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Xue Y, Wang X, Liu Q, Feng M, Ding Z, Chu J, Zhu W, Liu N, Li Z. In situ electro-generated Ni(OH) 2 synergistic with Cu cathode to promote direct ammonia oxidation to nitrogen. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2024; 90:225-237. [PMID: 39007316 DOI: 10.2166/wst.2024.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 06/07/2024] [Indexed: 07/16/2024]
Abstract
To solve the problem of low removal rate and poor N2 selectivity in direct electrochemical ammonia oxidation (EAO), commercial Ni foam and Cu foam were used as anode and cathode of the EAO system, respectively. The coupling effect between the cathode and anode promoted nitrogen cycling during the reaction process, which improved N2 selectivity of the reaction system and promoted it to achieve a high ammonia removal rate. This study showed that the thin Ni(OH)2 with oxygen vacancy formed on the surface of Ni foam anode played an effective role in the dimerization of intermediate products in ammonia oxidation to form N2. This electrochemical system was used to treat real goose wastewater containing 422.5 mg/L NH4+-N and 94.5 mg/L total organic carbon (TOC). After treatment, this electrochemical system achieved good performance with an ammonia removal rate of 87%, N2 selectivity of 77%, and TOC removal rate of 72%. Therefore, this simple and efficient system with Ni foam anode and Cu foam cathode is a promising method for treating ammonia nitrogen wastewater.
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Affiliation(s)
- Yuzhou Xue
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China E-mail:
| | - Xuanxuan Wang
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Qing Liu
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Mengru Feng
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Zimo Ding
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Jiayue Chu
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Wenyan Zhu
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Na Liu
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Zhichun Li
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
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2
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Mann DS, Kwon SN, Thakur S, Patil P, Jeong KU, Na SI. Suppressing Redox Reactions at the Perovskite-Nickel Oxide Interface with Zinc Nitride to Improve the Performance of Perovskite Solar Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311362. [PMID: 38192000 DOI: 10.1002/smll.202311362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/15/2023] [Indexed: 01/10/2024]
Abstract
For p-i-n perovskite solar cells (PSCs), nickel oxide (NiOx) hole transport layers (HTLs) are the preferred interfacial layer due to their low cost, high mobility, high transmittance, and stability. However, the redox reaction between the Ni≥3+ and hydroxyl groups in the NiOx and perovskite layer leads to oxidized CH3NH3 + and reacts with PbI in the perovskite, resulting in a large number of non-radiative recombination sites. Among various transition metals, an ultra-thin zinc nitride (Zn3N2) layer on the NiOx surface is chosen to prevent these redox reactions and interfacial issues using a simple solution process at low temperatures. The redox reaction and non-radiative recombination at the interface of the perovskite and NiOx reduce chemically by using interface modifier Zn3N2 to reduce hydroxyl group and defects on the surface of NiOx. A thin layer of Zn3N2 at the NiOx/perovskite interface results in a high Ni3+/Ni2+ ratio and a significant work function (WF), which inhibits the redox reaction and provides a highly aligned energy level with perovskite crystal and rigorous trap-passivation ability. Consequently, Zn3N2-modified NiOx-based PSCs achieve a champion PCE of 21.61%, over the NiOx-based PSCs. After Zn3N2 modification, the PSC can improve stability under several conditions.
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Affiliation(s)
- Dilpreet Singh Mann
- Department of Flexible and Printable Electronics and LANL-JBNU Engineering Institute-Korea, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, 54896, Republic of Korea
| | - Sung-Nam Kwon
- Department of Flexible and Printable Electronics and LANL-JBNU Engineering Institute-Korea, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, 54896, Republic of Korea
| | - Sakshi Thakur
- Department of Flexible and Printable Electronics and LANL-JBNU Engineering Institute-Korea, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, 54896, Republic of Korea
| | - Pramila Patil
- Department of Flexible and Printable Electronics and LANL-JBNU Engineering Institute-Korea, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, 54896, Republic of Korea
| | - Kwang-Un Jeong
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju-si, 54896, Republic of Korea
| | - Seok-In Na
- Department of Flexible and Printable Electronics and LANL-JBNU Engineering Institute-Korea, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, 54896, Republic of Korea
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Yin X, Wen J, Zhao J, An R, Zhang R, Xiong Y, Tao Y, Wang L, Liu Y, Zhou H, Huang Y. The Enhanced Performance of NiCuOOH/NiCu(OH) 2 Electrode Using Pre-Conversion Treatment for the Electrochemical Oxidation of Ammonia. Molecules 2024; 29:2339. [PMID: 38792200 PMCID: PMC11124015 DOI: 10.3390/molecules29102339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/09/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024] Open
Abstract
Electrochemical oxidation of ammonia is an attractive process for wastewater treatment, hydrogen production, and ammonia fuel cells. However, the sluggish kinetics of the anode reaction has limited its applications, leading to a high demand for novel electrocatalysts. Herein, the electrode with the in situ growth of NiCu(OH)2 was partially transformed into the NiCuOOH phase by a pre-treatment using highly oxidative solutions. As revealed by SEM, XPS, and electrochemical analysis, such a strategy maintained the 3D structure, while inducing more active sites before the in situ generation of oxyhydroxide sites during the electrochemical reaction. The optimized NiCuOOH-1 sample exhibited the current density of 6.06 mA cm-2 at 0.5 V, which is 1.67 times higher than that of NiCu(OH)2 (3.63 mA cm-2). Moreover, the sample with a higher crystalline degree of the NiCuOOH phase exhibited lower performance, demonstrating the importance of a moderate treatment condition. In addition, the NiCuOOH-1 sample presented low selectivity (<20%) towards NO2- and stable activity during the long-term operation. The findings of this study would provide valuable insights into the development of transition metal electrocatalysts for ammonia oxidation.
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Affiliation(s)
- Xuejiao Yin
- School of Architecture and Engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China
| | - Jiaxin Wen
- School of Architecture and Engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China
| | - Jujiao Zhao
- College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China; (J.Z.)
| | - Ran An
- College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China; (J.Z.)
| | - Ruolan Zhang
- College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China; (J.Z.)
| | - Yin Xiong
- Chongqing Baihan Wastewater Treatment Co., Ltd., Chongqing 400000, China; (Y.X.)
| | - Yanzong Tao
- Chongqing Baihan Wastewater Treatment Co., Ltd., Chongqing 400000, China; (Y.X.)
| | - Lingxin Wang
- School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Yuhang Liu
- School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Huanyu Zhou
- Green Intelligence Environmental School, Yangtze Normal University, Chongqing 408100, China
| | - Yuanyuan Huang
- Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China
- Chongqing Academy of Science and Technology, Chongqing 401120, China
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Hua R, Xu C, Yang H, Qu D, Zhang R, Liu D, Tang H, Li J, Qu D. Potassium-Hydrogen Hybrid Ion Alkaline Battery: A New Rechargeable Aqueous Battery Combined a K + Storage Cathode and an Electrochemical Hydrogen Storage Anode. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38597319 DOI: 10.1021/acsami.4c01499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
A rechargeable aqueous hybrid ion alkaline battery, using a proton and a potassium ion as charge carriers for the anode and cathode, respectively, is proposed in this study by using well-developed potassium nickel hexacyanoferrate as the cathode material and mesoporous carbon sheets as the anode material, respectively. The constructed battery operates in a concentrated KOH solution, in which the energy storage mechanism for potassium nickel hexacyanoferrate involves the redox reaction of Fe2+/Fe3+ associated with potassium ion insertion/extraction and the redox reaction of Ni(OH)2/NiOOH. The mechanism for the carbon anode is electrochemical hydrogen storage. The cathode made of potassium nickel hexacyanoferrate exhibits both an ultrahigh capacity of 232.7 mAh g-1 under 100 mA g-1 and a consistent performance of 214 mAh g-1 at 2000 mA g-1 (with a capacity retention of 92.8% after 200 cycles). The mesoporous carbon sheet anode exhibits a capacity of 87.6 mAh·g-1 at 100 mA g-1 with a good rate and cyclic performance. The full cell provides an operational voltage of 1.55 V, a capacity of 93.6 mAh g-1 at 100 mA g-1, and 82.4% capacity retention after 1000 cycles at 2000 mA g-1 along with a low self-discharge rate. The investigation and discussion about the energy storage mechanisms for both electrode materials are also provided.
