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Park ED. Recent Progress on Low-Temperature Selective Catalytic Reduction of NO x with Ammonia. Molecules 2024; 29:4506. [PMID: 39339501 PMCID: PMC11434452 DOI: 10.3390/molecules29184506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2024] [Revised: 09/21/2024] [Accepted: 09/21/2024] [Indexed: 09/30/2024] Open
Abstract
Selective catalytic reduction of nitrogen oxides (NOx) with ammonia (NH3-SCR) has been implemented in response to the regulation of NOx emissions from stationary and mobile sources above 300 °C. However, the development of NH3-SCR catalysts active at low temperatures below 200 °C is still needed to improve the energy efficiency and to cope with various fuels. In this review article, recent reports on low-temperature NH3-SCR catalysts are systematically summarized. The redox property as well as the surface acidity are two main factors that affect the catalytic activity. The strong redox property is beneficial for the low-temperature NH3-SCR activity but is responsible for N2O formation. The multiple electron transfer system is more plausible for controlling redox properties. H2O and SOx, which are often found with NOx in flue gas, have a detrimental effect on NH3-SCR activity, especially at low temperatures. The competitive adsorption of H2O can be minimized by enhancing the hydrophobic property of the catalyst. Various strategies to improve the resistance to SOx poisoning are also discussed.
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Affiliation(s)
- Eun Duck Park
- Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
- Department of Chemical Engineering, Ajou University, Suwon 16499, Republic of Korea
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2
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Wang C, Wang M, Chen L, Shang N, Gao W, Cheng X, Gao S, Gao Y, Wang C. Construction of dendritic mesoporous SiO 2 supported Cu catalyst for hydrodeoxidation of lignin derivatives. BIORESOURCE TECHNOLOGY 2024; 413:131503. [PMID: 39303946 DOI: 10.1016/j.biortech.2024.131503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2024] [Revised: 07/19/2024] [Accepted: 09/16/2024] [Indexed: 09/22/2024]
Abstract
Chemoselective hydrodeoxygenation (HDO) of lignin derivatives is of great importance in converting biomass into high value-added chemicals. Herein, we report a simple hydrothermal pathway to fabricate a highly active, chemically selective, and reusable catalyst (Cu/DMSN) by loading copper clusters on "dendritic" mesoporous silica nanospheres. Cu/DMSN exhibits exceptional catalytic activity (conversion > 99 %, selectivity > 99 %) in the HDO of vanillin toward 2-methoxy-4-methylphenol under mild conditions (140 °C, 0.5 MPa, 3 h), along with good scalability and a wide range of substrates. The excellent catalytic performance can be owed to the combination of suitable acid site and more exposed metal site. This study provides a new strategy for designing supported metal catalysts for hydrodeoxidation of biomass and its derivatives.
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Affiliation(s)
- Chenhuan Wang
- School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China
| | - Mengying Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Lei Chen
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Ningzhao Shang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Wei Gao
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Xiang Cheng
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Shutao Gao
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Yongjun Gao
- College of Chemical and Environmental Science, Hebei University, Baoding 071001, China.
| | - Chun Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China.
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3
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Nie J, Li Y, Gao D, Fang Y, Lin J, Tang C, Guo Z. Carbon doped hexagonal boron nitride as an efficient metal-free catalyst for NO capture and reduction. Phys Chem Chem Phys 2024; 26:2539-2547. [PMID: 38170810 DOI: 10.1039/d3cp04718k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The electrochemical NO reduction reaction (NORR) towards NH3 is considered a promising strategy to cope with both NO removal and NH3 production. Currently, the research on NORR electrocatalysts mainly focuses on metal-based catalysts, while metal-free catalysts are quite scarce. In this work, we have systematically investigated the properties of pristine and C/O doped h-BN for efficient NO capture and reduction. Our results reveal that the basal plane of pristine h-BN is inert to the adsorption of NO, while doping C or O can significantly enhance the NO capture abilities of h-BN. Then, we highlight that C-doped h-BN exhibits excellent NORR catalytic performance with a relatively low limiting potential of -0.28 V. Further analysis shows that the suitable adsorption strength of NO on the C-doped h-BN surface is the prime reason for its excellent NO reduction activity, which is shown to be due to appropriate electronic interactions between the active site and NO. Last but not least, the catalytic selectivity of h-BN towards the NORR is confirmed by inhibiting the competing hydrogen evolution reaction. Our findings not only provide deeper insight into the essential effect of element doping on the catalytic activities of h-BN, but also propose general design principles for high-performance metal-free NORR electrocatalysts.
