1
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Rabee AIM, Abed H, Vuong TH, Bartling S, Kraußer L, Atia H, Rockstroh N, Kondratenko EV, Brückner A, Rabeah J. CeO 2-Supported Single-Atom Cu Catalysts Modified with Fe for RWGS Reaction: Deciphering the Role of Fe in the Reaction Mechanism by In Situ/Operando Spectroscopic Techniques. ACS Catal 2024; 14:10913-10927. [PMID: 39050904 PMCID: PMC11265290 DOI: 10.1021/acscatal.4c01493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 06/18/2024] [Accepted: 06/28/2024] [Indexed: 07/27/2024]
Abstract
Reverse water-gas shift (RWGS) reaction has attracted much attention as a potential approach for CO2 valorization via the production of synthesis gas, especially over Fe-modified supported Cu catalysts on CeO2. However, most studies have focused solely on investigating the RWGS reaction over catalysts with high Cu and Fe loadings, thus leading to an increase in the complexity of the catalytic system and, hence, preventing the gain of any reliable information about the nature of the active sites and reaction mechanism. In this work, a CeO2-supported single-atom Cu catalyst modified with iron was synthesized and evaluated for the RWGS reaction. The catalytic results reveal a significant synergistic effect between CuCeO2 and Fe, demonstrating an activity up to three times higher than the combined catalytic activities of monometallic catalysts (Fe/CeO2 + CuCeO2) under identical conditions. Various ex situ and in situ/operando techniques are employed to unveil the concealed role of Fe in catalyst activity enhancement. The combined findings from hydrogen temperature-programmed reduction (H2-TPR) and operando electron paramagnetic resonance spectroscopy (EPR) reveal that the added Fe predominantly interacts with Cu-containing surface sites, resulting in the stabilization of higher proportions of Cu single sites. Near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and operando EPR results unveil a synergistic interplay of Fe with Cu-containing sites and CeO x domains, efficiently enhancing both the reoxidation of Cu+ in Cu+-Ov-Ce3+ moieties and the reducibility of Ce4+ in CeO x domains under RWGS conditions. Detailed mechanistic studies reveal that the RWGS reaction predominantly proceeds via the redox mechanism.
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Affiliation(s)
- Abdallah I. M. Rabee
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
- Chemistry
Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt
| | - Hayder Abed
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Thanh Huyen Vuong
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Stephan Bartling
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Laura Kraußer
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Hanan Atia
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Nils Rockstroh
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | | | - Angelika Brückner
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
- Department
Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
| | - Jabor Rabeah
- Leibniz-Institut
für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
- State
Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization,
Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, 730000 Lanzhou, P. R. China
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2
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Zhang J, Xu L, Yang X, Guo S, Zhang Y, Zhao Y, Wu G, Li G. Amorphous MnRuO x Containing Microcrystalline for Enhanced Acidic Oxygen-Evolution Activity and Stability. Angew Chem Int Ed Engl 2024:e202405641. [PMID: 38818616 DOI: 10.1002/anie.202405641] [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: 03/23/2024] [Revised: 05/10/2024] [Accepted: 05/30/2024] [Indexed: 06/01/2024]
Abstract
Compared to Ir, Ru-based catalysts often exhibited higher activity but suffered significant and rapid activity loss during the challenging oxygen evolution reaction (OER) in a corrosive acidic environment. Herein, we developed a hybrid MnRuOx catalyst in which the RuO2 microcrystalline regions serve as a supporting framework, and the amorphous MnRuOx phase fills the microcrystalline interstices. In particular, the MnRuOx-300 catalyst from an annealing temperature of 300 °C contains an optimal amorphous/crystalline heterostructure, providing substantial defects and active sites, facilitating efficient adsorption and conversion of OH-. In addition, the heterostructure leads to a relative increase of the d-band center close to the Fermin level, thus accelerating electron transfer with reduced charge transfer resistance at the active interface between crystalline and amorphous phases during the OER. The catalyst was further thoroughly evaluated under various operating conditions and demonstrated exceptional activity and stability for the OER, representing a promising solution to replace Ir in water electrolyzers.
