1
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Sarkar W, LaDuca A, Wilson JR, Szymczak NK. Iron-Catalyzed C-H Oxygenation Using Perchlorate Enabled by Secondary Sphere Hydrogen Bonds. J Am Chem Soc 2024; 146:10508-10516. [PMID: 38564312 PMCID: PMC11137739 DOI: 10.1021/jacs.3c14433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Perchlorate (ClO4-) is a groundwater pollutant that is challenging to remediate. We report a strategy to use Fe(II) tris(2-pyridylmethyl)amine (TPA) complexes featuring appended aniline hydrogen bonds (H-bonds) to promote ClO4- reduction. These complexes facilitate oxygen atom transfer from ClO4- to PPh3 and C-H oxygenation reactions of organic substrates. Catalytic reactions using 15 mol % afforded excellent yields for oxygenation of anthracene and cyclic alkyl aromatics, and this methodology tolerates aryl halides as well as heterocycles containing either O, S, or N.
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Affiliation(s)
- Writhabrata Sarkar
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States
| | - Andrew LaDuca
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States
| | - Jessica R Wilson
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States
| | - Nathaniel K Szymczak
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States
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2
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Xue Y, Jia Y, Liu S, Yuan S, Ma R, Ma Q, Fan J, Zhang WX. Electrochemical reduction of wastewater by non-noble metal cathodes: From terminal purification to upcycling recovery. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132106. [PMID: 37506648 DOI: 10.1016/j.jhazmat.2023.132106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
A shift beyond conventional environmental remediation to a sustainable pollutant upgrading conversion is extremely desirable due to the rising demand for resources and widespread chemical contamination. Electrochemical reduction processes (ERPs) have drawn considerable attention in recent years in the fields of oxyanion reduction, metal recovery, detoxification and high-value conversion of halogenated organics and benzenes. ERPs also have the potential to address the inherent limitations of conventional chemical reduction technologies in terms of hydrogen and noble metal requirements. Fundamentally, mechanisms of ERPs can be categorized into three main pathways: direct electron transfer, atomic hydrogen mediation, and electrode redox pairs. Furthermore, this review consolidates state-of-the-art non-noble metal cathodes and their performance comparable to noble metals (e.g., Pd, Pt) in electrochemical reduction of inorganic/organic pollutants. To overview the research trends of ERPs, we innovatively sort out the relationship between the electrochemical reduction rate, the charge of the pollutant, and the number of electron transfers based on the statistical analysis. And we propose potential countermeasures of pulsed electrocatalysis and flow mode enhancement for the bottlenecks in electron injection and mass transfer for electronegative pollutant reduction. We conclude by discussing the gaps in the scientific and engineering level of ERPs, and envisage that ERPs can be a low-carbon pathway for industrial wastewater detoxification and valorization.
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Affiliation(s)
- Yinghao Xue
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, PR China
| | - Yan Jia
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, PR China
| | - Shuan Liu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, PR China
| | - Shiyin Yuan
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, PR China
| | - Raner Ma
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, PR China
| | - Qian Ma
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, PR China
| | - Jianwei Fan
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, PR China.
| | - Wei-Xian Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, PR China
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3
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Li M, Liu H, Liu C, Ding Y, Fang C, Wan R, Zhu H, Yang Y. Pd sub-nanolayer on Au core for enhanced catalytic hydrogenation reduction of oxyanions pollutants: Synergistic effect of Pd and Au. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 333:122067. [PMID: 37352958 DOI: 10.1016/j.envpol.2023.122067] [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: 04/28/2023] [Revised: 06/10/2023] [Accepted: 06/15/2023] [Indexed: 06/25/2023]
Abstract
Oxyanion pollutants in industrial wasterwater, such as (Cr(VI)), BrO3- (Br(V)) and SeO32- (Se(IV)) have detrimental or toxic effects on individual health when their concentrations accumulated to a certain level. The conversion of these oxyanions into harmless/industrial-valuable products or removal from wastewater is of significance. Herein, we designed Pd sub-nanolayer on Au core catalysts supported on Al2O3 (sub-Pd-Au/Al2O3) for highly effective catalytic hydrogenation reduction of oxyanions under ambient conditions. The sub-Pd(0.049)-Au(0.927)/Al2O3 catalyst exhibited the highest catalytic activity and TOF value for Cr(VI), Br(V) and Se(IV) reduction, respectively, by optimizing the Pd loading amount. The synergistic effect between Pd sub-nanolayer and Au core enhanced catalytic activity by regulating the Pd dispersion and site property, according to thorough characterizations that included high-angle annular dark-field transmission electron microscopy (HAADF-TEM) image, in-situ CO-IR adsorption, CO chemisorption, and X-ray photoelectron spectroscopy (XPS). This work might provide some new lights on design of highly efficient catalysts for the elimination of oxyanion pollutants.
