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Huang J, Liu X, Yuan D, Chen X, Wang M, Li M, Zhang L. Renewable lignin-derived heteroatom-doped porous carbon nanosheets as an efficient oxygen reduction catalyst for rechargeable zinc-air batteries. J Colloid Interface Sci 2024; 664:25-32. [PMID: 38458052 DOI: 10.1016/j.jcis.2024.03.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/10/2024]
Abstract
Lignin upgrading to various functional products is promising to realize high-value utilization of low-cost and renewable biomass waste, but is still in its infancy. Herein, using industry waste lignosulfonate as the biomass-based carbon source and urea as the dopant, we constructed a heteroatom-doped porous carbon nanosheet structure by a simple NaCl template-assisted pyrolytic strategy. Through the synergistic effect of the NaCl template and urea, the optimized lignin-derived porous carbon catalyst with high content of active nitrogen species and large specific surface area can be obtained. As a result, the fabricated catalysts exhibited excellent electrocatalytic oxygen reduction activity, as well as good methanol tolerance and stability, comparable to that of commercial Pt/C. Moreover, rechargeable Zn-air batteries assembled with this electrocatalyst have a peak power density of up to 150 mW cm-2 and prominent long-term cycling stability. This study offers an inexpensive and efficient way for the massive production of highly active metal-free catalysts from the plentiful, inexpensive and environmentally friendly lignin, offering a good direction for biomass waste recycling and utilization.
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Affiliation(s)
- Jie Huang
- College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong Province, Qingdao University, Qingdao 266071, PR China
| | - Xuejun Liu
- College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong Province, Qingdao University, Qingdao 266071, PR China.
| | - Ding Yuan
- Industrial Research Institute of Nonwovens & Technical Textiles, Shandong Center for Engineered Nonwovens, College of Textiles & Clothing, Qingdao University, Qingdao 266071, Shandong, PR China
| | - Xiaolan Chen
- College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong Province, Qingdao University, Qingdao 266071, PR China
| | - Minghui Wang
- Industrial Research Institute of Nonwovens & Technical Textiles, Shandong Center for Engineered Nonwovens, College of Textiles & Clothing, Qingdao University, Qingdao 266071, Shandong, PR China
| | - Meiyue Li
- College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong Province, Qingdao University, Qingdao 266071, PR China
| | - Lixue Zhang
- College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong Province, Qingdao University, Qingdao 266071, PR China; School of Petroleum and Chemical Engineering, Dongying Vocational Institute, Dongying 257091, PR China.
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2
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Gao Y, Lei H, Bao Z, Liu X, Qin L, Yin Z, Li H, Huang S, Zhang W, Cao R. Electrocatalytic oxygen reduction with cobalt corroles bearing cationic substituents. Phys Chem Chem Phys 2023; 25:4604-4610. [PMID: 36723094 DOI: 10.1039/d2cp05786g] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Recent decades have seen increasing interest in developing highly active and selective electrocatalysts for the oxygen reduction reaction (ORR). The active site environment of cytochrome c oxidases (CcOs), including electrostatic and hydrogen-bonding interactions, plays an important role in promoting the selective conversion of dioxygen to water. Herein, we report the synthesis of three CoIII corroles, namely 1 (with a 10-phenyl ortho-trimethylammonium cationic group), 2 (with a 10-phenyl ortho-dimethylamine group) and 3 (with a 10-phenyl para-trimethylammonium cationic group) as well as their electrocatalytic ORR activities in both acidic and neutral solutions. We discovered that 1 is much more active and selective than 2 and 3 for the electrocatalytic four-electron ORR. Importantly, 1 showed ORR activities with half-wave potentials at E1/2 = 0.75 V versus RHE in 0.5 M H2SO4 solutions and at E1/2 = 0.70 V versus RHE in neutral 0.1 M phosphate buffer solutions. This work is significant for outlining a strategy to increase both the activity and selectivity of metal corroles for the electrocatalytic ORR by introducing cationic units.
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Affiliation(s)
- Yimei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Haitao Lei
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Zijia Bao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Xinrong Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Lingshuang Qin
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Zhiyuan Yin
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Huiyuan Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Shu Huang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
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3
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Stimulation of ethylene glycol electrooxidation on electrodeposited Ni–PbO2–GN nanocomposite in alkaline medium. J APPL ELECTROCHEM 2022. [DOI: 10.1007/s10800-022-01792-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
AbstractIn this work, a novel system composed of non-precious nickel-based metal oxide/reduced graphene oxide nanocomposite (Ni–PbO2–GN) is used for electrooxidation of ethylene glycol (EG) in 1.0 M NaOH solution and compares its activity with that of Ni, Ni–GN, and Ni–PbO2. The facile electrodeposition technique is used to prepare the catalysts on glassy carbon (GC) substrates. The outcomes of electrochemical measurements show a high performance towards EG oxidation is obtained for Ni-nanocomposite electrodes compared to that of Ni mainly due to their higher surface areas. The excellent electrocatalytic properties of the Ni-nanocomposite could be ascribed to the synergistic contributions of PbO2 and graphene (GN) nano-sheets that help the reduction of Ni grains. A smaller charge transfer resistance value of 34.5 Ω cm2 for EG oxidation reaction at + 360 mV is recorded for GC/Ni–PbO2–GN compared to the other prepared electrodes. Moreover, it exhibits higher kinetic parameters of EG such as diffusion coefficient (D = 3.9 × 10–10 cm2 s−1) and charge transfer rate constant (ks = 32.5 mol−1 cm3 s−1). The overall performance and stability of the prepared catalysts towards EG electrooxidation have been estimated to be in the order of GC/Ni–PbO2–GN > GC/Ni–GN > GC/Ni–PbO2 > GC/Ni.
Graphical abstract
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4
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Kashinath L, Byrappa K. Ceria Boosting on In Situ Nitrogen-Doped Graphene Oxide for Efficient Bifunctional ORR/OER Activity. Front Chem 2022; 10:889579. [PMID: 35815209 PMCID: PMC9263449 DOI: 10.3389/fchem.2022.889579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/02/2022] [Indexed: 11/21/2022] Open
Abstract
In the present work, a highly efficient and excellent electrocatalyst material for bifunctional oxygen reduction/evolution reaction (ORR/OER) was synthesized using the microwave-assisted hydrothermal method. In brief, ultrafine hexagonal cerium oxide (CeO2) nanoparticles were tailored on the layered surface of in situ nitrogen-doped graphene oxide (NGO) sheets. The nanocomposites exhibited a high anodic onset potential of 0.925 V vs. RHE for ORR activity and 1.2 V for OER activity with a very high current density in 0.5 M KOH. The influence of oxygen cluster on Ce3+/Ce4+ ion decoration on outward/inward in situ nitrogen-coupled GO enhanced the physicochemical properties of composites and in turn increased electron transferability. The microwave-assisted hydrothermal coupling technique provides a higher density, active sites on CeO2@NGO composites, and oxygen deficiency structures in ultrafine Ce-O particles and boosts higher charge transferability in the composites. It is believed that the physical states of Ce-N- C, Ce-C=O, and a higher amount of oxygen participation with ceria increase the density of composites that in turn increases the efficiency. N-doped graphene oxide promotes high current conduction and rapid electron transferability while reducing the external transport resistance in oxygen electrocatalysis by sufficient mass transfer through in-built channels. This study may provide insights into the knowledge of Ce-enabled bifunctional activity to guide the design of a robust catalyst for electrochemical performance.
