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Liu Q, Shen Y, Song S, He Z. Enhanced electrocatalytic hydrodechlorination of 2,4-dichlorophenoxyacetic acid by a Pd-Co 3O 4/Ni foam electrode. RSC Adv 2019; 9:12124-12133. [PMID: 35517021 PMCID: PMC9063476 DOI: 10.1039/c9ra01843c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 04/09/2019] [Indexed: 11/21/2022] Open
Abstract
A new Pd-Co3O4/Ni foam electrode was synthesized by a facile two-step method comprising co-electrodeposition and calcination. Compared with Ni foam-supported Pd electrodes obtained by electrodeposition or chemical deposition, the new Pd-Co3O4/Ni foam electrode exhibited greatly enhanced catalytic hydrodechlorination activity. The introduction of Co3O4 reduced the amount of Pd required. For the same degree of dechlorination of 2,4-D, only 25% of the Pd was required in the Pd-Co3O4/Ni foam electrode compared with the Ni foam electrode prepared by chemical deposition. Various characterizations indicated that Co3O4 on the surface of the Ni foam enhanced catalytic performance through accelerated generation of atomic H*. In addition, the good distribution of macropores, providing a larger specific surface area and lower electron transfer impedance, enabled more adsorption of atomic .
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Affiliation(s)
- Qiuxiang Liu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology Hangzhou 310032 People's Republic of China
- College of Environment, Zhejiang University of Technology Hangzhou 310032 People's Republic of China +86-571-88320276 +86-571-88320726
| | - Yanting Shen
- College of Environment, Zhejiang University of Technology Hangzhou 310032 People's Republic of China +86-571-88320276 +86-571-88320726
| | - Shuang Song
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology Hangzhou 310032 People's Republic of China
- College of Environment, Zhejiang University of Technology Hangzhou 310032 People's Republic of China +86-571-88320276 +86-571-88320726
| | - Zhiqiao He
- College of Environment, Zhejiang University of Technology Hangzhou 310032 People's Republic of China +86-571-88320276 +86-571-88320726
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Boukreris S, Ilikti H, Youcef MH, Khenifi A, Benabdallah T. Electrocatalytic Hydrogenolysis of Chlorophenolic Compounds by Modified Electrodes in Aqueous Medium in the Absence and the Presence of Ionic Surfactant. TENSIDE SURFACT DET 2017. [DOI: 10.3139/113.110530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AbstractThe electrocatalytic hydrogenolysis of different chlorophenolic compounds, namely 2-chlorophenol (2CP) and pentachlorophenol (PCP) was performed on nickel-silica (Ni-SiO2) and nickel-clay (Ni-CY) electrode catalyts. The influence of the catalytic support and the surfactant agent was studied in aqueous media at different pH. Results demonstrated that different regioselectivities were observed according to the used catalytic support. The cyclohexanone was obtained as the major product. In presence of ionic surfactants (SDS and CTAB), the investigated electrodes exhibited a promising dechlorination and hydrogenation potential of aromatic halides with high electrocatalytic activity and good stability.
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Affiliation(s)
- Sadia Boukreris
- 1Laboratoire de Chimie et d'Electrochimie des Complexes Métalliques (LCECM)
| | - Hocine Ilikti
- 1Laboratoire de Chimie et d'Electrochimie des Complexes Métalliques (LCECM)
| | | | - Aicha Khenifi
- 2Laboratoire de Physico-Chimie des Matériaux, Catalyse et Environnement (LPCMCE)
| | - Tayeb Benabdallah
- 1Laboratoire de Chimie et d'Electrochimie des Complexes Métalliques (LCECM)
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Kinetics of electrochemical dechlorination of 2-chlorobiphenyl on a palladium-modified nickel foam cathode in a basic medium: From batch to continuous reactor operation. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.07.207] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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He Z, Sun J, Wei J, Wang Q, Huang C, Chen J, Song S. Effect of silver or copper middle layer on the performance of palladium modified nickel foam electrodes in the 2-chlorobiphenyl dechlorination. JOURNAL OF HAZARDOUS MATERIALS 2013; 250-251:181-189. [PMID: 23454456 DOI: 10.1016/j.jhazmat.2013.02.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 01/08/2013] [Accepted: 02/01/2013] [Indexed: 06/01/2023]
Abstract
To enhance the activity of chemi-deposited palladium/nickel foam (Pd/Ni) electrodes used for an electrochemical dechlorination process, silver or copper was deposited electrochemically onto the nickel foam substrate (to give Ag/Ni or Cu/Ni) before the chemical deposition of palladium. The physicochemical properties of the resulting materials (Pd/Ni, Pd/Ag/Ni and Pd/Cu/Ni) were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and their electrochemical catalytic activities were evaluated by monitoring the electrochemical dechlorination of 2-chlorobiphenyl (2-CB) in strongly alkaline methanol/water solution. The results show that the Pd/Ag/Ni and Pd/Cu/Ni electrodes had consistently higher electrocatalytic activities and current efficiencies (CEs) compared with the untreated Pd/Ni electrode. The Pd/Ag/Ni electrode exhibited the highest activity. The dechlorination was also studied as a function of Pd loading, the Ag or Cu interlayer loadings, and the current density. The Pd loading and the interlayer loadings both had positive effects on the dechlorination reaction. Increasing the current density increased the reaction rate but reduced the CE. The improvement of the electrocatalytic activities of the Pd/Ni electrode by applying the interlayer of Ag or Cu resulted from the enlargement of the effective surface area of the electrode and the adjustment of the metal-H bond energy to the appropriate value, as well as the effective adsorption of 2-CB on Ag. Moreover, the high catalytic activity of the Pd/Ag/Ni electrode was maintained after six successive cyclic experiments, whereas Pd/Cu/Ni electrodes deactivate severely under the same conditions.
