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Wang Y, Xu G, Sun Y, Shi W, Shi X, Yu Y, He H. Creating Atomically Iridium-Doped PdO x Nanoparticles for Efficient and Durable Methane Abatement. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10357-10367. [PMID: 38728016 DOI: 10.1021/acs.est.4c00868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
The urgent environmental concern of methane abatement, attributed to its high global warming potential, necessitates the development of methane oxidation catalysts (MOC) with enhanced low-temperature activity and durability. Herein, an iridium-doped PdOx nanoparticle supported on silicalite-1 zeolite (PdIr/S-1) catalyst was synthesized and applied for methane catalytic combustion. Comprehensive characterizations confirmed the atomically dispersed nature of iridium on the surface of PdOx nanoparticles, creating an Ir4f-O-Pdcus microstructure. The atomically doped Ir transferred more electrons to adjacent oxygen atoms, modifying the electronic structure of PdOx and thus enhancing the redox ability of the PdIr/S-1 catalysts. This electronic modulation facilitated methane adsorption on the Pd site of Ir4f-O-Pdcus, reducing the energy barrier for C-H bond cleavage and thereby increasing the reaction rate for methane oxidation. Consequently, the optimized PdIr0.1/S-1 showed outstanding low-temperature activity for methane combustion (T50 = 276 °C) after aging and maintained long-term stability over 100 h under simulated exhaust conditions. Remarkably, the novel PdIr0.1/S-1 catalyst demonstrated significantly enhanced activity even after undergoing harsh hydrothermal aging at 750 °C for 16 h, significantly outperforming the conventional Pd/Al2O3 catalyst. This work provides valuable insights for designing efficient and durable MOC catalysts, addressing the critical issue of methane abatement.
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Affiliation(s)
- Yingjie Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Guangyan Xu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanwei Sun
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Shi
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyan Shi
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yunbo Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
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Wang M, He Z, Chen M, Wang Y. Aryl sulfonate anion stabilized aromatic triangular cation [Pd 3] +: syntheses, structures and properties. RSC Adv 2023; 13:29689-29694. [PMID: 37822652 PMCID: PMC10563175 DOI: 10.1039/d3ra04460b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 09/19/2023] [Indexed: 10/13/2023] Open
Abstract
A series of sulfonate anions paired aromatic triangular palladium clusters 3-7, abbreviated as [Pd3]+[ArSO3]-, were synthesized using a simple "one pot" method, and gave excellent isolated yields (90-95%). Their structures and properties have been fully characterized and further investigated by fluorescence, single crystal X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS). In varying organic solvents, they presented apparently stronger absorption and emission in MeOH, driven by the combined interactions of hydrogen bonds and polarity. The crystallographic data demonstrated that the methyl orange ion stabilized complex 7 possessed a D3h symmetric metallic core which was still coplanar and almost equilateral, jointly influenced by the giant hindrance and milder donating effect from the sulfonate. The binding energies for Pdn+ 3d5/2 and Pdn+ 3d3/2 measured by XPS presented at 336.55 and 342.00 eV, respectively. These data were much lower than that of a usual Pd2+ 3d and significantly higher than that of a Pd0 species, further proving the unified palladium valence state (+4/3) in the tri-palladium core and its aromaticity featured by the cyclic electron delocalization.
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Affiliation(s)
- Miaomiao Wang
- Department of Chemistry and Chemical Engineering, Liaocheng University 252059 Liaocheng China
| | - Zhixin He
- Department of Chemistry and Chemical Engineering, Liaocheng University 252059 Liaocheng China
| | - Meng Chen
- Department of Chemistry and Chemical Engineering, Liaocheng University 252059 Liaocheng China
| | - Yanlan Wang
- Department of Chemistry and Chemical Engineering, Liaocheng University 252059 Liaocheng China
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Han J, Guan J. Heteronuclear dual-metal atom catalysts for nanocatalytic tumor therapy. CHINESE JOURNAL OF CATALYSIS 2023. [DOI: 10.1016/s1872-2067(22)64207-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Chen Y, Chen Z, Yang D, Zhu L, Liang Z, Pang Y, Zhou L. Novel Microbial Palladium Nanoparticles with a High Photothermal Effect for Antibacterial Applications. ACS OMEGA 2023; 8:1534-1541. [PMID: 36643470 PMCID: PMC9835163 DOI: 10.1021/acsomega.2c07037] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 12/12/2022] [Indexed: 06/12/2023]
Abstract
Novel biocompatible palladium nanoparticles (Pd-NPs) have been prepared by microorganisms via Bacillus megaterium Y-4. It was demonstrated that ultrasonication treatment of biologically reduced Pd-NPs impart a much higher absorption in NIR regions and a better photothermal conversion efficiency to the material. The as-prepared material showed excellent biocompatibility and antibacterial activity under NIR irradiation. In less than 10 min, the disinfection efficiency for a low dosage of Pd-NPs (20 mg/L) was 99.99% toward both Staphylococcus aureus and Escherichia coli. The exclusive and even dispersed microbial Pd-NPs display a high efficiency of photothermal conversion under the irradiation of NIR, which endows them with excellent antibacterial activity in a low dosage.
