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Chand R, Karmakar A, Kundu S, Neogi S. Heterobimetallic Synergism in Triple-Redox 2D Framework for Largely Boosted Water Oxidation and Flanked Carboxylic-Acid-Triggered Unconventional Tandem Catalysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2404085. [PMID: 39032141 DOI: 10.1002/smll.202404085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 07/01/2024] [Indexed: 07/22/2024]
Abstract
A fish-bone-shaped and thermochemically stable 2D metal-organic framework (MOF) with multimodal active center-decked pore-wall is devised. Redox-active [Co2(COO)4] node and thiazolo[5,4-d]thiazole functionalization benefit this mixed-ligand MOF exhibiting electrochemical water oxidation with 375 mV overpotential at 10 mA cm-2 current density and 78 mV per dec Tafel slope in alkaline medium. Pair of oppositely oriented carboxylic acids aids postmetalation with transition metal ions to engineer heterobimetallic materials. Notably, overpotential of Ni2+ grafted triple-redox composite reduces to 270 mV with twofold declined Tafel slope than the parent MOF, ranking among the best-reported values, and outperforming majority of related catalysts. Significantly, turnover frequency and charge transfer resistance display 35.5 and 1.4-fold upsurge, respectively, with much uplifted chronopotentiometric stability and increase active surface area owing to synergistic Co(II)-Ni(II) coupling. The simultaneous presence of ─COOH and nitrogen-rich moieties renders this hydrogen-bonded MOF as acid-base synergistic catalyst for recyclable deacetalization-Knoevenagel reaction with >99% product yield under solvent-free mild condition. Besides control experiments, unique role of ─COOH as hydrogen-bond donor site in substrate activation is validated from comparing the performances of molecular-shearing approach-derived structurally similar unfunctionalized MOF, and the heterobimetallic composite. To the best of tandem Knoevenagel condensation, larger-sized acetal exhibits poor yield of α,β-unsaturated dicyanides, and demonstrates pore-fitting-mediated size-selectivity.
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Affiliation(s)
- Rudra Chand
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Inorganic Materials & Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat, 364002, India
| | - Arun Karmakar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu, 630003, India
| | - Subrata Kundu
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu, 630003, India
| | - Subhadip Neogi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Inorganic Materials & Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat, 364002, India
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2
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Castellino M, Sacco A, Fontana M, Chiodoni A, Pirri CF, Garino N. The Effect of Sulfur and Nitrogen Doping on the Oxygen Reduction Performance of Graphene/Iron Oxide Electrocatalysts Prepared by Using Microwave-Assisted Synthesis. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:560. [PMID: 38607095 PMCID: PMC11013293 DOI: 10.3390/nano14070560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/13/2024]
Abstract
The synthesis of novel catalysts for the oxygen reduction reaction, by means of a fast one-pot microwave-assisted procedure, is reported herein and deeply explained. In particular, the important role of doping atoms, like sulfur and nitrogen, in Fe2O3-reduced graphene oxide nanocomposites is described to address the modification of catalytic performance. The presence of dopants is confirmed by X-ray Photoelectron Spectroscopy analysis, while the integration of iron oxide nanoparticles, by means of decoration of the graphene structure, is corroborated by electron microscopy, which also confirms that there is no damage to the graphene sheets induced by the synthesis procedure. The electrochemical characterizations put in evidence the synergistic catalysis effects of dopant atoms with Fe2O3 and, in particular, the importance of sulfur introduction into the graphene lattice. Catalytic performance of as-prepared materials toward oxygen reduction shows values close to the Pt/C reference material, commonly used for fuel cell and metal-air battery applications.
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Affiliation(s)
- Micaela Castellino
- Department of Applied Science and Technology—Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy; (C.F.P.); (N.G.)
| | - Adriano Sacco
- Center for Sustainable Future Technologies @Polito—Istituto Italiano di Tecnologia, Via Livorno 60, 10144 Torino, Italy; (A.S.); (A.C.)
| | - Marco Fontana
- Department of Applied Science and Technology—Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy; (C.F.P.); (N.G.)
- Center for Sustainable Future Technologies @Polito—Istituto Italiano di Tecnologia, Via Livorno 60, 10144 Torino, Italy; (A.S.); (A.C.)
| | - Angelica Chiodoni
- Center for Sustainable Future Technologies @Polito—Istituto Italiano di Tecnologia, Via Livorno 60, 10144 Torino, Italy; (A.S.); (A.C.)
| | - Candido Fabrizio Pirri
- Department of Applied Science and Technology—Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy; (C.F.P.); (N.G.)
- Center for Sustainable Future Technologies @Polito—Istituto Italiano di Tecnologia, Via Livorno 60, 10144 Torino, Italy; (A.S.); (A.C.)
| | - Nadia Garino
- Department of Applied Science and Technology—Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy; (C.F.P.); (N.G.)
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3
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Zhang H, Li Y, Zeng L, Pan Y. Atomic-Level Regulation of Cu-Based Electrocatalyst for Enhancing Oxygen Reduction Reaction: From Single Atoms to Polymetallic Active Sites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307384. [PMID: 37828642 DOI: 10.1002/smll.202307384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/02/2023] [Indexed: 10/14/2023]
Abstract
The slow kinetics of cathodic oxygen reduction reactions (ORR) in fuel cells and the high cost of commercial Pt-based catalysts limit their large-scale application. Cu-based single-atom catalysts (SACs) have received increasing attention as a promising ORR catalyst due to their high atom utilization, high thermodynamic activity, adjustable electronic structure, and low cost. Herein, the recent research progress of Cu-based catalysts is reviewed from single atom to polymetallic active sites for ORR. First, the design and synthesis method of Cu-based SACs are summarized. Then the atomic-level structure regulation strategy of Cu-based catalyst is proposed to improve the ORR performance. The different ORR catalytic mechanism based on the different Cu active sites is further revealed. Finally, the design principle of high-performance Cu-based SACs is proposed for ORR and the opportunities and challenges are further prospected.
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Affiliation(s)
- Hui Zhang
- State Key Lab of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Yichuan Li
- State Key Lab of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Lingyou Zeng
- State Key Lab of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Yuan Pan
- State Key Lab of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China
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Kumar MM, Aparna C, Nayak AK, Waghmare UV, Pradhan D, Raj CR. Surface Tailoring-Modulated Bifunctional Oxygen Electrocatalysis with CoP for Rechargeable Zn-Air Battery and Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2024; 16:3542-3551. [PMID: 38215005 DOI: 10.1021/acsami.3c17349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
The transition metal phosphide (TMP)-based functional electrocatalysts are very promising for the development of electrochemical energy conversion and storage devices including rechargeable metal-air batteries and water electrolyzer. Tuning the electrocatalytic activity of TMPs is one of the vital steps to achieve the desired performance of these energy devices. Herein, we demonstrate the modulation of the bifunctional oxygen electrocatalytic activity of nitrogen-doped carbon-encapsulated CoP (CoP@NC) nanostructures by surface tailoring with ultralow amount (0.56 atomic %) of Ru nanoparticles (2.5 nm). The CoP at the core and the Ru nanoparticles on the shell have a facile charge transfer interaction with the encapsulating NC. The strong coupling of Ru with CoP@NC boosts the electrocatalytic performance toward oxygen reduction (ORR), oxygen evolution (OER), and hydrogen evolution (HER) reactions. The surface-tailored catalyst requires only 35 mV to deliver the benchmark current density of 10 mA·cm-2 for HER. A small potential gap of 620 mV between ORR and OER is achieved, making the catalyst highly suitable for the development of rechargeable zinc-air batteries (ZABs). The homemade ZAB delivers a specific capacity of 780 mA·hgZn-1 and peak power density of 175 mW·cm-2 with a very small voltaic efficiency loss (1.1%) after 300 cycles. The two-electrode water splitting cell (CoP@NC-Ru||CoP@NC-Ru) delivers remarkably low cell voltage of 1.47 V at the benchmark current density. Stable current density of 25 mA·cm-2 for 25 h without any significant change is achieved. Theoretical studies support the charge transfer interaction-induced enhanced electrocatalytic activity of the surface-tailored nanostructure.
