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Torres-Pinto A, Velo-Gala I, Ribeirinho-Soares S, Nunes OC, Silva CG, Faria JL, Silva AMT. Novel photoelectrochemical 3D-system for water disinfection by deposition of modified carbon nitride on vitreous carbon foam. ENVIRONMENTAL RESEARCH 2023; 237:117019. [PMID: 37652219 DOI: 10.1016/j.envres.2023.117019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/14/2023] [Accepted: 08/28/2023] [Indexed: 09/02/2023]
Abstract
Graphitic carbon nitride (GCN) is an optical semiconductor with excellent photoactivity under visible light irradiation. It has been widely applied for organic micropollutant removal from contaminated water, and less investigated for microorganisms' inactivation. The photocatalytic degradation mechanism using GCN is attributed to a series of reactions with reactive oxygen species and photogenerated holes that can be boosted by modifying its physical-chemical structure. This work reports a successful improvement of the overall photocatalytic and electrocatalytic activities of the pristine material by thermal and chemical modification by a copolymerisation synthesis method. The copolymerisation of dicyandiamide as a precursor with barbituric acid strongly reduced photoluminescence due to the enhanced charge separation thus improving the catalyst efficiency under visible light irradiation. The material with 1.6 wt% of barbituric acid showed the best photocatalytic performance and electrochemical properties. This photocatalyst was selected for immobilisation on a conductive carbon foam, which promotes a higher electrochemical active surface area and enhanced mass transfer. This three-dimensional metal-free electrode was employed for the photoelectrochemical inactivation of two different microorganisms, Escherichia coli, and Enterococcus faecalis, obtaining removals below the detection limit after 30 min in simulated faecal-contaminated waters. This photoelectrochemical reactor was also applied to treat polluted river and urban waste waters, and the faecal contamination indicators were vastly reduced to values below the detection limit in 60 min in both cases, showing the wide applicability of this innovative photoelectrode for different types of polluted aqueous matrices.
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Affiliation(s)
- André Torres-Pinto
- LSRE-LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Inmaculada Velo-Gala
- LSRE-LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; Department of Inorganic and Organic Chemistry, Faculty of Experimental Sciences, Jaén University, 23071, Jaén, Spain.
| | - Sara Ribeirinho-Soares
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Olga C Nunes
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Cláudia G Silva
- LSRE-LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Joaquim L Faria
- LSRE-LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Adrián M T Silva
- LSRE-LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
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2
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Ansari MN, Sarrouf S, Ehsan MF, Manzoor S, Ashiq MN, Alshawabkeh AN. Polarity reversal for enhanced in-situ electrochemical synthesis of H 2O 2 over banana-peel derived biochar cathode for water remediation. Electrochim Acta 2023; 453:142351. [PMID: 37213869 PMCID: PMC10198125 DOI: 10.1016/j.electacta.2023.142351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
The fabrication of a cost-efficient cathode is critical for in-situ electrochemical generation of hydrogen peroxide (H2O2) to remove persistent organic pollutants from groundwater. Herein, we tested a stainless-steel (SS) mesh wrapped banana-peel derived biochar (BB) cathode for in-situ H2O2 electrogeneration to degrade bromophenol blue (BPB) and Congo red (CR) dyes. Furthermore, polarity reversal is evaluated for the activation of BB surface via introduction of various oxygen containing functionalities that serve as active sites for the oxygen reduction reaction (ORR) to generate H2O2. Various parameters including the BB mass, current, as well as the solution pH have been optimized to evaluate the cathode performance for efficient H2O2 generation. The results reveal formation of up to 9.4 mg/L H2O2 using 2.0 g BB and 100 mA current in neutral pH with no external oxygen supply with a manganese doped tin oxide deposited nickel foam (Mn-SnO2@NF) anode to facilitate the oxygen evolution reaction (OER). This iron-free electrofenton (EF) like process enabled by the SSBB cathode facilitates efficient degradation of BPB and CR dyes with 87.44 and 83.63% removal efficiency, respectively after 60 min. A prolonged stability test over 10 cycles demonstrates the effectiveness of polarity reversal toward continued removal efficiency as an added advantage. Moreover, Mn-SnO2@NF anode used for the OER was also replaced with stainless steel (SS) mesh anode to investigate the effect of oxygen evolution on H2O2 generation. Although Mn-SnO2@NF anode exhibits better oxygen evolution potential with reduced Tafel slope, SS mesh anode is discussed to be more cost-efficient for further studies.
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Affiliation(s)
- Mohammad Numair Ansari
- Institute of Chemical Sciences (ICS), Bahauddin Zakariya University (BZU), Multan, Punjab 60800, Pakistan
| | - Stephanie Sarrouf
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA
| | - Muhammad Fahad Ehsan
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA
| | - Sumaira Manzoor
- Institute of Chemical Sciences (ICS), Bahauddin Zakariya University (BZU), Multan, Punjab 60800, Pakistan
| | - Muhammad Naeem Ashiq
- Institute of Chemical Sciences (ICS), Bahauddin Zakariya University (BZU), Multan, Punjab 60800, Pakistan
| | - Akram N. Alshawabkeh
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA
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3
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Maureira D, Romero O, Illanes A, Wilson L, Ottone C. Industrial bioelectrochemistry for waste valorization: State of the art and challenges. Biotechnol Adv 2023; 64:108123. [PMID: 36868391 DOI: 10.1016/j.biotechadv.2023.108123] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 02/24/2023] [Accepted: 02/26/2023] [Indexed: 03/05/2023]
Abstract
Bioelectrochemistry has gained importance in recent years for some of its applications on waste valorization, such as wastewater treatment and carbon dioxide conversion, among others. The aim of this review is to provide an updated overview of the applications of bioelectrochemical systems (BESs) for waste valorization in the industry, identifying current limitations and future perspectives of this technology. BESs are classified according to biorefinery concepts into three different categories: (i) waste to power, (ii) waste to fuel and (iii) waste to chemicals. The main issues related to the scalability of bioelectrochemical systems are discussed, such as electrode construction, the addition of redox mediators and the design parameters of the cells. Among the existing BESs, microbial fuel cells (MFCs) and microbial electrolysis cells (MECs) stand out as the more advanced technologies in terms of implementation and R&D investment. However, there has been little transfer of such achievements to enzymatic electrochemical systems. It is necessary that enzymatic systems learn from the knowledge reached with MFC and MEC to accelerate their development to achieve competitiveness in the short term.
