1
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Luo Z, Yi H, Yang Z, Wang C. Bimetallic Sulfur-Doped Nickel-Cobalt Selenides as Efficient Bifunctional Electrocatalysts for the Complete Decomposition of Water. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402954. [PMID: 39246215 DOI: 10.1002/smll.202402954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 08/25/2024] [Indexed: 09/10/2024]
Abstract
The creation and enhancement of non-precious metal bifunctional catalysts with superior stability and stabilizing activity is necessary to achieve water splitting in alkaline media. The paper presents a method for preparing nickel-cobalt bimetallic selenides (NiCo-Sex/CF) using a combination of hydrothermal and high-temperature selenization techniques. NiCo-Sex/CF shows great potential as a catalyst for water separation. The catalyst's electronic structure and active centre can be modified by double doping with sulfur and selenium, resulting in increased selectivity and activity under varying reaction conditions. This method also offers the benefits of a simple preparation process and applicability to a wide range of catalytic reactions. Experimental results demonstrate that an overpotential of 194 mV produces a current density of 10 mA cm-2 when using this electrocatalyst as an OER catalyst. When used as a HER catalyst, the electrocatalyst required an overpotential of only 76 mV to generate a current density of 10 mA cm-2.Furthermore, a voltage of 1.5 V can drive the overall decomposition of water to achieve a current density of 10 mA cm-2. This study highlights the potential of sulfur-selenide double-doped catalysts for both scientific research and practical applications.
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Affiliation(s)
- ZhongKe Luo
- School of Materials Science and Engineering, North University of China, Taiyuan, 030051, P. R. China
- Institute of Advanced Energy Materials and System, North University of China, Taiyuan, 030051, P. R. China
| | - Hao Yi
- School of Materials Science and Engineering, North University of China, Taiyuan, 030051, P. R. China
- Institute of Advanced Energy Materials and System, North University of China, Taiyuan, 030051, P. R. China
| | - ZiHan Yang
- School of Materials Science and Engineering, North University of China, Taiyuan, 030051, P. R. China
- Institute of Advanced Energy Materials and System, North University of China, Taiyuan, 030051, P. R. China
| | - Chao Wang
- School of Materials Science and Engineering, North University of China, Taiyuan, 030051, P. R. China
- Institute of Advanced Energy Materials and System, North University of China, Taiyuan, 030051, P. R. China
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2
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Bulanadi R, Cordero-Edwards K, Tückmantel P, Saremi S, Morpurgo G, Zhang Q, Martin LW, Nagarajan V, Paruch P. Interplay between Point and Extended Defects and Their Effects on Jerky Domain-Wall Motion in Ferroelectric Thin Films. PHYSICAL REVIEW LETTERS 2024; 133:106801. [PMID: 39303254 DOI: 10.1103/physrevlett.133.106801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 06/07/2024] [Indexed: 09/22/2024]
Abstract
Defects have a significant influence on the polarization and electromechanical properties of ferroelectric materials. Statistically, they can be seen as random pinning centers acting on an elastic manifold, slowing domain-wall propagation and raising the energy required to switch polarization. Here we show that the "dressing" of defects can lead to unprecedented control of domain-wall dynamics. We engineer defects of two different dimensionalities in ferroelectric oxide thin films-point defects externally induced via He^{2+} bombardment, and extended quasi-one-dimensional a domains formed in response to internal strains. The a domains act as extended strong pinning sites (as expected) imposing highly localized directional constraints. Surprisingly, the induced point defects in the He^{2+} bombarded samples orient and align to impose further directional pinning, screening the effect of a domains. This defect interplay produces more uniform and predictable domain-wall dynamics. Such engineered interactions between defects are crucial for advancements in ferroelectric devices.