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Affiliation(s)
- Jingjing Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian, 116023, Liaoning, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Liangliang Xu
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Xiaoxuan Yang
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Song Guo
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian, 116023, Liaoning, China
| | - Yifei Zhang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering Shenyang Normal University, Shenyang, 110034, China
| | - Yang Zhao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian, 116023, Liaoning, China
| | - Gang Wu
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Gao Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian, 116023, Liaoning, China
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering Shenyang Normal University, Shenyang, 110034, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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3
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Xiong Q, Shi Q, Gu X, Sheng X, Sun Y, Shi H, Xu L, Li G. Visible-light S-scheme heterojunction of copper bismuthate quantum dots decorated Titania-spindles for exceptional tetracycline degradation. J Colloid Interface Sci 2024; 654:1365-1377. [PMID: 37918096 DOI: 10.1016/j.jcis.2023.10.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/11/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
The rational heterojunctions for antibiotics degradation have sparked significant attention in wastewater purification. In this study, we report a unique S-scheme photocatalytic system by in-situ growth of CuBi2O4 quantum dots (QDs) onto {101} facet of TiO2 spindles (TiO2-P) via hydrothermal transformation of Na-titanate nanotubes, which is observed by transmission electron microscopy technology. The CuBi2O4/TiO2-P effectively achieves photo-degradation of tetracycline (TC) using visible light (e.g. an 82% TC degradation efficiency at 60 min), which is attributed to the promotion of the charge separation and retaining strong redox capacity at the heterojunction interfaces via the active species of O2-, OH, and h+. Moreover, density functional theory (DFT) calculations show that a built-in electric field forms at the interface of the S-scheme heterojunction. In all, this work introduces a straightforward in-situ hydrothermal growth method to construct S-scheme photocatalysts for effective water treatment.
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Affiliation(s)
- Qi Xiong
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Quanquan Shi
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China; Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resource & Key Laboratory of Agricultural Ecological Security and Green Development at Universities of Inner Mongolia Autonomous, Hohhot 010018, China.
| | - Xinrui Gu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xianliang Sheng
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Yanxin Sun
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Huiming Shi
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Liangliang Xu
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
| | - Gao Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing, China.
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4
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Wang X, Li R, Luo X, Mu J, Peng J, Yan G, Wei P, Tian Z, Huang Z, Cao Z. Enhanced CO oxidation performance over hierarchical flower-like Co 3O 4 based nanosheets via optimizing oxygen activation and CO chemisorption. J Colloid Interface Sci 2024; 654:454-465. [PMID: 37857098 DOI: 10.1016/j.jcis.2023.10.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 10/08/2023] [Accepted: 10/15/2023] [Indexed: 10/21/2023]
Abstract
Enhancing low-temperature activity is a focus for carbon monoxide (CO) elimination by catalytic oxidation. In this work, the hierarchical flower-like silver (Ag) modified cobalt oxides (Co3O4) nanosheets were prepared by solvothermal method and applied into catalytic CO oxidation. The doped Ag species in the form of AgCoO2 induced the prolongated surface Co-O bond and weaker bond intensity. Consequently, the oxygen activation/migration ability and redox capacity of Ag0.02Co were enhanced with more oxygen vacancies. The chemisorbed CO was preferentially converted to CO2 but not carbonates. The inhibited carbonates accumulation could avoid the coverage of active sites. According to Density functional theory (DFT) calculations, the electron transfer from AgCoO2 to Co3O4 promote electron donation ability of Co3O4 layer, benefiting for oxygen activation. Moreover, the longer Co-C and C-O bond length suggest the weakened chemisorption strength and higher active of CO molecule. The Ag modified Co3O4 exhibited more satisfactory activity at lower temperature. Typically, it realized 100% CO conversion at 90 °C, and displayed 6.3-fold higher reaction rate than pristine Co3O4 at 40 °C. Moreover, the Ag0.02Co exhibited outstanding long-term stability and water resistance. In summary, the optimized oxygen activation, CO chemisorption and interfacial electron transfer synergistically boosted the CO oxidation activity on Ag modified Co3O4.