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Affiliation(s)
- Ruiqing Hua
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, Hubei, P. R. China
| | - Caiyun Xu
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, Hubei, P. R. China
| | - Hongwei Yang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, Hubei, P. R. China
| | - Deyu Qu
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, Hubei, P. R. China
| | - Ruiming Zhang
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, P. R. China
| | - Dan Liu
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, Hubei, P. R. China
- Department of Mechanical Engineering, College of Engineering and Applied Science, University of Wisconsin-Milwaukee, 3200 N. Cramer Street, Milwaukee, Wisconsin 53211, United States
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, P. R. China
| | - Haolin Tang
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, Hubei, P. R. China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, P. R. China
| | - Junsheng Li
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, Hubei, P. R. China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, P. R. China
| | - Deyang Qu
- Department of Mechanical Engineering, College of Engineering and Applied Science, University of Wisconsin-Milwaukee, 3200 N. Cramer Street, Milwaukee, Wisconsin 53211, United States
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Wu L, Li Q, Dang K, Tang D, Chen C, Zhang Y, Zhao J. Highly Selective Ammonia Oxidation on BiVO 4 Photoanodes Co-catalyzed by Trace Amounts of Copper Ions. Angew Chem Int Ed Engl 2024; 63:e202316218. [PMID: 38069527 DOI: 10.1002/anie.202316218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Indexed: 12/20/2023]
Abstract
High-efficient photoelectrocatalytic direct ammonia oxidation reaction (AOR) conducted on semiconductor photoanodes remains a substantial challenge. Herein, we develop a strategy of simply introducing ppm levels of Cu ions (0.5-10 mg/L) into NH3 solutions to significantly improve the AOR photocurrent of bare BiVO4 photoanodes from 3.4 to 6.3 mA cm-2 at 1.23 VRHE , being close to the theoretical maximum photocurrent of BiVO4 (7.5 mA cm-2 ). The surface charge-separation efficiency has reached 90 % under a low bias of 0.8 VRHE . This AOR exhibits a high Faradaic efficiency (FE) of 93.8 % with the water oxidation reaction (WOR) being greatly suppressed. N2 is the main AOR product with FEs of 71.1 % in aqueous solutions and FEs of 100 % in non-aqueous solutions. Through mechanistic studies, we find that the formation of Cu-NH3 complexes possesses preferential adsorption on BiVO4 surfaces and efficiently competes with WOR. Meanwhile, the cooperation of BiVO4 surface effect and Cu-induced coordination effect activates N-H bonds and accelerates the first rate-limiting proton-coupled electron transfer for AOR. This simple strategy is further extended to other photoanodes and electrocatalysts.
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Affiliation(s)
- Lei Wu
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Qianqian Li
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Kun Dang
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Daojian Tang
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - ChunCheng Chen
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yuchao Zhang
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jincai Zhao
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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6
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Łuczak J, Lieder M. Nickel-based catalysts for electrolytic decomposition of ammonia towards hydrogen production. Adv Colloid Interface Sci 2023; 319:102963. [PMID: 37562247 DOI: 10.1016/j.cis.2023.102963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 07/05/2023] [Accepted: 07/11/2023] [Indexed: 08/12/2023]
Abstract
Nickel is an attractive metal for electrochemical applications because it is abundant, cheap, chemically resilient, and catalytically active towards many reactions. Nickel-based materials (metallic nickel, its alloys, oxides, hydroxides, and composites) have been also considered as promising electrocatalysts for ammonia oxidation. The electrolysis of ammonia aqueous solution results in evolution of gaseous hydrogen and nitrogen. Up to date studies showed that metallic Ni and Ni (hydro)oxides are not catalytically active unless they are electrochemically converted to NiOOH at ~1.3 V vs. RHE. Then, dehydrogenation of NH3 begins with electron coupled proton transfer to NiOOH resulting in a would-be reversible reduction of the latter to Ni(OH)2. Unlike the water electrolysis process, in which solely oxygen is obtained at the anode, during ammonia electrooxidation apart from release of N2, many undesired oxygenated nitrogen moieties may also turn up. These products appear after at least partial dehydrogenation of ammonia. Studies on NiOOH activity have been conducted for systems containing various modifiers, e.g., Cu, Co, S, P, however, their particular role in catalytic activity has not yet been elucidated. Nowadays research is being conducted in the direction of increasing the activity, selectivity, and stability of NiOOH. In this review, the electroactivity of Ni is analyzed and discussed in accordance with its oxidation states along with the ammonia oxidation mechanism. The main research problems to be solved and challenges for the future industrial use of ammonia are presented.
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Affiliation(s)
- Justyna Łuczak
- Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
| | - Marek Lieder
- Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
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7
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Jang Y, Ha S, Lim HT, Lee S. Facile route of fluorine incorporation into nickel (oxy)hydroxide for improving the oxygen evolution reaction. Chem Commun (Camb) 2023. [PMID: 37318519 DOI: 10.1039/d3cc02150e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Despite extensive development, oxygen evolution reaction (OER) catalysts still require significant overpotentials to function. In this study, we show that the overpotential of a nickel (Ni) electrode for the OER can decrease by about 100 mV with fluorine (F) incorporation, particularly by a facile electrochemical approach at room temperature.
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Affiliation(s)
- Yeongeun Jang
- Department of Chemical Engineering, Changwon National University, Changwon 51140, South Korea.
| | - Seungjoon Ha
- Department of Chemical Engineering, Changwon National University, Changwon 51140, South Korea.
| | - Hyung-Tae Lim
- Department of Materials Convergence System Engineering, Changwon National University, Changwon 51140, South Korea
| | - Seunghwa Lee
- Department of Chemical Engineering, Changwon National University, Changwon 51140, South Korea.
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Tsai MH, Juang Y, Hu CC, Hua LC, Mahata BK, Huang C. The direct electrocatalytic oxidation of ammonia by copper-deposited nickel foam catalysts. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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Hou J, Cheng Y, Pan H, Kang P. Tailored Bimetallic Ni-Sn Catalyst for Electrochemical Ammonia Oxidation to Dinitrogen with High Selectivity. Inorg Chem 2023; 62:3986-3992. [PMID: 36821791 DOI: 10.1021/acs.inorgchem.2c04440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Direct electrochemical ammonia oxidation reaction (eAOR) is an efficient and sustainable strategy to process wastewater containing ammonia, and it endures overoxidation and severely competitive oxygen evolution reaction (OER). Herein, we synthesized a Ni(OH)2/SnO2 composite catalyst by a multistep strategy and applied it to the eAOR process. Ni(OH)2/SnO2 exhibited a N2-N Faradaic efficiency (FEN2-N) of 84.2%, with a N2 partial current density (jN2-N) of 2.7 mA cm-2 at 1.55 V vs reversible hydrogen electrode (RHE) in 0.5 M K2SO4 with 10 mM NH3-N (pH 11). The oxophilic Sn promoted NH3 absorption on Ni sites while suppressing the OER. As the active species, NiOOH accelerated the dimerization of intermediates (*NH2 or *NH) to form N2.
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Affiliation(s)
- Jing Hou
- School of Chemical Engineering and Technology, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
| | - Yingying Cheng
- School of Chemical Engineering and Technology, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
| | - Hui Pan
- School of Chemical Engineering and Technology, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
| | - Peng Kang
- School of Chemical Engineering and Technology, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
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Han Y, Gao YK, Wang BJ, Zhang X, Chu GW, Luo Y, Chen JF. Highly Efficient Monolithic Catalyst with Excellent Adhesion of SiO 2 Coating for Catalytic Hydrogenation in the Rotating Packed Bed Reactor. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yu Han
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing100029, P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing100029, P. R. China
| | - Yi-Kai Gao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing100029, P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing100029, P. R. China
| | - Bao-Ju Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing100029, P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing100029, P. R. China
| | - Xin Zhang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing100029, P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing100029, P. R. China
| | - Guang-Wen Chu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing100029, P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing100029, P. R. China
| | - Yong Luo
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing100029, P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing100029, P. R. China
| | - Jian-Feng Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing100029, P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing100029, P. R. China
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11
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Wu L, Tang D, Xue J, Liu S, Wang J, Ji H, Chen C, Zhang Y, Zhao J. Competitive Non‐Radical Nucleophilic Attack Pathways for NH
3
Oxidation and H
2
O Oxidation on Hematite Photoanodes. Angew Chem Int Ed Engl 2022; 61:e202214580. [DOI: 10.1002/anie.202214580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Indexed: 11/18/2022]
Affiliation(s)
- Lei Wu
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Daojian Tang
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Jing Xue
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Siqin Liu
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Jiaming Wang
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Hongwei Ji
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Chuncheng Chen
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yuchao Zhang
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Jincai Zhao
- Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
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12
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Kao SH, Anuratha KS, Wei SY, Lin JY, Hsieh CK. Facile and Rapid Electrochemical Conversion of Ni into Ni(OH) 2 Thin Film as the Catalyst for Direct Growth of Carbon Nanotubes on Ni Foam for Supercapacitors. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3867. [PMID: 36364643 PMCID: PMC9653567 DOI: 10.3390/nano12213867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/25/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
In this paper, a facile and rapid aqueous-based electrochemical technique was used for the phase conversion of Ni into Ni(OH)2 thin film. The Ni(OH)2 thin film was directly converted and coated onto the network surface of Ni foam (NF) via the self-hydroxylation process under alkaline conditions using a simple cyclic voltammetry (CV) strategy. The as-formed and coated Ni(OH)2 thin film on the NF was used as the catalyst layer for the direct growth of carbon nanotubes (CNTs). The self-converted Ni(OH)2 thin film is a good catalytic layer for the growth of CNTs due to the fact that the OH- of the Ni(OH)2 can be reduced to H2O to promote the growth of CNTs during the CVD process, and therefore enabling the dense and uniform CNTs growth on the NF substrate. This binder-free CNTs/NF electrode displayed outstanding behavior as an electric double-layer capacitor (EDLC) due to the large surface area of the CNTs, showing excellent specific capacitance values of 737.4 mF cm-2 in the three-electrode configuration and 319.1 mF cm-2 in the two-electrode configuration, at the current density of 1 mA cm-2 in a 6 M KOH electrolyte. The CNTs/NF electrode also displayed good cycling stability, with a capacitance retention of 96.41% after 10,000 cycles, and this the excellent cycling performance can be attributed to the stable structure of the direct growth of CNTs with a strong attachment to the NF current collector, ensuring a good mechanical and electrical connection between the NF collector and the CNTs.