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Affiliation(s)
| | | | | | | | | | | | - Lane W Martin
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Departments of Materials Science and NanoEngineering, Chemistry, and Physics and Astronomy, Rice University, Houston, Texas 77005, USA
- Rice Advanced Materials Institute, Rice University, Houston, Texas 77005, USA
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3
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Anilkumar GM, Bhakar M, Taneja C, Hwang S, Kumar GVP, Sheet G, Rahman A. Near Room Temperature Solvothermal Growth of Ferroelectric CsPbBr 3 Nanoplatelets with Ultralow Dark Current. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2403875. [PMID: 39051946 DOI: 10.1002/adma.202403875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 06/27/2024] [Indexed: 07/27/2024]
Abstract
CsPbBr3 exhibits outstanding optoelectronic properties and thermal stability, making it a coveted material for detectors, light-emitting diodes, and solar cells. Despite observations of ferroelectricity in CsPbBr3 quantum dots, synthesizing bulk ferroelectric CsPbBr3 crystals has remained elusive, hindering its potential in next-generation optoelectronic devices like optical switches and ferroelectric photovoltaics. Here, a breakthrough is reported: a novel solvothermal technique enabling the growth of ferroelectric CsPbBr3 nanoplatelets with lateral dimensions in the tens of micrometers. This represents a significant step toward achieving large-area ferroelectric CsPbBr3 crystals. Unlike traditional methods, this approach allows for growth and crystallization of CsPbBr3 in alcohol solutions by enhancing precursor solubility. This study confirms the ferroelectric nature of these nanoplatelets using second harmonic generation, electrical characterizations, and piezoresponse force microscopy. This work paves the way for utilizing ferroelectric CsPbBr3 in novel optoelectronic devices, significantly expanding the potential of this material and opening doors for further exploration in this exciting field.
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Affiliation(s)
- Gokul M Anilkumar
- Department of Physics, Indian Institute for Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Monika Bhakar
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali Knowledge City, Sector 81, Mohali, 140306, India
| | - Chetna Taneja
- Department of Physics, Indian Institute for Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Sooyeon Hwang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - G V Pavan Kumar
- Department of Physics, Indian Institute for Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Goutam Sheet
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali Knowledge City, Sector 81, Mohali, 140306, India
| | - Atikur Rahman
- Department of Physics, Indian Institute for Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
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4
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Shen Y, Mao L, Lin R, Li Q, Qian J. The N-anchoring effect in NH 2-functionalized MOF-derived iron-carbon nanomaterials for oxygen reduction. Chem Commun (Camb) 2024; 60:9250-9253. [PMID: 39118543 DOI: 10.1039/d4cc02873b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2024]
Abstract
The incorporation of an iron source into NH2-MOF-5, followed by thermal decomposition, yields a porous metal-carbon catalyst (MOF5A-Fe@NC). This catalyst possesses significant N content, a high degree of graphitization, and abundant Fe-Nx sites, which contribute to enhanced oxygen reduction. Specifically, the obtained MOF5A-Fe@NC demonstrates a positive onset potential (0.972 V), a substantial limiting current density (4.815 mA cm-2), and a small Tafel slope (58.7 mV dec-1), and maintains a high current retention of 96.3% after 10 hours.
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Affiliation(s)
- Yanqiong Shen
- College of Chemistry and Chemical Engineering, Zhaotong University, Zhaotong 657000, Yunnan, P. R. China.
| | - Lujiao Mao
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang, P. R. China.
| | - Rong Lin
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang, P. R. China.
| | - Qipeng Li
- College of Chemistry and Chemical Engineering, Zhaotong University, Zhaotong 657000, Yunnan, P. R. China.
| | - Jinjie Qian
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang, P. R. China.