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Affiliation(s)
- Xinyang Wang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Rui Li
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xinyu Luo
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Jincheng Mu
- College of Resources and Environmental Engineering, Guizhou University, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang 550025, China
| | - Jianbiao Peng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Guangxuan Yan
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Pengkun Wei
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zhenbang Tian
- Institute of Chemistry Co. Ltd, Henan Academy of Sciences, Zhengzhou, Henan 450002, China
| | - Zuohua Huang
- Institute of Chemistry Co. Ltd, Henan Academy of Sciences, Zhengzhou, Henan 450002, China
| | - Zhiguo Cao
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China.
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5
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Shi Q, Li Z, Cao C, Li G, Barkaoui S. Robust 2 nm-sized gold nanoclusters on Co 3O 4 for CO oxidation. NANOSCALE ADVANCES 2023; 5:5385-5389. [PMID: 37767036 PMCID: PMC10521261 DOI: 10.1039/d3na00561e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023]
Abstract
In this study, gold nanoparticles were dispersed on Co3O4 nanoplates, forming a specific Au-Co3O4 interface. Upon calcination at 300 °C in air, aberration-corrected STEM images evidenced that the gold nanoclusters (NCs) on Co3O4{111} were maintained at ca. 2.2 nm, which is similar to the size of the parent Au colloidal particles, demonstrating the stronger metal-support interaction (SMSI) on Co3O4{111}. Au/Co3O4{111} showed good catalytic activity (a full CO conversion achieved at 80 °C) and durability (over 10 hours) in CO oxidation, which was mainly due to the promotion by the surface oxygen vacancies and intrinsic defects of Co3O4{111} for activating O2 and by Au0, Auδ+, and Au+ species on the surface of gold NCs for CO activation, as evidenced by Raman and Fourier-transform infrared (FT-IR) spectroscopy analysis. Au/Co3O4 catalyzed CO oxidation obeyed the Langmuir-Hinshelwood mechanism at low temperatures.
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Affiliation(s)
- Quanquan Shi
- College of Science, Inner Mongolia Agricultural University Hohhot 010018 China
- Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resource & Key Laboratory of Agricultural Ecological Securi-ty and Green Development at Universities of Inner Mongolia Autonomous Hohhot 010018 China
| | - Zhiwen Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Changhai Cao
- Key Laboratory of Biofuels and Biochemical Engineering, SINOPEC Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd Dalian 116045 China
| | - Gao Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Sami Barkaoui
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
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6
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Liu X, Peng F, Li G, Diao K. Dynamic Metal Nanoclusters: A Review on Accurate Crystal Structures. Molecules 2023; 28:5306. [PMID: 37513180 PMCID: PMC10383162 DOI: 10.3390/molecules28145306] [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: 06/13/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
Dynamic metal nanoclusters have garnered widespread attention due to their unique properties and potential applications in various fields. Researchers have been dedicated to developing new synthesis methods and strategies to control the morphologies, compositions, and structures of metal nanoclusters. Through optimized synthesis methods, it is possible to prepare clusters with precise sizes and shapes, providing a solid foundation for subsequent research. Accurate determination of their crystal structures is crucial for understanding their behavior and designing custom functional materials. Dynamic metal nanoclusters also demonstrate potential applications in catalysis and optoelectronics. By manipulating the sizes, compositions, and surface structures of the clusters, efficient catalysts and optoelectronic materials can be designed and synthesized for various chemical reactions and energy conversion processes. This review summarizes the research progress in the synthesis methods, crystal structure characterization, and potential applications of dynamic metal nanoclusters. Various nanoclusters composed of different metal elements are introduced, and their potential applications in catalysis, optics, electronics, and energy storage are discussed. Additionally, the important role of dynamic metal nanoclusters in materials science and nanotechnology is explored, along with an overview of the future directions and challenges in this field.