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Affiliation(s)
- Mopidevi Manikanta Kumar
- Functional Materials and Electrochemistry Lab Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - C Aparna
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, Karnataka 560064, India
| | - Amit Kumar Nayak
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Umesh V Waghmare
- Theoretical Sciences Unit and School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, Karnataka 560064, India
| | - Debabrata Pradhan
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - C Retna Raj
- Functional Materials and Electrochemistry Lab Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
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Shi Y, Qiu J, Xue Y, Ding X, Dai J, Sun X, Zhao M, Wang J, Chen Y. Catalysts for highly water-resistant catalytic decomposition of ozone: Hausmannite Mn 3O 4 on exposed (101) crystal surface. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131947. [PMID: 37406522 DOI: 10.1016/j.jhazmat.2023.131947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/09/2023] [Accepted: 06/25/2023] [Indexed: 07/07/2023]
Abstract
Recently, ozone pollution has gradually replaced PM2.5 as the main pollutant affecting air pollution. In this study, we synthesized a series of Mn3O4 catalysts by hydrothermal method changing the precursors and tested their activities at different relative humidity, gas volume space velocity of 150,000 h-1 and 5 ppm ozone. Remarkably, Mn3O4-SO4 prepared with MnSO4 as precursor showed excellent catalytic ozone decomposition activity, almost completely converting 5 ppm of ozone at different relative humidity ranges. Finally, the most active Mn3O4-SO4 catalyst was tested for its usability limit at RH= 90%, after 28 h of testing under high humidity conditions, it had retained successfully the complete decomposition of low concentrations of ozone. The catalysts were characterized by XRD, Raman, HRTEM, XPS, BET, H2O-TPD and in situ IR NH3 adsorption. The characterization analysis revealed that the Mn3O4-SO4 surface could exposed a highly active (101) crystalline surface with high specific surface area, excellent hydrophobicity as well as ozone adsorption capacity, which were highly favorable for ozone decomposition under high humidity conditions. In this work, Mn3O4 exhibits good catalytic activity, which provides an additional option for future studies of manganese oxides.
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Affiliation(s)
- Yashan Shi
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China
| | - Jing Qiu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China
| | - Ying Xue
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China
| | - Xinmei Ding
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China
| | - Jingyu Dai
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China
| | - Xiaolong Sun
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China
| | - Ming Zhao
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China; Center of Engineering of Vehicular Exhaust Gases Abatement, Chengdu 610064 Sichuan, China; Center of Engineering of Environmental Catalytic Material, Chengdu 610064 Sichuan, China.
| | - Jianli Wang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China; Center of Engineering of Vehicular Exhaust Gases Abatement, Chengdu 610064 Sichuan, China; Center of Engineering of Environmental Catalytic Material, Chengdu 610064 Sichuan, China.
| | - Yaoqiang Chen
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064 Sichuan, China; Center of Engineering of Vehicular Exhaust Gases Abatement, Chengdu 610064 Sichuan, China; Institute of New Energy and Low-Carbon Technology, Chengdu 610064 Sichuan, China
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Nagaraja P, Rao HS, Pamidi V, Umeshbabu E, Rao GR, Justin P. Mn 3O 4 nano-octahedrons embedded in nitrogen-doped graphene oxide as potent anode material for lithium-ion batteries. IONICS 2023; 29:1-12. [PMID: 37360247 PMCID: PMC10187504 DOI: 10.1007/s11581-023-05035-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 04/03/2023] [Accepted: 05/05/2023] [Indexed: 06/28/2023]
Abstract
Mn3O4 nano-octahedrons embedded in N-doped graphene oxide (MNGO) nanosheets were synthesized using a simple, energy-efficient, and rapid microwave-digested hydrothermal route in a single step. The structural and morphological aspects of synthesized materials were evaluated by XRD, IR, Raman, FE-SEM, and HR-TEM techniques. Then, the composite MNGO was tested for its Li-ion storage properties and compared with reduced graphene oxide (rGO) and Mn3O4 materials. The MNGO composite exhibited superior reversible specific capacity, excellent cyclic stability, and outstanding structural integrity throughout the electrochemical studies. The MNGO composite showed a reversible capacity of 898 mA h g-1 after 100 cycles at 100 mA g-1 and Coulombic efficiency of 97.8%. Even at a higher current density of 500 mA g-1, it exhibits a higher specific capacity of 532 mA h g-1 (~1.5 times higher than commercial graphite anode). These results demonstrate that Mn3O4 nano-octahedrons embedded on N-doped GO are a highly durable and potent anode material for LIBs. Supplementary Information The online version contains supplementary material available at 10.1007/s11581-023-05035-6.
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Affiliation(s)
- Pernapati Nagaraja
- Department of Chemistry and DST-Solar Energy Harnessing Centre, Indian Institute of Technology Madras, Chennai, 600036 India
- Department of Chemistry, Rajiv Gandhi University of Knowledge Technologies, RK Valley, Kadapa, Andhra Pradesh 516330 India
| | - H. Seshagiri Rao
- Department of Chemistry and DST-Solar Energy Harnessing Centre, Indian Institute of Technology Madras, Chennai, 600036 India
- Department of Chemistry, Rajiv Gandhi University of Knowledge Technologies, RK Valley, Kadapa, Andhra Pradesh 516330 India
| | - Venkat Pamidi
- Helmholtz Institute Ulm (HIU) Electrochemical Energy Storage, Helmholtzstraße 11, 89081 Ulm, Germany
| | - Ediga Umeshbabu
- Helmholtz Institute Ulm (HIU) Electrochemical Energy Storage, Helmholtzstraße 11, 89081 Ulm, Germany
| | - G. Ranga Rao
- Department of Chemistry and DST-Solar Energy Harnessing Centre, Indian Institute of Technology Madras, Chennai, 600036 India
| | - Ponniah Justin
- Department of Chemistry, Rajiv Gandhi University of Knowledge Technologies, RK Valley, Kadapa, Andhra Pradesh 516330 India
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7
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Singh M, Neogi S. Largely Entangled Diamondoid Framework with High-Density Urea and Divergent Metal Nodes for Selective Scavenging of CO 2 and Molecular Dimension-Mediated Size-Exclusive H-Bond Donor Catalysis. Inorg Chem 2023; 62:871-884. [PMID: 36580539 DOI: 10.1021/acs.inorgchem.2c03684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Pore environment modulation with high-density polarizing groups in metal-organic frameworks (MOFs) can effectively accomplish selective and multicyclic carbon dioxide (CO2) adsorption, whereas the incorporation of task-specific organic sites inside these porous vessels promise to evade self-quenching, solubility, and recyclability issues in hydrogen-bond donating (HBD) catalysis. However, concurrent amalgamation of both these attributes over a single platform is rare but extremely demanding in view of sustainable applications. We designed a robust diamondoid framework CSMCRI-17 (CSMCRI = Central Salt and Marine Chemicals Research Institute) from the mixed-ligand assembly of azo group-containing dicarboxylate ligand, urea-functionalized pyridyl linker, and Zn(II) nodes with specific divergent coordination. Seven-fold interpenetration to the microporous structure largely augments N-rich functionality that facilitates high CO2 uptake in the activated form (17a) with good CO2 selectivity over N2 and CH4 that outperform many reported materials. The framework displays very strong CO2 affinity and no reduction in adsorption capacity over multiple uptake-release cycles. Benefitting from the pore-wall decoration with urea functionality from the pillaring strut, 17a further demonstrates hydrogen-bond-mediated Friedel-Crafts alkylation of indole with β-nitrostyrene under mild conditions, with multicyclic usability and excellent reactivity toward wide ranges of substituted nucleophiles and electrophiles. Interestingly, interpenetration-generated optimum-sized pores induce poor conversion to sterically encumbered substrate via molecular dimension-mediated size selectivity that is alternatively ascribed from additional control experiments and support the occurrence of HBD reaction within the MOF cavity. The catalytic path is detailed in light of the change of emission intensity of the framework by the electrophile as well as the judicious choice of the substrate, which authenticates the prime role of urea moiety-governed two-point hydrogen bonding.
