation in MnCe/BaTiO3 for synergistic catalysis for NOx and o-dichlorobenzene
(2026) Journal of Colloid and Interface Science — Vol. 722, p. 140894 (2026)
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- Abstract
- The synergistic removal of NO and chlorinated volatile organic compounds (CVOCs) using bifunctional catalysts has emerged as a cutting-edge strategy in environmental catalysis. However, achieving both efficient NOx selective catalytic reduction and CVOCs catalytic oxidation remains fundamentally challenging due to the inherent trade-off between activity and selectivity. Herein, we demonstrate that this trade-off can be overcome by applying a mechanochemical strategy coupled with electronic band modulation to construct a novel heterojunction catalyst, in which MnCe oxides are integrated with piezoelectric BaTiO3 to form a heterojunction interface. The optimized TB-MnCe catalyst exhibits remarkable synergistic performance, achieving the synergistic removal of o-dichlorobenzene (>80%) and NOx (100%) within a broad temperature range of 250–350 °C. Combined experimental and theoretical investigations reveal an interfacial charge transfer of approximately 4.6 electrons from BaTiO3 to MnCe during mechanochemical treatment. This charge redistribution, mediated by the engineered interface, significantly enhances the redox capability of the active sites and promotes cooperative reactions. This work highlights that atomic-level interfacial electronic modulation induced by mechanochemical processing provides a powerful route to resolve the activity-selectivity dilemma in bifunctional catalysis.
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Citations
Yao, F., Cao, A., Zhou, B., Lu, S., Yan, J., Debecker, D., & Peng, Y. (2026). Mechanochemically induced interfacial electronic modulation in MnCe/BaTiO3 for synergistic catalysis for NOx and o-dichlorobenzene. Journal of Colloid and Interface Science, 722, 140894. https://doi.org/10.1016/j.jcis.2026.140894 (Original work published 2026)