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Xu H, Wang X, Zhang Y, Shi L, Wu X, Liu Y, Wu Z. Highly Selective Nitrite Hydrogenation to Ammonia over Iridium Nanoclusters: Competitive Adsorption Mechanism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:14091-14099. [PMID: 37643464 DOI: 10.1021/acs.est.3c04351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Wet denitrification is a promising approach to control nitrogen oxides (NOx) produced in fossil fuel combustion. Yet, the highly concentrated nitrite (NO2-) wastewater generated poses a major threat to the aqueous environment. Here, iridium nanoclusters (d = 1.63 nm) deposited on TiO2 were applied for NO2- reduction to ammonia (NRA), showing an exceptional NH4+ selectivity of 95% and a production rate of 20.51 mgN·L-1·h-1, which held significant potential for NO2- wastewater purification and ammonia resource recovery. Notably, an interesting non-first-order NO2- hydrogenation kinetics was observed, which was further confirmed to result from the competitive adsorption mechanism between H2 and NO2- over iridium. The NRA pathways on the Ir(111) surface were explored via density functional theory calculations with the NO2-* → NO* → HNO* → HNOH* → H2NOH* → NH2* → NH3* identified as the most energetically favorable pathway and the NO* → HNO* confirmed as the rate-determining step. In situ DRIFTS further experimentally verified the generation of HNO* intermediate during NO* hydrogenation on Ir(111). To verify NRA kinetics at varied NO2- concentrations or H2 pressures, a kinetic model was derived based on the Langmuir-Hinshelwood competitive adsorption mechanism. These findings provide mechanistic insights into the NRA pathways on Ir nanocatalysts, which will be beneficial for wet denitrification waste stream decontamination and valorization.
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Affiliation(s)
- Huimin Xu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Xiaoqiang Wang
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314033, China
| | - Yaoyu Zhang
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Le Shi
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Xuanhao Wu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Yue Liu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Zhongbiao Wu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
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2
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Levi J, Guo S, Kavadiya S, Luo Y, Lee CS, Jacobs HP, Holman Z, Wong MS, Garcia-Segura S, Zhou C, Rittmann BE, Westerhoff P. Comparing methods to deposit Pd-In catalysts on hydrogen-permeable hollow-fiber membranes for nitrate reduction. WATER RESEARCH 2023; 235:119877. [PMID: 36989800 DOI: 10.1016/j.watres.2023.119877] [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: 10/11/2022] [Revised: 03/04/2023] [Accepted: 03/12/2023] [Indexed: 06/19/2023]
Abstract
Catalytic hydrogenation of nitrate in water has been studied primarily using nanoparticle slurries with constant hydrogen-gas (H2) bubbling. Such slurry reactors are impractical in full-scale water treatment applications because 1) unattached catalysts are difficult to be recycled/reused and 2) gas bubbling is inefficient for delivering H2. Membrane Catalyst-film Reactors (MCfR) resolve these limitations by depositing nanocatalysts on the exterior of gas-permeable hollow-fiber membranes that deliver H2 directly to the catalyst-film. The goal of this study was to compare the technical feasibility and benefits of various methods for attaching bimetallic palladium/indium (Pd/In) nanocatalysts for nitrate reduction in water, and subsequently select the most effective method. Four Pd/In deposition methods were evaluated for effectiveness in achieving durable nanocatalyst immobilization on the membranes and repeatable nitrate-reduction activity: (1) In-Situ MCfR-H2, (2) In-Situ Flask-Synthesis, (3) Ex-Situ Aerosol Impaction-Driven Assembly, and (4) Ex-Situ Electrostatic. Although all four deposition methods achieved catalyst-films that reduced nitrate in solution (≥ 1.1 min-1gPd-1), three deposition methods resulted in significant palladium loss (>29%) and an accompanying decline in nitrate reactivity over time. In contrast, the In-Situ MCfR-H2 deposition method had negligible Pd loss and remained active for nitrate reduction over multiple operational cycles. Therefore, In-Situ MCfR-H2 emerged as the superior deposition method and can be utilized to optimize catalyst attachment, nitrate-reduction, and N2 selectivity in future studies with more complex water matrices, longer treatment cycles, and larger reactors.