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Affiliation(s)
- Diego Maureira
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso, Chile
| | - Oscar Romero
- Bioprocess Engineering and Applied Biocatalysis Group, Departament of Chemical, Biological and Enviromental Engineering, Universitat Autònoma de Barcelona, 08193, Spain.
| | - Andrés Illanes
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso, Chile
| | - Lorena Wilson
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso, Chile
| | - Carminna Ottone
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso, Chile.
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4
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An J, Feng Y, Zhao Q, Wang X, Liu J, Li N. Electrosynthesis of H 2O 2 through a two-electron oxygen reduction reaction by carbon based catalysts: From mechanism, catalyst design to electrode fabrication. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2022; 11:100170. [PMID: 36158761 PMCID: PMC9488048 DOI: 10.1016/j.ese.2022.100170] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 03/24/2022] [Accepted: 03/24/2022] [Indexed: 06/15/2023]
Abstract
Hydrogen peroxide (H2O2) is an efficient oxidant with multiple uses ranging from chemical synthesis to wastewater treatment. The in-situ H2O2 production via a two-electron oxygen reduction reaction (ORR) will bring H2O2 beyond its current applications. The development of carbon materials offers the hope for obtaining inexpensive and high-performance alternatives to substitute noble-metal catalysts in order to provide a full and comprehensive picture of the current state of the art treatments and inspire new research in this area. Herein, the most up-to-date findings in theoretical predictions, synthetic methodologies, and experimental investigations of carbon-based catalysts are systematically summarized. Various electrode fabrication and modification methods were also introduced and compared, along with our original research on the air-breathing cathode and three-phase interface theory inside a porous electrode. In addition, our current understanding of the challenges, future directions, and suggestions on the carbon-based catalyst designs and electrode fabrication are highlighted.
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Affiliation(s)
- Jingkun An
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China
| | - Yujie Feng
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Qian Zhao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China
| | - Xin Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China
| | - Jia Liu
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China
| | - Nan Li
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China
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5
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Kinetic study of Ga electrodeposition on different configuration of Cu cathodes. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Vasconcelos VM, Santos GOS, Eguiluz KIB, Salazar-Banda GR, de Fatima Gimenez I. Recent advances on modified reticulated vitreous carbon for water and wastewater treatment - A mini-review. CHEMOSPHERE 2022; 286:131573. [PMID: 34303050 DOI: 10.1016/j.chemosphere.2021.131573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 07/09/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
Recently, modifications on reticulated vitreous carbon (RVC) have attracted attention as a promising strategy to produce low-cost, stable, and highly active electrodes leading to significant advances in the water/wastewater treatment field compared with raw RVC. Modified RVC materials have been used as cathode, anode, and membrane. Improvements on physical and electrocatalytic properties are achieved by RVC modification via diverse strategies, including the deposition of metal oxides, the introduction of surface functional groups, and the formation of composites, which were used to remove organic contaminants and pathogens from water matrices, as summarized in this mini-review. This mini-review mainly focused on papers published from 2015 to 2020 that reported modified RVC electrodes to eliminate pollutants and pathogens from water matrices by electrochemical advanced oxidation processes. Likewise, news challenges and opportunities are discussed, and perspectives for the ongoing and future studies in this research field are also given.
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Affiliation(s)
- Vanessa M Vasconcelos
- Programa de Pós-Graduação em Química, Universidade Federal de Sergipe, 49100-000, São Cristóvão, SE, Brazil
| | - Géssica O S Santos
- Laboratório de Eletroquímica e Nanotecnologia - LEN, Instituto de Tecnologia e Pesquisa - ITP, 49032-490, Aracaju, Sergipe, Brazil
| | - Katlin I B Eguiluz
- Laboratório de Eletroquímica e Nanotecnologia - LEN, Instituto de Tecnologia e Pesquisa - ITP, 49032-490, Aracaju, Sergipe, Brazil; Programa de Pós-graduação em Engenharia de Processos, Universidade Tiradentes - UNIT, 49032-490, Aracaju, Sergipe, Brazil.
| | - Giancarlo R Salazar-Banda
- Laboratório de Eletroquímica e Nanotecnologia - LEN, Instituto de Tecnologia e Pesquisa - ITP, 49032-490, Aracaju, Sergipe, Brazil; Programa de Pós-graduação em Engenharia de Processos, Universidade Tiradentes - UNIT, 49032-490, Aracaju, Sergipe, Brazil
| | - Iara de Fatima Gimenez
- Programa de Pós-Graduação em Química, Universidade Federal de Sergipe, 49100-000, São Cristóvão, SE, Brazil.