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Affiliation(s)
- Yuan Chen
- Key
Laboratory for Water Quality and Conservation of the Pearl River Delta,
Ministry of Education, Institute of Environmental Research at Great
Bay Area, Guangzhou University, Guangzhou, Guangdong 510006, PR China
- Institute
of Biological and Medical Engineering, Guangdong Academy of Science, Guangzhou, Guangdong 510006, PR China
| | - Zhiquan Chen
- Key
Laboratory for Water Quality and Conservation of the Pearl River Delta,
Ministry of Education, Institute of Environmental Research at Great
Bay Area, Guangzhou University, Guangzhou, Guangdong 510006, PR China
| | - Didi Yang
- School
of Pharmacy, Hubei University of Science
and Technology, Xianning, Hubei 437100, PR China
| | - Lishan Zhu
- Key
Laboratory for Water Quality and Conservation of the Pearl River Delta,
Ministry of Education, Institute of Environmental Research at Great
Bay Area, Guangzhou University, Guangzhou, Guangdong 510006, PR China
| | - Zhenda Liang
- Key
Laboratory for Water Quality and Conservation of the Pearl River Delta,
Ministry of Education, Institute of Environmental Research at Great
Bay Area, Guangzhou University, Guangzhou, Guangdong 510006, PR China
| | - Yijun Pang
- Key
Laboratory for Water Quality and Conservation of the Pearl River Delta,
Ministry of Education, Institute of Environmental Research at Great
Bay Area, Guangzhou University, Guangzhou, Guangdong 510006, PR China
- School
of Pharmacy, Hubei University of Science
and Technology, Xianning, Hubei 437100, PR China
| | - Li Zhou
- Key
Laboratory for Water Quality and Conservation of the Pearl River Delta,
Ministry of Education, Institute of Environmental Research at Great
Bay Area, Guangzhou University, Guangzhou, Guangdong 510006, PR China
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Peng S, Ma Z, Ma J, Wang H, Chen J, Wei H, Li Y, Ao Z, Wang B. Influence of carrier effect on Pd/Al 2O 3 for methane complete catalytic oxidation. Front Chem 2022; 10:978698. [PMID: 36082198 PMCID: PMC9445149 DOI: 10.3389/fchem.2022.978698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
Pd/Al2O3 catalysts modified by different chemical elements (Mg, Si, Ce, and Zr) were tested for methane (CH4) catalytic combustion, and PdO nanoparticles loaded on modified Al2O3 were systematically studied. These conditions assess the carrier effects of Pd/Al2O3 and acid strength influences on CH4 combustion. We observed carrier effects on activation energy through tuning Pd 3d binding energies (BEs) and on pre-exponential factors (A) through Pd dispersion and acidity on supports. When the BE of Pd 3d5/2 is 337.3 eV, PdO nanoparticles loaded on modified Al2O3 have excellent activity in cracking the C-H bond of CH4, which leads to the lowest activation energy (E a ), regardless of the size effect of the PdO nanoparticle. Furthermore, a theoretical construction that acid sites on catalysts promote the reversible elementary step (2Pd-OH ↔ Pd-O* + Pd* + H2O) right shifts improving the A dependency on the quantity of exposed Pd* and Pd-O*. As a result, Al2O3, as the carrier, not only modifies the electronic characteristics and size of supported PdO nanoparticles but also participates in the reaction process via acid sites on the surface of Al2O3.
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Affiliation(s)
- Shengpan Peng
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Ziran Ma
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Jing Ma
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Hongyan Wang
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Jingyun Chen
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Hui Wei
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Yonglong Li
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Zhimin Ao
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, China
| | - Baodong Wang
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
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