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Karmakar A, Das T, Karthick K, Kumaravel S, Selvasundarasekar SS, Madhu R, Chakraborty S, Kundu S. Tuning the Electronic Structure of a Ni-Vacancy-Enriched AuNi Spherical Nanoalloy via Electrochemical Etching for Water Oxidation Studies in Alkaline and Neutral Media. Inorg Chem 2022; 61:8570-8584. [PMID: 35613470 DOI: 10.1021/acs.inorgchem.2c01072] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Internal Ni-vacancy-enriched spherical AuNi nanoalloys (AuNi1-2-T) have been prepared via a noble electrochemical etching method. AuNi1.5-T showed the highest oxygen evolution reaction (OER) activity compared to bare AuNi1.5, and it demands only 239 mV overpotential, which was 134 mV lesser than the overpotential required by commercial RuO2 at 10 mA cm-2 current density in a 1 M KOH solution (pH = 14). The calculated turnover frequency (TOF) value for AuNi1.5-T (0.0229 s-1) was 11.74 times higher than that of AuNi1.5 (0.00195 s-1). Also, the electrochemically activated AuNi1.5-T showed superior neutral water oxidation activity by demanding only 335 mV overpotential with a TOF value of 0.000135 s-1 in a 1 M Na2SO4 solution (pH = 7) at 10 mA cm-2. The long-term stability studies (over 60 h) reveal the excellent robustness of an electrochemically treated alloy system. Density functional theory based electronic structure calculations showed that in the case of AuNi and AuNi1.5, Au d, Au s, and Ni d orbitals have significant contributions, whereas in the Ni-vacant systems, the density of states is mainly governed by d orbitals of Au and Ni. Also, the Ni-vacant system possesses a work function value of 4.96 eV, which is lower than that of the pristine system (5.27 eV) and thereby favored OH- binding with an optimum adsorption energy. This result is in reasonable agreement with the experimental outcome of an accelerated OER in a vacancy-enriched Ni-rich AuNi alloy system. Also, mechanistic analysis reveals that the creation of a Ni vacancy can effectively alter the overall mechanism of the OER and thereby facilitate the same with a lower applied energy.
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Affiliation(s)
- Arun Karmakar
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Electrochemical Process Engineering Division, Council of Scientific and Industrial Research, Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Tisita Das
- Materials Theory for Energy Scavenging Laboratory, Harish-Chandra Research Institute Allahabad, HBNI, Chhatnag Road, Jhunsi, Prayagraj, Allahabad 211009, India
| | - Kannimuthu Karthick
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Electrochemical Process Engineering Division, Council of Scientific and Industrial Research, Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Sangeetha Kumaravel
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Electrochemical Process Engineering Division, Council of Scientific and Industrial Research, Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Sam Sankar Selvasundarasekar
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Electrochemical Process Engineering Division, Council of Scientific and Industrial Research, Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Ragunath Madhu
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Electrochemical Process Engineering Division, Council of Scientific and Industrial Research, Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Sudip Chakraborty
- Materials Theory for Energy Scavenging Laboratory, Harish-Chandra Research Institute Allahabad, HBNI, Chhatnag Road, Jhunsi, Prayagraj, Allahabad 211009, India
| | - Subrata Kundu
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Electrochemical Process Engineering Division, Council of Scientific and Industrial Research, Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, Tamil Nadu 630003, India
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2
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Silva Olaya AR, Kühling F, Mahr C, Zandersons B, Rosenauer A, Weissmüller J, Wittstock G. Promoting Effect of the Residual Silver on the Electrocatalytic Oxidation of Methanol and Its Intermediates on Nanoporous Gold. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05160] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alex Ricardo Silva Olaya
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
| | - Franziska Kühling
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
| | - Christoph Mahr
- Institute for Solid State Physics, University of Bremen, 28359 Bremen, Germany
- MAPEX Center for Materials and Processes, University of Bremen, 28359 Bremen, Germany
| | - Birthe Zandersons
- Institute of Materials Physics and Technology, Hamburg University of Technology, 21073 Hamburg, Germany
| | - Andreas Rosenauer
- Institute for Solid State Physics, University of Bremen, 28359 Bremen, Germany
- MAPEX Center for Materials and Processes, University of Bremen, 28359 Bremen, Germany
| | - Jörg Weissmüller
- Institute of Materials Physics and Technology, Hamburg University of Technology, 21073 Hamburg, Germany
- Helmholtz-Zentrum Hereon, Institute of Materials Mechanics, 21502 Geesthacht, Germany
| | - Gunther Wittstock
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
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3