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Affiliation(s)
- Juliana Levi
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States; Biodesign Swette Center for Environmental Biotechnology, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Sujin Guo
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Shalinee Kavadiya
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Yihao Luo
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States; Biodesign Swette Center for Environmental Biotechnology, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Chung-Seop Lee
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Hunter P Jacobs
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Zachary Holman
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Michael S Wong
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Sergi Garcia-Segura
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Chen Zhou
- Biodesign Swette Center for Environmental Biotechnology, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Bruce E Rittmann
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States; Biodesign Swette Center for Environmental Biotechnology, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Paul Westerhoff
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-3005, United States.
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3
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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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4
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Bian X, Shi F, Li J, Liang J, Bao C, Zhang H, Jia J, Li K. Highly selective electrocatalytic reduction of nitrate to nitrogen in a chloride ion-free system by promoting kinetic mass transfer of intermediate products in a novel Pd-Cu adsorption confined cathode. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116405. [PMID: 36352730 DOI: 10.1016/j.jenvman.2022.116405] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 09/22/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
The mass transfer on the catalyst surface has a great influence on the selectivity of electrocatalytic nitrate reduction to nitrogen. In this study, a Pd-Cu adsorption confined nickel foam cathode is designed in the absence of both proton exchange membranes and chloride ions. The repulsion of the cathode enables intermediate products such as nitrite to accumulate in the confined region, resulting in an increase in the possibility of a second-order reaction to form nitrogen. The system can obtain more than 92% continuous N2 selectivity when it is used to treat 200 mg L-1 NO3--N under a current density of 8 mA cm-2, which is not only higher than those of semiconfined and nonconfined systems but also significantly better than the results obtained by Pd-Cu directly modified cathodes prepared by electrodeposition or impregnation. It is found that a high initial nitrate concentration and low current density are more beneficial for the accumulation of intermediates on Pd-Cu catalysts, thus improving the formation of nitrogen. A mechanism study reveals that the intermediates can completely occupy the active sites on the surface of Pd, avoiding the generation of active hydrogen, and therefore inhibiting the first-order reaction to produce ammonia. Moreover, the reducibility of Pd-Cu can also be gradually improved under the function of the cathode so that the system exhibits good stability. This study demonstrates an environmentally friendly and promising method for total nitrogen removal from industrial wastewater with high conductivity.
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Affiliation(s)
- Xingchen Bian
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai, 200240, PR China
| | - Feng Shi
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai, 200240, PR China
| | - Jingdong Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai, 200240, PR China
| | - Jianxing Liang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai, 200240, PR China
| | - Chenyu Bao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai, 200240, PR China
| | - Hongbo Zhang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, PR China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Jinping Jia
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai, 200240, PR China; Shanghai Key Laboratory of Hydrogen Science & Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Kan Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai, 200240, PR China; Shanghai Key Laboratory of Hydrogen Science & Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
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5
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Jhao YJ, Chu LK. Comparing the Reactivities of Methanol and Methanediol in the Photolysis of Aqueous Nitrite Solution. J Phys Chem A 2022; 126:8233-8239. [DOI: 10.1021/acs.jpca.2c06467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yuan-Jyun Jhao
- Department of Chemistry, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Road, Hsinchu300044, Taiwan
| | - Li-Kang Chu
- Department of Chemistry, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Road, Hsinchu300044, Taiwan
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6
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Wang C, Zhang Y, Luo H, Zhang H, Li W, Zhang WX, Yang J. Iron-Based Nanocatalysts for Electrochemical Nitrate Reduction. SMALL METHODS 2022; 6:e2200790. [PMID: 36103612 DOI: 10.1002/smtd.202200790] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/28/2022] [Indexed: 06/15/2023]
Abstract
Nitrate has a high level of stability and persistence in water, endangering human health and aquatic ecosystems. Due to its high reliability and efficiency, the electrochemical nitrate reduction reaction (NO3 RR) is regarded as the best available option for mitigating excess nitrate in water and wastewater, especially for the removal of trace levels of nitrate. One of the most critical factors in the electrochemical reduction are the catalysts, which directly affect the reaction efficiency of nitrate removal. Iron-based nanocatalysts, which have the advantages of nontoxicity, wide availability, and low cost, have emerged as a promising electrochemical NO3 RR material in recent years. This review covers major aspects of iron-based nanocatalysts for electrochemical NO3 RR, including synthetic methods, structural design, performance enhancement, electrocatalytic nitrate reduction test, and reduction mechanism. The recent progress of iron-based nanocatalysts for electrochemical NO3 RR and the mechanism of functional advantages for modified structures are reviewed from the perspectives of loading, doping, and assembly strategies, in order to realize the conversion from pollutant nitrate to harmless nitrogen or ammonia and other sustainable products. Finally, challenges and future directions for the development of low-cost and highly-efficient iron-based nanocatalysts are explored.