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5
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Zang P, Yu C, Zhang R, Yang D, Gai S, Yang P, Lin J. Revealing the Optimization Route of Piezoelectric Sonosensitizers: From Mechanism to Engineering Methods. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401650. [PMID: 38712474 DOI: 10.1002/smll.202401650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 04/17/2024] [Indexed: 05/08/2024]
Abstract
Piezoelectric catalysis is a novel catalytic technology that has developed rapidly in recent years and has attracted extensive interest among researchers in the field of tumor therapy for its acoustic-sensitizing properties. Nevertheless, researchers are still controversial about the key technical difficulties in the modulation of piezoelectric sonosensitizers for tumor therapy applications, which is undoubtedly a major obstacle to the performance modulation of piezoelectric sonosensitizers. Clarification of this challenge will be beneficial to the design and optimization of piezoelectric sonosensitizers in the future. Here, the authors start from the mechanism of piezoelectric catalysis and elaborate the mechanism and methods of defect engineering and phase engineering for the performance modulation of piezoelectric sonosensitizers based on the energy band theory. The combined therapeutic strategy of piezoelectric sonosensitizers with enzyme catalysis and immunotherapy is introduced. Finally, the challenges and prospects of piezoelectric sonosensitizers are highlighted. Hopefully, the explorations can guide researchers toward the optimization of piezoelectric sonosensitizers and can be applied in their own research.
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Affiliation(s)
- Pengyu Zang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Chenghao Yu
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Rui Zhang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Dan Yang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Shili Gai
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Piaoping Yang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Sciences and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Jun Lin
- State Key Laboratory of Rare Earth Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
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6
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Cheng P, An Y, Jen AKY, Lei D. New Nanophotonics Approaches for Enhancing the Efficiency and Stability of Perovskite Solar Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2309459. [PMID: 37878233 DOI: 10.1002/adma.202309459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/13/2023] [Indexed: 10/26/2023]
Abstract
Over the past decade, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has experienced a remarkable ascent, soaring from 3.8% in 2009 to a remarkable record of 26.1% in 2023. Many recent approaches for improving PSC performance employ nanophotonic technologies, from light harvesting and thermal management to the manipulation of charge carrier dynamics. Plasmonic nanoparticles and arrayed dielectric nanostructures have been applied to tailor the light absorption, scattering, and conversion, as well as the heat dissipation within PSCs to improve their PCE and operational stability. In this review, it is begin with a concise introduction to define the realm of nanophotonics by focusing on the nanoscale interactions between light and surface plasmons or dielectric photonic structures. Prevailing strategies that utilize resonance-enhanced light-matter interactions for boosting the PCE and stability of PSCs from light trapping, carrier transportation, and thermal management perspectives are then elaborated, and the resultant practical applications, such as semitransparent photovoltaics, colored PSCs, and smart perovskite windows are discussed. Finally, the state-of-the-art nanophotonic paradigms in PSCs are reviewed, and the benefits of these approaches in improving the aesthetic effects and energy-saving character of PSC-integrated buildings are highlighted.
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Affiliation(s)
- Pengfei Cheng
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
- The Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
| | - Yidan An
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
- The Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
| | - Alex K-Y Jen
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
- The Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
- State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
| | - Dangyuan Lei
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
- The Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, Hong Kong, 999077, China
- Hong Kong Branch of National Precious Metals Material Engineering Research Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, China
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7
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Zhao Z, Zhang T, Yue S, Wang P, Bao Y, Zhan S. Spin Polarization: A New Frontier in Efficient Photocatalysis for Environmental Purification and Energy Conversion. Chemphyschem 2024; 25:e202300726. [PMID: 38059760 DOI: 10.1002/cphc.202300726] [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: 10/03/2023] [Revised: 11/28/2023] [Accepted: 12/01/2023] [Indexed: 12/08/2023]
Abstract
As a promising strategy to improve photocatalytic efficiency, spin polarization has attracted enormous attention in recent years, which could be involved in various steps of photoreaction. The Pauli repulsion principle and the spin selection rule dictate that the behavior of two electrons in a spatial eigenstate is based on their spin states, and this fact opens up a new avenue for manipulating photocatalytic efficiency. In this review, recent advances in modulating the photocatalytic activity with spin polarization are systematically summarized. Fundamental insights into the influence of spin-polarization effects on photon absorption, carrier separation, and migration, and the behaviors of reaction-related substances from the photon uptake to reactant desorption are highlighted and discussed in detail, and various photocatalytic applications for environmental purification and energy conversion are presented. This review is expected to deliver a timely overview of the recent developments in spin-polarization-modulated photocatalysis for environmental purification and energy conversion in terms of their practical applications.