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Silva Olaya AR, Zandersons B, Wittstock G. Effect of the residual silver and adsorbed lead anions towards the electrocatalytic methanol oxidation on nanoporous gold in alkaline media. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Pei Y, Hu M, Tang X, Huang W, Li Z, Chen S, Xia Y. Ultrafast one-pot anodic preparation of Co 3O 4/nanoporous gold composite electrode as an efficient nonenzymatic amperometric sensor for glucose and hydrogen peroxide. Anal Chim Acta 2019; 1059:49-58. [PMID: 30876632 DOI: 10.1016/j.aca.2019.01.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 01/15/2019] [Accepted: 01/31/2019] [Indexed: 02/02/2023]
Abstract
For fabrication of composite electrode, one-pot strategy is highly attractive for convenience and efficiency. Here, a self-supporting Co3O4/nanoporous gold (NPG) composite electrode was one-pot prepared via one-step in situ anodization of a smooth gold electrode in a CoCl2 solution within 100 s. It worked as a bifunctional electrocatalyst for glucose oxidation and H2O2 reduction in NaOH solution. Under optimized conditions, the electrocatalytic oxidation of glucose exhibits a wide linear range from 2 μM to 2.11 mM with a limit of detection as low as 0.085 μM (S/N = 3) and an ultrahigh sensitivity of 4470.4 μA mM-1 cm-2. Detection of glucose in human serum samples are also realized with results comparable to those from local hospital. The electrocatalytic reduction of H2O2 shows a linear response range from 20 μM to 19.1 mM and a high sensitivity of 1338.7 μA mM-1 cm-2. The present results demonstrate that the facilely prepared Co3O4/NPG is a promising nonenzymatic sensor for rapid amperometric detection of glucose and H2O2 with ultrasensitivity, high selectivity, satisfactory reproducibility, good stability and long duration.
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Affiliation(s)
- Yuanjiao Pei
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, 410081, China
| | - Ming Hu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, 410081, China
| | - Xueyong Tang
- The Second Affiliated Hospital of Hunan University of TCM, Changsha, 410005, China
| | - Wei Huang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, 410081, China
| | - Zelin Li
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, 410081, China
| | - Shu Chen
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule of Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
| | - Yue Xia
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, 410081, China.
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Chen ZW, Chen LX, Wen Z, Jiang Q. Understanding electro-catalysis by using density functional theory. Phys Chem Chem Phys 2019; 21:23782-23802. [DOI: 10.1039/c9cp04430b] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
DFT calculations are indispensable for understanding the electro-catalysis through explanation of the experimental phenomena, prediction of experimental results, and guiding of the experimental investigation.
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Affiliation(s)
- Z. W. Chen
- Key Laboratory of Automobile Materials
- Ministry of Education, and School of Materials Science and Engineering
- Jilin University
- Changchun 130022
- China
| | - L. X. Chen
- Key Laboratory of Automobile Materials
- Ministry of Education, and School of Materials Science and Engineering
- Jilin University
- Changchun 130022
- China
| | - Z. Wen
- Key Laboratory of Automobile Materials
- Ministry of Education, and School of Materials Science and Engineering
- Jilin University
- Changchun 130022
- China
| | - Q. Jiang
- Key Laboratory of Automobile Materials
- Ministry of Education, and School of Materials Science and Engineering
- Jilin University
- Changchun 130022
- China
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Rinaldi AL, Rodríguez-Castellón E, Sobral S, Carballo R. Application of a nickel hydroxide gold nanoparticles screen-printed electrode for impedimetric sensing of glucose in artificial saliva. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.11.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Pei Y, Hu M, Tu F, Tang X, Huang W, Chen S, Li Z, Xia Y. Ultra-rapid fabrication of highly surface-roughened nanoporous gold film from AuSn alloy with improved performance for nonenzymatic glucose sensing. Biosens Bioelectron 2018; 117:758-765. [PMID: 30029197 DOI: 10.1016/j.bios.2018.07.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 07/04/2018] [Accepted: 07/10/2018] [Indexed: 10/28/2022]
Abstract
Using one-step anodization strategy, a nanoporous gold film (HNPG) with large surface area was rapidly fabricated on Au80Sn20 (wt%) alloy in just 80 s. The formation of highly surface-roughened nanoporous structures results from a complex process of electrochemical dealloying of Sn component from AuSn alloy, anodic electrodissolution, disproportion and deposition of Au component, and spontaneous redox reaction between electrodissolved Sn2+ and AuCl4-species at the applied anodic potential. As-prepared HNPG/AuSn shows enhanced electrochemical performance for glucose oxidation in alkaline electrolyte. At a low potential of 0.1 V (vs. SCE), it offers a short response time of 4 s, a wide linear detection range of 2 μM to 8.11 mM, an ultralow detection limit of 0.36 μM (S/N = 3), an ultrahigh sensitivity of 4374.6 μA cm-2 mM-1, and satisfactory selectivity and reproducibility. Specifically, after 6 weeks, no obvious loss of glucose amperometric signal was observed on HNPG/AuSn. The facile preparation and excellent sensing performance of HNPG/AuSn electrode make sure that it is a promising candidate for advanced enzyme-free glucose sensors.