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Affiliation(s)
- Sheng-Hung Kao
- Department of Materials Engineering, Center for Plasma and Thin Film Technologies, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | | | - Sung-Yen Wei
- R&D Lab, SulfurScience Technology Co., Ltd., New Taipei City 24301, Taiwan
| | - Jeng-Yu Lin
- Department of Chemical and Materials Engineering, Tunghai University, Taichung City 407224, Taiwan
| | - Chien-Kuo Hsieh
- Department of Materials Engineering, Center for Plasma and Thin Film Technologies, Ming Chi University of Technology, New Taipei City 24301, Taiwan
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13
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Johnston S, Cohen S, Nguyen CK, Dinh KN, Nguyen TD, Giddey S, Munnings C, Simonov AN, MacFarlane DR. A Survey of Catalytic Materials for Ammonia Electrooxidation to Nitrite and Nitrate. CHEMSUSCHEM 2022; 15:e202200614. [PMID: 35879863 PMCID: PMC9827930 DOI: 10.1002/cssc.202200614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/24/2022] [Indexed: 06/15/2023]
Abstract
Studies of the ammonia oxidation reaction (AOR) for the synthesis of nitrite and nitrate (NO2/3 - ) have been limited to a small number of catalytic materials, majorly Pt based. As the demand for nitrate-based products such as fertilisers continues to grow, exploration of alternative catalysts is needed. Herein, 19 metals immobilised as particles on carbon fibre electrodes were tested for their catalytic activity for the ammonia electrooxidation to NO2/3 - under alkaline conditions (0.1 m KOH). Nickel-based electrodes showed the highest overall NO2/3 - yield with a rate of 5.0±1.0 nmol s-1 cm-2 , to which nitrate contributed 62±8 %. Cu was the only catalyst that enabled formation of nitrate, at a rate of 1.0±0.4 nmol s-1 cm-2 , with undetectable amounts of nitrite produced. Previously unexplored in this context, Fe and Ag also showed promise and provided new insights into the mechanisms of the process. Ag-based electrodes showed strong indications of activity towards NH3 oxidation in electrochemical measurements but produced relatively low NO2/3 - yields, suggesting the formation of alternate oxidation products. NO2/3 - production over Fe-based electrodes required the presence of dissolved O2 and was more efficient than with Ni on longer timescales. These results highlight the complexity of the AOR mechanism and provide a broad set of catalytic activity and nitrate versus nitrite yield data, which might guide future development of a practical process for the distributed sustainable production of nitrates and nitrites at low and medium scales.
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Affiliation(s)
- Sam Johnston
- School of ChemistryMonash UniversityClaytonVIC 3800Australia
| | - Sam Cohen
- School of ChemistryMonash UniversityClaytonVIC 3800Australia
- CSIRO EnergyPrivate Bag 10Clayton SouthVictoria 3169Australia
| | - Cuong K. Nguyen
- School of ChemistryMonash UniversityClaytonVIC 3800Australia
| | - Khang N. Dinh
- School of ChemistryMonash UniversityClaytonVIC 3800Australia
| | - Tam D. Nguyen
- School of ChemistryMonash UniversityClaytonVIC 3800Australia
| | - Sarbjit Giddey
- CSIRO EnergyPrivate Bag 10Clayton SouthVictoria 3169Australia
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14
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Huang Z, He L, Zhang W, Huang W, Mo Q, Yang L, Fu Q, Gao Q. Nickel sulfide-oxide heterostructured electrocatalysts: Bi-functionality for overall water splitting and in-situ reconstruction. J Colloid Interface Sci 2022; 622:728-737. [DOI: 10.1016/j.jcis.2022.04.150] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/17/2022] [Accepted: 04/26/2022] [Indexed: 12/11/2022]
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15
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Wu JC, Chuang YH, Liou SYH, Li Q, Hou CH. In situ engineering of highly conductive TiO 2/carbon heterostructure fibers for enhanced electrocatalytic degradation of water pollutants. JOURNAL OF HAZARDOUS MATERIALS 2022; 429:128328. [PMID: 35114455 DOI: 10.1016/j.jhazmat.2022.128328] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 12/27/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
Rational design of nanocomposite electrode materials with high conductivity, activity, and mechanical strength is critical in electrocatalysis. Herein, freestanding, flexible heteronanocomposites were fabricated in situ by carbonizing electrospun fibers with TiO2 nanoparticles on the surface for electrocatalytic degradation of water pollutants. The carbonization temperature was observed as a dominant parameter affecting the characteristics of the electrodes. As the carbonization temperature increased to 1000 °C, the conductivity of the electrode was significantly enhanced due to the high degree of graphitization (ID/IG ratio 1.10) and the dominant rutile phase. Additionally, the formation of TiO2 protrusions and the C-Ti heterostructure were observed at 1000 °C, which contributed to increasing the electrocatalytic activity. When 1.5 V (vs. Ag/AgCl) was employed, electrocatalytic experiments using the electrode achieved 90% degradation of crystal violet and 10.9-87.5% for an array of micropollutants. The electrical energy-per-order (EEO) for the removal of crystal violet was 0.7 kWh/m3/order, indicative of low-energy requirement. The efficient electrocatalytic activity can be ascribed to the fast electron transfer and the strong ability to generate hydroxyl radicals. Our findings expand efforts for the design of highly conductive heteronanocomposites in a facile in situ approach, providing a promising perspective for the energy-efficient electrocatalytic degradation of water pollutants.
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Affiliation(s)
- Jhen-Cih Wu
- Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Yi-Hsueh Chuang
- Institute of Environmental Engineering, National Yang Ming Chiao Tung University, 1001 University Road, East District, Hsinchu 30010, Taiwan
| | - Sofia Ya Hsuan Liou
- Department of Geosciences, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan; Research Center for Future Earth, National Taiwan University, No. 1, Section 4. Roosevelt Rd., Taipei 10617, Taiwan
| | - Qilin Li
- Department of Civil and Environmental Engineering, Rice University, 6100 Main Street MS 519, Houston, TX 77005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, 6100 Main Street MS 6398, Houston, TX 77005, USA
| | - Chia-Hung Hou
- Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan; Research Center for Future Earth, National Taiwan University, No. 1, Section 4. Roosevelt Rd., Taipei 10617, Taiwan.