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Affiliation(s)
- Jiali Nie
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
| | - Ying Li
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
| | - Dongyue Gao
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
| | - Yi Fang
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
| | - Jing Lin
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
| | - Chengchun Tang
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
| | - Zhonglu Guo
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
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4
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Zhang P, Chen A, Lan T, Qu W, Hu X, Zhang K, Zhang D. Revealing the Dynamic Behavior of Active Sites on Acid-Functionalized CeO 2 Catalysts for NO x Reduction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37314863 DOI: 10.1021/acs.langmuir.3c01033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Unraveling the dynamics of the active sites upon CeO2-based catalysts in selective catalytic reduction of nitrogen oxides by ammonia (NH3-SCR) is challenging. In this work, we prepared tungsten-acidified and sulfated CeO2 catalysts and used operando spectroscopy to reveal the dynamics of acid sites and redox sites on catalysts during NH3-SCR reaction. We found that both Lewis and Brønsted acid sites are needed to participate in the catalytic reaction. Notably, Brønsted acid sites are the main active sites after a tungsten-acidified or sulfated treatment, and the change of Brønsted acid sites significantly affects the NOx removal. Moreover, acid functionalization promotes the cerium species cycle between Ce4+ and Ce3+ for the NOx reduction. This work is critical to deeply understanding the natural properties of active sites, and it also provides new insights into the mechanism for NH3-SCR over CeO2-based catalysts.
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Affiliation(s)
- Pan Zhang
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, P. R. China
| | - Aling Chen
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, P. R. China
| | - Tianwei Lan
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, P. R. China
| | - Wenqiang Qu
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, P. R. China
| | - Xiaonan Hu
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, P. R. China
| | - Kai Zhang
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, P. R. China
| | - Dengsong Zhang
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, P. R. China
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5
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Promotional Effect of Zirconium Doping on the NH
3
‐SCR Activity of CeO
2
and CeO
2
‐TA Modified by Thiourea: A Comparative Study. ChemCatChem 2023. [DOI: 10.1002/cctc.202201578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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6
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Chen S, Xie R, Liu Z, Ma L, Yan N. Efficient NO x Reduction against Alkali Poisoning over a Self-Protection Armor by Fabricating Surface Ce 2(SO 4) 3 Species: Comparison to Commercial Vanadia Catalysts. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2949-2957. [PMID: 36751011 DOI: 10.1021/acs.est.2c08570] [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: 06/18/2023]
Abstract
Resolving severe deactivation by alkali metals for selective catalytic reduction of NOx with NH3 (NH3-SCR) is challenging. Herein, surface Ce2(SO4)3 species as a self-protection armor originally exhibited antipoisoning of potassium over ceria-based catalysts. The self-protection armor was also effective for other alkali (Na), alkali-earth (Ca), and heavy (Pb) metals, considerably resolving the deactivation of ceria-based SCR catalysts in practical applications. The catalytic activity tests indicated that the presence of ∼0.8 wt % potassium did not deactivate sulfated CeO2 catalysts, yet commercial V2O5-WO3/TiO2 catalysts almost lost the NOx conversions. Potassium preferably bonded with surface sulfates to form K2SO4 accompanied with the majority of surface Ce2(SO4)3 over sulfated CeO2 catalysts, but preferably coupled with active vanadia to generate inactive KVO3 species over V2O5-WO3/TiO2 catalysts. Such an active Ce2(SO4)3 species facilitated the adsorption and reactivity of NH3 and NOx, enabling ceria catalysts to maintain high catalytic efficiency in the presence of potassium. Conversely, the introduction of potassium into V2O5-WO3/TiO2 catalysts caused a considerable loss of surface acidity, hindering catalyst reactivity during the SCR reaction. The self-protection armor of Ce2(SO4)3 species may open a promising pathway to develop efficient ceria-based SCR catalysts with strong antipoisoning ability.