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Affiliation(s)
- Yuanjiao Pei
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha 410081, China
| | - Ming Hu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha 410081, China
| | - Feihui Tu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha 410081, China
| | - Xueyong Tang
- The Second Affiliated Hospital of Hunan University of TCM, Changsha 410005, China
| | - Wei Huang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha 410081, China
| | - Shu Chen
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule of Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Zelin Li
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha 410081, China
| | - Yue Xia
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Engineering Laboratory for Petrochemicals and Materials, Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha 410081, China.
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8
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Recent advances in electrochemical non-enzymatic glucose sensors - A review. Anal Chim Acta 2018; 1033:1-34. [PMID: 30172314 DOI: 10.1016/j.aca.2018.05.051] [Citation(s) in RCA: 326] [Impact Index Per Article: 54.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 04/23/2018] [Accepted: 05/18/2018] [Indexed: 12/13/2022]
Abstract
This review encompasses the mechanisms of electrochemical glucose detection and recent advances in non-enzymatic glucose sensors based on a variety of materials ranging from platinum, gold, metal alloys/adatom, non-precious transition metal/metal oxides to glucose-specific organic materials. It shows that the discovery of new materials based on unique nanostructures have not only provided the detailed insight into non-enzymatic glucose oxidation, but also demonstrated the possibility of direct detection in whole blood or interstitial fluids. We critically evaluate various aspects of non-enzymatic electrochemical glucose sensors in terms of significance as well as performance. Beyond laboratory tests, the prospect of commercialization of non-enzymatic glucose sensors is discussed.
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Wang Z, Fei P, Xiong H, Qin C, Zhao W, Liu X. CoFe2O4 nanoplates synthesized by dealloying method as high performance Li-ion battery anodes. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.189] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Yi X, Wu Y, Tan G, Yu P, Zhou L, Zhou Z, Chen J, Wang Z, Pang J, Ning C. Palladium nanoparticles entrapped in a self-supporting nanoporous gold wire as sensitive dopamine biosensor. Sci Rep 2017; 7:7941. [PMID: 28801614 PMCID: PMC5554298 DOI: 10.1038/s41598-017-07909-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/04/2017] [Indexed: 12/13/2022] Open
Abstract
Traced dopamine (DA) detection is critical for the early diagnosis and prevention of some diseases such as Parkinson's, Alzheimer and schizophrenia. In this research, a novel self-supporting three dimensional (3D) bicontinuous nanoporous electrochemical biosensor was developed for the detection of dopamine by Differential Pulse Voltammetry (DPV). This biosensor was fabricated by electrodepositing palladium nanoparticles (Pd) onto self-supporting nanoporous gold (NPG) wire. Because of the synergistic effects of the excellent catalytic activity of Pd and novel structure of NPG wire, the palladium nanoparticles decorated NPG (Pd/NPG) biosensor possess tremendous superiority in the detection of DA. The Pd/NPG wire biosensor exhibited high sensitivity of 1.19 μA μΜ-1, broad detection range of 1-220 μM and low detection limit up to 1 μM. Besides, the proposed dopamine biosensor possessed good stability, reproducibility, reusability and selectivity. The response currents of detection in the fetal bovine serum were also close to the standard solutions. Therefore the Pd/NPG wire biosensor is promising to been used in clinic.
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Affiliation(s)
- Xin Yi
- School of Medicine, South China University of Technology, Guangzhou, China
- Guangdong Key Laboratory of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Yuxuan Wu
- Department of Electronic Communication & Software Engineering, Nanfang College of Sun Yat-sen University, Guangzhou, China
| | - Guoxin Tan
- Institute of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Peng Yu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.
- Guangdong Key Laboratory of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, 510006, China.
| | - Lei Zhou
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
- Guangdong Key Laboratory of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Zhengnan Zhou
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
- Guangdong Key Laboratory of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Junqi Chen
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
- Guangdong Key Laboratory of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Zhengao Wang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
- Guangdong Key Laboratory of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Jinshan Pang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
- Guangdong Key Laboratory of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Chengyun Ning
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.
- Guangdong Key Laboratory of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, 510006, China.