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Affiliation(s)
- L. Kashinath
- Centre for Materials Science and Technology, University of Mysore, Mysore, India
- Experimental Physics Lab, Division of Materials Science, Department of Engineering Science and Mathematics, Lulea University of Technology, Lulea, Sweden
- *Correspondence: L. Kashinath,
| | - K. Byrappa
- Centre for Materials Science and Technology, University of Mysore, Mysore, India
- Adichunchanagiri University, Mandya, India
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5
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Arvas MB, Gürsu H, Gencten M, Sahin Y. New Approach Synthesis of S, N Co‐Doped Graphenes for High‐Performance Supercapacitors. ChemistrySelect 2022. [DOI: 10.1002/slct.202200360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Melih Besir Arvas
- Department of Chemistry Faculty of Arts and Science Yildiz Technical University Istanbul 34220 Turkey
- Science and Technology Application and Research Center Yildiz Technical University Istanbul 34200 Turkey
| | - Hurmus Gürsu
- Department of Chemistry Faculty of Arts and Science Yildiz Technical University Istanbul 34220 Turkey
- Science and Technology Application and Research Center Yildiz Technical University Istanbul 34200 Turkey
| | - Metin Gencten
- Department of Metallurgy and Materials Engineering Faculty of Chemical and Metallurgical Engineering Yildiz Technical University 34220 Istanbul Turkey
| | - Yucel Sahin
- Department of Chemistry Faculty of Arts and Science Yildiz Technical University Istanbul 34220 Turkey
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6
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Zaera F. Designing Sites in Heterogeneous Catalysis: Are We Reaching Selectivities Competitive With Those of Homogeneous Catalysts? Chem Rev 2022; 122:8594-8757. [PMID: 35240777 DOI: 10.1021/acs.chemrev.1c00905] [Citation(s) in RCA: 69] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A critical review of different prominent nanotechnologies adapted to catalysis is provided, with focus on how they contribute to the improvement of selectivity in heterogeneous catalysis. Ways to modify catalytic sites range from the use of the reversible or irreversible adsorption of molecular modifiers to the immobilization or tethering of homogeneous catalysts and the development of well-defined catalytic sites on solid surfaces. The latter covers methods for the dispersion of single-atom sites within solid supports as well as the use of complex nanostructures, and it includes the post-modification of materials via processes such as silylation and atomic layer deposition. All these methodologies exhibit both advantages and limitations, but all offer new avenues for the design of catalysts for specific applications. Because of the high cost of most nanotechnologies and the fact that the resulting materials may exhibit limited thermal or chemical stability, they may be best aimed at improving the selective synthesis of high value-added chemicals, to be incorporated in organic synthesis schemes, but other applications are being explored as well to address problems in energy production, for instance, and to design greener chemical processes. The details of each of these approaches are discussed, and representative examples are provided. We conclude with some general remarks on the future of this field.
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Affiliation(s)
- Francisco Zaera
- Department of Chemistry and UCR Center for Catalysis, University of California, Riverside, California 92521, United States
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7
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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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8
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Jin X, Gu TH, Kwon NH, Hwang SJ. Synergetic Advantages of Atomically Coupled 2D Inorganic and Graphene Nanosheets as Versatile Building Blocks for Diverse Functional Nanohybrids. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005922. [PMID: 33890336 DOI: 10.1002/adma.202005922] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/20/2020] [Indexed: 05/05/2023]
Abstract
2D nanostructured materials, including inorganic and graphene nanosheets, have evoked plenty of scientific research activity due to their intriguing properties and excellent functionalities. The complementary advantages and common 2D crystal shapes of inorganic and graphene nanosheets render their homogenous mixtures powerful building blocks for novel high-performance functional hybrid materials. The nanometer-level thickness of 2D inorganic/graphene nanosheets allows the achievement of unusually strong electronic couplings between sheets, leading to a remarkable improvement in preexisting functionalities and the creation of unexpected properties. The synergetic merits of atomically coupled 2D inorganic-graphene nanosheets are presented here in the exploration of novel heterogeneous functional materials, with an emphasis on their critical roles as hybridization building blocks, interstratified sheets, additives, substrates, and deposited monolayers. The great flexibility and controllability of the elemental compositions, defect structures, and surface natures of inorganic-graphene nanosheets provide valuable opportunities for exploring high-performance nanohybrids applicable as electrodes for supercapacitors and rechargeable batteries, electrocatalysts, photocatalysts, and water purification agents, to give some examples. An outlook on future research perspectives for the exploitation of emerging 2D nanosheet-based hybrid materials is also presented along with novel synthetic strategies to maximize the synergetic advantage of atomically mixed 2D inorganic-graphene nanosheets.
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Affiliation(s)
- Xiaoyan Jin
- Department of Materials Science and Engineering, College of Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Tae-Ha Gu
- Department of Chemistry and Nanoscience, College of Natural Science, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - Nam Hee Kwon
- Department of Materials Science and Engineering, College of Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Seong-Ju Hwang
- Department of Materials Science and Engineering, College of Engineering, Yonsei University, Seoul, 03722, Republic of Korea
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9
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A High-Sensitivity SPR Sensor with Bimetal/Silicon/Two-Dimensional Material Structure: A Theoretical Analysis. PHOTONICS 2021. [DOI: 10.3390/photonics8070270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this paper, we reported a theoretical study of a novel Surface plasmon resonance (SPR) biosensor composed of BK7 prism, gold (Au)/silver (Ag) bimetallic layer, silicon and two-dimensional (2D) materials. The bimetallic layer combines the advantages of Au and Ag and the high refractive index silicon layer enhances the electric field on the surface of the sensor, so that the sensor has a better overall performance in terms of sensitivity and figure of merit (FOM). Compared with ordinary dielectrics, 2D materials have excellent photoelectric properties, such as larger specific surface area, higher carrier density and stronger adsorption capacity, which improve the detection ability of the sensor. The sensitivity of the optimized sensor achieves 297.2°/RIU, 274°/RIU and 246°/RIU when the silicon layer is covered with graphene, MXene (Ti3T2Cx) and MoS2, respectively. Compared with the traditional SPR sensor, the sensitivity of the structure has been significantly improved, and its excellent performance has broad application prospects in biosensing and other fields.
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10
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Testing PtCu Nanoparticles Supported on Highly Ordered Mesoporous Carbons CMK3 and CMK8 as Catalysts for Low-Temperature Fuel Cells. Catalysts 2021. [DOI: 10.3390/catal11060724] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Pt(Cu) nanoparticles supported on CMK3 and CMK8 ordered mesoporous carbons (OMCs) have been synthesized by electroless deposition of Cu followed by galvanic exchange with Pt. The structural characterization by high-resolution transmission electron microscopy and X-ray diffraction showed the formation of Pt(Cu) nanoparticles of 4–5 nm, in which PtCu alloys with contracted fcc Pt lattice and 70–80 at.% Pt was identified. The X-ray photoelectron spectroscopy analyses indicated that the Pt(Cu) nanoparticles were mainly composed of a PtCu alloy core covered by a Pt-rich shell, in agreement with the steady cyclic voltammograms, which did not show any Cu oxidation peaks. Electroactive surface areas up to about 70 m2 gPt−1 were obtained. The onset potentials for CO oxidation and the oxygen reduction reaction were more negative and positive, respectively, as compared to Pt/C, thus indicating higher activity of these Pt(Cu) catalysts with respect to the latter. Based on the corresponding binding energies, these better activities were attributed to the favorable geometric and ligand effects of Cu on Pt, which were able to reduce the adsorption energy of the intermediates on Pt. Pt(Cu)/CMK3 showed competitive mass and specific activities, as well as better stability than Pt/C.