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Affiliation(s)
- Xiang Liu
- Hunan Drug Inspection Center, Hunan Institute for Drug Control, Changsha 410013, China
| | - Fan Peng
- Public Course Teaching Department, Changsha Health Vocational College, Changsha 410013, China
| | - Gao Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Kai Diao
- College of Mathematics and Physics, Chengdu University of Technology, Chengdu 610059, China
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7
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Li Z, Zhang Y, Jiang Q, Xu L, Han ZK, Baiker A, Li G. CuCeO x/CuO Catalyst Derived from the Layered Double Hydroxide Precursor: Catalytic Performance in NO Reduction with CO in the Presence of Water and Oxygen. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6957-6963. [PMID: 37162390 DOI: 10.1021/acs.langmuir.2c03258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Valencies of metal species and lattice defects, such as oxygen vacancies, play a pivotal role in metal oxide-catalyzed reactions. Herein, we report a promising synthetic strategy for preparing CuO-supported CuCeOx catalysts (CuCeOx/CuO) by calcination of a hydrotalcite precursor [Cu6Ce2(OH)16]CO3·nH2O. The structural and chemical properties of catalysts were characterized by XRD, ICP-AES, TEM, TPR, NH3-TPD, XPS, Raman spectroscopy, and N2 adsorption, which revealed that the thermal pretreatment in an oxidative atmosphere caused segregation and reconstitution processes of the precursor, resulting in a mesoporous catalyst consisting of well-dispersed CuO-supported CuCeOx clusters of 1.8-3.2 nm in size with a high population of oxygen vacancies. The as-prepared catalyst shows excellent catalytic performance in the reduction of NO by CO in the absence as well as in the presence of water and oxygen. This behavior is attributed to its high oxygen defect concentration facilitating the interplay of the redox equilibria between Cu2+ and reduced copper species (Cu+/Cu0) and (Ce4+/Ce3+). The high surface population of oxygen vacancies and in situ-generated metallic copper species have been evidenced by Raman spectroscopy and X-ray photoelectron spectroscopy. The layered double hydroxide-derived CuCeOx/CuO also showed good water tolerance and long-term stability. In situ infrared spectroscopy investigations indicated that adsorbed hyponitrite species are the main reaction intermediates of the NO conversion as also corroborated by theoretical simulations.
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Affiliation(s)
- Zhiwen Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yifei Zhang
- College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China
| | - Qike Jiang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
| | - Liangliang Xu
- Electrical and Biomedical Engineering Multidisciplinary Computational Laboratory, Hanyang University Ringgold Standard Institution, Seoul 04763, Republic of Korea
| | - Zhong-Kang Han
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Alfons Baiker
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Hönggerberg, HCl, CH-8093 Zurich, Switzerland
| | - Gao Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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8
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Choi KI, Yadav D, Jung J, Park E, Lee KM, Kim T, Kim J. Noble Metal Nanoparticles Decorated Boron Nitride Nanotubes for Efficient and Selective Low-Temperature Catalytic Reduction of Nitric Oxide with Carbon Monoxide. ACS APPLIED MATERIALS & INTERFACES 2023; 15:10670-10678. [PMID: 36780665 DOI: 10.1021/acsami.2c20985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Parallel to CO2 emission, NOx emission has become one of the menacing problems that seek a simple, durable, and high-efficiency deNOx catalyst. Herein, we demonstrated simple syntheses of platinum group metal nanoparticle-decorated f-BNNT (PGM = Pd, Pt, and Rh, and f-BNNT stands for -OH-functionalized boron nitride nanotubes) as a catalyst for efficient and selective reduction of NO by CO at low-temperature conditions. PGM/f-BNNT with a low amount of noble metal nanoparticles (0.7-0.8 wt %) presents very efficient catalytic activity for NO reduction as well as CO oxidation during their removal process. The removal efficiencies of NO and CO with Pd/f-BNNT, Pt/f-BNNT, and Rh/f-BNNT catalysts were investigated under various temperatures, flow rates, and reaction times, respectively. For most cases, NO catalytic reduction with CO reaction was >99% at a temperature as low as ∼200 °C. The catalyst robustness and efficiency were also verified by presenting almost 100% conversion of NO using a Rh/f-BNNT catalyst, which was aged under humid air at 600 and 700 °C for 24 h, respectively. The synergic effect of the catalytic efficacy of the well-dispersed noble metal nanoparticles and the excellent surface properties of BNNT are reasons for the high selectivity and catalytic property at a low temperature. On the basis of this investigation, we demonstrated that the noble metal nanoparticle-decorated f-BNNT catalysts are possible to save expensive PGM catalysts, such as Pt, Pd, and Rd, as much as 100 times while presenting similar or better catalytic performance for simultaneous NO and CO removals.