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Affiliation(s)
- Chuqi Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Yingbing Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Hongxia Luo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Hui Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Wei Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, China
| | - Wei-Xian Zhang
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, P. R. China
| | - Jianping Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
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7
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Huang P, Yan Y, Banerjee A, Lefferts L, Wang B, Faria Albanese JA. Proton shuttling flattens the energy landscape of nitrite catalytic reduction. J Catal 2022. [DOI: 10.1016/j.jcat.2022.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Rayner PJ, Fekete M, Gater CA, Ahwal F, Turner N, Kennerley AJ, Duckett SB. Real-Time High-Sensitivity Reaction Monitoring of Important Nitrogen-Cycle Synthons by 15N Hyperpolarized Nuclear Magnetic Resonance. J Am Chem Soc 2022; 144:8756-8769. [PMID: 35508182 PMCID: PMC9121385 DOI: 10.1021/jacs.2c02619] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Here, we show how
signal amplification by reversible exchange hyperpolarization
of a range of 15N-containing synthons can be used to enable
studies of their reactivity by 15N nuclear magnetic resonance
(NO2– (28% polarization), ND3 (3%), PhCH2NH2 (5%), NaN3 (3%),
and NO3– (0.1%)). A range of iridium-based
spin-polarization transfer catalysts are used, which for NO2– work optimally as an amino-derived carbene-containing
complex with a DMAP-d2 coligand. We harness
long 15N spin-order lifetimes to probe in situ reactivity
out to 3 × T1. In the case of NO2– (T1 17.7 s
at 9.4 T), we monitor PhNH2 diazotization in acidic solution.
The resulting diazonium salt (15N-T1 38 s) forms within 30 s, and its subsequent reaction with
NaN3 leads to the detection of hyperpolarized PhN3 (T1 192 s) in a second step via the
formation of an identified cyclic pentazole intermediate. The role
of PhN3 and NaN3 in copper-free click chemistry
is exemplified for hyperpolarized triazole (T1 < 10 s) formation when they react with a strained alkyne.
We also demonstrate simple routes to hyperpolarized N2 in
addition to showing how utilization of 15N-polarized PhCH2NH2 enables the probing of amidation, sulfonamidation,
and imine formation. Hyperpolarized ND3 is used to probe
imine and ND4+ (T1 33.6 s) formation. Furthermore, for NO2–, we also demonstrate how the 15N-magnetic resonance imaging
monitoring of biphasic catalysis confirms the successful preparation
of an aqueous bolus of hyperpolarized 15NO2– in seconds with 8% polarization. Hence, we create
a versatile tool to probe organic transformations that has significant
relevance for the synthesis of future hyperpolarized pharmaceuticals.
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Affiliation(s)
- Peter J Rayner
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Marianna Fekete
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Callum A Gater
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Fadi Ahwal
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Norman Turner
- Department of Engineering and Technology, University of Huddersfield, Queensgate, Huddersfield, West Yorkshire HD1 3DH, U.K
| | - Aneurin J Kennerley
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Simon B Duckett
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
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9
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Promoting interspecies hydrogen/electron transfer in Bio-PdNPs-mediated denitrification with the selectivity towards N2. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108395] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Enes da Silva MJ, Banerjee A, Lefferts L, Albanese JAF. In‐situ ATR‐IR Spectroscopy Reveals Complex Absorption‐Diffusion Dynamics in Model Polymer‐Membrane‐Catalyst Assemblies (PCMA). ChemCatChem 2022. [DOI: 10.1002/cctc.202101835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maria Joao Enes da Silva
- University of Twente Institute for Nanotechnology: Universiteit Twente MESA+ Catalytic Processes and Materials Group NETHERLANDS
| | - Aayan Banerjee
- University of Twente Institute for Nanotechnology: Universiteit Twente MESA+ Catalytic Processes and Materials Group NETHERLANDS
| | - Leon Lefferts
- University of Twente Institute for Nanotechnology: Universiteit Twente MESA+ Catalytic Processes and Materials Group NETHERLANDS
| | - Jimmy Alexander Faria Albanese
- Universiteit Twente MESA+ Faculty of Science and Technology Drienerlolaan 5Meander ME361Netherlands 7522NB Enschede NETHERLANDS
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11
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Suss M, Zhang Y, Atlas I, Gendel Y, Ruck E, Presser V. Emerging, hydrogen-driven electrochemical water purification. Electrochem commun 2022. [DOI: 10.1016/j.elecom.2022.107211] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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12
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Xu P, Agarwal S, Lefferts L. Formic acid generating in-situ H2 and CO2 for nitrite reduction in aqueous phase. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01448j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this work is to explore and to understand the effect of pH, concentrations and presence of oxygen traces on reduction nitrite in drinking water with Pd/γ-Al2O3, using...
