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Yu Y, Tan Y, Niu W, Zhao S, Hao J, Shi Y, Dong Y, Liu H, Huang C, Gao C, Zhang P, Wu Y, Zeng L, Du B, He Y. Advances in Synthesis and Applications of Single-Atom Catalysts for Metal Oxide-Based Gas Sensors. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1970. [PMID: 38730776 PMCID: PMC11084526 DOI: 10.3390/ma17091970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/02/2024] [Accepted: 04/11/2024] [Indexed: 05/13/2024]
Abstract
As a stable, low-cost, environment-friendly, and gas-sensitive material, semiconductor metal oxides have been widely used for gas sensing. In the past few years, single-atom catalysts (SACs) have gained increasing attention in the field of gas sensing with the advantages of maximized atomic utilization and unique electronic and chemical properties and have successfully been applied to enhance the detection sensitivity and selectivity of metal oxide gas sensors. However, the application of SACs in gas sensors is still in its infancy. Herein, we critically review the recent advances and current status of single-atom catalysts in metal oxide gas sensors, providing some suggestions for the development of this field. The synthesis methods and characterization techniques of SAC-modified metal oxides are summarized. The interactions between SACs and metal oxides are crucial for the stable loading of single-atom catalysts and for improving gas-sensitive performance. Then, the current application progress of various SACs (Au, Pt, Cu, Ni, etc.) in metal oxide gas sensors is introduced. Finally, the challenges and perspectives of SACs in metal oxide gas sensors are presented.
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Affiliation(s)
- Yuanting Yu
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Yiling Tan
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Wen Niu
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Shili Zhao
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Jiongyue Hao
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Yijie Shi
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Yingchun Dong
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Hangyu Liu
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Chun Huang
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Chao Gao
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
| | - Peng Zhang
- Chongqing Key Laboratory of Toxic and Drug Analysis, Chongqing Police College, Chongqing 401331, China; (P.Z.); (Y.W.)
| | - Yuhong Wu
- Chongqing Key Laboratory of Toxic and Drug Analysis, Chongqing Police College, Chongqing 401331, China; (P.Z.); (Y.W.)
| | - Linggao Zeng
- Chongqing Institute for Food and Drug Control, Chongqing 401121, China;
| | - Bingsheng Du
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
- Chongqing Key Laboratory of Optical Fiber Sensor and Photoelectric Detection, Chongqing University of Technology, Chongqing 400054, China
| | - Yong He
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (Y.Y.); (Y.T.); (W.N.); (S.Z.); (J.H.); (Y.S.); (Y.D.); (H.L.); (C.H.); (C.G.)
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Baweja S, Kazimir A, Lönnecke P, Hey-Hawkins E. Modular Synthesis of Phosphino Hydrazones and Their Use as Ligands in a Palladium-Catalysed Cu-Free Sonogashira Cross-Coupling Reaction. Chempluschem 2023; 88:e202300163. [PMID: 37155325 DOI: 10.1002/cplu.202300163] [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: 03/29/2023] [Revised: 05/04/2023] [Accepted: 05/08/2023] [Indexed: 05/10/2023]
Abstract
Phosphino hydrazones represent a versatile class of nitrogen-containing phosphine ligands. Herein, we report a modular synthesis of phosphino hydrazone ligands by hydrazone condensation reaction of three different aryl hydrazines with 3-(diphenylphosphino)propanal (PCHO). Complexation reactions of these phosphino hydrazone ligands with palladium(II) and platinum(II) were investigated and the catalytic activity of the palladium(II) complexes was explored in a Cu-free Sonogashira cross-coupling reaction achieving yields up to 96 %. Additionally it was shown that the catalytically active species is homogeneous.