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7
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Mirehbar S, Fernández-Velayos S, Mazario E, Menéndez N, Herrasti P, Recio F, Sirés I. Evidence of cathodic peroxydisulfate activation via electrochemical reduction at Fe(II) sites of magnetite-decorated porous carbon: Application to dye degradation in water. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115807] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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8
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Kang Z, Wang Y, Yang C, Xu B, Wang L, Zhu Z. Multifunctional N and O co-doped 3D carbon aerogel as a monolithic electrode for either enzyme immobilization, oxygen reduction and showing supercapacitance. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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9
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Mélinon P. Vitreous Carbon, Geometry and Topology: A Hollistic Approach. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1694. [PMID: 34203303 PMCID: PMC8305563 DOI: 10.3390/nano11071694] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/17/2021] [Accepted: 06/21/2021] [Indexed: 01/05/2023]
Abstract
Glass-like carbon (GLC) is a complex structure with astonishing properties: isotropic sp2 structure, low density and chemical robustness. Despite the expanded efforts to understand the structure, it remains little known. We review the different models and a physical route (pulsed laser deposition) based on a well controlled annealing of the native 2D/3D amorphous films. The many models all have compromises: neither all bad nor entirely satisfactory. Properties are understood in a single framework given by topological and geometrical properties. To do this, we present the basic tools of topology and geometry at a ground level for 2D surface, graphene being the best candidate to do this. With this in mind, special attention is paid to the hyperbolic geometry giving birth to triply periodic minimal surfaces. Such surfaces are the basic tools to understand the GLC network architecture. Using two theorems (the classification and the uniformisation), most of the GLC properties can be tackled at least at a heuristic level. All the properties presented can be extended to 2D materials. It is hoped that some researchers may find it useful for their experiments.
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Affiliation(s)
- Patrice Mélinon
- Université de Lyon, F-69000 Lyon, France;
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CEDEX, F69622 Villeurbanne, France
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10
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Dauda M, Basheer C, Al-Malack MH, Siddiqui MN. Efficient Co-MoS2 electrocatalyst for cathodic degradation of halogenated disinfection by-products in water sample. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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11
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Zhou W, Li F, Su Y, Li J, Chen S, Xie L, Wei S, Meng X, Rajic L, Gao J, Alshawabkeh AN. O-doped Graphitic Granular Biochar Enables Pollutants Removal via Simultaneous H 2O 2 Generation and Activation in Neutral Fe-free Electro-Fenton Process. Sep Purif Technol 2021; 262. [PMID: 34366698 DOI: 10.1016/j.seppur.2021.118327] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
H2O2 generation by 2-electron oxygen electroreduction reaction (2eORR) has attracted great attention as an alternative to the industry-dominant anthraquinone process. Electro-Fenton (EF) process, which relies on the H2O2 electrogeneration, is regarded as an important environmental application of H2O2 generation by 2eORR. However, its application is hindered by the relatively expensive electrode materials. Proposing cathode materials with low cost and facile synthetic procedures are the priority to advance the EF process. In this work, a composite cathode structure that uses graphitic granular bamboo-based biochar (GB) and stainless steel (SS) mesh (GBSS) is proposed, where SS mesh functions as current distributor and GB supports synergistic H2O2 electrogeneration and activation. The graphitic carbon makes GB conductive and the oxygen-containing groups serve as active sites for H2O2 production. 11.3 mg/L H2O2 was produced from 2.0 g GB at 50 mA after 50 min under neutral pH without external O2/air supply. The O-doped biochar further increased the H2O2 yield to 18.3 mg/L under same conditions. The GBSS electrode is also effective for H2O2 activation to generate ·OH, especially under neutral pH. Ultimately, a neutral Fe-free EF process enabled by GBSS cathode is effective for removal of various model organic pollutants (reactive blue 19, orange II, 4-nitrophenol) within 120 min, and for their partial mineralization (48.4% to 63.5%). Long-term stability of the GBSS electrode for H2O2 electrogeneration, H2O2 activation, and pollutants degradation were also examined and analyzed. This work offers a promising application for biomass waste for removals of organic pollutants in neutral Fe-free EF process.
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Affiliation(s)
- Wei Zhou
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 P. R. China.,Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, 02115 USA
| | - Feng Li
- School of Civil Engineering, South China University of Technology, Guangzhou, 510640, P. R.China
| | - Yanlin Su
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 P. R. China
| | - Junfeng Li
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 P. R. China
| | - Shuai Chen
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 P. R. China
| | - Liang Xie
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 P. R. China
| | - Siyu Wei
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 P. R. China
| | - Xiaoxiao Meng
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 P. R. China
| | - Ljiljana Rajic
- Pioneer Valley Coral & Natural Science Institute, 1 Mill Valley Road, Hadley, MA, 01035 USA
| | - Jihui Gao
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 P. R. China
| | - Akram N Alshawabkeh
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, 02115 USA
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12
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Cornejo OM, Sirés I, Nava JL. Electrosynthesis of hydrogen peroxide sustained by anodic oxygen evolution in a flow-through reactor. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114419] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Acuña NT, Güiza-Argüello V, Córdoba-Tuta E. Reticulated Vitreous Carbon Foams from Sucrose: Promising Materials for Bone Tissue Engineering Applications. Macromol Res 2020. [DOI: 10.1007/s13233-020-8128-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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14
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Influence of different 3-D electrodes towards the performance of gold recovery by using an electrogenerative process. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2017.11.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Folgueiras-Amador AA, Teuten AE, Pletcher D, Brown RCD. A design of flow electrolysis cell for ‘Home’ fabrication. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00019a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Optimising the performance of a simple electrolysis flow cell design in recycle mode; application to selective anodic and cathodic electrosyntheses.