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Affiliation(s)
- Zhiyong Zhao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Tao Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Shuai Yue
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Pengfei Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Yueping Bao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Sihui Zhan
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
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8
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Han C, Kundu BK, Liang Y, Sun Y. Near-Infrared Light-Driven Photocatalysis with an Emphasis on Two-Photon Excitation: Concepts, Materials, and Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307759. [PMID: 37703435 DOI: 10.1002/adma.202307759] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/01/2023] [Indexed: 09/15/2023]
Abstract
Efficient utilization of sunlight in photocatalysis is widely recognized as a promising solution for addressing the growing energy demand and environmental issues resulting from fossil fuel consumption. Recently, there have been significant developments in various near-infrared (NIR) light-harvesting systems for artificial photosynthesis and photocatalytic environmental remediation. This review provides an overview of the most recent advancements in the utilization of NIR light through the creation of novel nanostructured materials and molecular photosensitizers, as well as modulating strategies to enhance the photocatalytic processes. A special focus is given to the emerging two-photon excitation NIR photocatalysis. The unique features and limitations of different systems are critically evaluated. In particular, it highlights the advantages of utilizing NIR light and two-photon excitation compared to UV-visible irradiation and one-photon excitation. Ongoing challenges and potential solutions for the future exploration of NIR light-responsive materials are also discussed.
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Affiliation(s)
- Chuang Han
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Bidyut Kumar Kundu
- Department of Chemistry, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Yujun Liang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Yujie Sun
- Department of Chemistry, University of Cincinnati, Cincinnati, OH, 45221, USA
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9
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Ren T, He T, Cao Z, Xing P, Teng X, Li G. Enhanced Catalytic Performance of Ag NP/0.95AgNbO 3-0.05LiTaO 3 Heterojunction from the Combination of Surface Plasma Resonance Effect and Piezoelectric Effect Using Facile Mechanical Milling. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2972. [PMID: 37999326 PMCID: PMC10675161 DOI: 10.3390/nano13222972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/04/2023] [Accepted: 11/15/2023] [Indexed: 11/25/2023]
Abstract
An internal built electric field can suppress the recombination of electron-hole pairs and distinctly enhance the catalytic activity of a photocatalyst. Novel t-Ag/0.95AgNbO3-0.05LiTaO3 heterojunction was prepared by reducing silver nanoparticles (Ag NPs) on the surface of the piezoelectric powder 0.95AgNbO3-0.05LiTaO3 (0.05-ANLT) using a simple mechanical milling method. The effects of milling time and excitation source used for the degradation of organic dye by heterojunction catalysts were investigated. The results demonstrate that the optimized 1.5-Ag/0.05-ANLT heterojunction removes 97% RhB within 40 min, which is 7.8 times higher than that of single piezoelectric catalysis and 25.4 times higher than that of single photocatalysis. The significant enhancement of photocatalytic activity can be attributed to the synergistic coupling of the surface plasmon resonance (SPR) effect and the piezoelectric effect.
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Affiliation(s)
- Tianxiang Ren
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, China; (T.R.); (T.H.); (P.X.); (X.T.)
| | - Tufeng He
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, China; (T.R.); (T.H.); (P.X.); (X.T.)
| | - Zhenzhu Cao
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, China; (T.R.); (T.H.); (P.X.); (X.T.)
