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Zhang S, Hu J, Li SFY, Lu H, Wang G, Lu C, Sarwar MT, Tang A, Yang H. Electrochemical sensing mechanism of ammonium ions over an Ag/TiO 2 composite electrode modified by hematite. Chem Commun (Camb) 2023; 59:2636-2639. [PMID: 36779275 DOI: 10.1039/d3cc00240c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Here, we demonstrate a new electrochemical sensing mechanism of ammonium ions (NH4+) involving a two-electron oxygen reduction reaction (ORR) and a hydrazine reaction. The NH4+ are electrooxidized to hydrazine by H2O2 derived from the ORR over a self-supporting Ag/TiO2 nanotube array composite electrode modified by hematite (Ag/Fe2O3/TNTs). The Ag/Fe2O3/TNT sensor exhibits a high sensitivity of 1876 µA mM-1 cm-2 with a detection limit of 0.18 µM under non-alkaline conditions, a short response time of 3 s, good reproducibility, and fine selectivity among various interferents, and is also successfully used in real water bodies to display high accuracy. Furthermore, this new mechanism has a certain universality in a range of Ag (main catalyst)/transition metal oxide (cocatalyst)/TNT sensing systems. This work offers a new design basis for the urgently needed electrochemical ammonia nitrogen sensors.
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Affiliation(s)
- Shilin Zhang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China. .,College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.,Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.,Department of Chemistry National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.,NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Jinqing Hu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Sam Fong Yau Li
- Department of Chemistry National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.,NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Hongxiu Lu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Gang Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Chang Lu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Muhammad Tariq Sarwar
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China. .,Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.,Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry, China University of Geosciences, Wuhan 430074, P. R. China
| | - Aidong Tang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China. .,College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.,Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.,Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry, China University of Geosciences, Wuhan 430074, P. R. China
| | - Huaming Yang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China. .,Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.,Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry, China University of Geosciences, Wuhan 430074, P. R. China
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2
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Valinton JAA, Chung MC, Chen CH. Laser-Accelerated Mass Transport in Oxygen Reduction Via a Graphene-Supported Silver-Iron Oxide Heterojunction. J Phys Chem Lett 2022; 13:4200-4206. [PMID: 35511593 DOI: 10.1021/acs.jpclett.2c00709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Mass-transport acceleration is essential toward enhanced electrocatalytic performance yet rarely recognized under irradiation, because light is usually reported to improve charge transfer. We studied laser-enhanced mass transport through the heterojunction between Ag and semiconductor Fe2O3 situated on graphene for oxygen reduction reaction. Because of the decreased mass-transport resistance by 59% under 405 nm laser irradiation, the current density can be enhanced by 180%, which is also supported by a theoretical calculation. This laser-enhanced mass transport was attributed to local photothermal heating and the near-field local enhancement. Easier desorption of OH- species occurring between the Fe and Ag centers under the laser accelerates the mass-transport centers.
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Affiliation(s)
| | - Min-Chuan Chung
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Chun-Hu Chen
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
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3
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Xu C, Chen H, Zhao W, Wang N, Liu T, Wu J, Sun S, Lin M. Plasmon-enhanced electrocatalytic hydrogen evolution based on tannic acid–platinum film functionalized gold nanoparticles. NEW J CHEM 2022. [DOI: 10.1039/d2nj03716e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A tannic acid–platinum self-assembled complex modified on gold nanocomposites exhibited plasmon-enhanced electrocatalytic hydrogen evolution reaction performance.
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Affiliation(s)
- Congcong Xu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Hanrui Chen
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Wei Zhao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Nan Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Tingwei Liu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Jiayi Wu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Shengjun Sun
- Shandong Provincial Key Laboratory of Oral Biomedicine, College of Stomatology, Shandong University, Jinan, 250021, China
| | - Meng Lin
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
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4
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Zhang N, Jiang R. Interfacial Engineering of Metal/Metal Oxide Heterojunctions toward Oxygen Reduction and Evolution Reactions. Chempluschem 2021; 86:1586-1601. [PMID: 34874104 DOI: 10.1002/cplu.202100466] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/24/2021] [Indexed: 11/09/2022]
Abstract
Oxygen reduction reactions (ORR) and oxygen evolution reactions (OER) are two very important electrochemical processes for renewable energy conversion and storage devices. Electrocatalysts are needed to accelerate their sluggish kinetics to improve energy conversion efficiencies. Hence, extensive efforts have been devoted to the development of OER and ORR electrocatalysts with high activity and stability as well as low cost. Among these developed electrocatalysts, metal/metal oxide heterostructures attract a great deal of research interest because their catalytic performances can be tuned by interface engineering. In this Review, the latest achievements in interface engineering of metal/metal oxides heterostructures toward ORR and OER are described. The effects of the metal/metal oxide interface on catalysis are first discussed. Then, the approaches for interface engineering are illustrated. The developments of interface engineering in OER and ORR catalysis as well as bifunctional electrocatalysis are further introduced. Lastly, a perspective for future development of interface engineering in metal/metal oxide for OER and ORR is discussed.