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16
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Hou J, Cheng Y, Pan H, Kang P. CuSn Double‐Metal Hydroxides for Direct Electrochemical Ammonia Oxidation to Dinitrogen. ChemElectroChem 2022. [DOI: 10.1002/celc.202101301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jing Hou
- School of Chemical Engineering and Technology Tianjin University Tianjin 135 Yaguan Rd 300350 China
| | - Yingying Cheng
- School of Chemical Engineering and Technology Tianjin University Tianjin 135 Yaguan Rd 300350 China
| | - Hui Pan
- School of Chemical Engineering and Technology Tianjin University Tianjin 135 Yaguan Rd 300350 China
| | - Peng Kang
- School of Chemical Engineering and Technology Tianjin University Tianjin 135 Yaguan Rd 300350 China
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17
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Process Optimization of Electrochemical Treatment of COD and Total Nitrogen Containing Wastewater. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19020850. [PMID: 35055672 PMCID: PMC8776051 DOI: 10.3390/ijerph19020850] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/12/2021] [Accepted: 12/13/2021] [Indexed: 02/04/2023]
Abstract
In this work, an electrochemical method for chemical oxygen demand (COD) and total nitrogen (TN, including ammonia, nitrate, and nitrite) removal from wastewater using a divided electrolysis cell was developed, and its process optimization was investigated. This process could effectively relieve the common issue of NO3-/NO2- over-reduction or NH4+ over-oxidation by combining cathodic NO3-/NO2- reduction with anodic COD/NH4+ oxidation. The activity and selectivity performances toward pollutant removal of the electrode materials were investigated by electrochemical measurements and constant potential electrolysis, suggesting that Ti electrode exhibited the best NO3-/NO2- reduction and N2 production efficiencies. In-situ Fourier transform infrared spectroscopy was used to study the in-situ electrochemical information of pollutants conversion on electrode surfaces and propose their reaction pathways. The effects of main operating parameters (i.e., initial pH value, Cl- concentration, and current density) on the removal efficiencies of COD and TN were studied. Under optimal conditions, COD and TN removal efficiencies from simulated wastewater reached 92.7% and 82.0%, respectively. Additionally, reaction kinetics were investigated to describe the COD and TN removal. Results indicated that COD removal followed pseudo-first-order model; meanwhile, TN removal followed zero-order kinetics with a presence of NH4+ and then followed pseudo-first-order kinetics when NH4+ was completely removed. For actual pharmaceutical wastewater treatment, 79.1% COD and 87.0% TN were removed after 120 min electrolysis; and no NH4+ or NO2- was detected.
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18
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Jiang K, Li K, Liu YQ, Lin S, Wang Z, Wang D, Ye Y. Nickel-cobalt nitride nanoneedle supported on nickel foam as an efficient electrocatalyst for hydrogen generation from ammonia electrolysis. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139700] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Shih YJ, Lin PY, Wu ZL. Catalytic oxidation and deionization of nitrite and nitrate ions using mesoporous carbon-supported nano-flaky cobalt and nickel oxyhydroxides. J Colloid Interface Sci 2021; 611:265-277. [PMID: 34953459 DOI: 10.1016/j.jcis.2021.12.085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/07/2021] [Accepted: 12/14/2021] [Indexed: 01/14/2023]
Abstract
The composite electrode of NiCo oxide supported by porous carbon was synthesized for nitrite oxidation and nitrate electro-sorption. The crystal structure and chemical state of the Co and Ni oxyhydroxides which were precipitated on loofah-derived activated carbon (AC) using hypochlorite were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and BET surface area. The voltammetry showed that the redox couple of Co(II)/Co(III) and Ni(II)/Ni(III) as the mediator catalytically transferred the electrons of NO2-/NO3-; the Ni site had a relatively high transfer coefficient and diffusive current, while the Co site was better in the capacitive removal of the nitrite and nitrate compounds. A batch electrolysis of nitrite ions was operated under constant anodic potential mode (0 to + 1.5 V vs. Ag/AgCl) to assess the performance of the composite electrodes. The adsorption capacity of NiCo/AC (Ni = 5% and Co = 5% on AC by weight) was 23.5 mg-N g-1, which was twice that of AC substrate (7.5 mg-N g-1), based on a multilayer adsorption model. The steady-state kinetics of the consecutive reaction were derived to determine the rate steps of the electrochemical oxidation of NO2- and adsorption of NO3-.
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Affiliation(s)
- Yu-Jen Shih
- Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan; Center for Emerging Contaminants Research, National Sun Yat-sen University, Kaohsiung, Taiwan.
| | - Pei-Ying Lin
- Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Zhi-Lun Wu
- Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan
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20
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Li J, Li J, Liu T, Chen L, Li Y, Wang H, Chen X, Gong M, Liu Z, Yang X. Deciphering and Suppressing Over‐Oxidized Nitrogen in Nickel‐Catalyzed Urea Electrolysis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107886] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jianan Li
- National Engineering Laboratory for Industrial Wastewater Treatment School of Resources and Environmental Engineering State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 China
| | - Jili Li
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200438 China
| | - Tao Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200438 China
| | - Lin Chen
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200438 China
| | - Yefei Li
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200438 China
- Key Laboratory of Computational Physical Science Fudan University Shanghai 200438 China
| | - Hualin Wang
- National Engineering Laboratory for Industrial Wastewater Treatment School of Resources and Environmental Engineering State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 China
| | - Xiurong Chen
- National Engineering Laboratory for Industrial Wastewater Treatment School of Resources and Environmental Engineering State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 China
| | - Ming Gong
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200438 China
| | - Zhi‐Pan Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200438 China
- Key Laboratory of Computational Physical Science Fudan University Shanghai 200438 China
| | - Xuejing Yang
- National Engineering Laboratory for Industrial Wastewater Treatment School of Resources and Environmental Engineering State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 China
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21
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Improved NH3-N conversion efficiency to N2 activated by BDD substrate on NiCu electrocatalysis process. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119350] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Johnston S, Kemp L, Turay B, Simonov AN, Suryanto BHR, MacFarlane DR. Copper-Catalyzed Electrosynthesis of Nitrite and Nitrate from Ammonia: Tuning the Selectivity via an Interplay Between Homogeneous and Heterogeneous Catalysis. CHEMSUSCHEM 2021; 14:4793-4801. [PMID: 34459146 DOI: 10.1002/cssc.202101557] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/30/2021] [Indexed: 06/13/2023]
Abstract
Electrocatalytic oxidation of ammonia is an appealing, low-temperature process for the sustainable production of nitrites and nitrates that avoids the formation of pernicious N2 O and can be fully powered by renewable electricity. Currently, however, the number of known efficient catalysts for such a reaction is limited. The present work demonstrates that copper-based electrodes exhibit high electrocatalytic activity and selectivity for the NH3 oxidation to NO2 - and NO3 - in alkaline solutions. Systematic investigation of the effects of pH and potential on the kinetics of the reaction using voltammetric analysis andin situ Raman spectroscopy suggest that ammonia electrooxidation on copper occurrs via two primary catalytic mechanisms. In the first pathway, NH3 is converted to NO2 - via a homogeneous electrocatalytic process mediated by redox transformations of aqueous [Cu(OH)4 ]-/2- species, which dissolve from the electrode. The second pathway is the heterogeneous catalytic oxidation of NH3 on the electrode surface favoring the formation of NO3 - . By virtue of its nature, the homogeneous-mediated pathway enables higher selectivity and was less affected by electrode poisoning with the strongly adsorbed "N" intermediates that have plagued the electrocatalytic ammonia oxidation field. Thus, the selectivity of the Cu-catalyzed NH3 oxidation towards either nitrite or nitrate can be achieved through balancing the kinetics of the two mechanisms by adjusting the pH of the electrolyte medium and potential.