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Affiliation(s)
- Manpreet Singh
- Inorganic Materials & Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Subhadip Neogi
- Inorganic Materials & Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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8
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Bin Yousaf A, Hagarová I, Javaid Zaidi S, Kasak P. Single-phase Mn-Fe interfacial oxides nanocomposites encored on carbon nitride sheets exhibited enhanced performance for electrocatalytic oxygen reduction reactions. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Goswami R, Karthick K, Das S, Rajput S, Seal N, Pathak B, Kundu S, Neogi S. Brønsted Acid-Functionalized Ionic Co(II) Framework: A Tailored Vessel for Electrocatalytic Oxygen Evolution and Size-Exclusive Optical Speciation of Biothiols. ACS APPLIED MATERIALS & INTERFACES 2022; 14:29773-29787. [PMID: 35728309 DOI: 10.1021/acsami.2c05299] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Metal-organic frameworks (MOFs) not only combine globally demanded renewable energy generation and environmental remediation onto a single platform but also rationalize structure-performance synergies to devise smarter materials with remarkable performance. The robust and non-interpenetrated cationic MOF exemplifies a unique bifunctional scaffold for the efficient electrochemical oxygen evolution reaction (OER) and ultrasensitive monitoring of biohazards. The microporous framework containing Brønsted acid-functionalized [Co2(μ2-OH)(CO2)2] secondary building units (SBUs) exhibits remarkable OER performance in 1 M KOH, requiring 410 mV overpotential to obtain 10 mA cm-2 anodic current density, and a low Tafel slope of 55 mV/dec with 93.1% Faradaic efficiency. Apart from the high turnover frequency and electrochemically assessable surface area, steady OER performance over 500 cycles under potentiodynamic and potentiostatic conditions result in long-term catalyst durability. The highly emissive attribute from nitrogen-rich fluorescent struts benefits the MOF in recyclable and selective fluoro-detection of three biothiols (l-cysteine, homocysteine, and glutathione) in water with a fast response time. In addition to colorimetric monitoring in the solid and solution phases, control experiments validate size-exclusive biothiol speciation through molecular-dimension-mediated pore diffusion. The role of SBUs in the OER mechanism is detailed from density functional theory-derived free energy analysis, which also validates the importance of accessible N-sites in sensing via portraying framework-analyte supramolecular interactions.
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Affiliation(s)
- Ranadip Goswami
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- Inorganic Materials & Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India
| | - Kannimuthu Karthick
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Sandeep Das
- Discipline of Chemistry, Indian Institute of Technology (IIT) Indore, Indore, Madhya Pradesh 453552, India
| | - Sonal Rajput
- Inorganic Materials & Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India
| | - Nilanjan Seal
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- Inorganic Materials & Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India
| | - Biswarup Pathak
- Discipline of Chemistry, Indian Institute of Technology (IIT) Indore, Indore, Madhya Pradesh 453552, India
| | - Subrata Kundu
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu 630003, India
| | - Subhadip Neogi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- Inorganic Materials & Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India
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Lingamdinne LP, Godlaveeti SK, Angaru GKR, Chang YY, Nagireddy RR, Somala AR, Koduru JR. Highly efficient surface sequestration of Pb 2+ and Cr 3+ from water using a Mn 3O 4 anchored reduced graphene oxide: Selective removal of Pb 2+ from real water. CHEMOSPHERE 2022; 299:134457. [PMID: 35367227 DOI: 10.1016/j.chemosphere.2022.134457] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/16/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
Owing to the ubiquitous existence of detrimental heavy metals in the environment, simple adsorption-oriented approaches are becoming increasingly appealing for the effective removal of Pb2+ and Cr3+ from water bodies. These techniques use nanocomposites (NC) of reduced graphene oxide (rGO) and Mn3O4 (rGO-Mn3O4), they employ a hydrothermal technique featuring NaBH4 and NaOH solutions. Here, spectroscopic and microscopic instrumental techniques were used to evaluate the morphological and physicochemical characteristics of prepared reduced graphene oxide manganese oxide (rGO-Mn3O4), revealing that it possessed a well-defined porous structure with a specific surface area of 126 m2 g-1. The prepared rGO-Mn3O4 had significant adsorption efficiencies for Pb2+ and Cr3+, achieving maximum sequestration capacities of 130.28 and 138.51 mg g-1 for Pb2+ and Cr3+, respectively, according to the Langmuir model. These adsorption capacities are comparable to or greater than those of previously reported graphene-based materials. The Langmuir isotherm and pseudo-second-order models adequately represented the experimental results. Thermodynamic analysis revealed that adsorption occurred through spontaneous endothermic reactions. Recycling studies showed that the developed r-GO-Mn3O4 had excellent recyclability, with <70% removal at the 5th cycle; its feasibility was evaluated using industrial wastewater, suggesting that Pb2+ was selectively removed from Pb2+ and Cr3+ contaminated water. The instrumental analysis and surface phenomena studies presented here revealed that the adsorptive removal processes of both heavy metals involved π electron donor-acceptor interactions, ion exchange, and electrostatic interactions, along with surface complexation. Overall, the developed rGO-Mn3O4 has the potential to be a high-value adsorbent for removing heavy metals.
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Affiliation(s)
| | - Sreenivasa Kumar Godlaveeti
- Department of Materials Science & Nanotechnology, Yogi Vemana University, Kadapa, 516005, Andhra Pradesh, India
| | | | - Yoon-Young Chang
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea
| | - Ramamanohar Reddy Nagireddy
- Department of Materials Science & Nanotechnology, Yogi Vemana University, Kadapa, 516005, Andhra Pradesh, India
| | - Adinarayana Reddy Somala
- Department of Materials Science & Nanotechnology, Yogi Vemana University, Kadapa, 516005, Andhra Pradesh, India.
| | - Janardhan Reddy Koduru
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea.
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11
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Dosaev K, Istomin S, Strebkov D, Tsirlina G, Antipov E, Savinova E. AMn2O4 Spinels (A - Li, Mg, Mn, Cd) as ORR catalysts: the role of Mn coordination and oxidation state in the catalytic activity and their propensity to degradation. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Kochergin VK, Manzhos RA, Khodos II, Krivenko AG. One-step synthesis of nitrogen-doped few-layer graphene structures decorated with Mn1.5Co1.5O4 nanoparticles for highly efficient electrocatalysis of oxygen reduction reaction. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.07.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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13
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Manikanta Kumar M, Raj CR. Heteroatom-Doped Carbon-Encapsulated FeP Nanostructure: A Multifunctional Electrocatalyst for Zinc-Air Battery and Water Electrolyzer. ACS APPLIED MATERIALS & INTERFACES 2022; 14:15176-15186. [PMID: 35344334 DOI: 10.1021/acsami.1c24918] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The rational design and synthesis of efficient multifunctional electrocatalysts for renewable energy technologies is of significant interest. Herein, we demonstrate a novel approach for the synthesis of a nitrogen and phosphorus dual-doped mesoporous carbon-encapsulated iron phosphide (FeP@NPC) nanostructure and its multifunctional electrocatalytic activity toward an oxygen reduction reaction, oxygen evolution reaction, and hydrogen evolution reaction for zinc-air battery (ZAB) and alkaline water-splitting applications. FeP@NPC is obtained by the carbothermal reduction of the precursor complex [Fe(bpy)3](PF6)2 in the presence of melamine without any traditional phosphidating agent. The PF6- counteranion is used for the phosphidation of Fe. FeP@NPC obtained at 900 °C (FeP@NPC-900) exhibits excellent bifunctional oxygen electrocatalytic performance with a very low potential gap (ΔE = E1/2ORR - Ej10OER) of 670 mV. The ZAB device delivers a peak power density of 190.15 mW cm-2 (iR-corrected), specific capacity of 785 mA h gZn-1, and energy density of 706.5 Wh kgZn-1 at 50 mA cm-2. The ZAB exhibits excellent charge-discharge cycling stability for over 35 h with negligible voltaic efficiency loss (0.9%). Three CR2032 coin-cell-based ZABs made of an FeP@NPC-900 air cathode connected in series power 81 LEDs for 15 min. FeP@NPC-900 also has promising electrocatalytic activity toward water splitting in acidic as well as in alkaline pH. The benchmark current density of 10 mA cm-2 is achieved with a two-electrode alkaline water electrolyzer at a cell voltage of 1.65 V. ZAB-powered water electrolyzer is made by integrating two rechargeable ZABs connected in series with the two-electrode water electrolyzer. The ZAB powers the electrolyzer for 24 h without a significant loss in the open-circuit voltage. The catalyst retains its initial structural integrity even after continuous water electrolysis for 24 h.
