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Cheng Z, Yang Y, Wang P, Wang P, Yang J, Wang D, Chen Q. Optimizing Hydrogen and Hydroxyl Adsorption over Ru/WO 2.9 Metal/Metalloid Heterostructure Electrocatalysts for Highly Efficient and Stable Hydrogen Oxidation Reactions in Alkaline Media. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2307780. [PMID: 38168535 DOI: 10.1002/smll.202307780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/06/2023] [Indexed: 01/05/2024]
Abstract
The development of high-performance, stable and platinum-free electrocatalysts for the hydrogen oxidation reaction (HOR) in alkaline media is crucial for the commercial application of anion exchange membrane fuel cells (AEMFCs). Ruthenium, as an emerging HOR electrocatalyst with a price advantage over platinum, still needs to solve the problems of low intrinsic activity and easy oxidation. Herein, Ru nanoparticles are anchored on the oxygen-vacancy-rich metalloid WO2.9 by interfacial engineering to create abundant and efficient Ru and WO2.9 interfacial active sites for accelerated HOR in alkaline media. Ru/WO2.9 /C displays excellent catalytic activity with mass activity (8.29 A mgNM -1 ) and specific activity (1.32 mA cmNM -2 ), which are 2.5/3.3 and 21.8/8.3 times that of PtRu/C and Pt/C, respectively. Moreover, Ru/WO2.9 /C exhibits excellent CO tolerance and operational stability. Experimental and theoretical studies reveal that the improved charge transfer from Ru to WO2.9 in the metal/metalloid heterostructure significantly tune the electronic structure of Ru sites and optimize the hydrogen binding energy (HBE) of Ru. While, WO2.9 provides abundant hydroxyl adsorption sites. Therefore, the equilibrium adsorption of hydrogen and hydroxyl at the interface of Ru/WO2.9 will be realized, and the oxidation of metal Ru would be avoided, thereby achieving excellent HOR activity and durability.
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Affiliation(s)
- Zhiyu Cheng
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Yang Yang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Peichen Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Pengcheng Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Jiahe Yang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Dongdong Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Qianwang Chen
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
- The High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, China
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Kumari P, Poornesh P, Chattopadhyay S, Rao A, Kulkarni SD. Evaluation of Zn: WO 3 Thin Films as a Sensing Layer for Detection of NH 3 Gas. MICROMACHINES 2023; 14:732. [PMID: 37420965 DOI: 10.3390/mi14040732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 03/13/2023] [Accepted: 03/24/2023] [Indexed: 07/09/2023]
Abstract
Pristine WO3 and Zn-doped WO3 were synthesized using the spray pyrolysis technique to detect ammonia gas. The prominent orientation of the crystallites along the (200) plane was evident from X-ray diffraction (XRD) studies. Scanning Electron Microscope (SEM) morphology indicated well-defined grains upon Zn doping with a smaller grain size of 62 nm for Zn-doped WO3 (Zn: WO3) film. The photoluminescence (PL) emission at different wavelengths was assigned to defects such as oxygen vacancies, interstitial oxygens, localized defects, etc. X-ray Photoelectron spectroscopy (XPS) studies confirmed the formation of oxygen vacancies in the deposited films. The ammonia (NH3) sensing analysis of the deposited films was carried out at an optimum working temperature of 250 °C. The sensor performance of Zn: WO3 was enhanced compared to pristine WO3 at 1 ppm NH3 concentration, elucidating the possibility of the films in sensing applications.
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Affiliation(s)
- Priyanka Kumari
- Department of Chemistry, School of Basic Sciences, Manipal University Jaipur, Jaipur 303007, India
| | - P Poornesh
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India
| | - Saikat Chattopadhyay
- Department of Physics, School of Basic Sciences, Manipal University Jaipur, Jaipur 303007, India
| | - Ashok Rao
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India
| | - Suresh D Kulkarni
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576104, India
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Patel A, Lu W, Birmingham B, Johnson M, Wang D, Zhang Z, Wang K. Enhanced photoluminescence of potassium-doped tungsten oxide by acetone exposure. RSC Adv 2023; 13:1236-1244. [PMID: 36686925 PMCID: PMC9812020 DOI: 10.1039/d2ra06267d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 12/19/2022] [Indexed: 01/05/2023] Open
Abstract
Studies of optical properties of doped nanocrystals of tungsten trioxide can elucidate new information about the material. A novel molecule-enhanced photoluminescence (PL) of potassium-doped tungsten trioxide (K x WO) was explored in the presence of different gases to understand charge transfer between molecules and K x WO on the properties of the material. We performed Raman spectroscopy and PL experiments in the presence of gaseous acetone or ethanol mixed with other gases (N2 and O2). PL at 630 nm from K x WO was observed and further enhanced when the sample was continuously irradiated with a 532 nm CW laser in acetone. A mechanism of strong emission of the PL induced by the charge transfer between the acetone and the K x WO is proposed.
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Affiliation(s)
- Aman Patel
- Department of Physics, Baylor UniversityWaco76798TexasUSA
| | - Weigang Lu
- Department of Physics, Baylor UniversityWaco76798TexasUSA
| | | | - Michael Johnson
- Department of Electrical and Computer Engineering, North Dakota State UniversityFargo 58102NDUSA
| | - Danling Wang
- Department of Electrical and Computer Engineering, North Dakota State UniversityFargo 58102NDUSA
| | - Zhenrong Zhang
- Department of Physics, Baylor UniversityWaco76798TexasUSA
| | - Kai Wang
- School of Physics and Astronomy, Sun Yat-sen UniversityZhuhai 519082China,Center of Quantum Information Technology, Shenzhen Research Institute of Sun Yat-sen UniversityNanshan Shenzhen 518087China
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M M, S. G, S V, N. Y M. Structural, morphological, optical properties of Zr- doped Co 3O 4 nanoparticles. PARTICULATE SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1080/02726351.2021.1992057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mayakannan M
- PG & Research Department of Physics, Government Arts College, Tiruvannamalai, India
| | - Gopinath S.