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Affiliation(s)
| | - Alex E. Teuten
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
| | - Derek Pletcher
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
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16
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Wang Q, Daoud WA. Reaction kinetics of cerium on glassy carbon with in situ electrochemical treatment for cerium-based flow battery. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.05.083] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Kim MJ, Seo Y, Cruz MA, Wiley BJ. Metal Nanowire Felt as a Flow-Through Electrode for High-Productivity Electrochemistry. ACS NANO 2019; 13:6998-7009. [PMID: 31084021 DOI: 10.1021/acsnano.9b02058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Flow-through electrodes such as carbon paper are used in redox flow batteries, water purification, and electroorganic syntheses. This work examines the extent to which reducing the size of the fibers to the nanoscale in a flow-through electrode can increase the productivity of electrochemical processes. A Cu nanowire felt, made from nanowires 45 times smaller than the 10 μm wide fibers in carbon paper, can achieve a productivity 278 times higher than carbon paper for mass-transport-limited reduction of Cu ions. Higher increases in productivity were predicted for the Cu nanowire felt based on the mass-transport-limited current, but Cu ion reduction became charge transfer-limited on Cu nanowire felt at high concentrations and flow rates when the mass-transport-limited current became comparable to the charge transfer-limited current. In comparison, the reaction rate on carbon paper was mass-transport-limited under all concentrations and flow rates because its mass-transport-limited current was much lower than its charge transfer-limited current. Higher volumetric productivities were obtained for the Cu nanowire felt by switching from Cu ion reduction to Alizarin Red S (ARS) reduction, which has a higher reaction rate constant. An electroorganic intramolecular cyclization reaction with Cu nanowire felt achieved a productivity 4.2 times higher than that of carbon paper, although this reaction was also affected by charge transfer kinetics. This work demonstrates that large gains in productivity can be achieved with nanostructured flow-through electrodes, but the potential gains can be limited by the charge transfer kinetics of a reaction.
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Affiliation(s)
- Myung Jun Kim
- Department of Chemistry , Duke University , 124 Science Drive , Box 90354, Durham , North Carolina 27708 , United States
| | - Youngran Seo
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Mutya A Cruz
- Department of Chemistry , Duke University , 124 Science Drive , Box 90354, Durham , North Carolina 27708 , United States
| | - Benjamin J Wiley
- Department of Chemistry , Duke University , 124 Science Drive , Box 90354, Durham , North Carolina 27708 , United States
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19
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Lacasa E, Cañizares P, Walsh FC, Rodrigo MA, Ponce-de-León C. Removal of methylene blue from aqueous solutions using an Fe2+ catalyst and in-situ H2O2 generated at gas diffusion cathodes. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.218] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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20
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21
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Mohd Suah FB, Teh BP, Mansor N, Hamzah HH, Mohamed N. A closed-loop electrogenerative recycling process for recovery of silver from a diluted cyanide solution. RSC Adv 2019; 9:31753-31757. [PMID: 35527948 PMCID: PMC9072640 DOI: 10.1039/c9ra05557f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 10/01/2019] [Indexed: 11/27/2022] Open
Abstract
A closed-loop process for the complete recovery of silver from a diluted silver cyanide solution has been constructed based on an electrogenerative process. It was shown that the reduction of silver was a mass transport controlled process. Under optimal experimental conditions, 100% of silver was recovered from 500 mg L−1 and 100 mg L−1 silver cyanide solutions by using a reticulated vitreous electrode (RVC) as the cathode. The cyanide solution was recycled and reused so that a closed-loop process was obtained. In addition, the RVC in this study can be used repeatedly up to 10 cycles with a calculated relative standard deviation of 1.90%. A closed-loop process for the complete recovery of silver from a diluted silver cyanide solution has been constructed based on an electrogenerative process.![]()
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Affiliation(s)
- Faiz Bukhari Mohd Suah
- Electrogenerative Research Unit
- School of Chemical Sciences
- Universiti Sains Malaysia
- 11800 Minden
- Malaysia
| | - Bee Ping Teh
- Electrogenerative Research Unit
- School of Chemical Sciences
- Universiti Sains Malaysia
- 11800 Minden
- Malaysia
| | - Nadia Mansor
- Electrogenerative Research Unit
- School of Chemical Sciences
- Universiti Sains Malaysia
- 11800 Minden
- Malaysia
| | - Hairul Hisham Hamzah
- Electrogenerative Research Unit
- School of Chemical Sciences
- Universiti Sains Malaysia
- 11800 Minden
- Malaysia
| | - Norita Mohamed
- Electrogenerative Research Unit
- School of Chemical Sciences
- Universiti Sains Malaysia
- 11800 Minden
- Malaysia
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22
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Jin Y, Shi Y, Chen R, Chen X, Zheng X, Liu Y. Electrochemical disinfection using a modified reticulated vitreous carbon cathode for drinking water treatment. CHEMOSPHERE 2019; 215:380-387. [PMID: 30336315 DOI: 10.1016/j.chemosphere.2018.10.057] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 10/08/2018] [Accepted: 10/10/2018] [Indexed: 06/08/2023]
Abstract
A reticulated vitreous carbon (RVC) cathode modified by anodic polarization in 20 wt% H2SO4 solution was used for drinking water disinfection under a neutral low electrolyte concentration (0.25 g/L Na2SO4) condition. The contribution of the modified RVC anode and the Ti/RuO2 cathode to disinfection was investigated. The influences of current, initial Escherichia coli load, temperature and water volume were studied. The results show that H2O2 generation increased to approximately three times using the modification of the RVC. E. coli was mainly deactivated by the H2O2 generated at the cathode. For water with about 106 CFU/mL E. coli, the detection limit (<4 CFU/mL) was reached under different conditions. Increasing current could simultaneously shorten the treatment time and increase the energy consumption (EC) simultaneously. Although decreasing the initial load reduced the treatment time, the EC for per log E. coli removal increased. The time required for disinfection shortened from 3.5 to 2.5 h and the EC for per log removal decreased from 218.5 to 123.2 Wh/m3 when the temperature increased from 20 to 40 °C. Although more time was required for disinfection, the EC decreased from 218.5 to 141.4 Wh/m3 when the volume was doubled.