- Engineering Research Center of Large Energy Storage Technology, Ministry of Education, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Pengyue Xing
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, China; (T.R.); (T.H.); (P.X.); (X.T.)
| | - Xinglong Teng
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, China; (T.R.); (T.H.); (P.X.); (X.T.)
| | - Guorong Li
- Key Laboratory of Inorganic Function Material and Device, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
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10
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Raveendran A, Chandran M, Siddiqui MR, Wabaidur SM, Eswaran M, Dhanusuraman R. Layer-by-Layer Assembly of CTAB-rGO-Modified MXene Hybrid Films as Multifunctional Electrodes for Hydrogen Evolution and Oxygen Evolution Reactions, Supercapacitors, and DMFC Applications. ACS OMEGA 2023; 8:34768-34786. [PMID: 37780023 PMCID: PMC10536025 DOI: 10.1021/acsomega.3c03827] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 08/31/2023] [Indexed: 10/03/2023]
Abstract
Exceptional electrical conductivity and abundance of surface terminations like-F- and OH- leading to hydrophilicity make the family of 2D transition metal carbides/nitrides and carbonitrides (MXene) excellent candidates for energy storage and conversion applications. MXenes, however, undergo restacking of nanosheets via van der Waals interaction, hindering the active sites, leading to slow electronic and ionic kinetics, and ultimately affecting their electrochemical performance. Herein, we report binder-free cetyltrimethylammonium bromide-reduced graphene oxide (CTAB-rGO)-modified MXene hybrid films on nickel foam as a promising noble metal-free multifunctional electrode synthesized via layer-by-layer assembly and dip coating techniques, which effectively reduce restacking while improving the kinetics. The properties of the as-prepared electrocatalysts are investigated using various physiochemical characterizations and electrochemical measurements to accomplish the objective of "creating one kind of electrocatalyst for multiapplication" with a thorough understanding of the relationship between the material structure, morphology, and electrocatalytic performance. In energy conversion, the synergetic effect of MXene and the CTAB-rGO support helped increase the catalytic activity of the composite for electrochemical water splitting, demonstrating a current density of 10 mA/cm2 at an overpotential (η) of 360 V and a Tafel slope value of 56.6 mV/dec for hydrogen evolution reaction and a current density of 10 mA/cm2 at an overpotential (η) of 179 mV and a Tafel slope value of 47.03 mV/dec for oxygen evolution reaction in an alkaline medium. The electrode material also exhibited a higher oxidation current density (373.60 mA/cm2) compared to that of synthesized MXene toward methanol oxidation reaction in direct methanol fuel cell application. Additionally, the energy storage potential of CTAB-rGO modified MXene as electrode materials for supercapacitors with a high specific capacitance (544.50 F g-1 at 0.5 A g-1) and a good capacity retention of 87% after 5000 cycles was studied. These findings of this work showcase the potential of the electrocatalyst in both conversion and storage of electrochemical energy.
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Affiliation(s)
- Asha Raveendran
- Nano
Electrochemistry Lab (NEL), Department of Chemistry, National Institute of Technology Puducherry, Karaikal 609609, India
| | - Mijun Chandran
- Department
of Chemistry, Central University of Tamil
Nadu, Thiruvarur 610005, India
| | - Masoom Raza Siddiqui
- Chemistry
Department, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | | | - Muthusankar Eswaran
- Division
of Systems and Synthetic Biology, Department of Biology and Biological
Engineering, Chalmers University of Technology, Göteborg 41296, Sweden
| | - Ragupathy Dhanusuraman
- Nano
Electrochemistry Lab (NEL), Department of Chemistry, National Institute of Technology Puducherry, Karaikal 609609, India
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11
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Yang G, Wang S, Wu Y, Zhou H, Zhao W, Zhong S, Liu L, Bai S. Spatially Separated Redox Cocatalysts on Ferroelectric Nanoplates for Improved Piezophotocatalytic CO 2 Reduction and H 2O Oxidation. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 36897222 DOI: 10.1021/acsami.2c20685] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Utilizing solar and mechanical vibration energy for catalytic CO2 reduction and H2O oxidation is emerging as a promising way to simultaneously generate renewable energy and mitigate climate change, making it possible to integrate two energy resources into a reaction system for artificial piezophotosynthesis. However, the practical applications are hindered by undesirable charge recombination and sluggish surface reaction in the photocatalytic and piezocatalytic processes. This study proposes a dual cocatalyst strategy to overcome these obstacles and improve the piezophotocatalytic performance of ferroelectrics in overall redox reactions. With the photodeposition of AuCu reduction and MnOx oxidation cocatalysts on oppositely poled facets of PbTiO3 nanoplates, band bending occurs along with the formation of built-in electric fields on the semiconductor-cocatalyst interfaces, which, together with an intrinsic ferroelectric field, piezoelectric polarization field, and band tilting in the bulk of PbTiO3, provide strong driving forces for the directional drift of piezo- and photogenerated electrons and holes toward AuCu and MnOx, respectively. Besides, AuCu and MnOx enrich the active sites for surface reactions, significantly reducing the rate-determining barrier for CO2-to-CO and H2O-to-O2 transformation, respectively. Benefiting from these features, AuCu/PbTiO3/MnOx delivers remarkably improved charge separation efficiencies and significantly enhanced piezophotocatalytic activities in CO and O2 generation. This strategy opens a door for the better coupling of photocatalysis and piezocatalysis to promote the conversion of CO2 with H2O.