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Affiliation(s)
- Ki-In Choi
- R&D Center, NAiEEL Technology, 6-2 Yuseongdaero 1205, Daejeon 34104, Republic of Korea
| | - Dolly Yadav
- R&D Center, NAiEEL Technology, 6-2 Yuseongdaero 1205, Daejeon 34104, Republic of Korea
| | - Junghwan Jung
- R&D Center, NAiEEL Technology, 6-2 Yuseongdaero 1205, Daejeon 34104, Republic of Korea
| | - Eunkwang Park
- R&D Center, NAiEEL Technology, 6-2 Yuseongdaero 1205, Daejeon 34104, Republic of Korea
| | - Kyung-Min Lee
- Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, New York 11794, United States
| | - Taejin Kim
- Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, New York 11794, United States
| | - Jaewoo Kim
- R&D Center, NAiEEL Technology, 6-2 Yuseongdaero 1205, Daejeon 34104, Republic of Korea
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9
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Wang F, Yu Z, Zhai S, Li Y, Xu Y, Ye Y, Wei X, Xu J, Xue B. CuO decorated vacancy-rich CeO 2 nanopencils for highly efficient catalytic NO reduction by CO at low temperature. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:31895-31904. [PMID: 36459322 DOI: 10.1007/s11356-022-24508-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
With the rapid development of transportation and vehicles, the elimination of NOx and CO has highly attracted public attention. In this work, vacancy-rich CeO2 nanopencil supported CuO catalysts (CuO/CeO2-NPC) were successfully prepared for NO reduction by CO. Importantly, CeO2 with nanopencil-like shape (CeO2-NPC) have been synthesis by solvothermal method for the first time. The physicochemical properties of all samples were studied in detail by combining the means of X-ray diffraction (XRD), Raman spectroscopy, electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), H2-temperature-programmed reduction (H2-TPR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), N2 physisorption (Brunauer-Emmett-Teller), and NO and CO temperature-programmed desorption (NO-TPD and CO-TPD) techniques. Compared with CeO2 nanorods and nanoparticles supported CuO catalysts (CuO/CeO2-NR and CuO/CeO2-NP), the CuO/CeO2-NPC catalysts showed the highest catalytic activity, affording more than 90% NO conversion at 69 °C as well as excellent H2O tolerance at 150 °C, which is superior to catalysts previously reported. Characterization results indicated that the synergistic effect between the well-dispersed CuO and the CeO2 nanopencil support enables a favorable electron transfer between these components and enhances the density of surface oxygen vacancies and Cu+ species, which consequently accelerating the redox cycle. The results indicated that the morphology control of CeO2 support could be an efficient way to evidently enhance the catalytic performance for NO + CO reaction.