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Affiliation(s)
- Mopidevi Manikanta Kumar
- Functional Materials and Electrochemistry Lab, Department of Chemistry, IIT Kharagpur, Kharagpur 721302, West Bengal, India
| | - C Retna Raj
- Functional Materials and Electrochemistry Lab, Department of Chemistry, IIT Kharagpur, Kharagpur 721302, West Bengal, India
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14
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Comparative study of various preparation methods of metal-free N and S Co-doped porous graphene as an ORR catalyst in alkaline solution. J CHEM SCI 2022. [DOI: 10.1007/s12039-021-02018-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Choi EY, Lee D, Kim J, Kim CK, Kang E. Enhanced electrocatalytic activity of N-doped nano-onion/gold nanorod nanocomposites for the oxygen reduction reaction. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Dai Z, Zhao L, Peng S, Yue Z, Zhan X, Wang J. Removal of oxytetracycline promoted by manganese-doped biochar based on density functional theory calculations: Comprehensive evaluation of the effect of transition metal doping. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150268. [PMID: 34571226 DOI: 10.1016/j.scitotenv.2021.150268] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/07/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
The regulation of surface electrons by non-metal doping of biochar (BC) is environmentally and ecologically significant. However, systematic studies on the regulation of surface electrons by transition metal doping are lacking. The present study is based on the observation that the removal efficiency of oxytetracycline (OTC) by Mn-doped BC is eight times higher than that of undoped BC in 20 min. The effects of Mn doping on the crystal phase formation, persistent free radicals (PFRs), electron density, molecular orbitals, and nucleophilic active sites of BC are investigated, and the intermediate products of OTC are evaluated. Mn doping enhances the signal for sp2-hybridised carbon-carbon double bond, forms more delocalised π-bonds, and promotes the formation of free radicals centred on the carbon atoms. The specific surface area of BC increases, and manganese oxide is formed on the its surface. Density functional theory calculations show that Mn doping accelerates the electron transfer of BC, provides additional electrons for the BC system, and makes this system more ionised. OTC molecules preferentially attack the nucleophilic reaction sites near Mn atoms based on molecular electrostatic potential measurements. Therefore, this study provides new insights into the surface electronic structures regulated by transition metal elements.
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Affiliation(s)
- Zhipeng Dai
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230000, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Lu Zhao
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230000, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Shuchuan Peng
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230000, China.
| | - Zhengbo Yue
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230000, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Xinyuan Zhan
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230000, China
| | - Jin Wang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230000, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui 230009, China
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Das KS, Saha S, Pal B, Adhikary A, Moorthy S, Bala S, Akhtar S, Ghose PK, Singh SK, Ray PP, Mondal R. A Nd6 molecular butterfly: a unique all-in-one material for SMM, MCE and maiden photosensitized opto-electronic device fabrication. Dalton Trans 2022; 51:1617-1633. [PMID: 34994757 DOI: 10.1039/d1dt02364k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Besides iron, ironically neodymium (Nd) is the most ubiquitously used metal for magnetic purposes, even among the lanthanides, when it comes to the field of molecular magnetism, yet it ranks among the least studied metals. However, strong apathy towards this magnetic lanthanide means that vital information will be missed, which is required for the advancement of the subject. Herein, we have successfully demonstrated the usefulness of a hexanuclear neodymium complex as a magnetic material, and also in electronic device fabrication. A {NdIII6} cage with an aesthetically pleasing butterfly topology was synthesized using a rather non-conventional N-rich pyridyl-pyrazolyl based ligand. The cage shows single molecule magnet (SMM) properties, with an effective energy barrier, Ueff, value of 3.4 K and relaxation time, τ0, of 3.1 × 10-4 s, originating from an unusual occurrence of metal centres with different coordination environments. Furthermore, magnetic studies reveal significant cyrogenic magnetic cooling, with a magnetic entropy change of 8.28 J kg-1 K-1 at 5 T and 3 K. To the best of our knowledge, the titular compound is the only example of a Nd-complex that exhibits concomitant magnetocaloric effect (MCE) and SMM properties. Complete active space self-consistent field (CASSCF) calculations were carried out to shed light on the origin of the magnetic anisotropy and magnetic relaxation of the compound. The same uniqueness is also true for the first electronic investigation carried out on the Nd complex. The maiden electronic device fabricated using the Nd complex shows an interesting intertwining of electronic and optical features, which contribute towards its improved photosensitized optoelectronic data.
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Affiliation(s)
- Krishna Sundar Das
- School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata-700032, West Bengal, India.
| | - Sayan Saha
- School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata-700032, West Bengal, India.
| | - Baishakhi Pal
- Department of Physics, Jadavpur University, Jadavpur, Kolkata 700 032, India
| | - Amit Adhikary
- School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata-700032, West Bengal, India.
| | - Shruti Moorthy
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy-502284, Telangana, India
| | - Sukhen Bala
- School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata-700032, West Bengal, India.
| | - Sohel Akhtar
- School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata-700032, West Bengal, India.
| | - Pradeepta Kumar Ghose
- School of Physical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata-700032, West Bengal, India
| | - Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy-502284, Telangana, India
| | - Partha Pratim Ray
- Department of Physics, Jadavpur University, Jadavpur, Kolkata 700 032, India
| | - Raju Mondal
- School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata-700032, West Bengal, India.
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Babu P, Kim H, Park JY, Naik B. Trioctylphosphine Oxide (TOPO)-Assisted Facile Fabrication of Phosphorus-Incorporated Nanostructured Carbon Nitride Toward Photoelectrochemical Water Splitting with Enhanced Activity. Inorg Chem 2022; 61:1368-1376. [PMID: 34990141 DOI: 10.1021/acs.inorgchem.1c02863] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Designing nanostructured arrays of two-dimensional surfaces and interfaces is a versatile approach to increasing their photoelectrochemical activity. Here, phosphorus (P)-incorporated nanostructured carbon nitride (h-PCN) with an enlarged surface area is fabricated by employing trioctylphosphine oxide (TOPO) as a dopant precursor for visible-light-driven photoelectrochemical water splitting to produce hydrogen. The structural, morphological, and electronic properties of the photocatalyst have been characterized through various physicochemical techniques. We show that the incorporation of P into the g-C3N4 framework enhances light absorption over broad regimes, charge separation, and migration, as well as the specific surface area, showing excellent photocurrent enhancement (5.4 folds) in the cathodic direction as compared to bulk g-C3N4. Moreover, the photocathode shows 3.3-fold enhancement in current at zero biased potential. Without using any cocatalyst, the photoelectrodes produced 27 μmol h-1 of H2 and 13 μmol h-1of O2 with 95% faradic efficiency. The excellent photoelectrochemical behavior toward water-splitting reactions by the photoelectrode is attributed to the synergistic effect of P incorporation and active sites emerging from the nanostructured architecture of the material. This work demonstrates the facile fabrication of nanostructured P-incorporated g-C3N4 toward water-splitting reactions to produce hydrogen without using a cocatalyst in a simple and cost-effective way.
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Affiliation(s)
- Pradeepta Babu
- Centre for Nanoscience and Nanotechnology, Siksha "O" Anusandhan, Bhubaneswar 751030, India
| | - Heeyoung Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea.,Center for Nanomterials and Chemical Reactions, Insitute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Jeong Young Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea.,Center for Nanomterials and Chemical Reactions, Insitute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Brundabana Naik
- Department of Chemistry, Siksha "O" Anusandhan, Bhubaneswar 751030, India
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Singh M, Neogi S. Urea-engineering mediated hydrogen-bond donating Friedel−Crafts alkylation of indoles and nitroalkenes in dual-functionalized and microporous metal-organic framework with high recyclability and pore-fitting-induced size-selectivity. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00206j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As an effective alternative to Lewis acid activation, hydrogen-bond donating (HBD) organo-catalysis denotes a powerful construction tool to important classes of carbon–carbon bonds, wherein metal-organic frameworks (MOFs) alleviate issues like...
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20
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Liu H, Xie W, Huang Z, Yao C, Han Y, Huang W. Recent Advances in Flexible Zn-Air Batteries: Materials for Electrodes and Electrolytes. SMALL METHODS 2022; 6:e2101116. [PMID: 35041275 DOI: 10.1002/smtd.202101116] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 10/16/2021] [Indexed: 06/14/2023]
Abstract
Flexible Zn-air batteries (ZABs) draw much attention due to the merits of high energy density, stability, and safety, and show potential applications for wearable devices. However, the development of flexible ZABs with great energy density, high round-trip efficiency, and long cycle life for practical applications is highly restricted by the lack of highly active oxygen catalysts, high ion-conducting solid-state electrolytes, appropriate Zn anodes, and advanced battery configuration. Promising oxygen catalysts should possess both, superior oxygen reduction reaction and oxygen evolution reaction performance and can be directly used as self-supporting cathodes without loading catalysts on support materials such as carbon cloth. In addition, electrolytes play an important role in ZABs; a good electrolyte should be in all-solid state with high ion conductivity. Moreover, for an excellent Zn anode, it is required to stably contact the electrolyte interface during the bending process. Therefore, in this review, recent advances in ZABs are summarized, including: i) the powder and 3D self-supporting oxygen catalysts, ii) the species of solid-state electrolytes, and iii) the rational design of Zn anodes. Finally, the challenges and opportunities of this promising field are presented.