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Affiliation(s)
- Minghui Li
- College of Ecology and Environment, Anhui Normal University, 189 South of Jiuhua Road, Wuhu, Anhui, 241002, PR China
| | - Hang Liu
- College of Ecology and Environment, Anhui Normal University, 189 South of Jiuhua Road, Wuhu, Anhui, 241002, PR China; Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, 189 South of Jiuhua Road, Wuhu, Anhui, 241002, PR China
| | - Chang Liu
- College of Ecology and Environment, Anhui Normal University, 189 South of Jiuhua Road, Wuhu, Anhui, 241002, PR China
| | - Yan Ding
- College of Ecology and Environment, Anhui Normal University, 189 South of Jiuhua Road, Wuhu, Anhui, 241002, PR China
| | - Caixia Fang
- College of Ecology and Environment, Anhui Normal University, 189 South of Jiuhua Road, Wuhu, Anhui, 241002, PR China
| | - Rui Wan
- College of Ecology and Environment, Anhui Normal University, 189 South of Jiuhua Road, Wuhu, Anhui, 241002, PR China
| | - Hongjie Zhu
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, PR China
| | - Yaning Yang
- College of Ecology and Environment, Anhui Normal University, 189 South of Jiuhua Road, Wuhu, Anhui, 241002, PR China; Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, PR China; Anhui Huaqi Environmental Protection Technology Co. Ltd., Ma' Anshan, Anhui, 243000, PR China.
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4
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Boasiako CA, Zhou Z, Huo X, Ye T. Development of Pd-based catalysts for hydrogenation of nitrite and nitrate in water: A review. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130661. [PMID: 36587602 DOI: 10.1016/j.jhazmat.2022.130661] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/14/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Pd-based catalytic hydrogenation for nitrate decontamination has been the subject of extensive research over the past 30 years. Advances in computational simulation, nanomaterial synthesis, and experimental characterization in the past decade have generated new understandings of the reaction mechanisms, guided the development of various catalysts with enhanced performance, and brought revolutionary upgrades to conventional nitrate treatment technologies. However, technical and economic challenges are still limiting its large-scale implementation. In this review, we provide a brief summary of the up-to-date reaction pathways. We then critically examine the methods for the synthesis of supported Pd-based catalysts and the supports that are used for the immobilization of Pd-based catalysts, identifying candidate catalysts with the most promising future. To facilitate practical deployment and niche applications of catalytic hydrogenation, we introduce alternative easy-to-handle hydrogen carriers and cost-effective metal catalysts that can potentially substitute precious Pd. Afterwards, we emphasize the significance of new development in hybrid catalytic systems that couple catalytic processes with other modules, enabling economically and sustainably treating nitrate-contaminated water. Future research needs are accordingly proposed. Through this review, we aim to provide guidance for standardized catalyst synthesis strategies and candidate catalyst evaluation and motivate future research that produces catalysts with industrially relevant performance.
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Affiliation(s)
- Collins Antwi Boasiako
- Department of Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, United States
| | - Zhe Zhou
- Department of Civil and Environmental Engineering, The George Washington University, Washington DC 20052, United States
| | - Xiangchen Huo
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, United States
| | - Tao Ye
- Department of Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, United States.
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5
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Gao J, Zhao Q, Tan C, Xie S, Yin Y, Liu F, Liu H, Chen B, Liu J. Accelerating Catalytic Oxyanion Reduction with Inert Metal Hydroxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:1479-1486. [PMID: 36633933 PMCID: PMC9878714 DOI: 10.1021/acs.est.2c06468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 12/24/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Adding CrIII or AlIII salts into the water suspension of platinum group metal (PGM) catalysts accelerated oxyanion pollutant reduction by up to 600%. Our initial attempts of adding K2CrVIO4, K2CrVI2O7, or KCrIII(SO4)2 into Pd/C enhanced BrO3- reduction with 1 atm H2 by 6-fold. Instrument characterizations and kinetic explorations collectively confirmed the immobilization of reduced CrVI as CrIII(OH)3 on the catalyst surface. This process altered the ζ-potentials from negative to positive, thus substantially enhancing the Langmuir-Hinshelwood adsorption equilibrium constant for BrO3- onto Pd/C by 37-fold. Adding AlIII(OH)3 from alum at pH 7 achieved similar enhancements. The Cr-Pd/C and Al-Pd/C showed top-tier efficiency of catalytic performance (normalized with Pd dosage) among all the reported Pd catalysts on conventional and nanostructured support materials. The strategy of adding inert metal hydroxides works for diverse PGMs (palladium and rhodium), substrates (BrO3- and ClO3-), and support materials (carbon, alumina, and silica). This work shows a simple, inexpensive, and effective example of enhancing catalyst activity and saving PGMs for environmental applications.