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Affiliation(s)
- Zhiqiao He
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, People's Republic of China
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Wang C, Zhu N, Wang Y, Zhang F. Co-detoxification of transformer oil-contained PCBs and heavy metals in medical waste incinerator fly ash under sub- and supercritical water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:1003-1009. [PMID: 22142259 DOI: 10.1021/es202342h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The simultaneous detoxification processes of transformer oil-contained PCBs and heavy metals in medical waste incinerator (MWI) fly ash were developed under sub- and supercritical water. The addition of MWI fly ash to transformer oil-contained PCBs was found to increase the destruction efficiency of PCBs, at the same time, it facilitated reducing the leaching concentration of toxic metals from residues (obtained after reaction) for harmless disposal. In this study, we elucidated primarily the catalysis possibility of heavy metals in raw MWI fly ash for PCBs degradation by adopting the sequential extraction procedure. For both MWI fly ashes, more than 90% destruction efficiency of PCBs was achieved at ≥375 °C for 30 min, and trichlorobenzene (TCB) existing in the transformer oil was also completely decomposed. The correlation of catalytic performance to PCBs degradation was discussed based on structural characteristics and dechlorinated products. Likewise, such process rendered residues innocuous through supercritical water treatment for reuse or disposal in landfill.
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Affiliation(s)
- Chunfeng Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, People's Republic of China
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He Z, Zhan L, Wang Q, Song S, Chen J, Zhu K, Xu X, Liu W. Increasing the activity and stability of chemi-deposited palladium catalysts on nickel foam substrate by electrochemical deposition of a middle coating of silver. Sep Purif Technol 2011. [DOI: 10.1016/j.seppur.2011.06.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yang B, Deng S, Yu G, Zhang H, Wu J, Zhuo Q. Bimetallic Pd/Al particles for highly efficient hydrodechlorination of 2-chlorobiphenyl in acidic aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2011; 189:76-83. [PMID: 21377789 DOI: 10.1016/j.jhazmat.2011.02.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 01/31/2011] [Accepted: 02/01/2011] [Indexed: 05/30/2023]
Abstract
Pd-based bimetallic materials have been widely studied for the effective hydrodechlorination (HDC) of aqueous chloroorganic compounds. However, the reaction functions of metal substrates and mechanism responsible for changes in reactivity have not been fully elucidated. Here, we synthesized Pd-based bimetals with Mg, Al, Mn, Zn, Fe, Sn, and Cu to explore the influence of metal substrates on HDC reactivity of 2-chlorobiphenyl (2-PCB). Bimetals exhibited disparate reactivity toward 2-PCB in acidic solution. Among these bimetals, Pd/Al particles presented the highest stability and relatively high reactivity to remove 2-PCB. The maintenance and regeneration of Al substrate are attributed to its particular corrosion properties which provide an efficient recycling between Al element and its oxide layer. The fresh and reacted Pd/Al samples were characterized by ICP-OES, SEM, XRD, and BET. The investigation of the pH effect on 2-PCB HDC further revealed the particular behaviour of Al surface. The effect of Pd loading amount on the HDC indicated that the optimal Pd content in terms of catalytic activity was related to the Pd dispersion degree. Finally, a mechanism for 2-PCB HDC on the Pd/Al surface was proposed.
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Affiliation(s)
- Bo Yang
- School of Environment, POPs Research Centre, Tsinghua University, Beijing 100084, China
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Wang S, Yang B, Zhang T, Yu G, Deng S, Huang J. Catalytic Hydrodechlorination of 4-Chlorophenol in an Aqueous Solution with Pd/Ni Catalyst and Formic Acid. Ind Eng Chem Res 2010. [DOI: 10.1021/ie9005194] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shu Wang
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Bo Yang
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Tingting Zhang
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Gang Yu
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Shubo Deng
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jun Huang
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
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Electrocatalytic dechlorination of 2,4,5-trichlorobiphenyl using an aligned carbon nanotubes electrode deposited with palladium nanoparticles. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s11434-010-0003-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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