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Affiliation(s)
- Haoran Liu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE), and Ningbo Institute of NPU, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Wen Xie
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE), and Ningbo Institute of NPU, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Zeyi Huang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE), and Ningbo Institute of NPU, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Chuanhao Yao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE), and Ningbo Institute of NPU, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Yunhu Han
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE), and Ningbo Institute of NPU, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE), and Ningbo Institute of NPU, Northwestern Polytechnical University, Xi'an, 710072, China
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21
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Makgopa K, Ratsoma MS, Raju K, Mabena LF, Modibane KD. One-Step Hydrothermal Synthesis of Nitrogen-Doped Reduced Graphene Oxide/Hausmannite Manganese Oxide for Symmetric and Asymmetric Pseudocapacitors. ACS OMEGA 2021; 6:31421-31434. [PMID: 34869969 PMCID: PMC8637592 DOI: 10.1021/acsomega.1c02302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
In this paper, the pseudocapacitive performance of nitrogen-doped and undoped reduced graphene oxide/tetragonal hausmannite nanohybrids (N-rGO/Mn3O4 and rGO/Mn3O4) synthesized using a one-pot hydrothermal method is reported. The nanohybrid electrode materials displayed exceptional electrochemical performance relative to their respective individual precursors (i.e., reduced graphene oxide (rGO), nitrogen-doped reduced graphene oxide (N-rGO), and tetragonal hausmannite (Mn3O4)) for symmetric pseudocapacitors. Among the two nanohybrids, N-rGO/Mn3O4 displayed greater performance with a high specific capacitance of 345 F g-1 at a current density of 0.1 A g-1, excellent specific energy of 12.0 Wh kg-1 (0.1 A g-1), and a high power density of 22.5 kW kg-1 (10.0 A g-1), while rGO/Mn3O4 demonstrated a high specific capacitance of 264 F g-1 (0.1 A g-1) with specific energy and power densities of 9.2 Wh kg-1 (0.1 A g-1) and 23.6 kW kg-1 (10.0 A g-1), respectively. Furthermore, the N-rGO/Mn3O4 nanohybrid exhibited an impressive pseudocapacitive performance when fabricated in an asymmetric configuration, having a stable potential window of 2.0 V in 1.0 M Na2SO4 electrolyte. The nanohybrid showed excellent specific energy and power densities of 34.6 Wh kg-1 (0.1 A g-1) and 14.01 kW kg-1 (10.0 A g-1), respectively. These promising results provide a good substance for developing novel carbon-based metal oxide electrode materials in pseudocapacitor applications.
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Affiliation(s)
- Katlego Makgopa
- Department
of Chemistry, Faculty of Science, Tshwane
University of Technology (Arcadia Campus), Pretoria 0001, South Africa
| | - Mpho S. Ratsoma
- Department
of Chemistry, Faculty of Science, Tshwane
University of Technology (Arcadia Campus), Pretoria 0001, South Africa
| | - Kumar Raju
- Electrochemical
Energy Technologies (EET), Energy Centre,
Council for Scientific and Industrial Research (CSIR), Pretoria 0001, South Africa
| | - Letlhogonolo F. Mabena
- Department
of Chemistry, Faculty of Science, Tshwane
University of Technology (Arcadia Campus), Pretoria 0001, South Africa
| | - Kwena D. Modibane
- Department
of Chemistry, School of Physical and Mineral Sciences, University of Limpopo (Turfloop Campus), Sovenga, 0727 Polokwane, South Africa
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22
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Kiani M, Tian XQ, Zhang W. Non-precious metal electrocatalysts design for oxygen reduction reaction in polymer electrolyte membrane fuel cells: Recent advances, challenges and future perspectives. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213954] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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23
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Dhungana P, Varapragasam SJP, Vemuri B, Baride A, Shrestha N, Balasingam M, Gadhamshetty V, Koppang MD, Hoefelmeyer JD. A pH‐Universal Hollow‐Mn
3
O
4
/MWCNT/Nafion™ Modified Glassy Carbon Electrode for Electrochemical Oxygen Reduction. ChemElectroChem 2021. [DOI: 10.1002/celc.202100168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Pramod Dhungana
- Department of Chemistry University of South Dakota 414 E. Clark St. Vermillion SD 57069 USA
| | | | - Bhuvan Vemuri
- South Dakota School of Mines & Technology 501 E. St. Joseph St. Rapid City SD 57701 USA
| | - Aravind Baride
- Department of Chemistry University of South Dakota 414 E. Clark St. Vermillion SD 57069 USA
| | - Namita Shrestha
- South Dakota School of Mines & Technology 501 E. St. Joseph St. Rapid City SD 57701 USA
| | - Mithira Balasingam
- Department of Chemistry University of South Dakota 414 E. Clark St. Vermillion SD 57069 USA
| | | | - Miles D. Koppang
- Department of Chemistry University of South Dakota 414 E. Clark St. Vermillion SD 57069 USA
| | - James D. Hoefelmeyer
- Department of Chemistry University of South Dakota 414 E. Clark St. Vermillion SD 57069 USA
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24
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Zheng X, Lian Q, Zhou L, Jiang Y, Gao J. Urchin-like trimanganese tetraoxide particles with oxidase-like activity for glutathione detection. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125397] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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25
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Feiz E, Mahyari M, Ghaieni HR, Tavangar S. Visible-light-induced controlled ATRP by modified N-rich holey carbon nitride nanosheets in natural solvent. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Tameu Djoko SY, Bashiri H, Njoyim ET, Arabameri M, Djepang S, Tamo AK, Laminsi S, Tasbihi M, Schwarze M, Schomäcker R. Urea and green tea like precursors for the preparation of g-C3N4 based carbon nanomaterials (CNMs) composites as photocatalysts for photodegradation of pollutants under UV light irradiation. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112596] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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27
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Li L, Fu L, Wang R, Sun J, Li X, Fu C, Fang L, Zhang W. Cobalt, manganese zeolitic-imidazolate-framework-derived Co3O4/Mn3O4/CNx embedded in carbon nanofibers as an efficient bifunctional electrocatalyst for flexible Zn-air batteries. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136145] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Study on the Synthesis of Mn 3o 4 Nanooctahedrons and Their Performance for Lithium Ion Batteries. NANOMATERIALS 2020; 10:nano10020367. [PMID: 32093184 PMCID: PMC7075320 DOI: 10.3390/nano10020367] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/07/2020] [Accepted: 02/18/2020] [Indexed: 11/17/2022]
Abstract
Among the transition metal oxides, the Mn3O4 nanostructure possesses high theoretical specific capacity and lower operating voltage. However, the low electrical conductivity of Mn3O4 decreases its specific capacity and restricts its application in the energy conversion and energy storage. In this work, well-shaped, octahedron-like Mn3O4 nanocrystals were prepared by one-step hydrothermal reduction method. Field emission scanning electron microscope, energy dispersive spectrometer, X-ray diffractometer, X-ray photoelectron spectrometer, high resolution transmission electron microscopy, and Fourier transformation infrared spectrometer were applied to characterize the morphology, the structure, and the composition of formed product. The growth mechanism of Mn3O4 nano-octahedron was studied. Cyclic voltammograms, galvanostatic charge-discharge, electrochemical impedance spectroscopy, and rate performance were used to study the electrochemical properties of obtained samples. The experimental results indicate that the component of initial reactants can influence the morphology and composition of the formed manganese oxide. At the current density of 1.0 A g-1, the discharge specific capacity of as-prepared Mn3O4 nano-octahedrons maintains at about 450 mAh g-1 after 300 cycles. This work proves that the formed Mn3O4 nano-octahedrons possess an excellent reversibility and display promising electrochemical properties for the preparation of lithium-ion batteries.
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Qin J, Long Y, Gou G, Wu W, Luo Y, Cao X, Luo S, Wang K, Ma J. Tuning effect of amorphous Fe 2O 3 on Mn 3O 4 for efficient atom-economic synthesis of imines at low temperature: improving [O] transfer cycle of Mn 3+/Mn 2+ in Mn 3O 4. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01021a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Fe2O3 modified Mn3O4 catalyst (Fe5Mn5-100) has been prepared by adopting a simple co-precipitation method following low temperature baking. Fe5Mn5-100 showed exceptionally high catalytic activity for the production of imine.