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Affiliation(s)
- Jinyu Gao
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California92521, United States
| | - Qiang Zhao
- Department
of Environmental Science, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Cheng Tan
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California92521, United States
| | - Shaohua Xie
- Department
of Civil, Environmental, and Construction Engineering, Catalysis Cluster
for Renewable Energy and Chemical Transformations (REACT), NanoScience
Technology Center (NSTC), University of
Central Florida, Orlando, Florida32816, United States
| | - Yadong Yin
- Department
of Chemistry, University of California, Riverside, California92521, United States
| | - Fudong Liu
- Department
of Civil, Environmental, and Construction Engineering, Catalysis Cluster
for Renewable Energy and Chemical Transformations (REACT), NanoScience
Technology Center (NSTC), University of
Central Florida, Orlando, Florida32816, United States
| | - Haizhou Liu
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California92521, United States
| | - Baoliang Chen
- Department
of Environmental Science, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Jinyong Liu
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California92521, United States
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6
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Perchlorate reduction catalyzed by dioxidomolybdenum(VI) complexes: Effect of ligand substituents. J Catal 2022. [DOI: 10.1016/j.jcat.2022.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Almassi S, Ren C, Liu J, Chaplin BP. Electrocatalytic Perchlorate Reduction Using an Oxorhenium Complex Supported on a Ti 4O 7 Reactive Electrochemical Membrane. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3267-3276. [PMID: 35175742 DOI: 10.1021/acs.est.1c08220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
An organometallic rhenium catalyst was deposited on a Ti4O7 reactive electrochemical membrane (Re/REM) for the electrocatalytic reduction of aqueous ClO4- to Cl-. Results showed increasing ClO4- reduction upon increasing cathodic potential (i.e., -0.4 to-1.7 V/SHE). A 5 mM ClO4- solution was reduced by ∼21% in a single pass (residence time ∼0.2 s) through the Re/REM at a pH of 7, with >99% Cl- selectivity and a current efficiency of ∼100%. Kinetic analysis indicated that the reaction rate constant increased from 3953 to 7128 L h-1 gRe-1 at pH values of 9 to 3, respectively, and was mass transport-limited at pH < 5. The rate constants were 2 orders of magnitude greater than reported values for an analogous catalytic system using hydrogen as an electron donor. A continuous flow Re/REM system reduced 1 ppm ClO4- in a groundwater sample by >99.9% for the first 93.5 h, and concentrations were lower than the EPA ClO4- guideline (56 ppb) for 374 h of treatment. The fast ClO4- reduction kinetics and high chloride selectivity without the need for acidic conditions and a continual hydrogen electron donor supply for catalyst regeneration indicate the promising ability of the Re/REM for aqueous electrocatalytic ClO4- treatment.
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Affiliation(s)
- Soroush Almassi
- Department of Chemical Engineering, University of Illinois at Chicago, 929 W. Taylor Street, Chicago, Illinois 60607, United States
| | - Changxu Ren
- Department of Chemical and Environmental Engineering, University of California, Riverside, 900 University Avenue, Riverside, California 92521, United States
| | - Jinyong Liu
- Department of Chemical and Environmental Engineering, University of California, Riverside, 900 University Avenue, Riverside, California 92521, United States
| | - Brian P Chaplin
- Department of Chemical Engineering, University of Illinois at Chicago, 929 W. Taylor Street, Chicago, Illinois 60607, United States
- Institute of Environmental Science and Policy, University of Illinois at Chicago, 1603 W. Taylor Street, Chicago, Illinois 60612, United States
- Department of Civil, Materials, and Environmental Engineering, University of Illinois at Chicago, 842 W. Taylor Street, Chicago, Illinois 60607, United States
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8
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Palladium Impregnation on Electrospun Carbon Fibers for Catalytic Reduction of Bromate in Water. Processes (Basel) 2022. [DOI: 10.3390/pr10030458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The remediation of bromate in water is a concern due to the reported health issues caused by its ingestion. Catalytic processes, wherein bromate is reduced to non-hazardous bromide, have been studied. In the present work, catalysts of 1% palladium supported in electrospun carbon fibers (Pd-CFs) using different methods for palladium incorporation were prepared. The textural properties, morphology, crystalline structure, and hydrogenation capacity by H2 chemisorption analysis of the Pd-CFs catalysts were characterized. The catalytic tests were performed in a semi-batch reactor, and the obtained results showed different catalytic activity by each prepared Pd-CFs catalyst. The catalysts prepared by incipient wetness impregnation—1% Pd/CF1 and 1% Pd/CF2, using CFs obtained with electrospinning flow rates of 0.5 mL h−1 and 2 mL h−1, respectively—achieved total bromate reduction after 120 min of operation; however, 1% Pd/CF1 obtained total reduction as early as 30 min. Taking into account the catalyst properties, 1% Pd/CF1 showed a good catalytic activity due to CFs morphology obtained using a low electrospinning flow rate, while the Pd incorporation method allowed a high availability of active sites with hydrogenation properties for bromate reduction.