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Affiliation(s)
- Saral Baweja
- Faculty of Chemistry and Mineralogy Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
| | - Aleksandr Kazimir
- Faculty of Chemistry and Mineralogy Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
| | - Peter Lönnecke
- Faculty of Chemistry and Mineralogy Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
| | - Evamarie Hey-Hawkins
- Faculty of Chemistry and Mineralogy Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
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Baweja S, Gabler T, Lönnecke P, Hey-Hawkins E. Metal phosphine aldehyde complexes and their application in Cu-free Sonogashira and Suzuki-Miyaura cross-coupling reactions. Dalton Trans 2023; 52:6494-6500. [PMID: 37096400 DOI: 10.1039/d3dt00507k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
Transition metal coordination chemistry and catalysis are rife with phosphine ligands. One of the rather less studied members of the phosphine ligand family are phosphine aldehydes. We have synthesised 3-(diphenylphosphino)propanal (PCHO) with a slight modification of the known procedure and studied its complexation behaviour with palladium(II) and platinum(II). The catalytic activity of the palladium(II) phosphine aldehyde complexes was investigated in Cu-free Sonogashira and Suzuki-Miyaura cross-coupling reactions. Furthermore, the homogeneous nature of the catalytically active species was confirmed.
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Affiliation(s)
- Saral Baweja
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Tom Gabler
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Peter Lönnecke
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Evamarie Hey-Hawkins
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, D-04103 Leipzig, Germany.
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Nguyen YH, Soares JV, Nguyen SH, Wu Y, Wu JI, Teets TS. Platinum(II)-Substituted Phenylacetylide Complexes Supported by Acyclic Diaminocarbene Ligands. Inorg Chem 2022; 61:8498-8508. [PMID: 35609301 DOI: 10.1021/acs.inorgchem.2c00510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We introduce phosphorescent platinum aryl acetylide complexes supported by tert-butyl-isocyanide and strongly σ-donating acyclic diaminocarbene (ADC) ligands. The precursor complexes cis-[Pt(CNtBu)2(C≡CAr)2] (4a-4f) are treated with diethylamine, which undergoes nucleophilic addition with one of the isocyanides to form the cis-[Pt(CNtBu)(ADC)(C≡CAr)2] complexes (5a-5f). The new compounds incorporate either electron-donating groups (4-OMe and 4-NMe2) or electron-withdrawing groups [3,5-(OMe)2, 3,5-(CF3)2, 4-CN, and 4-NO2] on the aryl acetylide. Experimental HOMO-LUMO gaps, estimated from cyclic voltammetry, span the range of 2.68-3.61 eV and are in most cases smaller than the unsubstituted parent complex, as corroborated by DFT. In the ADC complexes, peak photoluminescence wavelengths span the range of 428 nm (2a, unsubstituted phenylacetylide) to 525 nm (5f, 4-NO2-substituted), with the substituents inducing a red shift in all cases. The phosphorescence E0,0 values and electrochemical HOMO-LUMO gaps are loosely correlated, showing that both can be reduced by either electron-donating or electron-withdrawing substituents on the aryl acetylides. The photoluminescence quantum yields in the ADC complexes are between 0.044 and 0.31 and the lifetimes are between 4.8 and 14 μs, a factor of 1.8-10× higher (for ΦPL) and 1.2-3.6× longer (for τ) than the respective isocyanide precursor (ΦPL = 0.014-0.12, τ = 2.8-8.2 μs).
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Affiliation(s)
- Yennie H Nguyen
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
| | - João Vitor Soares
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
| | - Sami H Nguyen
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
| | - Yanyu Wu
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
| | - Judy I Wu
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
| | - Thomas S Teets
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
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Zhou Y, Xi W, Xie Z, You Z, Jiang X, Han B, Lang R, Wu C. High-Loading Pt Single-Atom Catalyst on CeO 2 -Modified Diatomite Support. Chem Asian J 2021; 16:2622-2625. [PMID: 34403212 DOI: 10.1002/asia.202100730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/27/2021] [Indexed: 11/09/2022]
Abstract
Single-atom catalysis has become a new branch in heterogeneous catalysis. Although the naturally produced SiO2 -based materials are abundant and stable, fabrication of single-atom catalysts on such supports with high loading remains as a formidable challenge due to the lack of bonding sites to anchor the isolated metal species. Herein, modifying the diatomite, a kind of pure SiO2 mineral, with CeO2 nanoparticles is demonstrated to increase the defect sites on the support. The enhanced metal-support interaction maintains the atomic dispersion of Pt species with above 1 wt.% loading, exhibiting good performance in the selective hydrogenation of phenylacetylene to styrene.