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13
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Varapragasam SP, Andriolo JM, Skinner JL, Grumstrup EM. Photocatalytic Reduction of Aqueous Nitrate with Hybrid Ag/g-C 3N 4 under Ultraviolet and Visible Light. ACS OMEGA 2021; 6:34850-34856. [PMID: 34963968 PMCID: PMC8697391 DOI: 10.1021/acsomega.1c05523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/26/2021] [Indexed: 06/14/2023]
Abstract
The concentration of nitrate in natural surface waters by agricultural runoff remains a challenging problem in environmental chemistry. One promising denitrification strategy is to utilize photocatalysts, whose light-driven excited states are capable of reducing nitrate to nitrogen gas. We have synthesized and characterized pristine and silver-loaded graphitic carbon nitrides and assessed their activity for photocatalytic nitrate reduction at neutral pH. While nitrate reduction does occur on the pristine material, the silver cocatalyst greatly enhances product yields. Kinetic studies performed in batch photoreactors under both UV and visible excitation suggest that nitrate reduction to produce aqueous nitrite, ammonium, and nitrogen gas proceeds via a cooperative water reduction on the silver metal domains to produce adsorbed H atoms. By varying the percentage of silver loading onto the g-C3N4, the density of metal domains can be adjusted, which in turn tunes the reduction selectivity toward various products.
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Affiliation(s)
- Shelton
J. P. Varapragasam
- Department
of Chemistry and Biochemistry, Montana State
University, Bozeman, Montana 59717, United States
| | - Jessica M. Andriolo
- Department
of Mechanical Engineering, Montana Technological
University, Butte, Montana 59701, United
States
| | - Jack L. Skinner
- Department
of Mechanical Engineering, Montana Technological
University, Butte, Montana 59701, United
States
| | - Erik M. Grumstrup
- Department
of Chemistry and Biochemistry, Montana State
University, Bozeman, Montana 59717, United States
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14
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Parvulescu VI, Epron F, Garcia H, Granger P. Recent Progress and Prospects in Catalytic Water Treatment. Chem Rev 2021; 122:2981-3121. [PMID: 34874709 DOI: 10.1021/acs.chemrev.1c00527] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Presently, conventional technologies in water treatment are not efficient enough to completely mineralize refractory water contaminants. In this context, the implementation of catalytic processes could be an alternative. Despite the advantages provided in terms of kinetics of transformation, selectivity, and energy saving, numerous attempts have not yet led to implementation at an industrial scale. This review examines investigations at different scales for which controversies and limitations must be solved to bridge the gap between fundamentals and practical developments. Particular attention has been paid to the development of solar-driven catalytic technologies and some other emerging processes, such as microwave assisted catalysis, plasma-catalytic processes, or biocatalytic remediation, taking into account their specific advantages and the drawbacks. Challenges for which a better understanding related to the complexity of the systems and the coexistence of various solid-liquid-gas interfaces have been identified.
