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Ye N, Sheng W, Zhang R, Yan B, Jiang Z, Fang T. Interfacial Electron Engineering of PdSn-NbN/C for Highly Efficient Cleavage of the C-C Bonds in Alkaline Ethanol Electrooxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304990. [PMID: 37705122 DOI: 10.1002/smll.202304990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/30/2023] [Indexed: 09/15/2023]
Abstract
The splitting of the C-C bonds of ethanol remains a key issue to be addressed, despite tremendous efforts made over the past several decades. This study highlights the enhancement mechanism of inexpensive NbN-modified Pd1 Sn3 -NbN/C towards the C-C bonds cleavage for alkaline ethanol oxidation reaction (EOR). The optimal Pd1 Sn3 -NbN/C delivers a catalytic activity up to 43.5 times higher than that of commercial Pd/C and high carbonate selectivity (20.5%) toward alkaline EOR. Most impressively, the Pd1 Sn3 -NbN/C presents good durability even after 25 200 s of chronoamperometric testing. The enhanced catalytic performance is mainly due to the interfacial interaction between PdSn and NbN, demonstrated by multiple structural characterization results. In addition, in situ ATR-SEIRAS (Attenuated total reflection-surface enhanced infrared absorption spectroscopy) results suggest that NbN facilitates the C-C bonds cleavage towards the alkaline EOR, followed by the enhanced OH adsorption to promote the subsequent oxidation of C1 intermediates after doping Sn. DFT (density functional theory) calculations indicate that the activation barriers of the C-H bond cleavage in CH3 CH2 OH, CH3 CHOH, CH3 CHO, CH3 CO, CH2 CO, and the C-C bond cleavage in CH3 CO, CH2 CO, CHCO are evidently reduced and the removal of adsorbed CH3 CO and CO becomes easier on the PdSn-NbN/C catalyst surface.
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Affiliation(s)
- Na Ye
- Department of Chemical Engineering, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Engineering Research Center of New Energy System Engineering and Equipment, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Wenchao Sheng
- College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Riguang Zhang
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, 030000, China
| | - Binhang Yan
- Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Zhao Jiang
- Department of Chemical Engineering, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Engineering Research Center of New Energy System Engineering and Equipment, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Tao Fang
- Department of Chemical Engineering, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Engineering Research Center of New Energy System Engineering and Equipment, Xi'an Jiaotong University, Xi'an, 710049, China
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Geng X, Chang T, Fan J, Wang Y, Wang X, Sun Y, Selvarajan P, Liu C, Lin CH, Wang X, Yang J, Cheng Z, Kalantar-Zadeh K, Cao X, Wang D, Vinu A, Yi J, Wu T. Tuning Phase Transition and Thermochromic Properties of Vanadium Dioxide Thin Films via Cobalt Doping. ACS APPLIED MATERIALS & INTERFACES 2022; 14:19736-19746. [PMID: 35465655 DOI: 10.1021/acsami.2c03113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Vanadium dioxide (VO2) featuring a distinct thermally triggered phase transition is regarded as the most attractive thermochromic material for smart window applications. However, the high transition temperature (∼67 °C) and moderate luminous transmittance (<50%) of the pristine VO2 circumvent room temperature applications. In this work, epitaxial cobalt-doped VO2 thin films were fabricated to tailor the electric and optical properties on a c-plane sapphire substrate. At the highest doping concentration of 10%, the transition temperature of VO2 is reduced to 44 °C, accompanied by a high luminous transmittance of 79% for single-element Co-doped VO2. The roles of cobalt doping and detailed band variation are fully explained experimentally and by modeling (DFT calculation), respectively. Furthermore, the dramatically increased carrier concentration in cobalt-doped VO2 underscores the promising future of cobalt-doped VO2 unveiled by temperature-dependent Hall effect measurement.
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Affiliation(s)
- Xun Geng
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
| | - Tianci Chang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi 1295, Changning, Shanghai, 200050, China
| | - Jiaxin Fan
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
| | - Yu Wang
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
| | - Xiaotian Wang
- Institute for Superconducting & Electronic Materials (ISEM), Australia Institute for Innovative Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, New South Wales 2500, Australia
| | - Yunlong Sun
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
| | - Premkumar Selvarajan
- Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Chuang Liu
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
| | - Chun-Ho Lin
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
| | - Xiaolin Wang
- Institute for Superconducting & Electronic Materials (ISEM), Australia Institute for Innovative Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, New South Wales 2500, Australia
| | - Jack Yang
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
| | - Zhenxiang Cheng
- Institute for Superconducting & Electronic Materials (ISEM), Australia Institute for Innovative Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, New South Wales 2500, Australia
| | - Kourosh Kalantar-Zadeh
- The School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Xun Cao
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi 1295, Changning, Shanghai, 200050, China
| | - Danyang Wang
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Jiabao Yi
- Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Tom Wu
- The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
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