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Affiliation(s)
- Sam Johnston
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
- ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, VIC 3800, Australia
| | - Liam Kemp
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
| | - Bila Turay
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | - Alexandr N Simonov
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
- ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, VIC 3800, Australia
| | | | - Douglas R MacFarlane
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
- ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, VIC 3800, Australia
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23
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Choueiri RM, Tatarchuk SW, Klinkova A, Chen LD. Mechanism of ammonia oxidation to dinitrogen, nitrite, and nitrate on β‐Ni(OH)2 from first‐principles simulations. ELECTROCHEMICAL SCIENCE ADVANCES 2021. [DOI: 10.1002/elsa.202100142] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Rachelle M. Choueiri
- Electrochemical Technology Centre Department of Chemistry University of Guelph Ontario Canada
| | - Stephen W. Tatarchuk
- Department of Chemistry and Waterloo Institute for Nanotechnology University of Waterloo Ontario Canada
| | - Anna Klinkova
- Department of Chemistry and Waterloo Institute for Nanotechnology University of Waterloo Ontario Canada
| | - Leanne D. Chen
- Electrochemical Technology Centre Department of Chemistry University of Guelph Ontario Canada
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24
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Haruna A, Mwonga P, Barrett D, Rodella CB, Forbes RP, Venter A, Sentsho Z, Fletcher PJ, Marken F, Ozoemena KI. Defect-Engineered β-MnO 2-δ Precursors Control the Structure-Property Relationships in High-Voltage Spinel LiMn 1.5Ni 0.5O 4-δ. ACS OMEGA 2021; 6:25562-25573. [PMID: 34632213 PMCID: PMC8495857 DOI: 10.1021/acsomega.1c03656] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
This study examines the role of defects in structure-property relationships in spinel LiMn1.5Ni0.5O4 (LMNO) cathode materials, especially in terms of Mn3+ content, degree of disorder, and impurity phase, without the use of the traditional high-temperature annealing (≥700 °C used for making disordered LMNO). Two different phases of LMNO (i.e., highly P4332-ordered and highly Fd3̅m-disordered) have been prepared from two different β-MnO2-δ precursors obtained from an argon-rich atmosphere (β-MnO2-δ (Ar)) and a hydrogen-rich atmosphere [β-MnO2-δ (H2)]. The LMNO samples and their corresponding β-MnO2-δ precursors are thoroughly characterized using different techniques including high-resolution transmission electron microscopy, field-emission scanning electron microscopy, Raman spectroscopy, powder neutron diffraction, X-ray photoelectron spectroscopy, synchrotron X-ray diffraction, X-ray absorption near-edge spectroscopy, and electrochemistry. LMNO from β-MnO2-δ (H2) exhibits higher defects (oxygen vacancy content) than the one from the β-MnO2-δ (Ar). For the first time, defective β-MnO2-δ has been adopted as precursors for LMNO cathode materials with controlled oxygen vacancy, disordered phase, Mn3+ content, and impurity contents without the need for conventional methods of doping with metal ions, high synthetic temperature, use of organic compounds, postannealing, microwave, or modification of the temperature-cooling profiles. The results show that the oxygen vacancy changes concurrently with the degree of disorder and Mn3+ content, and the best electrochemical performance is only obtained at 850 °C for LMNO-(Ar). The findings in this work present unique opportunities that allow the use of β-MnO2-δ as viable precursors for manipulating the structure-property relationships in LMNO spinel materials for potential development of high-performance high-voltage lithium-ion batteries.
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Affiliation(s)
- Aderemi
B. Haruna
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Patrick Mwonga
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Dean Barrett
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Cristiane B. Rodella
- Brazilian
Synchrotron Light Laboratory (LNLS/Brazilian Center of Energy and
Materials) (CNPEM), Campinas 13083-970, São Paulo, Brazil
| | - Roy P. Forbes
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Andrew Venter
- Research
and Technology Development Division, Necsa
(South African Nuclear Energy Corporation) SOC Limited, Pelindaba, Pretoria 0001, South Africa
| | - Zeldah Sentsho
- Research
and Technology Development Division, Necsa
(South African Nuclear Energy Corporation) SOC Limited, Pelindaba, Pretoria 0001, South Africa
| | - Philip J. Fletcher
- Materials
and Chemical Characterization Facility (MC), University of Bath, Claverton Down, Bath BA2 7AY, U.K.
| | - Frank Marken
- Materials
and Chemical Characterization Facility (MC), University of Bath, Claverton Down, Bath BA2 7AY, U.K.
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA27AY, U.K.
| | - Kenneth I. Ozoemena
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
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25
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Li J, Li J, Liu T, Chen L, Li Y, Wang H, Chen X, Gong M, Liu ZP, Yang X. Deciphering and Suppressing Over-Oxidized Nitrogen in Nickel-Catalyzed Urea Electrolysis. Angew Chem Int Ed Engl 2021; 60:26656-26662. [PMID: 34553818 DOI: 10.1002/anie.202107886] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 09/20/2021] [Indexed: 11/11/2022]
Abstract
Urea electrolysis is a prospective technology for simultaneous H2 production and nitrogen suppression in the process of water being used for energy production. Its sustainability is currently founded on innocuous N2 products; however, we discovered that prevalent nickel-based catalysts could generally over-oxidize urea into NO2 - products with ≈80 % Faradaic efficiencies, posing potential secondary hazards to the environment. Trace amounts of over-oxidized NO3 - and N2 O were also detected. Using 15 N isotopes and urea analogues, we derived a nitrogen-fate network involving a NO2 - -formation pathway via OH- -assisted C-N cleavage and two N2 -formation pathways via intra- and intermolecular coupling. DFT calculations confirmed that C-N cleavage is energetically more favorable. Inspired by the mechanism, a polyaniline-coating strategy was developed to locally enrich urea for increasing N2 production by a factor of two. These findings provide complementary insights into the nitrogen fate in water-energy nexus systems.
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Affiliation(s)
- Jianan Li
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Jili Li
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China
| | - Tao Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China
| | - Lin Chen
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China
| | - Yefei Li
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China.,Key Laboratory of Computational Physical Science, Fudan University, Shanghai, 200438, China
| | - Hualin Wang
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiurong Chen
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Ming Gong
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China
| | - Zhi-Pan Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China.,Key Laboratory of Computational Physical Science, Fudan University, Shanghai, 200438, China
| | - Xuejing Yang
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
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26
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Liu Z, Zhang G, Lan H, Liu H, Qu J. Optimization of a Hierarchical Porous-Structured Reactor to Mitigate Mass Transport Limitations for Efficient Electrocatalytic Ammonia Oxidation through a Three-Electron-Transfer Pathway. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:12596-12606. [PMID: 34495652 DOI: 10.1021/acs.est.1c02825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Regulation of fast three-electron-transfer processes for electrocatalytic oxidation of ammonia to nitrogen by achieving efficient generation and utilization of active sites is the optimal strategy in ammonia-containing wastewater treatment. However, the limited number of accessible active sites and sluggish interfacial mass transfer are two main bottlenecks restricting conventional ammonia oxidation configurations. Herein, we develop a macroporous Ni foam electrode integrated with vertically aligned two-dimensional mesoporous Ni2P nanosheets to create sufficient exposure of active centers. A novel ammonia oxidation reactor with the developed hierarchical porous-structured electrodes was assembled to construct an intensified microfluidic process with flow-through operation to mitigate macroscopic mass transport limitations. The confined microreaction space in the hierarchical porous reactor further promotes spontaneous nanoscale diffusion/convection of the target contaminant to high-valence Ni sites and enhances the microscopic mass transfer. The combined results of electrochemical measurements and in situ Raman spectra showed that the ammonia degradation mechanism results from direct oxidation by the high-valence Ni, significantly different from the conventional indirect active-chlorine-species-mediated oxidation. The optimized reactor achieves high-efficiency three-electron-transfer ammonia conversion with an ammonia removal efficiency of ∼70% from an initial concentration of ∼1400 mg/L and byproduct production of ∼4%, significantly superior to a conversion unit comprising a featureless Ni-based electrode in the immersed configuration, which had >50% byproduct yield. 20 days of continuous operation under variable conditions achieved >90% ammonia degradation performance and an energy consumption of 25.42 kW h kg-1 N (1 order of magnitude lower than the active-chlorine-mediated process), showing the potential of the reactor in medium-concentration ammonia-containing wastewater treatment.
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Affiliation(s)
- Zichen Liu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Gong Zhang
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Huachun Lan
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Huijuan Liu
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jiuhui Qu
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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Shabik MF, Hasan MM, Alamry K, Rahman MM, Nagao Y, Hasnat MA. Electrocatalytic oxidation of ammonia in the neutral medium using Cu2O.CuO film immobilized on glassy carbon surface. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115592] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Kim S, Kang JS, Kim S, Kang S, Sung YE, Cho K, Yoon J. Electrochemical Regeneration of Free Chlorine Treated Nickel Oxide Catalysts for Oxidation of Aqueous Pollutants. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.03.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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29
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Role of transition-metal electrocatalysts for oxygen evolution with Si-based photoanodes. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63647-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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30
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Nagita K, Yuhara Y, Fujii K, Katayama Y, Nakayama M. Ni- and Cu-co-Intercalated Layered Manganese Oxide for Highly Efficient Electro-Oxidation of Ammonia Selective to Nitrogen. ACS APPLIED MATERIALS & INTERFACES 2021; 13:28098-28107. [PMID: 34043316 DOI: 10.1021/acsami.1c04422] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We fabricated a thin film of layered MnO2 whose interlayer space was occupied by hydrated Ni2+ and Cu2+ ions. The process consisted of electrodeposition of layered MnO2 intercalated with tetrabutylammonium cations (TBA+) by anodic oxidation of aqueous Mn2+ ions in the presence of TBA+, followed by ion exchange of the initially incorporated bulkier TBA+ with the denser transition metals in solution. The resulting layered MnO2 co-intercalated with Ni2+ and Cu2+ ions (NiCu/MnO2) catalyzed the ammonia oxidation reaction (AOR) in an alkaline electrolyte with a much lower overpotential than its Ni2+- and Cu2+-intercalated single-cation counterparts. Surprisingly, the NiCu/MnO2 electrode achieved a faradic efficiency as high as nearly 100% (97.4%) for nitrogen evolution at a constant potential of +0.6 V vs Hg/HgO. This can be ascribed to the occurrence of the AOR in the potential region where water is stable and dimerization of the partially dehydrogenated ammonia species is preferred, thereby forming an N-N bond, rather than to be further oxidized into NOx species.