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Affiliation(s)
- Yanchao Jin
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian Province 350007, China
| | - Yijun Shi
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian Province 350007, China
| | - Riyao Chen
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian Province 350007, China.
| | - Xiao Chen
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian Province 350007, China
| | - Xi Zheng
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian Province 350007, China
| | - Yaoxing Liu
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian Province 350007, China
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23
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On the design of a jet-aerated microfluidic flow-through reactor for wastewater treatment by electro-Fenton. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.04.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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24
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Zhou W, Meng X, Rajic L, Xue Y, Chen S, Ding Y, Kou K, Wang Y, Gao J, Qin Y, Alshawabkeh AN. "Floating" cathode for efficient H 2O 2 electrogeneration applied to degradation of ibuprofen as a model pollutant. Electrochem commun 2018; 96:37-41. [PMID: 30546268 PMCID: PMC6287755 DOI: 10.1016/j.elecom.2018.09.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The performance of the Electro-Fenton (EF) process for contaminant degradation depends on the rate of H2O2 production at the cathode via 2-electron dissolved O2 reduction. However, the low solubility of O2 (≈1×10-3 mol dm-3) limits H2O2 production. Herein, a novel and practical strategy that enables the synergistic utilization of O2 from the bulk electrolyte and ambient air for efficient H2O2 production is proposed. Compared with a conventional "submerged" cathode, the H2O2 concentration obtained using the "floating" cathode is 4.3 and 1.5 times higher using porous graphite felt (GF) and reticulated vitreous carbon (RVC) foam electrodes, respectively. This surprising enhancement results from the formation of a three-phase interface inside the porous cathode, where the O2 from ambient air is also utilized for H2O2 production. The contribution of O2 from ambient air varies depending on the cathode material and is calculated to be 76.7% for the GF cathode and 35.6% for the RVC foam cathode. The effects of pH, current, and mixing on H2O2 production are evaluated. Finally, the EF process enhanced by the "floating" cathode degraded 78.3% of the anti-inflammatory drug ibuprofen after 120 min compared to only 25.4% using a conventional "submerged" electrode, without any increase in the cost.
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Affiliation(s)
- Wei Zhou
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
- Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Xiaoxiao Meng
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Ljiljana Rajic
- Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Yunfei Xue
- Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Shuai Chen
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yani Ding
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Kaikai Kou
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yan Wang
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jihui Gao
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yukun Qin
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Akram N. Alshawabkeh
- Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States
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25
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Tang PD, Du QS, Li DP, Dai J, Li YM, Du FL, Long SY, Xie NZ, Wang QY, Huang RB. Fabrication and Characterization of Graphene Microcrystal Prepared from Lignin Refined from Sugarcane Bagasse. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E565. [PMID: 30042305 PMCID: PMC6116210 DOI: 10.3390/nano8080565] [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: 06/23/2018] [Revised: 07/18/2018] [Accepted: 07/19/2018] [Indexed: 11/25/2022]
Abstract
Graphene microcrystal (GMC) is a type of glassy carbon fabricated from lignin, in which the microcrystals of graphene are chemically bonded by sp³ carbon atoms, forming a glass-like microcrystal structure. The lignin is refined from sugarcane bagasse using an ethanol-based organosolv technique which is used for the fabrication of GMC by two technical schemes: The pyrolysis reaction of lignin in a tubular furnace at atmospheric pressure; and the hydrothermal carbonization (HTC) of lignin at lower temperature, followed by pyrolysis at higher temperature. The existence of graphene nanofragments in GMC is proven by Raman spectra and XRD patterns; the ratio of sp² carbon atoms to sp³ carbon atoms is demonstrated by XPS spectra; and the microcrystal structure is observed in the high-resolution transmission electron microscope (HRTEM) images. Temperature and pressure have an important impact on the quality of GMC samples. With the elevation of temperature, the fraction of carbon increases, while the fraction of oxygen decreases, and the ratio of sp² to sp³ carbon atoms increases. In contrast to the pyrolysis techniques, the HTC technique needs lower temperatures because of the high vapor pressure of water. In general, with the help of biorefinery, the biomass material, lignin, is found to be qualified and sustainable material for the manufacture of GMC. Lignin acts as a renewable substitute for the traditional raw materials of glassy carbon, copolymer resins of phenol formaldehyde, and furfuryl alcohol-phenol.
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Affiliation(s)
- Pei-Duo Tang
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
| | - Qi-Shi Du
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
- Gordon Life Science Institute, 53 South Cottage Road, Belmont, MA 02478, USA.
| | - Da-Peng Li
- Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang 461000, China.
| | - Jun Dai
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
| | - Yan-Ming Li
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
| | - Fang-Li Du
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
| | - Si-Yu Long
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
| | - Neng-Zhong Xie
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
| | - Qing-Yan Wang
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
| | - Ri-Bo Huang
- State key Laboratory of Bioenergy Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China.