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Affiliation(s)
- Nan Zhang
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Ruibin Jiang
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
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5
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Petroski K, Almansour A, Grady J, Suib SL. Morphological Control of Silicon Carbide Deposited on Hi-Nicalon Type S Fiber Using Atmospheric Pressure Chemical Vapor Infiltration. ACS OMEGA 2020; 5:24811-24817. [PMID: 33015499 PMCID: PMC7528288 DOI: 10.1021/acsomega.0c03493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 09/01/2020] [Indexed: 06/11/2023]
Abstract
Silicon carbide coated onto Hi-Nicalon Type S fiber is of great interest to the aerospace industry. This work focuses on tuning the reaction parameters of atmospheric pressure SiC CVI using CH3SiCl3 to control the morphology of the coatings produced. Depth of CH3SiCl3 from 1 to 14 cm, temperature from 1000 to 1100 °C, and flow rate of H2 carrier gas from 5 to 30 SCCM were examined. Coating morphologies ranged from smooth to very nodular, where spherical growths were present along the entire deposition zone. The parameters that yielded a smooth deposition throughout the 20 cm deposition zone were 4-6 cm of CH3SiCl3(l) depth, 1100 °C, and 10 SCCM of H2 as a carrier gas. Tensile testing using acoustic emission sensors was performed on SiCf/BN/CVI-SiC minicomposites with different coating morphologies. The tensile tests revealed that smooth coatings have better mechanical performance than the nodular coatings; nodular coatings promote premature ultimate brittle failure, while smooth coatings exhibit toughening mechanisms. Smooth coatings had higher average matrix cracking strength (248 MPa) and ultimate tensile strength (541 MPa) than average nodular coating matrix cracking strength (147 MPa) and ultimate strength (226 MPa).
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Affiliation(s)
- Kenneth Petroski
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Amjad Almansour
- NASA
Glenn Research Center, Cleveland, Ohio 44135, United States
| | - Joseph Grady
- NASA
Glenn Research Center, Cleveland, Ohio 44135, United States
| | - Steven L. Suib
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
- Institute
of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United States
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Dong J, Sun T, Li S, Shan N, Chen J, Yan Y, Xu L. 3D ordered macro-/mesoporous carbon supported Ag nanoparticles for efficient electrocatalytic oxygen reduction reaction. J Colloid Interface Sci 2019; 554:177-182. [PMID: 31299545 DOI: 10.1016/j.jcis.2019.06.087] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/23/2019] [Accepted: 06/25/2019] [Indexed: 01/13/2023]
Abstract
Three-dimensionally ordered macro-/mesoporous carbon (OMMC)-supported Ag nanoparticles (Ag/OMMC) with homogeneously dispersed Ag particles are prepared and investigated as effective electrocatalysts for oxygen reduction reaction (ORR) in alkaline aqueous system. The obtained Ag/OMMC catalyst displays smaller Ag particle size, higher Ag dispersion, and enhanced catalytic activity and durability compared with the carbon black Vulcan XC-72R supported Ag (Ag/XC-72R). The sizes of Ag particles supported on the OMMC and XC-72R are 4.3 and 6.5 nm, respectively. The prepared Ag/OMMC catalyst shows a positive half-wave potential of 0.79 V vs. RHE and a large diffusion-limited current of 5.6 mA cm-2 at 0.4 V, superior to Ag/XC-72R catalyst. The better ORR performance of the Ag/OMMC is probably ascribed to the unique 3D ordered interconnected macro-/mesoporous structure, which contributes to facilitating the mass/charge transport, improving the Ag particle dispersion, and preventing the Ag particle growth and aggregation.