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9
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Wang B, Zhai Y, Li S, Li C, Zhu Y, Xu M. Catalytic enhancement of hydrogenation reduction and oxygen transfer reaction for perchlorate removal: A review. CHEMOSPHERE 2021; 284:131315. [PMID: 34323780 DOI: 10.1016/j.chemosphere.2021.131315] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 06/11/2021] [Accepted: 06/20/2021] [Indexed: 06/13/2023]
Abstract
Perchlorate is the main contaminant in surface water and groundwater, and it is of current urgency to remove due to its high water solubility, mobility, and endocrine-disrupting properties. The conversion of perchlorate into harmless chloride ions by using appropriate catalysts is the most promising and effective route to overcome its high activation energy and kinetic stability. Perchlorate is usually reduced in two ways: (1) indirect reduction via oxygen atom transfer (OAT) reaction or (2) hydrodeoxygenation through highly active reducing H atoms. This paper discusses the mechanisms underlying both the OAT reaction catalyzed by homogenous rhenium-oxo complexes or biological Mo-based enzymes and the heterogeneous hydrogenation for perchlorate reduction. Particular emphasis is placed on the factors affecting the catalytic process and the synergy between the (1) and (2) reactions. For completeness, the applicability of different electrolysis devices, electrodes, and bioreactors is also illustrated. Finally, this article gives prospects for the synthesis and application of catalysts in different pathways.
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Affiliation(s)
- Bei Wang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China
| | - Yunbo Zhai
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
| | - Shanhong Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China
| | - Caiting Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China
| | - Yun Zhu
- College of Electrical and Information Engineering, Hunan University, Changsha, 410082, China
| | - Min Xu
- Chinese Academy for Environmental Planning, Beijing, 100012, China.
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10
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Electrochemical study in acid aqueous solution and ex-situ X-ray photoelectron spectroscopy analysis of metallic rhenium surface. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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11
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Ren C, Yang P, Sun J, Bi EY, Gao J, Palmer J, Zhu M, Wu Y, Liu J. A Bioinspired Molybdenum Catalyst for Aqueous Perchlorate Reduction. J Am Chem Soc 2021; 143:7891-7896. [PMID: 34003633 DOI: 10.1021/jacs.1c00595] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Perchlorate (ClO4-) is a pervasive, harmful, and inert anion on both Earth and Mars. Current technologies for ClO4- reduction entail either harsh conditions or multicomponent enzymatic processes. Herein, we report a heterogeneous (L)Mo-Pd/C catalyst directly prepared from Na2MoO4, a bidentate nitrogen ligand (L), and Pd/C to reduce aqueous ClO4- into Cl- with 1 atm of H2 at room temperature. A suite of instrument characterizations and probing reactions suggest that the MoVI precursor and L at the optimal 1:1 ratio are transformed in situ into oligomeric MoIV active sites at the carbon-water interface. For each Mo site, the initial turnover frequency (TOF0) for oxygen atom transfer from ClOx- substrates reached 165 h-1. The turnover number (TON) reached 3840 after a single batch reduction of 100 mM ClO4-. This study provides a water-compatible, efficient, and robust catalyst to degrade and utilize ClO4- for water purification and space exploration.
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Affiliation(s)
- Changxu Ren
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Peng Yang
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Jiaonan Sun
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Eric Y Bi
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States.,Martin Luther King High School, Riverside, California 92508, United States
| | - Jinyu Gao
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Jacob Palmer
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Yiying Wu
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Jinyong Liu
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
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12
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Ren C, Liu J. Bioinspired Catalytic Reduction of Aqueous Perchlorate by One Single-Metal Site with High Stability against Oxidative Deactivation. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05276] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Changxu Ren
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Jinyong Liu
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
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13
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14
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Abstract
Organometallic chemistry and its applications in homogeneous catalysis have been dominated by mononuclear transition-metal complexes. The catalytic performance and physico-chemical properties of these mononuclear complexes can be rationally tuned by ligand modification, which has also led to the discovery of new reactions. There is a growing body of evidence implicating the participation of two metals in catalytic processes originally believed to follow monometallic mechanisms. Moreover, the deliberate preparation of bimetallic structures has proven popular because these preorganized structures have many tunable features, such as metal-metal bond order and polarity. These structures can exhibit metal-metal complementarity and allow for multisite activation - reactivity unattainable with truly mononuclear species. This Perspective summarizes the features that are exclusive to bimetallic systems and their roles in substrate activation.