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Affiliation(s)
- Fei Wang
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou, 213164, People's Republic of China.
| | - Zairan Yu
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Shuai Zhai
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Yuanyuan Li
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Yang Xu
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Yuyang Ye
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Xuejiao Wei
- School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, 213032, People's Republic of China
| | - Jie Xu
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Bing Xue
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou, 213164, People's Republic of 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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Li K, Li H, Wei S, Liu Y, Li Y, Zhang R, Liu R. High performance BaCO3-CeO2 composite catalyst for solvent-free selective oxidation of cyclohexane with molecular oxygen. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Zhao H, Pang X, Huang Y, Ma C, Bai H, Fan W. CeO 2/Ni-MOF with Synergistic Function of Enrichment and Activation: Efficient Reduction of 4-Nitrophenol Pollutant to 4-Aminophenol. Inorg Chem 2022; 61:19806-19816. [PMID: 36417551 DOI: 10.1021/acs.inorgchem.2c02937] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The conversion of organic pollutants to value-added chemicals has been considered as a sustainable approach to solve environmental problems. However, it is still a challenge to construct a suitable heterogeneous catalyst that can synchronously achieve the enrichment and activation of organic pollutants (such as 4-nitrophenol, 4-NP). Here, an organic-inorganic hybrid catalyst (CeO2/Ni-MOF) was successfully fabricated for efficiently reducing 4-NP to 4-aminophenol (4-AP) with water as the hydrogen source. Based on the synergistic effect of Ni-MOF (adsorption action) and CeO2 (active sites), CeO2/Ni-MOF could achieve a reaction rate of 1.102 μmol min-1 mg-1 with an ultrahigh Faraday efficiency (FE) (99.9%) and conversion (97.6%). In addition, the catalytic mechanism of 4-NP reduction over CeO2/Ni-MOF was elaborated in depth. This work presents a new avenue for the effective reduction of pollutants and provides a new strategy for designing high-performance catalysts for rare-earth metals.
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Affiliation(s)
- Huaiquan Zhao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang212013, People's Republic of China
| | - Xuliang Pang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang212013, People's Republic of China
| | - Yifei Huang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang212013, People's Republic of China
| | - Chuan Ma
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang212013, People's Republic of China
| | - Hongye Bai
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang212013, People's Republic of China
| | - Weiqiang Fan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang212013, People's Republic of China.,Synergistic Innovation Center of Modern Agricultural Equipment, Jiangsu University, Zhenjiang212013, People's Republic of China
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Zhang Y, Khalid MS, Wang M, Li G. New Strategies on Green Synthesis of Dimethyl Carbonate from Carbon Dioxide and Methanol over Oxide Composites. Molecules 2022; 27:molecules27175417. [PMID: 36080185 PMCID: PMC9457872 DOI: 10.3390/molecules27175417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/17/2022] [Accepted: 08/19/2022] [Indexed: 11/16/2022] Open
Abstract
Dimethyl carbonate is a generally used chemical substance which is environmentally sustainable in nature and used in a range of industrial applications as intermediate. Although various methods, including methanol phosgenation, transesterification and oxidative carbonylation of methanol, have been developed for large-scale industrial production of DMC, they are expensive, unsafe and use noxious raw materials. Green production of DMC from CO2 and methanol is the most appropriate and eco-friendly method. Numerous catalysts were studied and tested in this regard. The issues of low yield and difficulty in tests have not been resolved fundamentally, which is caused by the inherent problems of the synthetic pathway and limitations imposed by thermodynamics. Electron-assisted activation of CO2 and membrane reactors which can separate products in real-time giving a maximum yield of DMC are also being used in the quest to find more effective production method. In this review paper, we deeply addressed green production methods of DMC using Zr/Ce/Cu-based nanocomposites as catalysts. Moreover, the relationship between the structure and activity of catalysts, catalytic mechanisms, molecular activation and active sites identification of catalysts are also discussed.
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Affiliation(s)
- Yifei Zhang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China
| | - Muhammad Shoaib Khalid
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Meng Wang
- Key Laboratory of Biofuels and Biochemical Engineering, SINOPEC Dalian Research Institute of Petroleum and Petro-Chemicals, Dalian 116045, China
- Correspondence: (M.W.); (G.L.)
| | - Gao Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Correspondence: (M.W.); (G.L.)