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11
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Riyaz M, Gupta S, Goel N. First Principle Studies to Tailor Graphene Through Synergistic Effect as a Highly Efficient Electrocatalyst for Oxygen Evolution Reaction. Chemphyschem 2021; 22:1141-1147. [PMID: 33871907 DOI: 10.1002/cphc.202001020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 04/07/2021] [Indexed: 11/06/2022]
Abstract
The Oxygen Evolution Reaction (OER) is one of the major roadblocks for electrocatalytic oxidation of water (water splitting) and for designing efficient metal-air batteries. Herein, we present a comprehensive study to design graphene based efficient electrocatalyst, modified by doping with main group elements Al, Si, P, S and co-doping with B and N, for OER using DFT computations. Four elementary steps in the OER reaction have been traced, free energy change for each elementary step was calculated considering thermodynamic corrections. Out of all the doped models, S doped graphene shows maximum efficiency that was further enhanced by adjusting the concentration of codopants B and N around the active dopant site. Our results show that synergy between codopants B and N and dopant S atom leads to high electrocatalytic efficiency of modified graphene towards OER and brings down the overpotential to as low as 0.44 V.
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Affiliation(s)
- Mohd Riyaz
- Theoretical & Computational Chemistry group, Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Shuchi Gupta
- University Institute of Engineering and Technology, Panjab University, Chandigarh, 160014, India
| | - Neetu Goel
- Theoretical & Computational Chemistry group, Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
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12
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Kasibhatta KRD, Madakannu I, Prasanthi I. Hetero Atom Doped Graphene Nanoarchitectonics as Electrocatalysts Towards the Oxygen Reduction and Evolution Reactions in Acidic Medium. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-020-01834-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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13
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Lei H, Zhang Q, Wang Y, Gao Y, Wang Y, Liang Z, Zhang W, Cao R. Significantly boosted oxygen electrocatalysis with cooperation between cobalt and iron porphyrins. Dalton Trans 2021; 50:5120-5123. [PMID: 33881086 DOI: 10.1039/d1dt00441g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Developing electrocatalysts for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is of great importance. Herein, Co tetrakis(pentafluorophenyl)porphyrin (Co-P) and Fe chloride tetrakis(pentafluorophenyl)porphyrin (Fe-P) were loaded on carbon nanotubes (CNTs) for combining the electrocatalytic advantages of both Co-P and Fe-P. The resultant (Co-P)0.5(Fe-P)0.5@CNT composite displayed significantly boosted activity for the selective four-electron ORR with a half-wave potential of 0.80 V versus reversible hydrogen electrode (RHE) and for the OER with a potential of 1.65 V versus RHE to obtain 10 mA cm-2 current density in 0.1 M KOH. A Zn-air battery assembled from (Co-P)0.5(Fe-P)0.5@CNT exhibited a small charge-discharge voltage gap of 0.74 V at 2 mA cm-2, a high power density of 174.5 mW cm-2 and a good rechargeable stability (>120 cycles).
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Affiliation(s)
- Haitao Lei
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Qingxin Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Yabo Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Yimei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Yanzhi Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Zuozhong Liang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
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15
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Yan X, Zhuang L, Zhu Z, Yao X. Defect engineering and characterization of active sites for efficient electrocatalysis. NANOSCALE 2021; 13:3327-3345. [PMID: 33564804 DOI: 10.1039/d0nr08976a] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Electrocatalysis plays a decisive role in various energy-related applications. Engineering the active sites of electrocatalysts is an important aspect to promote their catalytic performance. In particular, defect engineering provides a feasible and efficient approach to improve the intrinsic activities and increase the number of active sites in electrocatalysts. In this review, recent investigations on defect engineering of a wide range of electrocatalysts such as metal-free carbon materials, transition metal oxides, transition metal dichalcogenides and metal-organic frameworks (MOFs) will be summarized. Different defect creation strategies will be outlined, for example, heteroatom doping and removal, plasma irradiation, hydrogenation, amorphization, phase transition and reduction treatment. In addition, we will overview the commonly used advanced characterization techniques that could confirm the existence and identify the detailed structures, types and concentration of defects in electrocatalysts. The defect characterization tools are beneficial for gaining an in-depth understanding of defects on electrocatalysis and thus could reveal the structure-performance relationship. Finally, the major challenges and future development directions on defect engineering of electrocatalysts will be discussed.
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Affiliation(s)
- Xuecheng Yan
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia.
| | - Linzhou Zhuang
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhonghua Zhu
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Xiangdong Yao
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia.
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16
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Zhang Q, Zhang X, Wang J, Wang C. Graphene-supported single-atom catalysts and applications in electrocatalysis. NANOTECHNOLOGY 2021; 32:032001. [PMID: 33002887 DOI: 10.1088/1361-6528/abbd70] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Supported metal nanostructures are the most extensively studied heterogeneous catalysts, benefiting from easy separation, regeneration and affordable cost. The size of the supported metal species is one of the decisive factors in determining the activity of heterogeneous catalysts. Particularly, the unsaturated coordination environment of metal atoms preferably act as the active centers, minimizing these metal species can significantly boost the specific activity of every single metal atom. Single-atom catalysts/catalysis (SACs), containing isolated metals atomically dispersed on or coordinated with the surface of a support material, represent the ultimate utilization of supported metals and maximize metal usage efficiency. Graphene, a two-dimensional star material, exhibiting extraordinary physical and chemical properties, has been approved as an excellent platform for constructing SACs. When atomically dispersed metal atoms are strongly anchored on the graphene surface, featuring ultra-high surface area and excellent electronic properties, SACs offer a great potential to significantly innovate the conventional heterogeneous catalysis, especially in the field of electrocatalysis. In this review, a detailed discussion of graphene-supported SACs, including preparation approaches, characterization techniques and applications on typical electrocatalytic reactions is provided. The advantages and unique features of graphene-supported SACs as efficient electrocatalysts and the upcoming challenges for improving their performance and further practical applications are also highlighted.
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Affiliation(s)
- Qin Zhang
- CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
| | - Xiaoxiang Zhang
- CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
| | - Junzhong Wang
- CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
| | - Congwei Wang
- CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
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17
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Kuzmin AV, Shainyan BA. Theoretical Density Functional Theory Study of Electrocatalytic Activity of MN 4-Doped (M = Cu, Ag, and Zn) Single-Walled Carbon Nanotubes in Oxygen Reduction Reactions. ACS OMEGA 2021; 6:374-387. [PMID: 33458489 PMCID: PMC7807812 DOI: 10.1021/acsomega.0c04727] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
The mechanism of oxygen reduction reaction (ORR) on transition metal-doped nitrogen codoped single-walled nanotubes, C114H24MN4 (MN4-CNT where M = Zn, Cu, or Ag; N = pyridinic nitrogen), has been studied with the density functional theory method at the ωB97XD/DGDZVP level of theory. The charge density analysis revealed two active sites of the catalyst toward ORR: the MN4 site and the C=C bond of the N-C=C-N metal-chelating fragment (C2 site). The structure of O-containing adsorbates (O2 *, HOO*, O*, HO*, etc.) on the two sites and the corresponding adsorption energies were determined. The analysis of the free energy diagrams allows to conclude that the 4e - mechanism of ORR is thermodynamically preferable for all the studied catalysts. The probability of the 2e - mechanism of ORR with the formation of hydrogen peroxide decreases in the order Cu > Ag > Zn. The most and the least exergonic steps of the conventional 4e - mechanism of ORR on each active site of model catalysts as well as the electrode potentials of deceleration and of maximum catalytic activity in both acidic and alkaline media are determined. The relative catalytic activity toward ORR increases in the order Zn < Ag ≪ Cu and is mainly attributed to the C2 site rather than the MN4 site, while combined catalytic activity of the two sites (AgN4/C2 sites) is predicted for the AgN4-CNT catalyst.
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Affiliation(s)
- Anton V. Kuzmin
- A.
E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of Russian Academy of Sciences, 1 Favorsky str., 664033 Irkutsk, Russia
- Limnological
Institute, Siberian Branch of Russian Academy
of Sciences, 3 Ulan-Batorskaya
str., 664033 Irkutsk, Russia
| | - Bagrat A. Shainyan
- A.