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26
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Tammam RH, Touny AH, Saleh MM. Removal of urea from dilute streams using RVC/nano-NiO x-modified electrode. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:19898-19907. [PMID: 29740765 DOI: 10.1007/s11356-018-2223-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
Reticulated vitreous carbon (RVC), a high surface area electrode (40 cm2/cm3), has been modified with nickel oxide nanoparticles (nano-NiOx) and used for electrochemical oxidation of urea from alkaline solution. For the cyclic voltammetry measurements, the used dimensions are 0.8 cm × 0.8 cm × 0.3 cm. The purpose was to offer high specific surface area using a porous open network structure to accelerate the electrochemical conversion. NiOx nanoparticles have been synthesized via an electrochemical route at some experimental conditions. The morphological, structural, and electrochemical properties of the RVC/nano-NiOx are characterized by using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), cyclic voltammetry (CV), and potentiostatic measurements. The fabricated electrode, RVC/nano-NiOx, demonstrates high electrocatalytic activity towards urea oxidation in an alkaline electrolyte. The onset potential of the RVC/nano-NiOx compared to that of the planar GC/NiOx is shifted to more negative value with higher specific activity. The different loadings of the NiOx have a substantial influence on the conversion of urea which has been evaluated from concentration-time curves. The urea concentration decreases with time to a limit dependent on the loading extent. Maximum conversion is obtained at 0.86 mg of NiOx per cm3 of the RVC matrix.
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Affiliation(s)
- Reham H Tammam
- Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt
| | - Ahmed H Touny
- Department of Chemistry, Faculty of Science, Helwan University, Helwan, Egypt
- Department of Chemistry, College of Science, King Faisal University, Al-Hassa, Kingdom of Saudi Arabia
| | - Mahmoud M Saleh
- Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt.
- Department of Chemistry, College of Science, King Faisal University, Al-Hassa, Kingdom of Saudi Arabia.
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27
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Sanchez-Alvarado DI, Guzmán-Pantoja J, Páramo-García U, Maciel-Cerda A, Martínez-Orozco RD, Vera-Graziano R. Morphological Study of Chitosan/Poly (Vinyl Alcohol) Nanofibers Prepared by Electrospinning, Collected on Reticulated Vitreous Carbon. Int J Mol Sci 2018; 19:ijms19061718. [PMID: 29890757 PMCID: PMC6032221 DOI: 10.3390/ijms19061718] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 11/16/2022] Open
Abstract
In this work, chitosan (CS)/poly (vinyl alcohol) (PVA) nanofibers were prepared by using the electrospinning method. Different CS concentrations (0.5, 1, 2, and 3 wt %), maintaining the PVA concentration at 8 wt %, were tested. Likewise, the studied electrospinning experimental parameters were: syringe/collector distance, solution flow and voltage. Subsequently, the electrospun fibers were collected on a reticulated vitreous carbon (RVC) support for 0.25, 0.5, 1, 1.5, and 2 h. The morphology and diameter of the CS/PVA nanofibers were characterized by scanning electron microscopy (SEM), finding diameters in the order of 132 and 212 nm; the best results (uniform fibers) were obtained from the solution with 2 wt % of chitosan and a voltage, distance, and flow rate of 16 kV, 20 cm, and 0.13 mL/h, respectively. Afterwards, a treatment with an ethanolic NaOH solution was performed, observing a change in the fiber morphology and a diameter decrease (117 ± 9 nm).
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Affiliation(s)
- Diana Isela Sanchez-Alvarado
- Tecnológico Nacional de México/Instituto Tecnológico de Cd. Madero, Centro de Investigación en Petroquímica, Prol. Bahía de Aldhair y Av. De las Bahías, Parque de la Pequeña y Mediana Industria, Altamira, Tamaulipas 89600, Mexico.
| | - Javier Guzmán-Pantoja
- Instituto Mexicano del Petróleo, Gerencia de Transformación de Hidrocarburos, Eje Central Lázaro Cárdenas No. 152, Col. San Bartolo Atepehuacán, 07730 Ciudad de México, Mexico.
| | - Ulises Páramo-García
- Tecnológico Nacional de México/Instituto Tecnológico de Cd. Madero, Centro de Investigación en Petroquímica, Prol. Bahía de Aldhair y Av. De las Bahías, Parque de la Pequeña y Mediana Industria, Altamira, Tamaulipas 89600, Mexico.
| | - Alfredo Maciel-Cerda
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Circuito de la Investigación Científica, Ciudad Universitaria, 04510 Ciudad de México, Mexico.
| | - Reinaldo David Martínez-Orozco
- Tecnológico Nacional de México/Instituto Tecnológico de Cd. Madero, Centro de Investigación en Petroquímica, Prol. Bahía de Aldhair y Av. De las Bahías, Parque de la Pequeña y Mediana Industria, Altamira, Tamaulipas 89600, Mexico.
| | - Ricardo Vera-Graziano
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Circuito de la Investigación Científica, Ciudad Universitaria, 04510 Ciudad de México, Mexico.
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28
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Zhou W, Gao J, Rajic L, Ding Y, Zhao Y, Zhao H, Meng X, Wang Y, Kou K, Xu Y, Wu S, Qin Y, Alshawabkeh AN. Drastic Enhancement of H 2O 2 Electro-generation by Pulsed Current for Ibuprofen Degradation: Strategy Based on Decoupling Study on H 2O 2 Decomposition Pathways. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2018; 338:709-718. [PMID: 32153347 PMCID: PMC7062375 DOI: 10.1016/j.cej.2017.12.152] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Efficient H2O2 electrogeneration from 2-electron oxygen reduction reaction (ORR) represents an important challenge for environmental remediation application. H2O2 production is determined by 2-electron ORR as well as H2O2 decomposition. In this work, a novel strategy based on the systematical investigation on H2O2 decomposition pathways was reported, presenting a drastically improved bulk H2O2 concentration. Results showed that bulk phase disproportion, cathodic reduction, and anodic oxidation all contributed to H2O2 depletion. To decrease the extent of H2O2 cathodic reduction, the pulsed current was applied and proved to be highly effective to lower the extent of H2O2 electroreduction. A systematic study of various pulsed current parameters showed that H2O2 concentration was significantly enhanced by 61.6% under pulsed current of "2s ON + 2s OFF" than constant current. A mechanism was proposed that under pulsed current, less H2O2 molecules were electroreduced when they diffused from the porous cathode to the bulk electrolyte. Further results demonstrated that a proper pulse frequency was necessary to achieve a higher H2O2 production. Finally, this strategy was applied to Electro-Fenton (EF) process with ibuprofen as model pollutant. 75.0% and 34.1% ibuprofen were removed under pulsed and constant current at 10 min, respectively. The result was in consistent with the higher H2O2 and ·OH production in EF under pulsed current. This work poses a potential approach to drastically enhance H2O2 production for improved EF performance on organic pollutants degradation without making any changes to the system except for power mode.