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15
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Wang B, Zhai Y, Li S, Liu X, Wang T, Li C. Ultrafine Re/Pd nanoparticles on polydopamine modified carbon nanotubes for efficient perchlorate reduction and reusability. J Colloid Interface Sci 2020; 574:122-130. [PMID: 32305728 DOI: 10.1016/j.jcis.2020.04.052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/25/2020] [Accepted: 04/11/2020] [Indexed: 11/29/2022]
Abstract
This study synthesized nanocomposite catalysts via a modification of Re/Pd codoped carbon nanotubes (CNTs) with different concentrations of polydopamine (PDA), which were used for perchlorate (ClO4-) reduction. The loads, dispersion and reducibility of Re/Pd nanoparticles increased yet their particle sizes significantly decreased with the increase of PDA concentrations. The average diameter of Re/Pd codoped D2CNT (CNT modified by 2 mg/mL PDA) with a narrow size distribution was measured to be 2 nm. The ultrafine Re/Pd codoped D2CNT catalysts represented outstanding catalytic reduction activity for the conversion of ClO4- to Cl- with TOF of 17.34 h-1 under the room H2 atmospheric pressure, which was about 8 times than that of the unmodified catalysts. Furthermore, PDA modification minimized the dissociation of Re by chemical bonding between Re and CNTs carrier and maintained good stability of nanocomposite. This study inspires us to apply green bionic methods to enhance the catalytic reduction of perchlorate by changing the physical properties of Re/Pd nanoparticles.
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Affiliation(s)
- Bei Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yunbo Zhai
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Shanhong Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xiangmin Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Tengfei Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Caiting Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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16
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Ren C, Yang P, Gao J, Huo X, Min X, Bi EY, Liu Y, Wang Y, Zhu M, Liu J. Catalytic Reduction of Aqueous Chlorate With MoOx Immobilized on Pd/C. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02242] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Changxu Ren
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Peng Yang
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Jinyu Gao
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Xiangchen Huo
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Xiaopeng Min
- Department of Civil and Environmental Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, United States
| | - Eric Y. Bi
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
- Martin Luther King High School, Riverside, California 92508, United States
| | - Yiming Liu
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Yin Wang
- Department of Civil and Environmental Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, United States
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Jinyong Liu
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
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17
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Pap LG, Couldridge A, Arulsamy N, Hulley E. Electrostatic polarization of nonpolar substrates: a study of interactions between simple cations and Mo-bound N 2. Dalton Trans 2019; 48:11004-11017. [PMID: 31232399 DOI: 10.1039/c9dt01606f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although a great deal of catalytic studies have focused on covalent interactions between substrates and catalyst centers, recognition of the importance of noncovalent and ionic interactions is driving new approaches to catalyst design. Electrostatic interactions with simple cations (those with little covalency, such as alkali metals) play crucial roles in many catalytic processes, but these effects are challenging to study due to their complicated solvation and speciation behaviour. These effects are particularly difficult to study during cation-mediated reactions with weakly-polar or non-polar substrates. Dinitrogen is one of the most nonpolar substrates known to be affected by electrostatic interactions in both heterogeneous and homogeneous reactions but understanding the significance of these effects requires further exploration. To examine these effects systematically, a new multidentate ligand framework bearing pendent crown ethers has been developed and incorporated into a series of Mo(0)-based dinitrogen complexes. Prepared via both reduction and ligand substitution routes, the strength and impact of cation-N2 interactions have been studied experimentally (IR spectroscopy) and computationally. Although the smallest cation (Li+) has the largest impact on the ground-state heterobimetallic activation of N2, solvation interactions are highly competitive and result in low Li+-(N2)Mo binding affinities. Thus, although smaller cations can have the largest electronic impact on substrates, these interactions are also the least persistent.
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Affiliation(s)
- Levente G Pap
- Department of Chemistry, University of Wyoming, Dept. 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, USA.
| | - Adam Couldridge
- Department of Chemistry, University of Wyoming, Dept. 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, USA.
| | - Navamoney Arulsamy
- Department of Chemistry, University of Wyoming, Dept. 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, USA.
| | - Elliott Hulley
- Department of Chemistry, University of Wyoming, Dept. 3838, 1000 E. University Avenue, Laramie, Wyoming 82071, USA.
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18
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He L, Zhong Y, Yao F, Chen F, Xie T, Wu B, Hou K, Wang D, Li X, Yang Q. Biological perchlorate reduction: which electron donor we can choose? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:16906-16922. [PMID: 31020520 DOI: 10.1007/s11356-019-05074-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
Biological reduction is an effective method for removal of perchlorate (ClO4-), where perchlorate is transformed into chloride by perchlorate-reducing bacteria (PRB). An external electron donor is required for autotrophic and heterotrophic reduction of perchlorate. Therefore, plenty of suitable electron donors including organic (e.g., acetate, ethanol, carbohydrate, glycerol, methane) and inorganic (e.g., hydrogen, zero-valent iron, element sulfur, anthrahydroquinone) as well as the cathode have been used in biological reduction of perchlorate. This paper reviews the application of various electron donors in biological perchlorate reduction and their influences on treatment efficiency of perchlorate and biological activity of PRB. We discussed the criteria for selection of appropriate electron donor to provide a flexible strategy of electron donor choice for the bioremediation of perchlorate-contaminated water.