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Wang Y, Zhang Y, Jiang Q, Guo S, Baiker A, Li G. Ternary CuCrCeOx Solid Solution Enhances N2‐Selectivity in the NO Reduction with CO in the Presence of Water and Oxygen. ChemCatChem 2022. [DOI: 10.1002/cctc.202200203] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuhang Wang
- Shenyang Normal University Institute of Catalysis for Energy and Environment CHINA
| | - Yifei Zhang
- Shenyang Normal University Institute of Catalysis for Energy and Environment 110034 Shenyang CHINA
| | - Qike Jiang
- Dalian Institute of Chemical Physics State Key Laboratory of Catalysis State Key Laboratory of Catalysis CHINA
| | - Song Guo
- Dalian Institute of Chemical Physics State Key Laboratory of Catalysis State Key Laboratory of Catalysis CHINA
| | - Alfons Baiker
- ETH Zurich: Eidgenossische Technische Hochschule Zurich Department of Chemistry and Applied Biosciences Wolfgang Pauli Strasse 12 CH-8093 Zürich SWITZERLAND
| | - Gao Li
- Dalian Institute of Chemical Physics State Key Laboratory of Catalysis State Key Laboratory of Catalysis CHINA
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Facile Assembly of InVO 4/TiO 2 Heterojunction for Enhanced Photo-Oxidation of Benzyl Alcohol. NANOMATERIALS 2022; 12:nano12091544. [PMID: 35564253 PMCID: PMC9101042 DOI: 10.3390/nano12091544] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 04/25/2022] [Accepted: 04/28/2022] [Indexed: 02/04/2023]
Abstract
In this work, an InVO4/TiO2 heterojunction composite catalyst was successfully synthesized through a facile hydrothermal method. The structural and optical characteristics of InVO4/TiO2 heterojunction composites are investigated using a variety of techniques, including powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and spectroscopy techniques. The addition of InVO4 to TiO2 considerably enhanced the photocatalytic performance in selective photo-oxidation of benzyl alcohol (BA). The 10 wt% InVO4/TiO2 composite photocatalyst provided a decent 100% BA conversion with over 99% selectivity for benzaldehyde, and exhibited a maximum conversion rate of 3.03 mmol g−1 h−1, which is substantially higher than bare InVO4 and TiO2. The excellent catalytic activity of the InVO4/TiO2 photocatalyst is associated with the successful assembly of heterostructures, which promotes the charge separation and transfer between InVO4 and TiO2.
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Fabrication of Stable Cu-Ce Catalyst with Active Interfacial Sites for NOx Elimination by Flame Spray Pyrolysis. Catalysts 2022. [DOI: 10.3390/catal12040432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The complete conversion of NOx to harmless N2 without N2O formation is crucial for the control of air pollution, especially at low temperatures. Cu-based catalysts are promising materials due to their low cost and high activity in NO dissociation, even comparable to noble metals; however, they suffer from low stability. Here, we established a Cu-Ce catalyst in one step with strong metal–support interaction by the flame spray pyrolysis (FSP) method. Almost 100% NO conversion was achieved at 100 °C, and they completely transferred into N2 at a low temperature (200 °C) for the FSP-CuCe catalyst, exhibiting excellent performance in NO reduction by CO reaction. Moreover, the catalytic performance can stay stable, while 23% NO conversion was lost in the same condition for the one made by the co-precipitation (CP) method. This can be attributed to the synergistic effect of abundant active interfacial sites and more flexible surface oxygen created during the FSP process. The flame technology developed here provides an efficient way to fabricate strong metal–support interactions, exhibiting notable potential in the design of stable Cu-based catalysts.
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Using XRD extrapolation method to design Ce-Cu-O solid solution catalysts for methanol steam reforming to produce H2: The effect of CuO lattice capacity on the reaction performance. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Hou J, Hu J, Chang L, Wang J, Zeng Z, Wu D, Cui X, Bao W, Yao J. Synergistic effects between highly dispersed CuOx and the surface Cu-[Ox]-Ce structure on the catalysis of benzene combustion. J Catal 2022. [DOI: 10.1016/j.jcat.2022.02.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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