- PG & Research Department of Physics, Government Arts College, Tiruvannamalai, India
| | - Vetrivel S
- Department of Physics, Lady Willingdon College of Education, Chennai, India
| | - Maharani N. Y
- Department of Physics, Gopalan College of Engineering and Management, Bangalore, India
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Jerold Antony A, Mary Jelastin Kala S, Joel C, Biju Bennie R, Vivetha S. Structural, optical, and magnetic properties of pristine and Cr doped WO 3 nanoparticles. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2021.2025395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- A. Jerold Antony
- Research Department of Chemistry, St. Xavier’s College (Autonomous), Tirunelveli, India
- Manonmaniam Sundaranar University, Tirunelveli, India
| | - S. Mary Jelastin Kala
- Research Department of Chemistry, St. Xavier’s College (Autonomous), Tirunelveli, India
- Manonmaniam Sundaranar University, Tirunelveli, India
| | - C. Joel
- Manonmaniam Sundaranar University, Tirunelveli, India
- Department of Chemistry, St. John’s College, Tirunelveli, India
| | - R. Biju Bennie
- Manonmaniam Sundaranar University, Tirunelveli, India
- Department of Chemistry, St. John’s College, Tirunelveli, India
| | - S. Vivetha
- Manonmaniam Sundaranar University, Tirunelveli, India
- Department of Chemistry, St. John’s College, Tirunelveli, India
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Influence of morphology on photoanodic behaviour of WO3 films in chloride and sulphate electrolytes. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ma H, Yang W, Gao S, Lin Z, Mo Z, Li C, Shang JK, Li Q. Photoirradiation-Induced Capacitance Enhancement in the h-WO 3/Bi 2WO 6 Submicron Rod Heterostructure under Simulated Solar Illumination and Its Postillumination Capacitance Enhancement Retainment from a Photocatalytic Memory Effect. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57214-57229. [PMID: 34806874 DOI: 10.1021/acsami.1c17386] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Recently, photoassisted charging has been demonstrated as a green and sustainable approach to successfully enhance the capacitance of supercapacitors with low cost and good efficiency. However, their light-induced capacitance enhancement is relatively low and is lost quickly when the illumination is off. In this work, a novel active material system is developed for supercapacitors with the photoassisted charging capability by the decoration of a small amount of Bi2WO6 nanoparticles on an h-WO3 submicron rod surface in situ, which forms a typical type II band alignment heterostructure with a close contact interface through the co-sharing of W atoms between h-WO3 submicron rods and Bi2WO6 nanoparticles. The photogenerated charge carrier separation and transfer are largely enhanced in the h-WO3/Bi2WO6 submicron rod electrode, which subsequently allows more charge carriers to participate in its photoassisted charging process to largely enhance its capacitance improvement under simulated solar illumination than that of the h-WO3 submicron rod electrode. Furthermore, the h-WO3/Bi2WO6 submicron rod electrode could retain its photoinduced capacitance enhancement in the dark for an extended period of time from the photocatalytic memory effect. Thus, our work provides a solution to the two major drawbacks of reported supercapacitors with the light-induced capacitance enhancement property, and supercapacitors based on active materials with the photocatalytic memory effect could be utilized in various technical fields.
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Affiliation(s)
- Huiqin Ma
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, P. R. China
| | - Weiyi Yang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, No. 111, Section 1, Northern Second Ring Road, Chengdu 610031, P. R. China
| | - Shuang Gao
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, No. 111, Section 1, Northern Second Ring Road, Chengdu 610031, P. R. China
| | - Zifeng Lin
- College of Materials Science and Engineering, Sichuan University, Chengdu 610041, P. R. China
| | - Zheyang Mo
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, P. R. China
| | - Chao Li
- School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, P. R. China
| | - Jian Ku Shang
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, P. R. China
| | - Qi Li
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, No. 111, Section 1, Northern Second Ring Road, Chengdu 610031, P. R. China
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Americo S, Pargoletti E, Soave R, Cargnoni F, Trioni MI, Chiarello GL, Cerrato G, Cappelletti G. Unveiling the acetone sensing mechanism by WO3 chemiresistors through a joint theory-experiment approach. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137611] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Ohno A, Watanabe H, Matsui T, Somekawa S, Tomisaki M, Einaga Y, Oaki Y, Imai H. Efficient photocatalytic conversion of benzene to phenol on stabilized subnanometer WO 3 quantum dots. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01310f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Subnanometer WO3 quantum dots are spontaneously produced in a mesoporous silica matrix. Efficient photocatalytic conversion of benzene to phenol without decomposition of the product is realized by band engineering with a strong quantum size effect.
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Affiliation(s)
- Akihide Ohno
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Hiroto Watanabe
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi. Koto-ku, Tokyo 135-0064, Japan
| | - Takahiro Matsui
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Shoichi Somekawa
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi. Koto-ku, Tokyo 135-0064, Japan
| | - Mai Tomisaki
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yasuaki Einaga
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yuya Oaki
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Hiroaki Imai
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Yuan L, Li YH, Tang ZR, Gong J, Xu YJ. Defect-promoted visible light-driven C C coupling reactions pairing with CO2 reduction. J Catal 2020. [DOI: 10.1016/j.jcat.2020.07.036] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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