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Affiliation(s)
- Kenji Nagita
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan
| | - Yoshiki Yuhara
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan
| | - Kenta Fujii
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan
| | - Yu Katayama
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan
| | - Masaharu Nakayama
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan
- Blue Energy Center for SGE Technology (BEST), Ube 755-8611, Japan
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31
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Stability Study of Materials for Electrode Supports for the Hydrogen Generation from a NaCl Aqueous Solution. Electrocatalysis (N Y) 2021. [DOI: 10.1007/s12678-021-00672-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Xia C, Li Y, Kim H, Kim K, Choe WS, Kim JK, Park JH. A highly activated iron phosphate over-layer for enhancing photoelectrochemical ammonia decomposition. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124900. [PMID: 33383456 DOI: 10.1016/j.jhazmat.2020.124900] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/13/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Environmentally friendly ammonia (NH3) decomposition has attracted a lot of interests in recent years to resolve the issue of water eutrophication from a wastewater and achieve a clean H2 storage. Here, we report a novel strategy for solar-driven ammonia decomposition by introducing a highly-activated iron phosphate (FePi) over-layer on the surface of α-Fe2O3 nanorods photoanode (FePi/Fe2O3), and innovatively propose a photoelectrochemical (PEC) ammonia degradation system with enhanced performance. After a facile electrochemical (EC) activation, the FePi over-layer is converted into FeOOH. The EC-activated over-layer provides the efficient active sites for the ammonia adsorption process, which promotes the high catalytic kinetics for ammonia oxidation reaction (AOR). Due to the synergistic effect of the electrocatalytic and the photocatalytic process, the FePi/Fe2O3 exhibits the enhanced PEC AOR performance, which competes with water oxidation reaction (WOR). Comparing to the initial concentration of ammonia, the FePi/Fe2O3 achieves a 54.4% ammonia degradation rate within 3 h at 1.23 V vs. reversible hydrogen electrode (RHE) under 1 sun illumination, which demonstrates the reliable ammonia decomposition performance. This study confirms that it is feasible to achieve PEC ammonia decomposition in an aqueous solution without chloride mediators and provides a promising strategy for the harmless treatment of ammonia wastewater.
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Affiliation(s)
- Chengkai Xia
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
| | - Yuankai Li
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
| | - Heeho Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
| | - Kyeongseo Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
| | - Woo-Seok Choe
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
| | - Jung Kyu Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea.
| | - Jong Hyeok Park
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea.
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33
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Gross SJ, McDevitt KM, Mumm DR, Mohraz A. Mitigating Bubble Traffic in Gas-Evolving Electrodes via Spinodally Derived Architectures. ACS APPLIED MATERIALS & INTERFACES 2021; 13:8528-8537. [PMID: 33555849 DOI: 10.1021/acsami.0c20798] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Porous electrodes are widely used in the industry because of their high surface area to volume ratio. However, the stochastic morphology of most commercially available porous electrodes results in poor electrical connections in the solid phase and inefficient mass transport through the pore phase. This can be especially detrimental for gas-evolving processes such as water electrolysis for hydrogen and oxygen generation. Bicontinuous interfacially jammed emulsion gels (bijels) offer templates from which to create porous electrodes with robust solid-state interconnectivity and a uniform pore structure that facilitate improved electron and mass transport. In this study, gas release rates and electrochemical experiments are utilized to study the effects of powder- and bijel-derived microstructures on hydrogen generation by water electrolysis. The bijel-derived electrodes are shown to expel product gas faster and require up to 25% less overpotential to drive water electrolysis over the range of current densities tested (-5 to -40 mA/cm2) than their powder-derived analogs. Our findings suggest that the uniform and bicontinuous domains of bijel-derived porous electrodes can mitigate the limited current distribution and deleterious bubble effect found in stochastic electrodes, in turn improving the overall performance of electrolytic processes requiring transport of gaseous species.
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Affiliation(s)
- Sierra J Gross
- Department of Materials Science and Engineering, Samueli School of Engineering, University of California, Irvine, 544 Engineering Tower, Irvine, California 92697-2585, United States
| | - Kyle M McDevitt
- Department of Materials Science and Engineering, Samueli School of Engineering, University of California, Irvine, 544 Engineering Tower, Irvine, California 92697-2585, United States
| | - Daniel R Mumm
- Department of Materials Science and Engineering, Samueli School of Engineering, University of California, Irvine, 544 Engineering Tower, Irvine, California 92697-2585, United States
| | - Ali Mohraz
- Department of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, 916 Engineering Tower, Irvine, California 92697-2580, United States
- Department of Materials Science and Engineering, Samueli School of Engineering, University of California, Irvine, 544 Engineering Tower, Irvine, California 92697-2585, United States
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34
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Chen W, Xu L, Zhu X, Huang Y, Zhou W, Wang D, Zhou Y, Du S, Li Q, Xie C, Tao L, Dong C, Liu J, Wang Y, Chen R, Su H, Chen C, Zou Y, Li Y, Liu Q, Wang S. Unveiling the Electrooxidation of Urea: Intramolecular Coupling of the N−N Bond. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015773] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Wei Chen
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Leitao Xu
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Xiaorong Zhu
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials Science Nanjing Normal University Nanjing Jiangsu 210023 P. R. China
| | - Yu‐Cheng Huang
- Research Center for X-ray Science & Department of Physics Tamkang University 151 Yingzhuan Rd. New Taipei City 25137 Taiwan
| | - Wang Zhou
- College of Materials Science and Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Dongdong Wang
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Yangyang Zhou
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Shiqian Du
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Qiling Li
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Chao Xie
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Li Tao
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Chung‐Li Dong
- Research Center for X-ray Science & Department of Physics Tamkang University 151 Yingzhuan Rd. New Taipei City 25137 Taiwan
| | - Jilei Liu
- College of Materials Science and Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Yanyong Wang
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Ru Chen
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Hui Su
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 P. R. China
| | - Chen Chen
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Yuqin Zou
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Yafei Li
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials Science Nanjing Normal University Nanjing Jiangsu 210023 P. R. China
| | - Qinghua Liu
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 P. R. China
| | - Shuangyin Wang
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
- The National Supercomputing Center in Changsha Hunan University Changsha Hunan 410082 P. R. China
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35
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Chen W, Xu L, Zhu X, Huang Y, Zhou W, Wang D, Zhou Y, Du S, Li Q, Xie C, Tao L, Dong C, Liu J, Wang Y, Chen R, Su H, Chen C, Zou Y, Li Y, Liu Q, Wang S. Unveiling the Electrooxidation of Urea: Intramolecular Coupling of the N−N Bond. Angew Chem Int Ed Engl 2021; 60:7297-7307. [DOI: 10.1002/anie.202015773] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Indexed: 01/23/2023]
Affiliation(s)
- Wei Chen
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Leitao Xu
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Xiaorong Zhu
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials Science Nanjing Normal University Nanjing Jiangsu 210023 P. R. China
| | - Yu‐Cheng Huang
- Research Center for X-ray Science & Department of Physics Tamkang University 151 Yingzhuan Rd. New Taipei City 25137 Taiwan
| | - Wang Zhou
- College of Materials Science and Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Dongdong Wang
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Yangyang Zhou
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Shiqian Du
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Qiling Li
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Chao Xie
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Li Tao
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Chung‐Li Dong
- Research Center for X-ray Science & Department of Physics Tamkang University 151 Yingzhuan Rd. New Taipei City 25137 Taiwan
| | - Jilei Liu
- College of Materials Science and Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Yanyong Wang
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Ru Chen
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Hui Su
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 P. R. China
| | - Chen Chen
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Yuqin Zou
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
| | - Yafei Li
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials Science Nanjing Normal University Nanjing Jiangsu 210023 P. R. China
| | - Qinghua Liu
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 P. R. China
| | - Shuangyin Wang
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha Hunan 410082 P. R. China
- The National Supercomputing Center in Changsha Hunan University Changsha Hunan 410082 P. R. China