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Affiliation(s)
- Yang Zhou
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Wei Xi
- Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials, Institute for New Energy Materials, School of Materials, Tianjin University of Technology, Tianjin, 300384, P. R. China
| | - Zixin Xie
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Zhixin You
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Xunzhu Jiang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R.China
| | - Bing Han
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R.China
| | - Rui Lang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Chuande Wu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China.,State Key Laboratory of Silicon Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
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6
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Chen Y, Sun H, Gates BC. Prototype Atomically Dispersed Supported Metal Catalysts: Iridium and Platinum. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2004665. [PMID: 33185034 DOI: 10.1002/smll.202004665] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 09/21/2020] [Indexed: 06/11/2023]
Abstract
When metal nanoparticles on supports are made smaller and smaller-to the limit of atomic dispersion-they become cationic and take on new catalytic properties that are only recently being discovered. The synthesis of these materials is reviewed, including their structure characterization-especially by atomic-resolution electron microscopy and X-ray absorption and infrared spectroscopies-and relationships between structure and catalyst performance, for reactions including hydrogenations, oxidations, and the water gas shift. Structure determination is challenging because of the intrinsic nonuniformity of the support surfaces-and therefore the structures on them-but fundamental understanding has advanced rapidly, benefiting from nearly uniform catalysts consisting of metals on well-defined-crystalline-supports and their characterization by spectroscopy and microscopy. Recent advances in atomic-resolution electron microscopy have spurred the field, providing stunning images and deep insights into structure. The iridium catalysts have typically been made from organoiridium precursors, opening the way to understanding and control of the metal-support bonding and ligands on the metal, including catalytic reaction intermediates. Platinum catalysts are usually made with less precision, from salt precursors, but they catalyze a wider array of reactions than the iridium, typically being stable at higher temperatures and seemingly offering rich prospect for discovery of new catalysts.
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Affiliation(s)
- Yizhen Chen
- Department of Chemical Engineering, University of California-Davis, Davis, CA, 95616, USA
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Hanlei Sun
- Department of Chemical Engineering, University of California-Davis, Davis, CA, 95616, USA
- Department of Chemical and Biochemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Bruce C Gates
- Department of Chemical Engineering, University of California-Davis, Davis, CA, 95616, USA
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Li M, Chen S, Jiang Q, Chen Q, Wang X, Yan Y, Liu J, Lv C, Ding W, Guo X. Origin of the Activity of Co–N–C Catalysts for Chemoselective Hydrogenation of Nitroarenes. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05479] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Muhong Li
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shanyong Chen
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Qike Jiang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Qingliang Chen
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xuan Wang
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yong Yan
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Jian Liu
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Changchang Lv
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Weiping Ding
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xuefeng Guo
- Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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8
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Lang R, Du X, Huang Y, Jiang X, Zhang Q, Guo Y, Liu K, Qiao B, Wang A, Zhang T. Single-Atom Catalysts Based on the Metal–Oxide Interaction. Chem Rev 2020; 120:11986-12043. [DOI: 10.1021/acs.chemrev.0c00797] [Citation(s) in RCA: 203] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Rui Lang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Xiaorui Du
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yike Huang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xunzhu Jiang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qian Zhang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yalin Guo
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kaipeng Liu
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Botao Qiao
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Aiqin Wang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Tao Zhang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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9
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Hejazi S, Mohajernia S, Osuagwu B, Zoppellaro G, Andryskova P, Tomanec O, Kment S, Zbořil R, Schmuki P. On the Controlled Loading of Single Platinum Atoms as a Co-Catalyst on TiO 2 Anatase for Optimized Photocatalytic H 2 Generation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1908505. [PMID: 32125728 DOI: 10.1002/adma.201908505] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 02/04/2020] [Indexed: 05/21/2023]
Abstract
Single-atom (SA) catalysis is a novel frontline in the catalysis field due to the often drastically enhanced specific activity and selectivity of many catalytic reactions. Here, an atomic-scale defect engineering approach to form and control traps for platinum SA sites as co-catalyst for photocatalytic H2 generation is described. Thin sputtered TiO2 layers are used as a model photocatalyst, and compared to the more frequently used (001) anatase sheets. To form stable SA platinum, the TiO2 layers are reduced in Ar/H2 under different conditions (leading to different but defined Ti3+ -Ov surface defects), followed by immersion in a dilute hexachloroplatinic acid solution. HAADF-STEM results show that only on the thin-film substrate can the density of SA sites be successfully controlled by the degree of reduction by annealing. An optimized SA-Pt decoration can enhance the normalized photocatalytic activity of a TiO2 sputtered sample by 150 times in comparison to a conventional platinum-nanoparticle-decorated TiO2 surface. HAADF-STEM, XPS, and EPR investigation jointly confirm the atomic nature of the decorated Pt on TiO2 . Importantly, the density of the relevant surface exposed defect centers-thus the density of Pt-SA sites, which play the key role in photocatalytic activity-can be precisely optimized.