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Affiliation(s)
- Jiaheng Qin
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Yu Long
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Galian Gou
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Wei Wu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Yutong Luo
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xiao Cao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Shicheng Luo
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Kaizhi Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jiantai Ma
- State Key Laboratory of Applied Organic Chemistry (SKLAOC)
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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30
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Mantry SP, Mohapatra BD, Behera N, Mishra P, Parhi P, Varadwaj KS. Potentiostatic regeneration of oxygen reduction activity in MnOx @ graphene hybrid nanostructures. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134947] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Shen Q, Chen X, Tan Y, Chen J, Chen L, Tan S. Metal-Free N-Formylation of Amines with CO 2 and Hydrosilane by Nitrogen-Doped Graphene Nanosheets. ACS APPLIED MATERIALS & INTERFACES 2019; 11:38838-38848. [PMID: 31566364 DOI: 10.1021/acsami.9b14509] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
N-Formylation of amines with carbon dioxide (CO2) as a carbonyl source is emerging as an important way for CO2 transformation into high-value-added chemicals; however, the developed catalytic systems mainly focused on transition-metal-based homogeneous catalysts. Herein, we reported rationally designed nitrogen-doped graphene nanosheets (NG) as metal-free catalysts for N-formylation of various amines with CO2 and hydrosilane to formamide under mild conditions. The NG catalyst displayed a wide amine scope with the desired formamide yields up to >99%, demonstrating its comparable catalytic performance to the reported transition-metal-based catalysts. Our experimental research reveals that the N-formylation of aniline involves an initial NG-promoted CO2 hydrosilylation with PhSiH3 to silyl formate and a subsequent nucleophilic attack of the aniline to give N-formanilide. Moreover, the key step of CO2 hydrosilylation can be simplified to a pseudo-first-order reaction under a high CO2 concentration with an observed reaction rate constant (kobs) of 226 h-1 at 40 °C and an apparent activation energy (Ea) of 34 kJ mol-1. In sharp contrast, a kobs of 23 h-1 and Ea of 47 kJ mol-1 were observed under catalyst-free conditions. Our theoretical investigation indicates that NG-promoted CO2 hydrosilylation corresponds to an exergonic reaction (ΔG = -0.53 eV), which is much lower in energy state than that of catalyst-free conditions (ΔG = -0.44 eV). Finally, the NG showed outstanding recyclability in the N-formylation reaction with almost unchanged catalytic performance during twelve-time recycling. This research thus represented a breakthrough in metal-free transformation of CO2 into fine chemicals with low-cost, environment-friendly, and carbon-based catalysts to replace the scarce and expensive transition-metal-based catalysts.
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Affiliation(s)
- Qiujuan Shen
- Guangdong Engineering and Technology Research Centre of Graphene-Like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science , Jinan University , No. 601 Huangpu Avenue West , Tianhe District, Guangzhou 510632 , China
| | - Xuehua Chen
- Guangdong Engineering and Technology Research Centre of Graphene-Like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science , Jinan University , No. 601 Huangpu Avenue West , Tianhe District, Guangzhou 510632 , China
| | - Yiyuan Tan
- Guangdong Engineering and Technology Research Centre of Graphene-Like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science , Jinan University , No. 601 Huangpu Avenue West , Tianhe District, Guangzhou 510632 , China
| | - Jinzhu Chen
- Guangdong Engineering and Technology Research Centre of Graphene-Like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science , Jinan University , No. 601 Huangpu Avenue West , Tianhe District, Guangzhou 510632 , China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering , Zhejiang University , 38 Zheda Road , Hangzhou 310027 , China
| | - Limin Chen
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy , South China University of Technology , 382 Zhonghuan Road East , Guangzhou Higher Education Mega Centre, Panyu District, Guangzhou 510006 , China
| | - Shaozao Tan
- Guangdong Engineering and Technology Research Centre of Graphene-Like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science , Jinan University , No. 601 Huangpu Avenue West , Tianhe District, Guangzhou 510632 , China
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Huang J, Guo X, Wei Y, Hu Q, Yu X, Wang L. A renewable, flexible and robust single layer nitrogen-doped graphene coating Sn foil for boosting formate production from electrocatalytic CO2 reduction. J CO2 UTIL 2019. [DOI: 10.1016/j.jcou.2019.05.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Behera N, Mantry SP, Mohapatra BD, Behera RK, Varadwaj KSK. Functional molecule guided evolution of MnO x nanostructure patterns on N-graphene and their oxygen reduction activity. RSC Adv 2019; 9:27945-27952. [PMID: 35530452 PMCID: PMC9071008 DOI: 10.1039/c9ra04677a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 08/27/2019] [Indexed: 11/21/2022] Open
Abstract
In this work, we systematically followed the growth of MnOx nanostructures on trimesic acid (TMA)/benzoic acid (BA) functionalised nitrogen doped graphene (NG) and studied their electrocatalytic activity towards oxygen reduction reaction (ORR). In these hybrid materials the MnOx phase, their morphology and Mn surface valency were guided by the functional molecules, their concentration and the duration of reaction, which in turn significantly affected the ORR activity. During the growth in the presence of TMA, agglomerated nanostructures were formed at 2 h reaction, which transformed to well dispersed 4–7 nm particles at 6 h over a large area of NG. However, in the presence of BA, MnOOH nano-flecks were formed at 2 h and transformed to MnOOH nanowires and oval shaped Mn3O4 particles at 8 h of reaction. The valency of surface Mn on the different MnOx nanostructures was ascertained by X-ray photoelectron spectroscopy (XPS). The ORR activity of samples were studied by cyclic voltammetry (CV) and rotating disc electrode (RDE) in alkaline medium. Among all the studied samples, the highest ORR activity with most efficient 4e− transfer process is observed for TMA modified NG-MnOX obtained at 6 h of reaction, which is due to its well dispersed nanostructure morphology. In this work, we systematically followed the growth of MnOx nanostructures on trimesic acid (TMA)/benzoic acid (BA) functionalised nitrogen doped graphene (NG) and studied their electrocatalytic activity towards oxygen reduction reaction (ORR).![]()
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Affiliation(s)
- Nibedita Behera
- Department of Chemistry, Ravenshaw University Cuttack Odisha 753003 India
| | - Swarna P Mantry
- Department of Chemistry, Ravenshaw University Cuttack Odisha 753003 India
| | | | - Rajesh K Behera
- Department of Chemistry, Ravenshaw University Cuttack Odisha 753003 India
| | - Kumar S K Varadwaj
- Department of Chemistry, Ravenshaw University Cuttack Odisha 753003 India
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34
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A new approach for the synthesis of electrocatalytically active CoFe2O4 catalyst for oxygen reduction reaction. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.05.065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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35
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Bag S, Roy A, Mitra S. Sulfur, Nitrogen Dual Doped Reduced Graphene Oxide Supported Two‐Dimensional Sb
2
S
3
Nanostructures for the Anode Material of Sodium‐Ion Battery. ChemistrySelect 2019. [DOI: 10.1002/slct.201901153] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sourav Bag
- Department of Energy Science and EngineeringIndian Institute of Technology Bombay Powai Mumbai- 400076 India
- Department of ChemistryUniversity of Calgary 2500 University Dr, Calgary, AB Canada
| | - Amlan Roy
- Department of Energy Science and EngineeringIndian Institute of Technology Bombay Powai Mumbai- 400076 India
| | - Sagar Mitra
- Department of Energy Science and EngineeringIndian Institute of Technology Bombay Powai Mumbai- 400076 India
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36
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Soren S, Hota I, Debnath AK, Aswal DK, Varadwaj KSK, Parhi P. Oxygen Reduction Reaction Activity of Microwave Mediated Solvothermal Synthesized CeO 2/g-C 3N 4 Nanocomposite. Front Chem 2019; 7:403. [PMID: 31245353 PMCID: PMC6562340 DOI: 10.3389/fchem.2019.00403] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/20/2019] [Indexed: 12/03/2022] Open
Abstract
Electrocatalytic active species like transition metal oxides have been widely combined with carbon-based nanomaterials for enhanced Oxygen Reduction Reaction (ORR) studies because of the synergistic effect arising between different components. The aim of the present study is to synthesize CeO2/g-C3N4 system and compare the ORR activity with bare CeO2. Ceria (CeO2) embedded on g-C3N4 nanocomposite was synthesized by a single-step microwave-mediated solvothermal method. This cerium oxide-based nanocomposite displays enhanced ORR activity and electrochemical stability as compared to bare ceria.