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Affiliation(s)
- Li He
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Yu Zhong
- Key Laboratory of Water Pollution Control Technology, Hunan Research Academy of Environmental Sciences, Changsha, 410004, People's Republic of China.
| | - Fubing Yao
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Fei Chen
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, China
| | - Ting Xie
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Bo Wu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Kunjie Hou
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
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19
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Shamir D, Meyerstein D, Zilbermann I, Burg A, Albo Y, Shames AI, Vainer R, Borojovich EJ, Yardeni G, Kornweitz H, Maimon E. Copper(II) catalyses the reduction of perchlorate by both formaldehyde and by dihydrogen in aqueous solutions. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1506114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Dror Shamir
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Dan Meyerstein
- Chemical Sciences Department, Ariel University, Ariel, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Israel Zilbermann
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ariela Burg
- Chemical Engineering Department, The Sami Shamoon College of Engineering, Beer-Sheva, Israel
| | - Yael Albo
- Department of Chemical Engineering, Biotechnology and Materials, Ariel University, Ariel, Israel
| | | | - Radion Vainer
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | | | - Guy Yardeni
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Haya Kornweitz
- Chemical Sciences Department, Ariel University, Ariel, Israel
| | - Eric Maimon
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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20
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Benjamini G, Bar‐Ziv R, Zidki T, Borojovich EJC, Yardeni G, Kornweitz H, Meyerstein D. Pd
0
‐ and Au
0
‐Nanoparticles Catalyze the Reduction of Perchlorate by ·C(CH
3
)
2
OH Radicals. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700654] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Gadi Benjamini
- Chemistry Department Ben‐Gurion University of the Negev 84105 Beer‐Sheva Israel
| | - Ronen Bar‐Ziv
- Chemistry Department Nuclear Research Centre Negev 84190 Beer‐Sheva Israel
| | - Tomer Zidki
- Chemical Sciences Department Ariel University 40700 Ariel Israel
- The Schlesinger Family Center for Compact Accelerators Radiation Sources and Applications Ariel University 40700 Ariel Israel
| | | | - Guy Yardeni
- Chemistry Department Nuclear Research Centre Negev 84190 Beer‐Sheva Israel
| | - Haya Kornweitz
- Chemical Sciences Department Ariel University 40700 Ariel Israel
| | - Dan Meyerstein
- Chemistry Department Ben‐Gurion University of the Negev 84105 Beer‐Sheva Israel
- Chemical Sciences Department Ariel University 40700 Ariel Israel
- The Schlesinger Family Center for Compact Accelerators Radiation Sources and Applications Ariel University 40700 Ariel Israel
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21
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Ford CL, Park YJ, Matson EM, Gordon Z, Fout AR. A bioinspired iron catalyst for nitrate and perchlorate reduction. Science 2017; 354:741-743. [PMID: 27846604 DOI: 10.1126/science.aah6886] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 10/11/2016] [Indexed: 01/25/2023]
Abstract
Nitrate and perchlorate have considerable use in technology, synthetic materials, and agriculture; as a result, they have become pervasive water pollutants. Industrial strategies to chemically reduce these oxyanions often require the use of harsh conditions, but microorganisms can efficiently reduce them enzymatically. We developed an iron catalyst inspired by the active sites of nitrate reductase and (per)chlorate reductase enzymes. The catalyst features a secondary coordination sphere that aids in oxyanion deoxygenation. Upon reduction of the oxyanions, an iron(III)-oxo is formed, which in the presence of protons and electrons regenerates the catalyst and releases water.
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Affiliation(s)
- Courtney L Ford
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA
| | - Yun Ji Park
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA
| | - Ellen M Matson
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA
| | - Zachary Gordon
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA
| | - Alison R Fout
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA.