E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of Russian Academy of Sciences, 1 Favorsky str., 664033 Irkutsk, Russia
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Meirinho S, Ferraria A, do Rego AB, Fernandes A, Viana A, Fernandes J, Oliveira M. Electrochemical properties of oxygen-enriched carbon-based nanomaterials. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114420] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Kuzmin AV, Shainyan BA. Single Si-Doped Graphene as a Catalyst in Oxygen Reduction Reactions: An In Silico Study. ACS OMEGA 2020; 5:15268-15279. [PMID: 32637800 PMCID: PMC7331052 DOI: 10.1021/acsomega.0c01303] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
Single Si-doped graphene C53H18Si with one carbon atom replaced by a three-coordinate silicon atom is studied by density functional theory (DFT) calculations as a catalyst for the oxygen reduction reactions (ORRs) in both acidic and alkaline media. The active sites for oxygen adsorption were determined from the distribution of the charge density difference analysis. At the equilibrium electrode potential, the most stable intermediate was found to have the structure HO*O*-C53H18Si with both oxygen atoms bound to the support, one of them being incorporated in between Si and C atoms, corresponding to the transfer of one hydrogen atom [H+ + e-]. The 2e ORR mechanism is shown to be very unlikely because the alternative 4e ORR pathway occurring via intermediates with a broken O-O bond is much more exothermic. In addition to the commonly adopted ORR mechanism, new reaction pathways have been discovered and shown to be potentially preferable over the traditional mechanism. The new proposed four-electron ORR route was predicted to proceed spontaneously in acidic media at U < 0.99 V and in alkaline media at U < 0.22.
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Vashchenko AV, Kuzmin AV, Shainyan BA. Si-Doped Single-Walled Carbon Nanotubes as Potential Catalysts for Oxygen Reduction Reactions. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220030196] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
We introduce a computational approach to study porphyrin-like transition metal complexes, bridging density functional theory and exact many-body techniques, such as the density matrix renormalization group (DMRG). We first derive a multi-orbital Anderson impurity Hamiltonian starting from first principles considerations that qualitatively reproduce generalized gradient approximation (GGA)+U results when ignoring inter-orbital Coulomb repulsion U ′ and Hund exchange J. An exact canonical transformation is used to reduce the dimensionality of the problem and make it amenable to DMRG calculations, including all many-body terms (both intra- and inter-orbital), which are treated in a numerically exact way. We apply this technique to FeN 4 centers in graphene and show that the inclusion of these terms has dramatic effects: as the iron orbitals become single occupied due to the Coulomb repulsion, the inter-orbital interaction further reduces the occupation, yielding a non-monotonic behavior of the magnetic moment as a function of the interactions, with maximum polarization only in a small window at intermediate values of the parameters. Furthermore, U ′ changes the relative position of the peaks in the density of states, particularly on the iron d z 2 orbital, which is expected to affect the binding of ligands greatly.
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Oxygen Reduction Reaction Catalyzed by Pt3M (M = 3d Transition Metals) Supported on O-doped Graphene. Catalysts 2020. [DOI: 10.3390/catal10020156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Pt3M (M = 3d transition metals) supported on oxygen-doped graphene as an electrocatalyst for oxygen reduction was investigated using the periodic density functional theory-based computational method. The results show that oxygen prefers to adsorb on supported Pt3M in a bridging di-oxygen configuration. Upon reduction, the O–O bond breaks spontaneously and the oxygen adatom next to the metal–graphene interface is hydrogenated, resulting in co-adsorbed O* and OH* species. Water formation was found to be the potential-limiting step on all catalysts. The activity for the oxygen reduction reaction was evaluated against the difference of the oxygen adsorption energy on the Pt site and the M site of Pt3M and the results indicate that the oxygen adsorption energy difference offers an improved prediction of the oxygen reduction activity on these catalysts. Based on the analysis, Pt3Ni supported on oxygen-doped graphene exhibits an enhanced catalytic performance for oxygen reduction over Pt4.
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In-situ fabrication of reduced graphene oxide/leucomethylene blue/platinum nanoparticles modified electrode for voltammetric determination of trace Fe(II) in seawater. Microchem J 2019. [DOI: 10.1016/j.microc.2019.104210] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Lozano T, Rankin RB. Size, Composition, and Support-Doping Effects on Oxygen Reduction Activity of Platinum-Alloy and on Non-platinum Metal-Decorated-Graphene Nanocatalysts. Front Chem 2019; 7:610. [PMID: 31608270 PMCID: PMC6761360 DOI: 10.3389/fchem.2019.00610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 08/20/2019] [Indexed: 11/13/2022] Open
Abstract
Recent investigations reported in the open literature concerning the functionalization of graphene as a support material for transition metal nanoparticle catalysts have examined isolated systems for their potential Oxygen Reduction Reaction (ORR) activity. In this work we present results which characterize the ability to use functionalized graphene (via dopants B, N) to upshift and downshift the adsorption energy of mono-atomic oxygen, O* (the ORR activity descriptor on ORR Volcano Plots), for various compositions of 4-atom, 7-atom, and 19-atom sub-nanometer binary alloy/intermetallic transition metal nanoparticle catalysts on graphene (TMNP-MDG). Our results show several important and interesting features: (1) that the combination of geometric and electronic effects makes development of simple linear mixing rules for size/composition difficult; (2) that the transition from 4- to 7- to 19-atom TMNP on MDG has pronounced effects on ORR activity for all compositions; (3) that the use of B and N as dopants to modulate the graphene-TMNP electronic structure interaction can cause shifts in the oxygen adsorption energy of 0.5 eV or more; (4) that it might be possible to make specific doped-graphene-NixCuy TMNP systems which fall close to the Volcano Peak for ORR. Our results point to systems which should be investigated experimentally and may improve the viability of future fuel cell or other ORR applications, and provide new paths for future investigations of more detail for TMNP-MDG screening.
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Affiliation(s)
- Tamara Lozano
- Department of Chemical Engineering, Villanova University, Villanova, PA, United States
| | - Rees B Rankin
- Department of Chemical Engineering, Villanova University, Villanova, PA, United States
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Metallic Organic Framework-Derived Fe, N, S co-doped Carbon as a Robust Catalyst for the Oxygen Reduction Reaction in Microbial Fuel Cells. ENERGIES 2019. [DOI: 10.3390/en12203846] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Oxygen reduction reaction (ORR) provides a vital role for microbial fuel cells (MFCs) due to its slow reaction kinetics compared with the anodic oxidation reaction. How to develop new materials with low cost, high efficacy, and eco-friendliness which could replace platinum-based electrocatalysis is a challenge that we have to resolve. In this work, we accomplished this successfully by means of a facile strategy to synthesize a metallic organic framework-derived Fe, N, S co-doped carbon with FeS as the main phase. The Fe/S@N/C-0.5 catalyst demonstrated outstandingly enhanced ORR activity in neutral PBS and alkaline media, compared to that of commercial 20% Pt-C catalyst. Here, we started-up and operated two parallel single-chamber microbial fuel cells of an air cathode, and those cathode catalysts were Fe/S@N/C-0.5 and commercial Pt-C (20% Pt), respectively. Scanning electron microscopy (SEM) elaborated that the Fe/S@N/C-0.5 composite did not change the polyhedron morphology of ZIF-8. According to X-ray diffractometry(XRD) curves, the main crystal phase of the resulted Fe/S@N/C-0.5 was FeS. The chemical environment of N, S, and Fe which are anticipated to be the high-efficiency active sites of ORR for MFCs were investigated by X-ray photoelectron spectroscopic(XPS). Nitrogen adsorption/desorption techniques were used to calculate the pore diameter distribution. In brief, the obtained Fe/S@N/C-0.5 material exhibited a pronounced reduction potential at 0.861 V (versus Reversible Hydrogen Electrode(RHE)) in 0.1M KOH solution and –0.03 V (vs. SCE) in the PBS solution, which both outperform the benchmark platinum-based catalysts. Fe/S@N/C-0.5-MFC had a higher Open Circuit Voltage(OCV) (0.71 V), stronger maximum power density (1196 mW/m2), and larger output voltage (0.47 V) than the Pt/C-MFC under the same conditions.