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11
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Liu Z, Huang Z, Cheng F, Guo Z, Wang G, Chen X, Wang Z. Efficient Dual-Site Carbon Monoxide Electro-Catalysts via Interfacial Nano-Engineering. Sci Rep 2016; 6:33127. [PMID: 27650532 PMCID: PMC5030650 DOI: 10.1038/srep33127] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 08/19/2016] [Indexed: 11/09/2022] Open
Abstract
Durable, highly efficient, and economic sound electrocatalysts for CO electrooxidation (COE) are the emerging key for wide variety of energy solutions, especially fuel cells and rechargeable metal-air batteries. Herein, we report the novel system of nickel-aluminum double layered hydroxide (NiAl-LDH) nanoplates on carbon nanotubes (CNTs) network. The formulation of such complexes system was to be induced through the assistance of gold nanoparticles in order to form dual-metal active sites so as to create a extended Au/NiO two phase zone. Bis (trifluoromethylsulfonyl)imide (NTf2) anion of ionic liquid electrolyte was selected to enhance the CO/O2 adsorption and to facilitate electro-catalyzed oxidation of Ni (OH)2 to NiOOH by increasing the electrophilicity of catalytic interface. The resulting neutral catalytic system exhibited ultra-high electrocatalytic activity and stability for CO electrooxidation than commercial and other reported precious metal catalysts. The turnover frequency (TOF) of the LDH-Au/CNTs COE catalyst was much higher than the previous reported other similar electrocatalysts, even close to the activity of solid-gas chemical catalysts at high temperature. Moreover, in the long-term durability testing, the negligible variation of current density remains exsisting after 1000 electrochemistry cycles.
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Affiliation(s)
- Zhen Liu
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125, USA
- Department of Physics & Engineering, Frostburg State University, Frostburg, MD 21532-2303, USA
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA
| | - Zhongyuan Huang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Feifei Cheng
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
| | - Guangdi Wang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Xu Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhe Wang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125, USA
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Xu C, Cao Y, Chen Y, Huang W, Chen D, Huang Q, Tu J. Fast Synthesis of Hierarchical Co(OH)2 Nanosheet Hollow Spheres with Enhanced Glucose Sensing. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600298] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chufeng Xu
- Key Laboratory of Tropical Biological Resources of Ministry of Education; College of Materials and Chemical Engineering; Hainan University; China
| | - Yang Cao
- Key Laboratory of Tropical Biological Resources of Ministry of Education; College of Materials and Chemical Engineering; Hainan University; China
| | - Yong Chen
- Key Laboratory of Tropical Biological Resources of Ministry of Education; College of Materials and Chemical Engineering; Hainan University; China
| | - Wei Huang
- Key Laboratory of Tropical Biological Resources of Ministry of Education; College of Materials and Chemical Engineering; Hainan University; China
| | - Delun Chen
- Key Laboratory of Tropical Biological Resources of Ministry of Education; College of Materials and Chemical Engineering; Hainan University; China
| | - Qingyou Huang
- Key Laboratory of Tropical Biological Resources of Ministry of Education; College of Materials and Chemical Engineering; Hainan University; China
| | - Jinchun Tu
- Key Laboratory of Tropical Biological Resources of Ministry of Education; College of Materials and Chemical Engineering; Hainan University; China
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Falahati H, Kim E, Barz DPJ. Fabrication and Characterization of Thin Film Nickel Hydroxide Electrodes for Micropower Applications. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12797-12808. [PMID: 26000783 DOI: 10.1021/acsami.5b01962] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The utilization of micropower sources is attractive in portable microfluidic devices where only low-power densities and energy contents are required. In this work, we report on the microfabrication of patterned α-Ni(OH)2 films on glass substrates which can be used for rechargeable microbatteries as well as for microcapacitors. A multilayer deposition technique is developed based on e-beam evaporation, ultraviolet lithography, and electroplating/electrodeposition which creates thin-film electrodes that are patterned with arrays of micropillars. The morphology and the structure of the patterned electrode films are characterized by employing field emission scanning electron microscopy. The chemical (elemental) composition is investigated by using X-ray diffraction and X-ray photoelectron spectroscopy. Finally, cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge measurements are used to evaluate the electrochemical performance of the patterned thin film electrodes compared to patternless electrodes. We observe that patterning of the electrodes results in significantly improved stability and, thus, longer endurance while good electrochemical performance is maintained.
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Affiliation(s)
- Hamid Falahati
- Queen's-RMC Fuel Cell Research Centre, Kingston, Ontario K7L 5L9, Canada
| | - Edward Kim
- Queen's-RMC Fuel Cell Research Centre, Kingston, Ontario K7L 5L9, Canada
| | - Dominik P J Barz
- Queen's-RMC Fuel Cell Research Centre, Kingston, Ontario K7L 5L9, Canada
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