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36
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Aladeemy SA, Al-Mayouf AM, Amer MS, Alotaibi NH, Weller MT, Ghanem MA. Structure and electrochemical activity of nickel aluminium fluoride nanosheets during urea electro-oxidation in an alkaline solution. RSC Adv 2021; 11:3190-3201. [PMID: 35424230 PMCID: PMC8694015 DOI: 10.1039/d0ra10814f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 01/05/2021] [Indexed: 11/21/2022] Open
Abstract
An electrocatalyst of potassium nickel aluminium hexafluoride (KNiAlF6) nanosheets has been prepared using solid-phase synthesis at 900 °C. X-ray diffraction, scanning electron microscopy, and conductivity studies confirmed the formation of KNiAlF6 nanosheets having a cubic defect pyrochlore structure with an average thickness of 60–70 nm and conductivity of 1.297 × 103 S m−1. The electrochemical catalytic activity of the KNiAlF6 nanosheets was investigated for urea oxidation in alkaline solution. The results show that the KNiAlF6 nanosheets exhibit a mass activity of ∼395 mA cm−2 mg−1 at 1.65 V vs. HRE, a reaction activation energy of 4.02 kJ mol−1, Tafel slope of 22 mV dec−1 and an oxidation onset potential of ∼1.35 V vs. HRE which is a significant enhancement for urea oxidation when compared with both bulk Ni(OH)2 and nickel hydroxide-based catalysts published in the literature. Chronoamperometry and impedance analysis of the KNiAlF6 nanosheets reveal lower charge transfer resistance and long-term stability during the prolonged urea electro-oxidation process, particularly at 60 °C. After an extended urea electrolysis process, the structure and morphology of the KNiAlF6 nanosheets were significantly changed due to partial transformation to Ni(OH)2 but the electrochemical activity was sustained. The enhanced electrochemical surface area and the replacement of nickel in the lattice by aluminium make KNiAlF6 nanosheets highly active electrocatalysts for urea oxidation in alkaline solution. An electrocatalyst of potassium nickel aluminium hexafluoride (KNiAlF6) nanosheets for enhanced urea oxidation reaction.![]()
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Affiliation(s)
- Saba A Aladeemy
- Electrochemical Sciences Research Chair (ESRC), Chemistry Department, King Saud University 11451 Riyadh Saudi Arabia +96614675992 +966 114670405.,K. A. CAR Energy Research and Innovation Center at Riyadh Saudi Arabia
| | - Abdullah M Al-Mayouf
- Electrochemical Sciences Research Chair (ESRC), Chemistry Department, King Saud University 11451 Riyadh Saudi Arabia +96614675992 +966 114670405.,K. A. CAR Energy Research and Innovation Center at Riyadh Saudi Arabia
| | - Mabrook S Amer
- Electrochemical Sciences Research Chair (ESRC), Chemistry Department, King Saud University 11451 Riyadh Saudi Arabia +96614675992 +966 114670405
| | - Nouf H Alotaibi
- Electrochemical Sciences Research Chair (ESRC), Chemistry Department, King Saud University 11451 Riyadh Saudi Arabia +96614675992 +966 114670405
| | - Mark T Weller
- Chemistry Department, Cardiff University Cardiff CF10 3AT UK
| | - Mohamed A Ghanem
- Electrochemical Sciences Research Chair (ESRC), Chemistry Department, King Saud University 11451 Riyadh Saudi Arabia +96614675992 +966 114670405
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37
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Gonzalez-Reyna M, Rodriguez-Lopez A, Pérez-Robles JF. One-step synthesis of carbon nanospheres with an encapsulated iron-nickel nanoalloy and its potential use as an electrocatalyst. NANOTECHNOLOGY 2020; 32:095706. [PMID: 33295297 DOI: 10.1088/1361-6528/abb9d9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
For many years, in electrochemical processes, carbon nanostructures with metal support have been employed as electrodes due to their high surface area, chemical stability, and excellent performance as catalyst support by allowing a better electronic transfer. Nevertheless, on the surface, metallic nanoparticles are susceptible to corrosion. Instead, by encapsulating individual nanoparticles, they are protected. Among the carbon nanostructures, the most common are graphene, carbon nanotubes (CNTs), and carbon nanospheres (CNSs). Unlike CNTs and CNSs, graphene is difficult to obtain in mass production, limiting their applications. Regarding CNTs and CNSs, the latter presents better catalytic activity. Nonetheless, the process of synthesis of CNSs with metal inside is commonly made by time-consuming autoclave processes, some involving more than 43 h, and hence are expensive. Here, we suggest an advantageous synthesis of CNSs with an iron-nickel alloy encapsulated inside, by using a one-step chemical vapor deposition (CVD) process in less than 3 h. This material has potential applications for environmental and energy processes. According to the authors, the uses of iron-nickel alloys as an electrocatalyst for the ammonia oxidation reaction has not been proved. Thus, we evaluate the composite as an electrocatalyst for the ammonia oxidation reaction, an electrochemical process that offers environmental remediation and hydrogen as a fuel. The electrochemical characterization shows that the use of a bimetallic electrode improves the catalytic activity. In this case, nickel is the active specie and iron is the metal added which reduces the reaction potential. Besides, the composite presents high specific capacitance, better than other materials proposed such as graphene decorated with FeNi alloys. This behavior can be related to the variation of the catalyst morphology (supported vs. encapsulated) by improving the catalyst dispersion and particle size stabilization.
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Affiliation(s)
- Marlen Gonzalez-Reyna
- Departamento de materiales, CINVESTAV-Queretaro, C.P., 76230, Querétaro, Querétaro, México
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38
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Tsai MH, Chen TC, Juang Y, Hua LC, Huang C. High catalytic performance of CuCo/nickel foam electrode for ammonia electrooxidation. Electrochem commun 2020. [DOI: 10.1016/j.elecom.2020.106875] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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39
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Chen W, Xie C, Wang Y, Zou Y, Dong CL, Huang YC, Xiao Z, Wei Z, Du S, Chen C, Zhou B, Ma J, Wang S. Activity Origins and Design Principles of Nickel-Based Catalysts for Nucleophile Electrooxidation. Chem 2020. [DOI: 10.1016/j.chempr.2020.07.022] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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40
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Shih YJ, Huang SH, Chen CL, Dong CD, Huang CP. Electrolytic characteristics of ammonia oxidation in real aquaculture water using nano-textured mono-and bimetal oxide catalysts supported on graphite electrodes. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136990] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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41
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Song J, Yin Y, Li Y, Gao Y, Liu Y. In-situ membrane fouling control by electrooxidation and microbial community in membrane electro-bioreactor treating aquaculture seawater. BIORESOURCE TECHNOLOGY 2020; 314:123701. [PMID: 32629382 DOI: 10.1016/j.biortech.2020.123701] [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: 05/05/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
Ammonia and nitrite in aquaculture recirculating seawater need to be strictly controlled to avoid deleterious effects on aquatic organisms. However, traditional biological approach can hardly meet the standard due to the short hydraulic retention time (HRT) and nitrite accumulation. A Membrane Electro-Bioreactor (MEBR) was developed for ammonia removal enhancement and in-situ electrochemical membrane fouling mitigation. The fouling mechanism was first found to proceed via the standard filtration model. The flux decrease was mainly caused by an internal pore clogging phenomenon. Membrane fouling resistance was enhanced by increasing anode potential from 0 to 1.4 V vs. SCE (Saturated Calomel Electrode). The ammonia removal rate in the MEBR was above 95% (HRT: 2 h, after day-13) and membrane fouling was mitigated that operation duration was extended by 71.4%. Higher total proportion of Proteobacteria, Bacteroidetes, Planctomycetes and Actinobacteria was obtained in the MEBR, suggesting higher nitrification and nitrogen removal potentials.
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Affiliation(s)
- Jing Song
- Dalian Ocean University, Dalian 116023, China; Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China
| | - Yanming Yin
- Dalian Ocean University, Dalian 116023, China; Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China; National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Yihan Li
- Dalian Ocean University, Dalian 116023, China; Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China
| | - Yifei Gao
- Dalian Ocean University, Dalian 116023, China; Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China
| | - Ying Liu
- Dalian Ocean University, Dalian 116023, China; Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China.
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Wang TJ, Xu GR, Sun HY, Huang H, Li FM, Chen P, Chen Y. Anodic hydrazine electrooxidation boosted overall water electrolysis by bifunctional porous nickel phosphide nanotubes on nickel foam. NANOSCALE 2020; 12:11526-11535. [PMID: 32432270 DOI: 10.1039/d0nr02196b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Water electrolysis is an environmentally friendly and sustainable technique for ultra-pure hydrogen production, while expensive electrode materials and high driving voltage have seriously hindered its commercialization process. Here, Earth-abundant bifunctional porous Ni2P hollow nanotubes on nickel foam (Ni2P-HNTs/NF) electrocatalysts are synthesized through a facile self-template method and a phosphating process, which are perfectly combined with the hydrazine electrooxidation reaction (HzOR) boosted water electrolysis. Benefiting from the unique structural characteristic of open-framework and abundant step atoms, Ni2P-HNTs/NF achieves 10 mA cm-2 at 91 mV (vs. RHE) for the cathodic hydrogen evolution reaction and 18 mV (vs. RHE) for the anodic HzOR in a three electrode system, respectively. The corresponding two-electrode hydrazine electrolyzer produces 10 mA cm-2 with a total voltage of only 152 mV for ultra-pure hydrogen production, highlighting a cost-effective and energy-saving water electrolysis mode.