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Affiliation(s)
- Wei Zhou
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
- Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Jihui Gao
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
- Corresponding author: Prof. Jihui Gao, School of Energy Science and Engineering, Harbin Institute of Technology, 92, Dazhi Street, Nangang District, Harbin 150001, China, , Telephone: (86)-0451-8641 3231, Fax: (86)-0451-8641 2528
| | - Ljiljana Rajic
- Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Yani Ding
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Yuwei Zhao
- Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Haiqian Zhao
- School of Civil Engineering & Architecture, Northeast Petroleum University, Daqing 163318, P. R. China
| | - Xiaoxiao Meng
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Yan Wang
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Kaikai Kou
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Yiqun Xu
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Shaohua Wu
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Yukun Qin
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Akram N. Alshawabkeh
- Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States
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29
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Liu C, Li C, Ahmed K, Mutlu Z, Lee I, Zaera F, Ozkan CS, Ozkan M. High-Potential Metalless Nanocarbon Foam Supercapacitors Operating in Aqueous Electrolyte. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1702444. [PMID: 29493117 DOI: 10.1002/smll.201702444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 12/22/2017] [Indexed: 06/08/2023]
Abstract
Light-weight graphite foam decorated with carbon nanotubes (dia. 20-50 nm) is utilized as an effective electrode without binders, conductive additives, or metallic current collectors for supercapacitors in aqueous electrolyte. Facile nitric acid treatment renders wide operating potentials, high specific capacitances and energy densities, and long lifespan over 10 000 cycles manifested as 164.5 and 111.8 F g-1 , 22.85 and 12.58 Wh kg-1 , 74.6% and 95.6% capacitance retention for 2 and 1.8 V, respectively. Overcharge protection is demonstrated by repetitive cycling between 2 and 2.5 V for 2000 cycles without catastrophic structural demolition or severe capacity fading. Graphite foam without metallic strut possessing low density (≈0.4-0.45 g cm-3 ) further reduces the total weight of the electrode. The thorough investigation of the specific capacitances and coulombic efficiencies versus potential windows and current densities provides insights into the selection of operation conditions for future practical devices.
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Affiliation(s)
- Chueh Liu
- Materials Science and Engineering Program, Department of Electrical Engineering, Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Changling Li
- Materials Science and Engineering Program, Department of Mechanical Engineering, Department of Electrical Engineering, University of California, Riverside, CA, 92521, USA
| | - Kazi Ahmed
- Materials Science and Engineering Program, Department of Electrical Engineering, Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Zafer Mutlu
- Materials Science and Engineering Program, Department of Mechanical Engineering, Department of Electrical Engineering, University of California, Riverside, CA, 92521, USA
| | - Ilkeun Lee
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Francisco Zaera
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Cengiz S Ozkan
- Materials Science and Engineering Program, Department of Mechanical Engineering, Department of Electrical Engineering, University of California, Riverside, CA, 92521, USA
| | - Mihrimah Ozkan
- Materials Science and Engineering Program, Department of Electrical Engineering, Department of Chemistry, University of California, Riverside, CA, 92521, USA
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30
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Electro-polymerisation of 3,4-ethylenedioxythiophene on reticulated vitreous carbon in imidazolium-based chloroaluminate ionic liquid as energy storage material. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.02.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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31
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Zhou W, Ding Y, Gao J, Kou K, Wang Y, Meng X, Wu S, Qin Y. Green electrochemical modification of RVC foam electrode and improved H 2O 2 electrogeneration by applying pulsed current for pollutant removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:6015-6025. [PMID: 29238928 DOI: 10.1007/s11356-017-0810-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 11/20/2017] [Indexed: 06/07/2023]
Abstract
The performance of cathode on H2O2 electrogeneration is a critical factor that limits the practical application of electro-Fenton (EF) process. Herein, we report a simple but effective electrochemical modification of reticulated vitreous carbon foam (RVC foam) electrode for enhanced H2O2 electrogeneration. Cyclic voltammetry, chronoamperometry, and X-ray photoelectron spectrum were used to characterize the modified electrode. Oxygen-containing groups (72.5-184.0 μmol/g) were introduced to RVC foam surface, thus resulting in a 59.8-258.2% higher H2O2 yield. The modified electrodes showed much higher electrocatalytic activity toward O2 reduction and good stability. Moreover, aimed at weakening the extent of electroreduction of H2O2 in porous RVC foam, the strategy of pulsed current was proposed. H2O2 concentration was 582.3 and 114.0% higher than the unmodified and modified electrodes, respectively. To test the feasibility of modification, as well as pulsed current, EF process was operated for removal of Reactive Blue 19 (RB19). The fluorescence intensity of hydroxybenzoic acid in EF with modified electrode is 3.2 times higher than EF with unmodified electrode, illustrating more hydroxyl radicals were generated. The removal efficiency of RB 19 in EF with unmodified electrode, modified electrode, and unmodified electrode assisted by pulsed current was 53.9, 68.9, and 81.1%, respectively, demonstrating that the green modification approach, as well as pulsed current, is applicable in EF system for pollutant removal. Graphical abstract ᅟ.