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22
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Hutchison JM, Guest JS, Zilles JL. Evaluating the Development of Biocatalytic Technology for the Targeted Removal of Perchlorate from Drinking Water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:7178-7186. [PMID: 28497961 DOI: 10.1021/acs.est.7b00831] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Removing micropollutants is challenging in part because of their toxicity at low concentrations. A biocatalytic approach could harness the high affinity of enzymes for their substrates to address this challenge. The potential of biocatalysis relative to mature (nonselective ion exchange, selective ion exchange, and whole-cell biological reduction) and emerging (catalysis) perchlorate-removal technologies was evaluated through a quantitative sustainable design framework, and research objectives were prioritized to advance economic and environmental sustainability. In its current undeveloped state, the biocatalytic technology was approximately 1 order of magnitude higher in cost and environmental impact than nonselective ion exchange. Biocatalyst production was highly correlated with cost and impact. Realistic improvement scenarios targeting biocatalyst yield, biocatalyst immobilization for reuse, and elimination of an electron shuttle could reduce total costs to $0.034 m-3 and global warming potential (GWP) to 0.051 kg CO2 eq m-3: roughly 6.5% of cost and 7.3% of GWP of the background from drinking water treatment and competitive with the best performing technology, selective ion exchange. With less stringent perchlorate regulatory limits, ion exchange technologies had increased cost and impact, in contrast to biocatalytic and catalytic technologies. Targeted advances in biocatalysis could provide affordable and sustainable treatment options to protect the public from micropollutants.
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Affiliation(s)
- Justin M Hutchison
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jeremy S Guest
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Julie L Zilles
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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23
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Gupta N, Pant P, Gupta C, Goel P, Jain A, Anand S, Pundir A. Engineered magnetic nanoparticles as efficient sorbents for wastewater treatment: a review. ACTA ACUST UNITED AC 2017. [DOI: 10.1080/14328917.2017.1334846] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nikesh Gupta
- Special Centre for Nanosciences, Jawaharlal Nehru University, New Delhi, India
| | - Parul Pant
- Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
| | - Chetna Gupta
- Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
| | - Puneet Goel
- Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
| | - Astha Jain
- Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
| | - Sakshi Anand
- Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
| | - Anuj Pundir
- Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
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24
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Liu J, Su X, Han M, Wu D, Gray DL, Shapley JR, Werth CJ, Strathmann TJ. Ligand Design for Isomer-Selective Oxorhenium(V) Complex Synthesis. Inorg Chem 2017; 56:1757-1769. [DOI: 10.1021/acs.inorgchem.6b03076] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jinyong Liu
- Department of Chemical
and Environmental Engineering, University of California, Riverside, California 92521, United States
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Xiaoge Su
- Department
of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230000, China
| | | | - Dimao Wu
- Department of
Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | | | | | - Charles J. Werth
- Department of Civil, Architectural, and Environmental
Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Timothy J. Strathmann
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
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25
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Liu J, Han M, Wu D, Chen X, Choe JK, Werth CJ, Strathmann TJ. A New Bioinspired Perchlorate Reduction Catalyst with Significantly Enhanced Stability via Rational Tuning of Rhenium Coordination Chemistry and Heterogeneous Reaction Pathway. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:5874-5881. [PMID: 27182602 DOI: 10.1021/acs.est.6b00886] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Rapid reduction of aqueous ClO4(-) to Cl(-) by H2 has been realized by a heterogeneous Re(hoz)2-Pd/C catalyst integrating Re(O)(hoz)2Cl complex (hoz = oxazolinyl-phenolato bidentate ligand) and Pd nanoparticles on carbon support, but ClOx(-) intermediates formed during reactions with concentrated ClO4(-) promote irreversible Re complex decomposition and catalyst deactivation. The original catalyst design mimics the microbial ClO4(-) reductase, which integrates Mo(MGD)2 complex (MGD = molybdopterin guanine dinucleotide) for oxygen atom transfer (OAT). Perchlorate-reducing microorganisms employ a separate enzyme, chlorite dismutase, to prevent accumulation of the destructive ClO2(-) intermediate. The structural intricacy of MGD ligand and the two-enzyme mechanism for microbial ClO4(-) reduction inspired us to improve catalyst stability by rationally tuning Re ligand structure and adding a ClOx(-) scavenger. Two new Re complexes, Re(O)(htz)2Cl and Re(O)(hoz)(htz)Cl (htz = thiazolinyl-phenolato bidentate ligand), significantly mitigate Re complex decomposition by slightly lowering the OAT activity when immobilized in Pd/C. Further stability enhancement is then obtained by switching the nanoparticles from Pd to Rh, which exhibits high reactivity with ClOx(-) intermediates and thus prevents their deactivating reaction with the Re complex. Compared to Re(hoz)2-Pd/C, the new Re(hoz)(htz)-Rh/C catalyst exhibits similar ClO4(-) reduction activity but superior stability, evidenced by a decrease of Re leaching from 37% to 0.25% and stability of surface Re speciation following the treatment of a concentrated "challenge" solution containing 1000 ppm of ClO4(-). This work demonstrates the pivotal roles of coordination chemistry control and tuning of individual catalyst components for achieving both high activity and stability in environmental catalyst applications.