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Affiliation(s)
- Vasile I Parvulescu
- Department of Organic Chemistry, Biochemistry and Catalysis, University of Bucharest, B-dul Regina Elisabeta 4-12, Bucharest 030016, Romania
| | - Florence Epron
- Université de Poitiers, CNRS UMR 7285, Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 9, France
| | - Hermenegildo Garcia
- Instituto Universitario de Tecnología Química, Universitat Politecnica de Valencia-Consejo Superior de Investigaciones Científicas, Universitat Politencia de Valencia, Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Pascal Granger
- CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Univ. Lille, F-59000 Lille, France
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15
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da Silva MJE, Lefferts L, Faria Albanese JA. N-isopropylacrylamide polymer brushes alter the micro-solvation environment during aqueous nitrite hydrogenation on Pd/Al2O3 catalyst. J Catal 2021. [DOI: 10.1016/j.jcat.2021.08.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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17
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Pappaterra M, Xu P, van der Meer W, Faria JA, Fernandez Rivas D. Cavitation intensifying bags improve ultrasonic advanced oxidation with Pd/Al 2O 3 catalyst. ULTRASONICS SONOCHEMISTRY 2021; 70:105324. [PMID: 32947211 PMCID: PMC7786540 DOI: 10.1016/j.ultsonch.2020.105324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/26/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
Advanced oxidation processes can potentially eliminate organic contaminants from industrial waste streams as well as persistent pharmaceutical components in drinking water. We explore for the first time the utilization of Cavitation Intensifying Bags (CIB) in combination with Pd/Al2O3 catalyst as possible advanced oxidation technology for wastewater streams, oxidizing terephthalic acid (TA) to 2-hydroxyterephthalic acid (HTA). The detailed characterization of this novel reaction system reveals that, during sonication, the presence of surface pits of the CIB improves the reproducibility and thus the control of the sonication process, when compared to oxidation in non-pitted bags. Detailed reaction kinetics shows that in the CIB reactor the reaction order to TA is zero, which is attributed to the large excess of TA in the system. The rate of HTA formation increased ten-fold from ~0.01 μM*min-1 during sonication in the CIB, to ~0.10 μM*min-1 for CIB in the presence of the Pd/Al2O3 catalyst. This enhancement was ascribed to a combination of improved mass transport, the creation of thermal gradients, and Pd/Al2O3 catalyst near the cavitating bubbles. Further analysis of the kinetics of HTA formation on Pd/Al2O3 indicated that initially the reaction underwent through an induction period of 20 min, where the HTA concentration was ~0.3 μM. After this, the reaction rate increased reaching HTA concentrations ~6 μM after 40 min. This behavior resembled that observed during oxidation of hydrocarbons on metal catalysts, where the slow rate formation of hydroperoxides on the metal surface is followed by rapid product formation upon reaching a critical concentration. Finally, a global analysis using the Intensification Factor (IF) reveals that CIB in combination with the Pd/Al2O3 catalyst is a desirable option for the oxidation of TA when considering increased oxidation rates and costs.
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Affiliation(s)
- Maria Pappaterra
- Mesoscale Chemical Systems Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, and University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands; Delft University of Technology, Delft, The Netherlands
| | - Pengyu Xu
- Catalytic Processes and Materials Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
| | - Walter van der Meer
- Oasen Water Company, PO BOX 122, 2800 AC Gouda, The Netherlands; Membranes Science and Technology, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Jimmy A Faria
- Catalytic Processes and Materials Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands.
| | - David Fernandez Rivas
- Mesoscale Chemical Systems Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, and University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands.
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Troutman JP, Li H, Haddix AM, Kienzle BA, Henkelman G, Humphrey SM, Werth CJ. PdAg Alloy Nanocatalysts: Toward Economically Viable Nitrite Reduction in Drinking Water. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01538] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jacob P. Troutman
- Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, 301 East Dean Keeton Street, Stop C1700, Austin, Texas 78712, United States
- Department of Chemistry, The University of Texas at Austin, 100 East 24th Street, Stop A1590, Austin, Texas 78712, United States
| | - Hao Li
- Department of Chemistry, The University of Texas at Austin, 100 East 24th Street, Stop A1590, Austin, Texas 78712, United States
| | - Alison M. Haddix
- Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, 301 East Dean Keeton Street, Stop C1700, Austin, Texas 78712, United States
| | - Benjamin A. Kienzle
- Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, 301 East Dean Keeton Street, Stop C1700, Austin, Texas 78712, United States
| | - Graeme Henkelman
- Department of Chemistry, The University of Texas at Austin, 100 East 24th Street, Stop A1590, Austin, Texas 78712, United States
| | - Simon M. Humphrey
- Department of Chemistry, The University of Texas at Austin, 100 East 24th Street, Stop A1590, Austin, Texas 78712, United States
| | - Charles J. Werth
- Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, 301 East Dean Keeton Street, Stop C1700, Austin, Texas 78712, United States
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