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Affiliation(s)
- Jing Dong
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Tingting Sun
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Shengyu Li
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Nannan Shan
- Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA
| | - Jianfeng Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yushan Yan
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
| | - Lianbin Xu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
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7
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Peng M, Zhao Y, Chen D, Tan Y. Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide. ChemCatChem 2019. [DOI: 10.1002/cctc.201900913] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Ming Peng
- College of Materials Science and EngineeringHunan University Changsha Hunan 410082 P. R. China
| | - Yang Zhao
- College of Materials Science and EngineeringHunan University Changsha Hunan 410082 P. R. China
| | - Dechao Chen
- College of Materials Science and EngineeringHunan University Changsha Hunan 410082 P. R. China
| | - Yongwen Tan
- College of Materials Science and EngineeringHunan University Changsha Hunan 410082 P. R. China
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8
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Yeh CN, Huang H, Lim ATO, Jhang RH, Chen CH, Huang J. Binder-free graphene oxide doughs. Nat Commun 2019; 10:422. [PMID: 30679461 PMCID: PMC6345773 DOI: 10.1038/s41467-019-08389-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 01/07/2019] [Indexed: 11/16/2022] Open
Abstract
Graphene oxide (GO) sheets have been used to construct various bulk forms of GO and graphene-based materials through solution-based processing techniques. Here, we report a highly cohesive dough state of GO with tens of weight percent loading in water without binder-like additives. The dough state can be diluted to obtain gels or dispersions, and dried to yield hard solids. It can be kneaded without leaving stains, readily reshaped, connected, and further processed to make bulk GO and graphene materials of arbitrary form factors and tunable microstructures. The doughs can be transformed to dense glassy solids of GO or graphene without long-range stacking order of the sheets, which exhibit isotropic and much enhanced mechanical properties due to hindered sliding between the sheets. GO dough is also found to be a good support material for electrocatalysts as it helps to form compliant interface to access the active particles. Graphene oxide (GO) dispersions may be used as starting materials for graphene-based architectures. Here, a malleable and versatile dough state of GO is discovered, completing the GO–water continuum, which can be diluted or converted to glassy GO or graphene solids without long-range stacking order with enhanced mechanical and electrochemical properties
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Affiliation(s)
- Che-Ning Yeh
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Haiyue Huang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Alane Tarianna O Lim
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Ren-Huai Jhang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.,Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Chun-Hu Chen
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA. .,Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan.
| | - Jiaxing Huang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.
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9
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Li S, Ma Y, Liu Y, Xin G, Wang M, Zhang Z, Liu Z. Electrochemical sensor based on a three dimensional nanostructured MoS2 nanosphere-PANI/reduced graphene oxide composite for simultaneous detection of ascorbic acid, dopamine, and uric acid. RSC Adv 2019; 9:2997-3003. [PMID: 35518947 PMCID: PMC9060248 DOI: 10.1039/c8ra09511f] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 01/15/2019] [Indexed: 11/21/2022] Open
Abstract
A three dimensional (3D) nanostructured composite based on the self-assembly of MoS2 nanospheres and polyaniline (PANI) loaded on reduced graphene oxide (denoted by 3D MoS2-PANI/rGO) was prepared via a feasible one-pot hydrothermal process. The 3D MoS2-PANI/rGO nanocomposite not only exhibits good functionality and bioaffinity but also displays high electrochemical catalytic activity. As such, the developed 3D MoS2-PANI/rGO nanocomposite can be employed as the sensing platform for simultaneously detecting small biomolecules, i.e., ascorbic acid (AA), dopamine (DA), and uric acid (UA). The peak currents obtained from the differential pulse voltammetry (DPV) measurements depended linearly on the concentrations in the wide range from 50 μM to 8.0 mM, 5.0 to 500 μM, and 1.0 to 500 μM, giving low detection limits of 22.20, 0.70, and 0.36 μM for AA, DA, and UA, respectively. Furthermore, the 3D MoS2-PANI/rGO-based electrochemical sensor also exhibited high selectivity, good reproducibility and stability toward small molecule detection. The present sensing strategy based on 3D MoS2-PANI/rGO suggests a good reliability in the trace determination of electroactive biomolecules. A three dimensional (3D) nanostructured composite based on the self-assembly of MoS2 nanospheres and polyaniline (PANI) loaded on reduced graphene oxide (denoted by 3D MoS2-PANI/rGO) was prepared via a feasible one-pot hydrothermal process.![]()
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Affiliation(s)
- Shuaihui Li
- School of Chemical Engineering and Energy
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Yashen Ma
- Henan Provincial Key Laboratory of Surface & Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Yongkang Liu
- Henan Provincial Key Laboratory of Surface & Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Gu Xin
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Minghua Wang
- Henan Provincial Key Laboratory of Surface & Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Zhihong Zhang
- Henan Provincial Key Laboratory of Surface & Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Zhongyi Liu
- School of Chemical Engineering and Energy
- Zhengzhou University
- Zhengzhou 450001
- China
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