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Volume 14
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10.3390/catal14010024
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Article

Uniformly Dispersed Nano Pd-Ni Oxide Supported on Polyporous CeO2 and Its Application in Methane Conversion of Tail Gas from Dual-Fuel Engine

by
Chunlian Luo
1,2,3,
Luwei Chen
4,
Abdullah N. Alodhayb
5,
Jianhua Wu
1,2,
Mingwu Tan
4,* and
Yanling Yang
1,2,*
1
College of Marine Engineering, Jimei University, Xiamen 361000, China
2
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen, Jimei University, Xiamen 361000, China
3
Navigation College, Xiamen Ocean Vocational College, Xiamen 361012, China
4
Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
5
Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
*
Authors to whom correspondence should be addressed.
Catalysts 2024, 14(1), 24; https://doi.org/10.3390/catal14010024
Submission received: 11 November 2023 / Revised: 7 December 2023 / Accepted: 12 December 2023 / Published: 28 December 2023
(This article belongs to the Special Issue Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts)
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Abstract

The development of catalysts for low-temperature methane combustion is crucial in addressing the greenhouse effect. An effective industrial catalyst strategy involves optimizing noble metal utilization and boosting metal–metal interaction. Here, the PdNi-H catalyst was synthesized using the self-assembly method, achieving the high dispersion and close proximity of Pd and Ni atoms compared to the counterparts prepared by the impregnation method, as confirmed by EDS mapping. The XRD and TEM results revealed Pd2+ and Ni2+ doping within the CeO2 lattice, causing distortions and forming Pd-O-Ce or Ni-O-Ce structures. These structures promoted oxygen vacancy formation in CeO2, and this was further confirmed by the Raman and XPS results. Consequently, the PdNi-H catalyst demonstrated an excellent redox ability and catalytic activity, achieving lower ignition and complete methane burning temperatures at 282 and 387 °C, respectively. The highly dispersed PdNi species played a pivotal role in activating methane for enhanced redox ability. Additionally, the narrow size distribution range contributed to more vacancies on the surface of CeO2, as confirmed by the XPS results, thereby facilitating the activation of gas phase oxygen to form oxygen species (O2−). This collaborative catalytic approach presents a promising strategy for developing efficient and stable methane combustion catalysts at low temperatures.
Keywords: Pd-Ni alloy oxide; ceria; co-doping; oxygen vacancy; methane combustion Pd-Ni alloy oxide; ceria; co-doping; oxygen vacancy; methane combustion
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MDPI and ACS Style

Luo, C.; Chen, L.; Alodhayb, A.N.; Wu, J.; Tan, M.; Yang, Y. Uniformly Dispersed Nano Pd-Ni Oxide Supported on Polyporous CeO2 and Its Application in Methane Conversion of Tail Gas from Dual-Fuel Engine. Catalysts 2024, 14, 24. https://doi.org/10.3390/catal14010024

AMA Style

Luo C, Chen L, Alodhayb AN, Wu J, Tan M, Yang Y. Uniformly Dispersed Nano Pd-Ni Oxide Supported on Polyporous CeO2 and Its Application in Methane Conversion of Tail Gas from Dual-Fuel Engine. Catalysts. 2024; 14(1):24. https://doi.org/10.3390/catal14010024

Chicago/Turabian Style

Luo, Chunlian, Luwei Chen, Abdullah N. Alodhayb, Jianhua Wu, Mingwu Tan, and Yanling Yang. 2024. "Uniformly Dispersed Nano Pd-Ni Oxide Supported on Polyporous CeO2 and Its Application in Methane Conversion of Tail Gas from Dual-Fuel Engine" Catalysts 14, no. 1: 24. https://doi.org/10.3390/catal14010024

APA Style

Luo, C., Chen, L., Alodhayb, A. N., Wu, J., Tan, M., & Yang, Y. (2024). Uniformly Dispersed Nano Pd-Ni Oxide Supported on Polyporous CeO2 and Its Application in Methane Conversion of Tail Gas from Dual-Fuel Engine. Catalysts, 14(1), 24. https://doi.org/10.3390/catal14010024

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