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Affiliation(s)
- Siba Soren
- Department of Chemistry, Ravenshaw University, Cuttack, India
| | - Ipsha Hota
- Department of Chemistry, Ravenshaw University, Cuttack, India
| | - A K Debnath
- Technical Physics Division, Bhabha Atomic Research Center, Mumbai, India
| | - D K Aswal
- Technical Physics Division, Bhabha Atomic Research Center, Mumbai, India
| | - K S K Varadwaj
- Department of Chemistry, Ravenshaw University, Cuttack, India
| | - Purnendu Parhi
- Department of Chemistry, Ravenshaw University, Cuttack, India
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37
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Feng X, Huang Y, Li C, Xiao Y, Chen X, Gao X, Chen C. Construction of carnations-like Mn3O4@NiCo2O4@NiO hierarchical nanostructures for high-performance supercapacitors. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.048] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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38
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Selvakumar K, Ulaganathan M, Senthil Kumar SM, Thangamuthu R, Periasamy P, Ragupathy P. Electrospun Carbon Nanofiber Sprinkled with Co
3
O
4
as an Efficient Electrocatalyst for Oxygen Reduction Reaction in Alkaline Medium. ChemistrySelect 2019. [DOI: 10.1002/slct.201803761] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Karuppiah Selvakumar
- Materials Electrochemistry DivisionFlow Battery SectionElectrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | - Mani Ulaganathan
- Materials Electrochemistry DivisionFlow Battery SectionElectrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | - Sakkarapalayam Murugesan Senthil Kumar
- Materials Electrochemistry DivisionFlow Battery SectionElectrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | - Rangasamy Thangamuthu
- Materials Electrochemistry DivisionFlow Battery SectionElectrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | - Padikkasu Periasamy
- Materials Electrochemistry DivisionFlow Battery SectionElectrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | - Pitchai Ragupathy
- Materials Electrochemistry DivisionFlow Battery SectionElectrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
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39
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Garino N, Lamberti A, Stassi S, Castellino M, Fontana M, Roppolo I, Sacco A, Pirri CF, Chiappone A. Multifunctional flexible membranes based on reduced graphene oxide/tin dioxide nanocomposite and cellulose fibers. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.02.095] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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40
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Metallosupramolecular Polymer Precursor Design for Multi-Element Co-Doped Carbon Shells with Improved Oxygen Reduction Reaction Catalytic Activity. Catalysts 2019. [DOI: 10.3390/catal9010102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Heteroatom-doped carbon materials have been extensively studied in the field of electrochemical catalysis to solve the challenges of energy shortage. In particular, there is vigorous research activity in the design of multi-element co-doped carbon materials for the improvement of electrochemical performance. Herein, we developed a supramolecular approach to construct metallosupramolecular polymer hollow spheres, which could be used as precursors for the generation of carbon shells co-doped with B, N, F and Fe elements. The metallosupramolecular polymer hollow spheres were fabricated through a simple route based on the Kirkendall effect. The in situ reaction between the boronate polymer spheres and Fe3+ could easily control the component and shell thickness of the precursors. The as-prepared multi-element co-doped carbon shells showed excellent catalytic activity in an oxygen reduction reaction, with onset potential (Eonset) 0.91 V and half-wave (Ehalf-wave) 0.82 V vs reversible hydrogen electrode (RHE). The fluorine element in the carbon matrix was important for the improvement of oxygen reduction reaction (ORR) activity performance through designing the control experiment. This supramolecular approach may afford a new route to explore good activity and a low-cost catalyst for ORR.
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41
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In situ synthesis of Mn3O4 on Ni foam/graphene substrate as a newly self-supported electrode for high supercapacitive performance. J Colloid Interface Sci 2019; 534:665-671. [DOI: 10.1016/j.jcis.2018.09.077] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/19/2018] [Accepted: 09/22/2018] [Indexed: 11/22/2022]
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42
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Noori MT, Tiwari BR, Ghangrekar MM, Min B. Azadirachta indica leaf-extract-assisted synthesis of CoO–NiO mixed metal oxide for application in a microbial fuel cell as a cathode catalyst. SUSTAINABLE ENERGY & FUELS 2019. [DOI: 10.1039/c9se00661c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this study, a highly efficient yet low-cost mixed transition metal oxide of Ni and Co as CoO–NiO was synthesized using Azadirachta indica leaf extract as a bioactive chelating agent.
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Affiliation(s)
- Md. T. Noori
- Department of Environmental Science and Engineering
- Kyung Hee University
- Yongin-si
- South Korea
| | - B. R. Tiwari
- Department of Civil Engineering
- Indian Institute of Technology Kharagpur
- Kharagpur – 721302
- India
| | - M. M. Ghangrekar
- Department of Civil Engineering
- Indian Institute of Technology Kharagpur
- Kharagpur – 721302
- India
| | - Booki Min
- Department of Environmental Science and Engineering
- Kyung Hee University
- Yongin-si
- South Korea
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43
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Conversion of electrolytic MnO2 to Mn3O4 nanowires for high-performance anode materials for lithium-ion batteries. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.11.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Huang J, Guo X, Yue G, Hu Q, Wang L. Boosting CH 3OH Production in Electrocatalytic CO 2 Reduction over Partially Oxidized 5 nm Cobalt Nanoparticles Dispersed on Single-Layer Nitrogen-Doped Graphene. ACS APPLIED MATERIALS & INTERFACES 2018; 10:44403-44414. [PMID: 30507145 DOI: 10.1021/acsami.8b14822] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Herein, we successfully synthesized partially oxidized 5 nm cobalt nanoparticles dispersed on a single-layer nitrogen-doped graphene (SL-NG) (denoted as PO-5 nm Co/SL-NG) catalyst by a unique and simple one-pot synthesis strategy, which was efficiently applied for highly selective electrocatalytic reduction of carbon dioxide to methanol in 0.1 mol dm-3 aqueous NaHCO3 medium under mild conditions, reaching the maximum faradaic efficiency (FE) of 71.4% for methanol at -0.90 V versus saturated calomel electrode (SCE), possessing a strong electrocatalytic current density of 4 mA cm-2 and a high yield of 1.10 mmol dm-3 h-1, and the corresponding overpotential is as low as 280 mV. Moreover, at -1.0 V versus SCE, a high current density of 10 mA cm-2 can be obtained, and the FE for methanol still remains 23.2%. Notably, the proposed catalyst exhibits prominent stability after 10 h electroreduction of CO2, and the morphology, particle size, structure, and element contents of the catalyst almost remain stable. This work first provides an advanced PO-5 nm Co/SL-NG for selective electroreduction of carbon dioxide into methanol, which simultaneously possesses the merits of high current density, low overpotential, high selectivity, superior FE, and good stability, outperforming most reported electrocatalysts.
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Affiliation(s)
- Jianzhi Huang
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510641 , People's Republic of China
| | - Xinrong Guo
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510641 , People's Republic of China
| | - Guoqing Yue
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510641 , People's Republic of China
| | - Qiong Hu
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510641 , People's Republic of China
| | - Lishi Wang
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510641 , People's Republic of China
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45
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Yan Z, Qi H, Bai X, Huang K, Chen YR, Wang Q. Mn doping of cobalt oxynitride coupled with N-rGO nanosheets hybrid as a highly efficient electrocatalyst for oxygen reduction and oxygen evolution reaction. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.06.185] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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46
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Arul NS, Han JI, Chen PC. Solid State Supercapacitor Based on Manganese Oxide@Reduced Graphene Oxide and Polypyrrole Electrodes. ChemElectroChem 2018. [DOI: 10.1002/celc.201800700] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- N. Sabari Arul
- Department of Chemical and Biochemical Engineering; Dongguk University-Seoul; 04620 Seoul Republic of Korea
| | - Jeong In Han
- Department of Chemical and Biochemical Engineering; Dongguk University-Seoul; 04620 Seoul Republic of Korea
| | - Pao Chi Chen
- Department of Chemical and Materials Engineering; Lunghwa University of Science and Technology; Taiwan
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47
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Huang Z, Qin X, Gu X, Li G, Mu Y, Wang N, Ithisuphalap K, Wang H, Guo Z, Shi Z, Wu G, Shao M. Mn 3O 4 Quantum Dots Supported on Nitrogen-Doped Partially Exfoliated Multiwall Carbon Nanotubes as Oxygen Reduction Electrocatalysts for High-Performance Zn-Air Batteries. ACS APPLIED MATERIALS & INTERFACES 2018; 10:23900-23909. [PMID: 29947509 DOI: 10.1021/acsami.8b06984] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Highly efficient and low-cost nonprecious metal electrocatalysts that favor a four-electron pathway for the oxygen reduction reaction (ORR) are essential for high-performance metal-air batteries. Herein, we show an ultrasonication-assisted synthesis method to prepare Mn3O4 quantum dots (QDs, ca. 2 nm) anchored on nitrogen-doped partially exfoliated multiwall carbon nanotubes (Mn3O4 QDs/N-p-MCNTs) as a high-performance ORR catalyst. The Mn3O4 QDs/N-p-MCNTs facilitated the four-electron pathway for the ORR and exhibited sufficient catalytic activity with an onset potential of 0.850 V (vs reversible hydrogen electrode), which is only 38 mV less positive than that of Pt/C (0.888 V). In addition, the Mn3O4 QDs/N-p-MCNTs demonstrated superior stability than Pt/C in alkaline solutions. Furthermore, a Zn-air battery using the Mn3O4 QDs/N-p-MCNTs cathode catalyst successfully generated a specific capacity of 745 mA h g-1 at 10 mA cm-2 without the loss of voltage after continuous discharging for 105 h. The superior ORR activity of Mn3O4 QDs/N-p-MCNTs can be ascribed to the homogeneous Mn3O4 QDs loaded onto the N-doped carbon skeleton and the synergistic effects of Mn3O4 QDs, nitrogen, and carbon nanotubes. The interface binding energy of -3.35 eV calculated by the first-principles density functional theory method illustrated the high stability of the QD-anchored catalyst. The most stable adsorption structure of O2, at the interface between Mn3O4 QDs and the graphene layer, had the binding energy of -1.17 eV, greatly enhancing the ORR activity. In addition to the high ORR activity and stability, the cost of production of Mn3O4 QDs/N-p-MCNTs is low, which will broadly facilitate the real application of metal-air batteries.