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Affiliation(s)
- Sijia Chen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Renyi Xie
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhisong Liu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lei Ma
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Naiqiang Yan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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7
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Effect of CeO2 nanoparticle sizes on catalytic performances of sulfated CeO2/Al2O3 catalyst in NH3-SCR reaction. J RARE EARTH 2023. [DOI: 10.1016/j.jre.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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8
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Choi S, Bok Nam K, Phil Ha H, Wook Kwon D. Enhancement of Catalytic N2O Decomposition by Modulating Oxygen Vacancies over Cu/Ce1-XYX Catalysts. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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9
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Zhang P, Chen A, Lan T, Liu X, Yan T, Ren W, Zhang D. Balancing acid and redox sites of phosphorylated CeO 2 catalysts for NO x reduction: The promoting and inhibiting mechanism of phosphorus. JOURNAL OF HAZARDOUS MATERIALS 2023; 441:129867. [PMID: 36115091 DOI: 10.1016/j.jhazmat.2022.129867] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/16/2022] [Accepted: 08/26/2022] [Indexed: 06/15/2023]
Abstract
The role of phosphorus in metal oxide catalysts is still controversial. The precise tuning of the acidic and redox properties of metal oxide catalysts for the selective catalytic reduction in NOx using NH3 is also a great challenge. Herein, CeO2 catalysts with different degrees of phosphorylation were used to study the balance between the acidity and redox property by promoting and inhibiting effects of phosphorus. CeO2 catalysts phosphorylated with lower phosphorus content (5 wt%) exhibited superior NOx reduction performance with above 90% NOx conversion during 240-420 °C due to the balanced acidity and reducibility derived from the highest content of Brønsted acid sites on PO43- to adsorb NH3 and surface adsorbed oxygen species. Plenty of PO3- over CeO2 catalysts phosphorylated with the higher phosphorus content (≥ 10 wt%) significantly disrupted the balance between the acidity and the redox property due to the reduced acid/redox sites, which resulted in the less active NOx species. The mechanism of different structural phosphorus species (PO43- and PO3-) in promoting or inhibiting the NOx reduction over CeO2 catalysts was revealed. This work provides a novel method for qualitative and quantitative study of the relationship between acidity/redox property and activity of catalysts for NOx reduction.
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Affiliation(s)
- Pan Zhang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, PR China
| | - Aling Chen
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, PR China
| | - Tianwei Lan
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, PR China
| | - Xiangyu Liu
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, PR China
| | - Tingting Yan
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, PR China
| | - Wei Ren
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, PR China
| | - Dengsong Zhang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, No.99 Shangda Road, Shanghai 200444, PR China.
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10
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Effects of Ti modified CeCu mixed oxides on the catalytic performance and SO2 resistance towards benzene combustion. CATAL COMMUN 2023. [DOI: 10.1016/j.catcom.2022.106596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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11
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Promotion effect of bulk sulfates over CeO2 for selective catalytic reduction of NO by NH3 at high temperatures. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Xie R, Ma L, Li Z, Qu Z, Yan N, Li J. Review of Sulfur Promotion Effects on Metal Oxide Catalysts for NOx Emission Control. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02197] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Renyi Xie
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lei Ma
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zihao Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zan Qu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Naiqiang Yan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Junhua Li
- School of Environment, Tsinghua University, Beijing 100084, China
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