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Fe-boosting Sn-based dual-shell nanostructures from new covalent porphyrin frameworks as efficient electrocatalysts for oxygen reduction and zinc-air batteries. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134593] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Cui C, Luo Z, Yao J. Enhanced Catalysis of Pt3 Clusters Supported on Graphene for N–H Bond Dissociation. CCS CHEMISTRY 2019. [DOI: 10.31635/ccschem.019.20180031] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We report an in-depth study of catalytic N–H bond dissociation with typical platinum clusters on graphene supports. Among all the pristine graphene- and defective graphene-supported Pt clusters of different sizes that were studied, the Pt 3/G cluster possesses the highest reactivity and lowest activation barriers for each step of N–H dissociation in the decomposition of ammonia. In analyzing the reaction coordinates and projected density of states of the outermost orbitals, we found that the standing triangular Pt 3 on graphene creates prominent Lewis acid/base pair sites, which accommodate the adsorption and subsequent dissociation of *NH x . In comparison, Pt 1 lacks complementary active sites (CAS), causing it to be adverse to nucleophilic reactions, and in contrast, the Pt 13 cluster has weakened interactions and depleted charge density from the support, resulting in the elimination of the CAS effect. A stable pyramid-structured Pt 4 also develops Lewis acid/base sites, especially on defective graphene, but the density of states is still lower than the stand-up Pt 3/G. These findings strongly demonstrate the importance and necessity of cluster active sites for catalytic reactions of polar molecules, novel three-atoms metal cluster catalysis, and the selectivity and catalytic performance in the designing of ammonia fuel cells.
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Lei H, Li X, Meng J, Zheng H, Zhang W, Cao R. Structure Effects of Metal Corroles on Energy-Related Small Molecule Activation Reactions. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00310] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Haitao Lei
- Key Laboratory of Applied Surface and Colloid Chemistry,
Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Xialiang Li
- Key Laboratory of Applied Surface and Colloid Chemistry,
Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Jia Meng
- Key Laboratory of Applied Surface and Colloid Chemistry,
Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Haoquan Zheng
- Key Laboratory of Applied Surface and Colloid Chemistry,
Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry,
Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry,
Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
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Chen X, Xu J, Chai H, Wang Y, Jia D, Zhou W. One-step synthesis of hollow chain-like nitrogen doped carbon nanotubes/iron carbide as highly efficient bifunctional oxygen electrocatalyst. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.02.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Jaouen K, Cornut R, Ausserré D, Campidelli S, Derycke V. Ideal optical contrast for 2D material observation using bi-layer antireflection absorbing substrates. NANOSCALE 2019; 11:6129-6135. [PMID: 30869677 DOI: 10.1039/c8nr09983a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The capability to observe 2D materials with optical microscopy techniques is of central importance in the development of the field and is a driving force for the assembly and study of 2D material van der Waals heterostructures. Such an observation of ultrathin materials usually benefits from antireflection conditions associated with the choice of a particular substrate geometry. The most common configuration uses a transparent oxide layer with a thickness minimizing light reflection at the air/substrate interface when light travels from air to the substrate. Backside Absorbing Layer Microscopy (BALM) is a newly proposed configuration in which light travels from glass to air (or another medium such as water or a solvent) and the antireflection layer is a light-absorbing material (typically a metal). We recently showed that this technique produces images of 2D materials with unprecedented contrast and can be ideally coupled to chemical and electrochemical experiments. Here, we show that contrast can be optimal using double-layer antireflection coatings. By following in situ and with sub-nm precision the controlled deposition of molecules, we notably establish precisely the ideal observation conditions for graphene oxide monolayers which represent one of the most challenging 2D material cases in terms of transparency and thickness. We also provide guidelines for the selection of antireflection coatings applicable to a large variety of nanomaterials. This work strengthens the potential of BALM as a generic, powerful and versatile technique for the study of molecular-scale materials and phenomena.
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Affiliation(s)
- Kevin Jaouen
- LICSEN, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France.
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32
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Zhang W. Functional graphene film macroscopic assemblies for flexible supercapacitor application. ACTA ACUST UNITED AC 2019. [DOI: 10.1088/1742-6596/1168/2/022071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Wu X, Hong G, Zhang X. Electroless Plating of Graphene Aerogel Fibers for Electrothermal and Electromagnetic Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3814-3821. [PMID: 30768281 DOI: 10.1021/acs.langmuir.8b04007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Graphene aerogel fibers (GAFs) with low density, high specific surface area, and high porosity can be used as the host material to incorporate another component and thus form multifunctional fibers, which have potential applications in wearable devices, thermoregulating apparatus, sensors, and so forth. However, the intrinsically low electric conductivity of GAFs hampers them in the fields of electrothermal heating and electromagnetic interference (EMI) shielding. Herein, we report a new aerogel fiber composed by graphene sheets and nickel nanoparticles with low density (55-192 mg/cm3), high electric conductivity (0.8 × 103 to 4.5 × 104 S/m), and high specific surface area (49-105 m2/g). The graphene/Ni aerogel fibers (GNAFs) were synthesized initially from reduced graphene oxide hydrogel fibers followed by an electroless plating process. Further investigations have demonstrated that the resulting GNAFs possess excellent electrothermal property, faster electrothermal response, high mechanical and electrical stability as the electric wire, and excellent EMI shielding performance as the composite filler. The saturated temperature of GNAFs can reach 174 °C with an applied voltage of only 5 V, and the heating rate surpasses those of commercial Kanthal and Nichrome wires about 2.1 times and 2.6 times, respectively. The EMI shielding effectiveness of GNAFs is higher than 30 dB at the long bandwidth of 12.5-20 GHz. Specifically, it can shield more than 99.99% of the incident wave at the bandwidth of 15-20 GHz.
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Affiliation(s)
- Xiaohan Wu
- Suzhou Institute of Nano-Tech and Nano-Bionics , Chinese Academy of Sciences , Suzhou 215123 , China
- University of Chinese Academy of Sciences , Beijing 10000 , China
| | - Guo Hong
- Institute of Applied Physics and Materials Engineering , University of Macau , Taipa 999078 , Macao , China
| | - Xuetong Zhang
- Suzhou Institute of Nano-Tech and Nano-Bionics , Chinese Academy of Sciences , Suzhou 215123 , China
- Department of Surgical Biotechnology, Division of Surgery & Interventional Science , University College London , London NW3 2PF , U.K
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Rendón-Patiño A, Doménech A, García H, Primo A. A reliable procedure for the preparation of graphene-boron nitride superlattices as large area (cm × cm) films on arbitrary substrates or powders (gram scale) and unexpected electrocatalytic properties. NANOSCALE 2019; 11:2981-2990. [PMID: 30698195 DOI: 10.1039/c8nr08377k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Herein, a reliable procedure for the preparation of graphene-boron nitride superlattices, either as films or powders, consisting of the pyrolysis at 900 °C of polystyrene embedded pre-formed boron nitride single sheets is reported. The procedure can serve to prepare large area films (cm × cm) of this superlattice on quartz, copper foil and ceramics. Selected area electron diffraction patterns at every location on the films show the occurrence of the graphene-boron nitride superlattice all over the film. The procedure can also be applied to the preparation of powdered samples on a gram scale. Comparison with other materials indicates that the superlattice appears spontaneously as the growing graphene sheets develop, due to the templating effect of pre-existing boron nitride single sheets. Since the characteristic boron nitride emission in the visible region is completely quenched in the superlattice configuration, it is proposed that fluorescence microscopy can be used as a routine technique to determine the occurrence of superlattice in large area films. Electrodes of this material show an unforeseen catalytic activity for oxygen reduction reaction and exhibit a decrease of the heterojunction-electrolyte interphase electrical resistance.