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Affiliation(s)
- Zongxiong Huang
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Smart Energy Research Centre, School of Materials and Energy , Guangdong University of Technology , Guangzhou 510000 , China
| | - Xueping Qin
- Department of Chemical and Biological Engineering , Hong Kong University of Science and Technology , Clear Water Bay, Kowloon , Hong Kong , China
| | - Xiefang Gu
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Smart Energy Research Centre, School of Materials and Energy , Guangdong University of Technology , Guangzhou 510000 , China
| | - Guanzhou Li
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Smart Energy Research Centre, School of Materials and Energy , Guangdong University of Technology , Guangzhou 510000 , China
| | - Yangchang Mu
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Smart Energy Research Centre, School of Materials and Energy , Guangdong University of Technology , Guangzhou 510000 , China
| | - Naiguang Wang
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Smart Energy Research Centre, School of Materials and Energy , Guangdong University of Technology , Guangzhou 510000 , China
| | - Kemakorn Ithisuphalap
- Department of Chemical and Biological Engineering , University at Buffalo, State University of New York , Buffalo , New York 14260 , United States
| | - Hongxia Wang
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , Brisbane , QLD 4001 , Australia
| | - Zaiping Guo
- Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials , University of Wollongong , Innovation Campus , North Wollongong , NSW 2500 , Australia
| | - Zhicong Shi
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Smart Energy Research Centre, School of Materials and Energy , Guangdong University of Technology , Guangzhou 510000 , China
| | - Gang Wu
- Department of Chemical and Biological Engineering , University at Buffalo, State University of New York , Buffalo , New York 14260 , United States
| | - Minhua Shao
- Department of Chemical and Biological Engineering , Hong Kong University of Science and Technology , Clear Water Bay, Kowloon , Hong Kong , China
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48
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Meguerdichian AG, Shirazi-Amin A, Moharreri E, Achola LA, Murphy SC, Macharia J, Zhong W, Jafari T, Suib SL. Synthesis of Large Mesoporous-Macroporous and High Pore Volume, Mixed Crystallographic Phase Manganese Oxide, Mn 2O 3/Mn 3O 4 Sponge. Inorg Chem 2018; 57:6946-6956. [PMID: 29808686 DOI: 10.1021/acs.inorgchem.8b00613] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The controlled synthesis of mixed crystallographic phase Mn2O3/Mn3O4 sponge material by varying heating rates and isothermal segments provides valuable information about the morphological and physical properties of the obtained sample. The well-characterized Mn2O3/Mn3O4 sponge and applicability of difference in reactivity of H2 and CO2 desorbed during the synthesis provide new developments in the synthesis of metal oxide materials with unique morphological and surface properties. We report the preparation of a Mn2O3/Mn3O4 sponge using a metal nitrate salt, water, and Dextran, a biopolymer consisting of glucose monomers. The Mn2O3/Mn3O4 sponge prepared at 1 °C·min-1 heating rate to 500 °C and held isothermally for 1 h consisted of large mesopores-macropores (25.5 nm, pore diameter) and a pore volume of 0.413 mL/g. Furthermore, the prepared Mn2O3/Mn3O4 and 5 mol %-Fe-Mn2O3/Mn3O4 sponges provide potential avenues in the development of solid-state catalyst materials for alcohol and amine oxidation reactions.
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Affiliation(s)
- Andrew G Meguerdichian
- Institute of Materials Science , University of Connecticut , U-3136, 97 N. Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Alireza Shirazi-Amin
- Department of Chemistry , University of Connecticut , U-3060, 55 N. Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Ehsan Moharreri
- Institute of Materials Science , University of Connecticut , U-3136, 97 N. Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Laura A Achola
- Department of Chemistry , University of Connecticut , U-3060, 55 N. Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Steven C Murphy
- Department of Chemistry , University of Connecticut , U-3060, 55 N. Eagleville Road , Storrs , Connecticut 06269 , United States
| | - John Macharia
- Department of Chemistry , University of Connecticut , U-3060, 55 N. Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Wei Zhong
- Institute of Materials Science , University of Connecticut , U-3136, 97 N. Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Tahereh Jafari
- Institute of Materials Science , University of Connecticut , U-3136, 97 N. Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Steven L Suib
- Institute of Materials Science , University of Connecticut , U-3136, 97 N. Eagleville Road , Storrs , Connecticut 06269 , United States.,Department of Chemistry , University of Connecticut , U-3060, 55 N. Eagleville Road , Storrs , Connecticut 06269 , United States.,Department of Chemical & Biomolecular Engineering , University of Connecticut , U-3222, 191 Auditorium Road , Storrs , Connecticut 06269 , United States
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49
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Mallick S, Jana PP, Raj CR. Asymmetric Supercapacitor Based on Chemically Coupled Hybrid Material of Fe2
O3
-Fe3
O4
Heterostructure and Nitrogen-Doped Reduced Graphene Oxide. ChemElectroChem 2018. [DOI: 10.1002/celc.201800521] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sourav Mallick
- Functional Materials and Electrochemistry Lab; Department of Chemistry; Indian Institute of Technology; Kharagpur India
| | - Partha Pratim Jana
- Department of Chemistry; Indian Institute of Technology; Kharagpur India
| | - C. Retna Raj
- Functional Materials and Electrochemistry Lab; Department of Chemistry; Indian Institute of Technology; Kharagpur India
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Kim NI, Sa YJ, Yoo TS, Choi SR, Afzal RA, Choi T, Seo YS, Lee KS, Hwang JY, Choi WS, Joo SH, Park JY. Oxygen-deficient triple perovskites as highly active and durable bifunctional electrocatalysts for oxygen electrode reactions. SCIENCE ADVANCES 2018; 4:eaap9360. [PMID: 29951583 PMCID: PMC6018999 DOI: 10.1126/sciadv.aap9360] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 04/27/2018] [Indexed: 05/15/2023]
Abstract
Highly active and durable bifunctional oxygen electrocatalysts have been of pivotal importance for renewable energy conversion and storage devices, such as unitized regenerative fuel cells and metal-air batteries. Perovskite-based oxygen electrocatalysts have emerged as promising nonprecious metal bifunctional electrocatalysts, yet their catalytic activity and stability still remain to be improved. We report a high-performance oxygen electrocatalyst based on a triple perovskite, Nd1.5Ba1.5CoFeMnO9-δ (NBCFM), which shows superior activity and durability for oxygen electrode reactions to single and double perovskites. When hybridized with nitrogen-doped reduced graphene oxide (N-rGO), the resulting NBCFM/N-rGO catalyst shows further boosted bifunctional oxygen electrode activity (0.698 V), which surpasses that of Pt/C (0.801 V) and Ir/C (0.769 V) catalysts and which, among the perovskite-based electrocatalysts, is the best activity reported to date. The superior catalytic performances of NBCFM could be correlated to its oxygen defect-rich structure, lower charge transfer resistance, and smaller hybridization strength between O 2p and Co 3d orbitals.
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Affiliation(s)
- Nam-In Kim
- Hybrid Materials Center, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Young Jin Sa
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Tae Sup Yoo
- Department of Physics, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sung Ryul Choi
- Hybrid Materials Center, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Rana Arslan Afzal
- Hybrid Materials Center, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Taekjib Choi
- Hybrid Materials Center, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Young-Soo Seo
- Hybrid Materials Center, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Kug-Seung Lee
- Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
| | - Jun Yeon Hwang
- Carbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology Jeonbuk Branch, Jeonbuk 55324, Republic of Korea
| | - Woo Seok Choi
- Department of Physics, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sang Hoon Joo
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
- Corresponding author. (J.-Y.P.); (S.H.J.)
| | - Jun-Young Park
- Hybrid Materials Center, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
- Corresponding author. (J.-Y.P.); (S.H.J.)
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