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Affiliation(s)
- Guodong Yang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Shihong Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Yujie Wu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Hao Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Wei Zhao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Shuxian Zhong
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Lichun Liu
- College of Biological, Chemical Sciences and Engineering & Nanotechnology Research Institute, Jiaxing University, Jiaxing, Zhejiang 314000, China
| | - Song Bai
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
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Yang J, Zhang M, Chen M, Zhou Y, Zhu M. Oxygen Vacancies in Piezoelectric ZnO Twin-Mesocrystal to Improve Peroxymonosulfate Utilization Efficiency via Piezo-Activation for Antibiotic Ornidazole Removal. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209885. [PMID: 36644889 DOI: 10.1002/adma.202209885] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 01/06/2023] [Indexed: 06/17/2023]
Abstract
Piezoelectric mesocrystals as defective materials have been demonstrated to possess adsorptive and catalytic properties in redox reactions. However, there is still a lack of research on the quantitative relationship between the defect concentration and the piezocatalytic performance in piezoelectric mesocrystals. Herein, twin-hierarchical structure ZnO piezoelectric mesocrystals are taken with different oxygen-vacancies (OVs) concentrations to quantitatively investigate the effect of defect content on the peroxymonosulfate (PMS) piezo-activation in water purification. The ZnO piezoelectric mesocrystal with moderate OVs concentration exhibits a rapid antibiotic ornidazole (ORZ) pollutants degradation rate (0.034 min-1 ) and achieves a high PMS utilization efficiency (0.162) that exceeds the most state-of-the-art catalytic processes, while excessive OVs suppressed the piezocatalytic performance. Through calculations of electron property and reactants affinity, a quantitative relationship between OVs concentration and piezocatalytic properties is established. The ZnO mesocrystal with moderate OVs concentration realized increased electron delocalization, reduced charge transfer barrier, and enhanced reactants affinity, thus accelerating the kinetics of PMS activation. This work provides theoretical guidance for the application of defect engineering in mesocrystal to realize enhanced piezocatalytic performance.
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Affiliation(s)
- Jingling Yang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, P. R. China
| | - Minxian Zhang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, P. R. China
| | - Mengshan Chen
- National Engineering Research Center for Marine Aquaculture, Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316004, P. R. China
| | - Yingtang Zhou
- National Engineering Research Center for Marine Aquaculture, Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316004, P. R. China
| | - Mingshan Zhu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, P. R. China
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Yang X, Sun S, Ye L, Yun D, Liu C, Guo Y, Yang B, Yang M, Yang Q, Liang S, Cui J. One-pot integration of S-doped BiOCl and ZnO into type-II photocatalysts: Simultaneously boosting bulk and surface charge separation for enhanced antibiotic removal. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121725] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Zhang R, Du X, Li S, Guan J, Fang Y, Li X, Dai Y, Zhang M. Application of heteroatom doping strategy in electrolyzed water catalytic materials. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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