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Liu XH, Lu T, Jiao X, Jiang Z, Chen C, Wang Y, Jian Y, He C. Formaldehyde Ambient-Temperature Decomposition over Pd/Mn 3O 4-MnO Driven by Active Sites' Self-Tandem Catalysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:1752-1762. [PMID: 38190653 DOI: 10.1021/acs.est.3c06876] [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: 01/10/2024]
Abstract
The widespread presence of formaldehyde (HCHO) pollutant has aroused significant environmental and health concerns. The catalytic oxidation of HCHO into CO2 and H2O at ambient temperature is regarded as one of the most efficacious and environmentally friendly approaches; to achieve this, however, accelerating the intermediate formate species formation and decomposition remains an ongoing obstacle. Herein, a unique tandem catalytic system with outstanding performance in low-temperature HCHO oxidation is proposed on well-structured Pd/Mn3O4-MnO catalysts possessing bifunctional catalytic centers. Notably, the optimized tandem catalyst achieves complete oxidation of 100 ppm of HCHO at just 18 °C, much better than the Pd/Mn3O4 (30%) and Pd/MnO (27%) counterparts as well as other physical tandem catalysts. The operando analyses and physical tandem investigations reveal that HCHO is primarily activated to gaseous HCOOH on the surface of Pd/Mn3O4 and subsequently converted to H2CO3 on the Pd/MnO component for deep decomposition. Theoretical studies disclose that Pd/Mn3O4 exhibits a favorable reaction energy barrier for the HCHO → HCOOH step compared to Pd/MnO; while conversely, the HCOOH → H2CO3 step is more facilely accomplished over Pd/MnO. Furthermore, the nanoscale intimacy between two components enhances the mobility of lattice oxygen, thereby facilitating interfacial reconstruction and promoting interaction between active sites of Pd/Mn3O4 and Pd/MnO in local vicinity, which further benefits sustained HCHO tandem catalytic oxidation. The tandem catalysis demonstrated in this work provides a generalizable platform for the future design of well-defined functional catalysts for oxidation reactions.
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Affiliation(s)
- Xiao-He Liu
- Department of Environmental Engineering, College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, P. R. China
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Tong Lu
- Department of Environmental Engineering, College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, P. R. China
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Xinguo Jiao
- Department of Environmental Engineering, College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, P. R. China
| | - Zeyu Jiang
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Changwei Chen
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Yadi Wang
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Yanfei Jian
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Chi He
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
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Xin S, Zhu S, Zheng J, Nie L. One-step fabrication of electrospun flexible and hierarchically porous Pt/γ-Al 2O 3 nanofiber membranes for HCHO and particulate removal. NEW J CHEM 2022. [DOI: 10.1039/d2nj03080b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A flexible Pt/γ-Al2O3 nanofiber membrane with optimal 2 wt% Pt content can effectively decompose HCHO into CO2 at room temperature.
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Affiliation(s)
- Sitian Xin
- Hubei Provincial Key Laboratory of Green Materials for Light Industry. Hubei University of Technology, Wuhan 430068, China
- Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
| | - Silong Zhu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry. Hubei University of Technology, Wuhan 430068, China
- Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
| | - Jianfei Zheng
- Hubei Provincial Key Laboratory of Green Materials for Light Industry. Hubei University of Technology, Wuhan 430068, China
- Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
| | - Longhui Nie
- Hubei Provincial Key Laboratory of Green Materials for Light Industry. Hubei University of Technology, Wuhan 430068, China
- Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
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Zhang Z, Ma J, He H. A simple method to regulate surface hydroxy groups on Al 2O 3 for improving catalytic oxidation performance for HCHO on Pt/Al 2O 3. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01275h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For supported noble metal catalysts, the properties of the support had great influence on the state of noble metals. Herein, we chose Al2O3 as model to find a simple method...
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Chen Y, Jiang G, Cui X, Zhang Z, Hou X. Fabrication of Pd/CeO 2 nanocubes as highly efficient catalysts for degradation of formaldehyde at room temperature. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00766a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The highly active Pd/CeO2 nanocube interface guarantees a high percentage of metallic Pd and the surface active O species is responsible for the complete decomposition of formaldehyde.
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Affiliation(s)
- Yafeng Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering, Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, P.R. China
| | - Guimin Jiang
- School of Environmental Science and Engineering and Key Laboratory of Municipal Solid Waste Recycling Technology and Management of Shenzhen, Southern University of Science and Technology, Shenzhen 518055, P.R. China
| | - Xiangzhi Cui
- The State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Zuotai Zhang
- School of Environmental Science and Engineering and Key Laboratory of Municipal Solid Waste Recycling Technology and Management of Shenzhen, Southern University of Science and Technology, Shenzhen 518055, P.R. China
| | - Xinmei Hou
- Beijing Advanced Innovation Center for Materials Genome Engineering, Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, P.R. China
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