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Affiliation(s)
- Wei Zhou
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China
| | - Yani Ding
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China
| | - Jihui Gao
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China.
| | - Kaikai Kou
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China
| | - Yan Wang
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China
| | - Xiaoxiao Meng
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China
| | - Shaohua Wu
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China
| | - Yukun Qin
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China
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32
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Castañeda LF, Walsh FC, Nava JL, Ponce de León C. Graphite felt as a versatile electrode material: Properties, reaction environment, performance and applications. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.11.165] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Zhang H, Zhang L, Han Y, Yu Y, Xu M, Zhang X, Huang L, Dong S. RGO/Au NPs/N-doped CNTs supported on nickel foam as an anode for enzymatic biofuel cells. Biosens Bioelectron 2017; 97:34-40. [DOI: 10.1016/j.bios.2017.05.030] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 05/13/2017] [Accepted: 05/16/2017] [Indexed: 10/19/2022]
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Arenas LF, Ponce de León C, Walsh FC. Pressure drop through platinized titanium porous electrodes for cerium-based redox flow batteries. AIChE J 2017. [DOI: 10.1002/aic.16000] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Luis F. Arenas
- Electrochemical Engineering Laboratory, Energy Technology Group, Dept. of Mechanical Engineering; University of Southampton; Southampton SO17 1BJ U.K
| | - Carlos Ponce de León
- Electrochemical Engineering Laboratory, Energy Technology Group, Dept. of Mechanical Engineering; University of Southampton; Southampton SO17 1BJ U.K
| | - Frank C. Walsh
- Electrochemical Engineering Laboratory, Energy Technology Group, Dept. of Mechanical Engineering; University of Southampton; Southampton SO17 1BJ U.K
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Chen L, He Y, Tao WQ, Zelenay P, Mukundan R, Kang Q. Pore-scale study of multiphase reactive transport in fibrous electrodes of vanadium redox flow batteries. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.086] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kaindl R, Bayer BC, Resel R, Müller T, Skakalova V, Habler G, Abart R, Cherevan AS, Eder D, Blatter M, Fischer F, Meyer JC, Polyushkin DK, Waldhauser W. Growth, structure and stability of sputter-deposited MoS 2 thin films. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:1115-1126. [PMID: 28685112 PMCID: PMC5480320 DOI: 10.3762/bjnano.8.113] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 04/24/2017] [Indexed: 05/31/2023]
Abstract
Molybdenum disulphide (MoS2) thin films have received increasing interest as device-active layers in low-dimensional electronics and also as novel catalysts in electrochemical processes such as the hydrogen evolution reaction (HER) in electrochemical water splitting. For both types of applications, industrially scalable fabrication methods with good control over the MoS2 film properties are crucial. Here, we investigate scalable physical vapour deposition (PVD) of MoS2 films by magnetron sputtering. MoS2 films with thicknesses from ≈10 to ≈1000 nm were deposited on SiO2/Si and reticulated vitreous carbon (RVC) substrates. Samples deposited at room temperature (RT) and at 400 °C were compared. The deposited MoS2 was characterized by macro- and microscopic X-ray, electron beam and light scattering, scanning and spectroscopic methods as well as electrical device characterization. We find that room-temperature-deposited MoS2 films are amorphous, of smooth surface morphology and easily degraded upon moderate laser-induced annealing in ambient conditions. In contrast, films deposited at 400 °C are nano-crystalline, show a nano-grained surface morphology and are comparatively stable against laser-induced degradation. Interestingly, results from electrical transport measurements indicate an unexpected metallic-like conduction character of the studied PVD MoS2 films, independent of deposition temperature. Possible reasons for these unusual electrical properties of our PVD MoS2 thin films are discussed. A potential application for such conductive nanostructured MoS2 films could be as catalytically active electrodes in (photo-)electrocatalysis and initial electrochemical measurements suggest directions for future work on our PVD MoS2 films.
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Affiliation(s)
- Reinhard Kaindl
- JOANNEUM RESEARCH - MATERIALS, Institute for Surface Technologies and Photonics, Leobner Straße 94, A-8712 Niklasdorf, Austria
| | - Bernhard C Bayer
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
| | - Roland Resel
- Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, Austria
| | - Thomas Müller
- Photonics Institute, Vienna University of Technology, Gusshausstraße 27–29, A-1040 Vienna, Austria
| | - Viera Skakalova
- Danubia NanoTech, Ilkovicova 3, SVK-84104, Bratislava, Slovakia
| | - Gerlinde Habler
- Department of Lithospheric Research, University of Vienna, Althanstraße 14, A-1090 Vienna, Austria
| | - Rainer Abart
- Department of Lithospheric Research, University of Vienna, Althanstraße 14, A-1090 Vienna, Austria
| | - Alexey S Cherevan
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Dominik Eder
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Maxime Blatter
- Institute of Life Technologies, HES-SO Valais-Wallis, Route du Rawyl 64, CP, 1950 Sion 2, Switzerland
| | - Fabian Fischer
- Institute of Life Technologies, HES-SO Valais-Wallis, Route du Rawyl 64, CP, 1950 Sion 2, Switzerland
| | - Jannik C Meyer
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
| | - Dmitry K Polyushkin
- Photonics Institute, Vienna University of Technology, Gusshausstraße 27–29, A-1040 Vienna, Austria
| | - Wolfgang Waldhauser
- JOANNEUM RESEARCH - MATERIALS, Institute for Surface Technologies and Photonics, Leobner Straße 94, A-8712 Niklasdorf, Austria
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3D-printed porous electrodes for advanced electrochemical flow reactors: A Ni/stainless steel electrode and its mass transport characteristics. Electrochem commun 2017. [DOI: 10.1016/j.elecom.2017.03.009] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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