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Affiliation(s)
- Seyedsina Hejazi
- Department of Materials Science, University of Erlangen-Nuremberg, Institute for Surface Science and Corrosion WW4-LKO, Martensstraße 7, D-91058, Erlangen, Germany
| | - Shiva Mohajernia
- Department of Materials Science, University of Erlangen-Nuremberg, Institute for Surface Science and Corrosion WW4-LKO, Martensstraße 7, D-91058, Erlangen, Germany
| | - Benedict Osuagwu
- Department of Materials Science, University of Erlangen-Nuremberg, Institute for Surface Science and Corrosion WW4-LKO, Martensstraße 7, D-91058, Erlangen, Germany
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Palacky University Olomouc, Listopadu 50A, 772 07, Olomouc, Czech Republic
| | - Pavlina Andryskova
- Regional Centre of Advanced Technologies and Materials, Palacky University Olomouc, Listopadu 50A, 772 07, Olomouc, Czech Republic
| | - Ondrej Tomanec
- Regional Centre of Advanced Technologies and Materials, Palacky University Olomouc, Listopadu 50A, 772 07, Olomouc, Czech Republic
| | - Stepan Kment
- Regional Centre of Advanced Technologies and Materials, Palacky University Olomouc, Listopadu 50A, 772 07, Olomouc, Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Palacky University Olomouc, Listopadu 50A, 772 07, Olomouc, Czech Republic
| | - Patrik Schmuki
- Department of Materials Science, University of Erlangen-Nuremberg, Institute for Surface Science and Corrosion WW4-LKO, Martensstraße 7, D-91058, Erlangen, Germany
- Regional Centre of Advanced Technologies and Materials, Palacky University Olomouc, Listopadu 50A, 772 07, Olomouc, Czech Republic
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10
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Liu Q, Zhang Z. Platinum single-atom catalysts: a comparative review towards effective characterization. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01028a] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This review summaries the characterization techniques for Pt single-atom catalysts and focuses on FT-EXAFS spectroscopy to study the coordination environment of Pt–M for atomically dispersed Pt catalysts on diverse supports.
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Affiliation(s)
- Qing Liu
- Key Laboratory of Low Carbon Energy and Chemical Engineering
- College of Chemical and Environmental Engineering
- Shandong University of Science and Technology
- Qingdao
- China
| | - Zailei Zhang
- CAS Center for Excellence in Nanoscience
- Beijing Institute of Nanoenergy and Nanosystems
- Chinese Academy of Sciences
- Beijing 100083
- China
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11
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Arandiyan H, Wang Y, Sun H, Rezaei M, Dai H. Ordered meso- and macroporous perovskite oxide catalysts for emerging applications. Chem Commun (Camb) 2018; 54:6484-6502. [DOI: 10.1039/c8cc01239c] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Hierarchically ordered perovskite materials which have potential applications in chemistry, energy and materials science.
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Affiliation(s)
- Hamidreza Arandiyan
- Laboratory of Advanced Catalysis for Sustainability
- School of Chemistry
- The University of Sydney
- Sydney 2006
- Australia
| | - Yuan Wang
- Particles and Catalysis Research Group
- School of Chemical Engineering
- The University of New South Wales
- Sydney 2052
- Australia
| | - Hongyu Sun
- Department of Micro- and Nanotechnology
- Technical University of Denmark
- Kongens Lyngby 2800
- Denmark
| | - Mehran Rezaei
- Catalyst and Advanced Materials Research Laboratory
- Chemical Engineering Department
- University of Kashan
- Kashan
- Iran
| | - Hongxing Dai
- Beijing Key Laboratory for Green Catalysis and Separation
- College of Environmental and Energy Engineering
- Beijing University of Technology
- Beijing 100124
- China
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