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Affiliation(s)
- Alejandra Rendón-Patiño
- Instituto de Tecnología Química Consejo Superior de Investigaciones Científicas-Universitat Politècnica de València, Universitat Politecnica de Valencia, Av. De los Naranjos s/n, 46022 Valencia, Spain.
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35
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Zhai LF, Kong SY, Zhang H, Tian W, Sun M, Sun H, Wang S. Facile synthesis of Co-N-rGO composites as an excellent electrocatalyst for oxygen reduction reaction. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.05.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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36
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Heidari B, Heravi MM, Nabid MR, Sedghi R, Hooshmand SE. Novel palladium nanoparticles supported on β-cyclodextrin@graphene oxide as magnetically recyclable catalyst for Suzuki-Miyaura cross-coupling reaction with two different approaches in bio-based solvents. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4632] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Bahareh Heidari
- Department of Chemistry; Alzahra University; Vanak, Tehran Iran
| | - Majid M. Heravi
- Department of Chemistry; Alzahra University; Vanak, Tehran Iran
| | - Mohammad Reza Nabid
- Department of Polymer and Materials Chemistry, Faculty of Chemistry and Petroleum Sciences; Shahid Beheshti University; GC 1983969411 Tehran Iran
| | - Roya Sedghi
- Department of Polymer and Materials Chemistry, Faculty of Chemistry and Petroleum Sciences; Shahid Beheshti University; GC 1983969411 Tehran Iran
| | - Seyyed Emad Hooshmand
- Department of Organic Chemistry and Oil, Faculty of Chemistry and Petroleum Sciences; Shahid Beheshti University; GC 1983969411 Tehran Iran
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Passaponti M, Savastano M, Clares MP, Inclán M, Lavacchi A, Bianchi A, García-España E, Innocenti M. MWCNTs-Supported Pd(II) Complexes with High Catalytic Efficiency in Oxygen Reduction Reaction in Alkaline Media. Inorg Chem 2018; 57:14484-14488. [DOI: 10.1021/acs.inorgchem.8b02695] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Maurizio Passaponti
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Matteo Savastano
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
- CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - M. Paz Clares
- Supramolecular Chemistry Group, Institute of Molecular Sciences, University of Valencia, 46980 Paterna, Spain
| | - Mario Inclán
- Supramolecular Chemistry Group, Institute of Molecular Sciences, University of Valencia, 46980 Paterna, Spain
| | | | - Antonio Bianchi
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Enrique García-España
- Supramolecular Chemistry Group, Institute of Molecular Sciences, University of Valencia, 46980 Paterna, Spain
| | - Massimo Innocenti
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
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Chen M, Hwang S, Li J, Karakalos S, Chen K, He Y, Mukherjee S, Su D, Wu G. Pt alloy nanoparticles decorated on large-size nitrogen-doped graphene tubes for highly stable oxygen-reduction catalysts. NANOSCALE 2018; 10:17318-17326. [PMID: 30198032 DOI: 10.1039/c8nr05888a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Pt alloy nanoparticles supported on Vulcan XC-72 (Pt/C) are the most effective catalysts for kinetically sluggish oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. However, significant performance degradation has been observed with the Pt/C catalysts due to agglomeration and Ostwald ripening of Pt nanoparticles largely resulting from the corrosion of carbon supports. Here, we developed a Pt alloy catalyst through annealing Pt nanoparticles deposited on nitrogen/metal co-doped large-size graphene tubes (NGTs). The in-situ formation of PtM (M: Co and Ni) alloy during the annealing process contributes to the improvement of the catalytic activity and stability. During the accelerated stress tests (AST), after 20 000 potential cycles (0.6-1.0 V vs. RHE), the retained electrochemical surface area (ECSA) of the PtM/NGT catalyst is more than 2 times larger than that of the Pt/C catalyst. As for the AST tests of carbon corrosion, after 30 000 potential cycles (1.0-1.5 V vs. RHE) at room temperature, the NGT morphologies are well maintained and no ECSA loss of this PtM catalyst is observed, indicating excellent corrosion-resistance. Even at harsher 60 °C, the PtM/NGT catalyst exhibits only insignificant loss (6 mV) of E1/2 while the Pt/C catalyst shows significant degradation (47 mV loss in E1/2). The improved stability of PtM/NGT catalyst is attributed to the highly graphitized NGTs and possible synergistic effects between the NGT carbon support and the PtM alloy nanoparticles.
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Affiliation(s)
- Mengjie Chen
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA.
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Ren G, Liu Y, Wang W, Wang M, Zhou Y, Wu S, Shen J. Facilitated Utilization of Active Sites with Core‐Shell PdPt@Pt/RGO Nanocluster Structures for Improved Electrocatalytic Ethylene Glycol Oxidation. ChemElectroChem 2018. [DOI: 10.1002/celc.201800436] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Guohong Ren
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing University 163 Xianlin Avenue, Qixia District Nanjing 210023 China
| | - Yajun Liu
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing University 163 Xianlin Avenue, Qixia District Nanjing 210023 China
| | - Weigang Wang
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing University 163 Xianlin Avenue, Qixia District Nanjing 210023 China
| | - Mingqian Wang
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing University 163 Xianlin Avenue, Qixia District Nanjing 210023 China
| | - Yang Zhou
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing University 163 Xianlin Avenue, Qixia District Nanjing 210023 China
| | - Shishan Wu
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing University 163 Xianlin Avenue, Qixia District Nanjing 210023 China
| | - Jian Shen
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing University 163 Xianlin Avenue, Qixia District Nanjing 210023 China
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40
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Chen C, Xu W, Tang C, Li Y, Xu L. Unravelling the interface of Co–Pi/Ag/Fe2O3 and Ni–Pi/Ag/Fe2O3 heterostructures for enhanced solar water splitting. MOLECULAR SIMULATION 2018. [DOI: 10.1080/08927022.2018.1511900] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Chongyang Chen
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, People’s Republic of China
| | - Weiwei Xu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, People’s Republic of China
| | - Chao Tang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, People’s Republic of China
| | - Youyong Li
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, People’s Republic of China
| | - Lai Xu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, People’s Republic of China
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41
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Wang Q, Zhang Z, Wang M, Liu F, Jiang L, Hong B, Li J, Lai Y. Bioinspired fiber-like porous Cu/N/C electrocatalyst facilitating electron transportation toward oxygen reaction for metal-air batteries. NANOSCALE 2018; 10:15819-15825. [PMID: 30102312 DOI: 10.1039/c8nr03981j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Laccase is one of the most effective biocatalysts for oxygen reduction under physiological conditions. Its unique Cu- and N-based active sites with direct electrical pathways for electrons can guarantee rapid oxygen exchange and reduction. Inspired by this specific structure, we designed and fabricated porous fiber-like Cu/N/C based on MOFs as an ORR catalyst. Precision morphology control of fibers contributed to an increase in the electron transport rate compared with that of Cu/N/C nanoparticles, which could minimize interparticle ohmic contacts and provide direct electrical pathways along with sufficient active sites to catalyze oxygen reduction. The designed Cu/N/C catalyst exhibited similar electrochemical activity to that of a commercially available 20 wt% Pt/C ORR catalyst. Moreover, after being employed as the cathode of aluminium-air batteries, the catalyst outperformed a commercial 5 wt% Pt/C catalyst.