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Affiliation(s)
- Tian-Jiao Wang
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
| | - Guang-Rui Xu
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
| | - Hui-Ying Sun
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
| | - Hao Huang
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
| | - Fu-Min Li
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
| | - Pei Chen
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
| | - Yu Chen
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
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Identification of the role of Cu site in Ni-Cu hydroxide for robust and high selective electrochemical ammonia oxidation to nitrite. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136157] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Gonzalez-Reyna M, Luna-Martínez MS, Perez-Robles JF. Nickel supported on carbon nanotubes and carbon nanospheres for ammonia oxidation reaction. NANOTECHNOLOGY 2020; 31:235706. [PMID: 32031991 DOI: 10.1088/1361-6528/ab73b6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Here it is proposed the use of nickel supported on carbon nanotubes and carbon nanospheres as a cheaper catalyst alternative to the platinum electrodes for the oxidation process of ammonia. Using scanning electron microscopy and Raman spectroscopy confirmed the presence of the Ni on the surface of the carbon nanostructures and based on the electrochemical results is established that the redox process between Ni+2 and Ni+3 plays the role of intermediate in the ammonia oxidation reaction. This process causes an increment in the anodic current density that is dependent on the pH and ammonia concentration. Even more, using the rotating disk electrode technique, the ammonia oxidation, is defined as a diffusion-controlled process that follows first-order kinetics in respect of the concentration of ammonia and suggests the formation of nitrogen as the principal reaction product, where the carbon nanospheres present the best results.
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Shih YJ, Dong CD, Huang YH, Huang CP. Loofah-derived activated carbon supported on nickel foam (AC/Ni) electrodes for the electro-sorption of ammonium ion from aqueous solutions. CHEMOSPHERE 2020; 242:125259. [PMID: 31896176 DOI: 10.1016/j.chemosphere.2019.125259] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/17/2019] [Accepted: 10/28/2019] [Indexed: 06/10/2023]
Abstract
Activated carbon (AC), prepared from dried loofah sponge, was supported on nickel foam to fabricate AC/Ni electrodes. The characteristics of ammonium electrosorption on AC/Ni electrodes was studied. Results showed that AC prepared in one-step activation (without pre-pyrolysis), i.e., OAC, had relatively low crystallinity, high mesoporosity, and high specific capacitance compared to those made in two-step carbonation followed by activation. Adsorption and desorption density of NH4+ were measured at constant potential of -1.0 V (vs. Hg/HgO) and +0.1 V (vs. Hg/HgO), respectively. Non-faradaic charging contributed to the electrochemical storage and adsorption of ammonium ions on the AC surface with a maximal charge efficiency of 80%, at an applied potential of -1.0 V (vs. Hg/HgO). Multiple-layer adsorption isotherm better described the electrosorption of ammonium ion on OAC/Ni electrodes yielding a maximum adsorption capacity of 6 mg-N g-1, which was comparable with other similar systems. Overall, results clearly demonstrated the effect of synthesis strategy on the capacitive charging behaviors of AC/Ni electrodes and its relationship to NH4+ electrosorption.
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Affiliation(s)
- Yu-Jen Shih
- Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung, 804, Taiwan.
| | - Cheng-Di Dong
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 811, Taiwan
| | - Yao-Hui Huang
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, 701, Taiwan
| | - C P Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, 19716, USA.
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Yao J, Mei Y, Xia G, Lu Y, Xu D, Sun N, Wang J, Chen J. Process Optimization of Electrochemical Oxidation of Ammonia to Nitrogen for Actual Dyeing Wastewater Treatment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E2931. [PMID: 31443230 PMCID: PMC6720899 DOI: 10.3390/ijerph16162931] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 08/03/2019] [Accepted: 08/13/2019] [Indexed: 01/16/2023]
Abstract
To mitigate the potential environmental risks caused by nitrogen compounds from industrial wastewater, residual ammonia after conventional wastewater treatment should be further eliminated. In this work, an electrochemical oxidation process for converting ammonia to nitrogen in actual dyeing wastewater was investigated. The effects of the main operating parameters, including initial pH value, applied current density, NaCl concentration, and flow, were investigated on ammonia removal and products distribution. Experimental results indicated that, under optimal conditions of an initial pH value of 8.3, applied current density of 20 mA cm-2, NaCl concentration of 1.0 g L-1, and flow of 300 mL min-1, the ammonia could be completely removed with N2 selectivity of 88.3% in 60 min electrolysis. A kinetics investigation using a pseudo-first-order model provided a precise description of ammonia removal during the electro-oxidation process. Experimental functions for describing the relationships between kinetic constants of ammonia removal and main operating parameters were also discussed. Additionally, the mechanisms and economic evaluation of ammonia oxidation were conducted. All these results clearly proved that this electro-oxidation process could efficiently remove ammonia and achieve high N2 selectivity.
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Affiliation(s)
- Jiachao Yao
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yu Mei
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Guanghua Xia
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yin Lu
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Dongmei Xu
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Nabo Sun
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Jiade Wang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jun Chen
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China.
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Huang CL, Chuah XF, Hsieh CT, Lu SY. NiFe Alloy Nanotube Arrays as Highly Efficient Bifunctional Electrocatalysts for Overall Water Splitting at High Current Densities. ACS APPLIED MATERIALS & INTERFACES 2019; 11:24096-24106. [PMID: 31185711 DOI: 10.1021/acsami.9b05919] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A bubble-releasing assisted pulse electrodeposition method was developed to create metallic alloy, NiFe, nanotube arrays in one step. The NiFe alloy nanotube array exhibited excellent bifunctional electrolytic activities, achieving low overpotentials of 100 mV for the hydrogen evolution reaction and 236 mV for the oxygen evolution reaction at 10 mA cm-2, both in 1 M KOH at room temperature. For overall water splitting, the NiFe alloy nanotube array delivered 10 mA cm-2 at an ultralow cell voltage of 1.58 V, among the top tier of the state-of-the-art bifunctional electrocatalysts. The NiFe alloy nanotube array also exhibited ultrastability at high current densities, experiencing only a minor chronoamperometric decay of 6.5% after a 24 h operation at 400 mA cm-2. The success of the present binder-free nanotube array-based electrode can be attributed to the much enlarged reaction surface area, one-dimensionally guided charge transport and mass transfer offered by the nanotube structure, and improved product crystallinity provided by the pulse current electrodeposition. The nanotube array structure proves to be a promising new architecture design for electrocatalysts.
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Affiliation(s)
- Chun-Lung Huang
- Department of Chemical Engineering , National Tsing Hua University , Hsinchu 30013 , Taiwan
| | - Xui-Fang Chuah
- Department of Chemical Engineering , National Tsing Hua University , Hsinchu 30013 , Taiwan
| | - Cheng-Ting Hsieh
- Department of Chemical Engineering , National Tsing Hua University , Hsinchu 30013 , Taiwan
| | - Shih-Yuan Lu
- Department of Chemical Engineering , National Tsing Hua University , Hsinchu 30013 , Taiwan
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Zhai L, Mak CH, Qian J, Lin S, Lau SP. Self-reconstruction mechanism in NiSe2 nanoparticles/carbon fiber paper bifunctional electrocatalysts for water splitting. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.031] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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49
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Temperature effect on crystallinity and chemical states of nickel hydroxide as alternative superior catalyst for urea electrooxidation. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.01.150] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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50
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Agoston R, Abu Sayeed M, Jones MWM, de Jonge MD, O'Mullane AP. Monitoring compositional changes in Ni(OH)2 electrocatalysts employed in the oxygen evolution reaction. Analyst 2019; 144:7318-7325. [DOI: 10.1039/c9an01905g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Relating morphology and compositional changes spatially across a catalyst is important for understanding the active site involved in a reaction which is studied here for the OER at Ni(OH)2.
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Affiliation(s)
- Roland Agoston
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Australia
| | - Md Abu Sayeed
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Australia
| | - Michael W. M. Jones
- Central Analytical Research Facility
- Institute for Future Environments
- Queensland University of Technology (QUT)
- Australia
| | | | - Anthony P. O'Mullane
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Australia
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