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Affiliation(s)
- Jinyong Liu
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
- Department of Civil and Environmental Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Mengwei Han
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Dimao Wu
- Department of Chemistry and Biochemistry, The Ohio State University , Columbus, Ohio 43210, United States
| | - Xi Chen
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jong Kwon Choe
- Department of Civil and Environmental Engineering, Clarkson University , Potsdam, New York 13699, United States
| | - Charles J Werth
- Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin , Austin, Texas 78712, United States
| | - Timothy J Strathmann
- Department of Civil and Environmental Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
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26
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Liu J, Wu D, Su X, Han M, Kimura SY, Gray DL, Shapley JR, Abu-Omar MM, Werth CJ, Strathmann TJ. Configuration Control in the Synthesis of Homo- and Heteroleptic Bis(oxazolinylphenolato/thiazolinylphenolato) Chelate Ligand Complexes of Oxorhenium(V): Isomer Effect on Ancillary Ligand Exchange Dynamics and Implications for Perchlorate Reduction Catalysis. Inorg Chem 2016; 55:2597-611. [DOI: 10.1021/acs.inorgchem.5b02940] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jinyong Liu
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Dimao Wu
- Department
of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Xiaoge Su
- Pure Storage Inc., Mountain View, California 94041, United States
| | | | | | | | | | - Mahdi M. Abu-Omar
- Department of Chemistry and School of Chemical
Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Charles J. Werth
- Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Timothy J. Strathmann
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
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27
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Abstract
The ever-increasing human demand for safe and clean water is gradually pushing conventional water treatment technologies to their limits. It is now a popular perception that the solutions to the existing and future water challenges will hinge upon further developments in nanomaterial sciences. The concept of rational design emphasizes on 'design-for-purpose' and it necessitates a scientifically clear problem definition to initiate the nanomaterial design. The field of rational design of nanomaterials for water treatment has experienced a significant growth in the past decade and is poised to make its contribution in creating advanced next-generation water treatment technologies in the years to come. Within the water treatment context, this review offers a comprehensive and in-depth overview of the latest progress in rational design, synthesis and applications of nanomaterials in adsorption, chemical oxidation and reduction reactions, membrane-based separation, oil-water separation, and synergistic multifunctional all-in-one nanomaterials/nanodevices. Special attention is paid to the chemical concepts related to nanomaterial design throughout the review.
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Affiliation(s)
- Renyuan Li
- Water Desalination and Reuse Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
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28
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Liu J, Chen X, Wang Y, Strathmann TJ, Werth CJ. Mechanism and Mitigation of the Decomposition of an Oxorhenium Complex-Based Heterogeneous Catalyst for Perchlorate Reduction in Water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:12932-12940. [PMID: 26422179 DOI: 10.1021/acs.est.5b03393] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A biomimetic heterogeneous catalyst combining palladium nanoparticles and an organic ligand-coordinated oxorhenium complex on activated carbon, Re(hoz)2-Pd/C, was previously developed and shown to reduce aqueous perchlorate (ClO4-) with H2 at a rate ∼100 times faster than the first generation ReOx-Pd/C catalyst prepared from perrhenate (ReO4-). However, the immobilized Re(hoz)2 complex was shown to partially decompose and leach into water as ReO4-, leading to an irreversible loss of catalytic activity. In this work, the stability of the immobilized Re(hoz)2 complex is shown to depend on kinetic competition between three processes: (1) ReV(hoz)2 oxidation by ClO4- and its reduction intermediates ClOx-, (2) ReVII(hoz)2 reduction by Pd-activated hydrogen, and (3) hydrolytic ReVII(hoz)2 decomposition. When ReV(hoz)2 oxidation is faster than ReVII(hoz)2 reduction, the ReVII(hoz)2 concentration builds up and leads to hydrolytic decomposition to ReO4- and free hoz ligand. Rapid ReV(hoz)2 oxidation is mainly promoted by highly reactive ClOx- formed from the reduction of ClO4-. To mitigate Re(hoz)2 decomposition and preserve catalytic activity, ruthenium (Ru) and rhodium (Rh) were evaluated as alternative H2 activators to Pd. Rh showed superior activity for reducing the ClO3- intermediate to Cl-, thereby preventing ClOx- buildup and lowering Re complex decomposition in the Re(hoz)2-Rh/C catalyst. In contrast, Ru showed the lowest ClO3- reduction activity and resulted in the most Re(hoz)2 decomposition among the Re(hoz)2-M/C catalysts. This work highlights the importance of using mechanistic insights from kinetic and spectroscopic tests to rationally design water treatment catalysts for enhanced performance and stability.
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Affiliation(s)
- Jinyong Liu
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
- Department of Civil and Environmental Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Xi Chen
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Yin Wang
- Department of Civil and Environmental Engineering, University of Wisconsin-Milwaukee , Milwaukee, Wisconsin 53211, United States
| | - Timothy J Strathmann
- Department of Civil and Environmental Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Charles J Werth
- Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin , Austin, Texas 78712, United States
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