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Affiliation(s)
- Qiyu Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China.
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42
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Lozano T, Rankin RB. Computational predictive design for metal-decorated-graphene size-specific subnanometer to nanometer ORR catalysts. Catal Today 2018. [DOI: 10.1016/j.cattod.2018.04.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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43
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Wu X, Lyu J, Hong G, Liu XC, Zhang X. Inner Surface-Functionalized Graphene Aerogel Microgranules with Static Microwave Attenuation and Dynamic Infrared Shielding. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9004-9014. [PMID: 29958495 DOI: 10.1021/acs.langmuir.8b01410] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bulk graphene aerogels with high electrical conductivity, ultralow density, and high specific surface area have attracted significant attention because of their fascinating performances in energy storage, catalysis, absorption, sensor, electromagnetic shielding, etc. However, graphene aerogel microgranules (i.e., reducing the size of the bulk aerogels into microscale) and their performances in the electromagnetic field have been ignored. Herein, we report a new strategy to make floatable graphene aerogel microgranules with high hydrophobicity (137°), low density (13.5 mg/cm3), and high specific surface area (516 m2/g). These microgranules were synthesized initially from reduced graphene oxide (rGO) hydrogel microparticles and then in situ-modified by silica nanoparticles. Further investigations have demonstrated that the resulting silica-modified rGO aerogel microgranules possess highly efficient static electromagnetic screening (average 30.3 dB in 8-18 GHz) and dynamic infrared shielding (higher than 10 dB during floatation in air for 15 min) properties. The work reported here should give much inspiration to make more functional aerogel microgranules used in various emerging fields.
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Affiliation(s)
- Xiaohan Wu
- Suzhou Institute of Nano-Tech and Nano-Bionics , Chinese Academy of Sciences , Suzhou 215123 , P. R. China
- University of Chinese Academy of Sciences , Beijing 10000 , P. R. China
| | - Jing Lyu
- Suzhou Institute of Nano-Tech and Nano-Bionics , Chinese Academy of Sciences , Suzhou 215123 , P. R. China
| | - Guo Hong
- Institute of Applied Physics and Materials Engineering , University of Macau , Macao N/A , P. R. China
| | - Xiang-Cui Liu
- Research Institute of Chemical Defence , Beijing 102205 , P. R. China
| | - Xuetong Zhang
- Suzhou Institute of Nano-Tech and Nano-Bionics , Chinese Academy of Sciences , Suzhou 215123 , P. R. China
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44
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Wang S, Teng Z, Wang C, Wang G. Stable and Efficient Nitrogen-Containing Carbon-Based Electrocatalysts for Reactions in Energy-Conversion Systems. CHEMSUSCHEM 2018; 11:2267-2295. [PMID: 29770593 DOI: 10.1002/cssc.201800509] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 04/21/2018] [Indexed: 05/14/2023]
Abstract
High activity and stability are crucial for the practical use of electrocatalysts in fuel cells, metal-air batteries, and water electrolysis, including the oxygen reduction reaction, hydrogen evolution reaction, oxygen evolution reaction, and oxidation reactions of formic acid and alcohols. Electrocatalysts based on nitrogen-containing carbon (N-C) materials show promise in catalyzing these reactions; however, there is no systematic review of strategies for the engineering of active and stable N-C-based electrocatalysts. Herein, a comprehensive comparison of recently reported N-C-based electrocatalysts regarding both electrocatalytic activity and long-term stability is presented. In the first part of this review, the relationships between the electrocatalytic reactions and selection of the element to modify the N-C-based materials are discussed. Afterwards, synthesis methods for N-C-based electrocatalysts are summarized, and strategies for the synthesis of highly stable N-C-based electrocatalysts are presented. Multiple tables containing data on crucial parameters for both electrocatalytic activity and stability are displayed in this review. Finally, constructing M-Nx moieties is proposed as the most promising engineering strategy for stable N-C-based electrocatalysts.
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Affiliation(s)
- Sicong Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Zhengyuan Teng
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Chengyin Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Guoxiu Wang
- Center for Clean Energy Technology, Faculty of Science, University of Technology Sydney, Broadway, Sydney, NSW, 2007, Australia
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45
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Fernandes DM, Novais HC, Bacsa R, Serp P, Bachiller-Baeza B, Rodríguez-Ramos I, Guerrero-Ruiz A, Freire C. Polyoxotungstate@Carbon Nanocomposites As Oxygen Reduction Reaction (ORR) Electrocatalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6376-6387. [PMID: 29768921 DOI: 10.1021/acs.langmuir.8b00299] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The oxygen reduction reaction (ORR) has a crucial function as the cathode reaction in energy-converting systems, such as fuel cells (FCs), which contributes to a sustainable energy supply. However, the current use of precious Pt-based electrocatalysts (ECs) is a major drawback for the economic viability of fuel cells. Hence, it is urgent to develop cost-effective and efficient electrocatalysts (ECs) without noble metals to substitute the Pt-based ECs. Herein, we report the preparation and application as ORR electrocatalysts of four new nanocomposites based on sandwich-type phosphotungstate (TBA)7H3[Co4(H2O)2(PW9O34)2] (TBA-Co4(PW9)2) immobilized onto different carbon nanomaterials [single-walled carbon nanotubes (SWCNT), graphene flakes (GF), carbon nanotubes doped with nitrogen (N-CNT), and nitrogen-doped few layer graphene (N-FLG)]. In alkaline medium, the four nanocomposites studied presented comparable onset potentials (0.77-0.90 V vs RHE), which are similar to that observed for Pt/C (0.91 V vs RHE). Higher diffusion-limiting current densities ( jL,0.26V,1600 rpm = -168.3 mA cm-2 mg-1) were obtained for Co4(PW9)2@N-CNT, as compared to Pt/C electrode -130.0 mA cm-2 mg-1) and the other ECs (-45.0, -50.7, and -87.5 mA cm-2 mg-1 for Co4(PW9)2@SWCNT, Co4(PW9)2@GF, and Co4(PW9)2@N-FLG, respectively). All the Co4(PW9)2@CM ECs showed selectivity toward direct O2 reduction to water with the exception of Co4(PW9)2@GF where a mixture of the 2- and 4-electron mechanisms is observed. Furthermore, low Tafel slopes were obtained for all the nanocomposites (68-96 mV dec-1). Co4(PW9)2@CM ECs also showed excellent tolerance to methanol with no significant changes in current density, in contrast to Pt/C (decrease of ≈59% after methanol addition) and good long-term electrochemical stability with current retentions between 75 and 84%.
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Affiliation(s)
- Diana M Fernandes
- REQUIMTE/Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade do Porto , 4169-007 Porto , Portugal
| | - Hugo C Novais
- REQUIMTE/Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade do Porto , 4169-007 Porto , Portugal
| | - Revathi Bacsa
- Laboratoire de Chimie de Coordination UPR CNRS 8241, Composante ENSIACET , Université Toulouse , 4 allée Emile Monso , 31030 Toulouse , France
| | - Philippe Serp
- Laboratoire de Chimie de Coordination UPR CNRS 8241, Composante ENSIACET , Université Toulouse , 4 allée Emile Monso , 31030 Toulouse , France
| | - Belén Bachiller-Baeza
- Instituto de Catálisis y Petroleoquímica, CSIC , C/Marie Curie 2, Cantoblanco , 28049 Madrid , Spain
| | | | - Antonio Guerrero-Ruiz
- Departamento de Química Inorgánica y Química Técnica, Facultad de Ciencias , UNED , Senda de Rey 9 , 28040 Madrid , Spain
| | - Cristina Freire
- REQUIMTE/Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade do Porto , 4169-007 Porto , Portugal
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46
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Sun Y, Jiang B, Liao F, Liu L, Shao M. Platinum-Decorated Si Nanowires as Methanol-Tolerant Oxygen Reduction Electrocatalysts. ChemistrySelect 2018. [DOI: 10.1002/slct.201703147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Yuyang Sun
- Institute of Functional Nano & Soft Materials (FUNSOM); Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices; Soochow University, Suzhou; 215123 Jiangsu, PR China
| | - Binbin Jiang
- Institute of Functional Nano & Soft Materials (FUNSOM); Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices; Soochow University, Suzhou; 215123 Jiangsu, PR China
| | - Fan Liao
- Institute of Functional Nano & Soft Materials (FUNSOM); Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices; Soochow University, Suzhou; 215123 Jiangsu, PR China
| | - Liangbin Liu
- Institute of Functional Nano & Soft Materials (FUNSOM); Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices; Soochow University, Suzhou; 215123 Jiangsu, PR China
| | - Mingwang Shao
- Institute of Functional Nano & Soft Materials (FUNSOM); Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices; Soochow University, Suzhou; 215123 Jiangsu, PR China
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47
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Synergistic Effect of Nitrogen Doping and MWCNT Intercalation for the Graphene Hybrid Support for Pt Nanoparticles with Exemplary Oxygen Reduction Reaction Performance. MATERIALS 2018; 11:ma11040642. [PMID: 29690564 PMCID: PMC5951526 DOI: 10.3390/ma11040642] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 04/18/2018] [Accepted: 04/20/2018] [Indexed: 11/17/2022]
Abstract
The potential of graphene–multi-walled-carbon nanotube (G-M) hybrids prepared by the one-pot modified Hummers method followed by thermal annealing has been demonstrated by employing one as an electrocatalyst support for oxygen reduction reaction (ORR). N doping effectively modified the electronic structure of the G-M hybrid support, which was beneficial for the uniform distribution of Pt nanoparticles, and ORR activities were further improved. The newly prepared Pt/N-G-M catalyst demonstrated higher electrochemical activity than Pt/G-M and Pt/G catalysts. Even compared with commercial 20 wt % Pt/C (JM20), Pt/N-G-M delivered a better half-wave potential and mass activity. In terms of the durability test, Pt/N-G-M maintained 72.7% of its initial electrochemical active surface area (ECSA) after 2000 repeated potential cycles between 0 and 1.2 V in acidic media in relation to the 44.4% retention for JM20. Moreover, the half-wave potential for Pt/N-G-M showed only a minimal change, significantly superior to the 139 mV of loss for JM20. It is expected that Pt/N-G-M can be the potential candidate as a highly efficient and durable catalyst if utilized in proton exchange membrane fuel cells (PEMFCs).
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48
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Fu S, Zhu C, Su D, Song J, Yao S, Feng S, Engelhard MH, Du D, Lin Y. Porous Carbon-Hosted Atomically Dispersed Iron-Nitrogen Moiety as Enhanced Electrocatalysts for Oxygen Reduction Reaction in a Wide Range of pH. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1703118. [PMID: 29430838 DOI: 10.1002/smll.201703118] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 12/18/2017] [Indexed: 05/28/2023]
Abstract
As one of the alternatives to replace precious metal catalysts, transition-metal-nitrogen-carbon (M-N-C) electrocatalysts have attracted great research interest due to their low cost and good catalytic activities. Despite nanostructured M-N-C catalysts can achieve good electrochemical performances, they are vulnerable to aggregation and insufficient catalytic sites upon continuous catalytic reaction. In this work, metal-organic frameworks derived porous single-atom electrocatalysts (SAEs) were successfully prepared by simple pyrolysis procedure without any further posttreatment. Combining the X-ray absorption near-edge spectroscopy and electrochemical measurements, the SAEs have been identified with superior oxygen reduction reaction (ORR) activity and stability compared with Pt/C catalysts in alkaline condition. More impressively, the SAEs also show excellent ORR electrocatalytic performance in both acid and neutral media. This study of nonprecious catalysts provides new insights on nanoengineering catalytically active sites and porous structures for nonprecious metal ORR catalysis in a wide range of pH.
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Affiliation(s)
- Shaofang Fu
- School of Mechanical and Materials Engineering, Washington State University, WA, 99164, USA
| | - Chengzhou Zhu
- School of Mechanical and Materials Engineering, Washington State University, WA, 99164, USA
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry Central China Normal University, Wuhan, 430079, P. R. China
| | - Dong Su
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Junhua Song
- School of Mechanical and Materials Engineering, Washington State University, WA, 99164, USA
| | - Siyu Yao
- Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Shuo Feng
- School of Mechanical and Materials Engineering, Washington State University, WA, 99164, USA
| | - Mark H Engelhard
- Environmental Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Dan Du
- School of Mechanical and Materials Engineering, Washington State University, WA, 99164, USA
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry Central China Normal University, Wuhan, 430079, P. R. China
| | - Yuehe Lin
- School of Mechanical and Materials Engineering, Washington State University, WA, 99164, USA
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49
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Zou X, Wang L, Yakobson BI. Mechanisms of the oxygen reduction reaction on B- and/or N-doped carbon nanomaterials with curvature and edge effects. NANOSCALE 2018; 10:1129-1134. [PMID: 29271465 DOI: 10.1039/c7nr08061a] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Despite recent increased research interest in hetero-atom (B and/or N) doping effects on the oxygen reduction reaction (ORR) performance of carbon nanomaterials, microscopic understanding of active catalytic sites and effects of B and/or N doping has not been conclusively reached. Here, through comparative first-principles simulations between BN codoping and isolated B or N doping in both graphene nanoribbons (GNRs) and carbon nanotubes (CNTs), we not only identify active sites in these doped carbon nanomaterials, but elucidate the underlying mechanism of ORR processes. While the distortion of C-C bonds in CNTs leads to strong binding of O2, spin density distribution along the edges plays a key role in enhancing the adsorption strength of O2 on GNRs. The effective adsorption of O2 facilitates the following elementary reduction reactions. Based on thermodynamic analyses, O2 adsorption as well as the electron and proton transfer to O atom are identified as key rate-determining steps. For CNTs, a good linear scaling is found between the adsorption energies of key intermediate products and that of atomic O, and thus the latter serves as a good descriptor for ORR activities. Further, N-doped high-quality CNTs are shown to exhibit best performance. For GNRs, due to edge effects, the linear relationship is broken, which promotes the catalytic activities in the BN codoping case. These findings resolve the long-standing controversy on the synergetic effects of B and N codoping, which deepens our understanding of the reaction mechanism. This work might further facilitate the optimization of the doping strategies for high-efficiency carbon-based ORR catalysts.
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Affiliation(s)
- Xiaolong Zou
- Department of Materials Science and NanoEngineering, Department of Chemistry, and the Smalley Institute for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, USA.
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50
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Zhang P, Hu Q, Yang X, Hou X, Mi J, Liu L, Dong M. Size effect of oxygen reduction reaction on nitrogen-doped graphene quantum dots. RSC Adv 2018. [DOI: 10.1039/c7ra10104j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The adsorption strength of ORR intermediates, the reaction free energy of rate-determining step, and the overpotential increase with the increase of the size of N-doped graphene quantum dots.
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Affiliation(s)
- Peng Zhang
- Institute for Advanced Materials
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Qiang Hu
- Institute for Advanced Materials
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Xuejing Yang
- Institute for Advanced Materials
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Xiuli Hou
- Institute for Advanced Materials
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Jianli Mi
- Institute for Advanced Materials
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Lei Liu
- Institute for Advanced Materials
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Mingdong Dong
- Center for DNA Nanotechnology (CDNA)
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Aarhus DK-8000
- Denmark
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