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Yang S, Mao D, Yu Z, Ma W, Ma L, Li X, Xi F. Comparison of life cycle assessment between hydrogen production from silicon waste and alkaline water electrolysis. Sci Total Environ 2024; 920:171065. [PMID: 38373455 DOI: 10.1016/j.scitotenv.2024.171065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/26/2023] [Accepted: 02/16/2024] [Indexed: 02/21/2024]
Abstract
With global warming becoming increasingly severe, environmental issues are receiving international attention. Crystalline silicon is an indispensable and important raw material for photovoltaic and semiconductor fields, but the cutting of crystalline silicon materials generates a large amount of silicon wastes. This article evaluates the environmental impact of a hydrogen production process using diamond-wire sawing silicon waste (DSSW) using the life cycle assessment (LCA) methodology. For comparison, it was also analyzed the environmental impact of the alkaline water electrolysis (AEL) hydrogen production route. In the DSSW alkaline catalyzed hydrolysis (DACH) hydrogen production route, the hydrogen production stage accounts for the main contribution of nine environmental impact indexes, including GWP, PED, ADP, AP, EP, ODP, ET, HT-cancer, and HT-non cancer, exceeding 56 %. Whereas for the AEL route, the environmental impacts of the electrolytic cell manufacturing stage can be neglected, and the operating stage contributes almost all the environmental impacts, contributing more than 92 % to the twelve environmental impact indexes. Compared to the AEL route, the DACH route has higher environmental impacts, with GWP index reaching 87.78 kg CO2 -eq/kg H2, PED index reaching 1772.90 MJ/kg H2, and IWU index reaching 622.37 kg/kg H2 which are 2.85, 4.07 and 7.56 times higher than the former, respectively. Although the environmental impact of the DACH route is significant, most of its indirect impacts were caused by the use of raw materials, and the energy consumption and direct environmental impact are both low. The environmental impact of the AEL route is mainly indirect effects generated due to the use of electricity. If clean renewable energy sources (e.g., solar PV, hydropower, geothermal or biofuels), were used for the AEL route, all twelve environmental impact indexes would be significantly reduced.
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Affiliation(s)
- Shengqiang Yang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; National Engineering Research Center for Vacuum Metallurgy, Kunming 650093, PR China
| | - Dan Mao
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China
| | - Zhiqiang Yu
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; National Engineering Research Center for Vacuum Metallurgy, Kunming 650093, PR China.
| | - Wenhui Ma
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; National Engineering Research Center for Vacuum Metallurgy, Kunming 650093, PR China; School of Science and Technology, Pu'er University, Pu'er 665000, PR China.
| | - Lin Ma
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China
| | - Xiufeng Li
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China
| | - Fengshuo Xi
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; National Engineering Research Center for Vacuum Metallurgy, Kunming 650093, PR China
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Zhou P, Chen S, Bai H, Liu C, Feng J, Liu D, Qiao L, Wang S, Pan H. Facile formation of Zn-incorporated NiFe layered double hydroxide as highly-efficient oxygen evolution catalyst. J Colloid Interface Sci 2023; 647:65-72. [PMID: 37244177 DOI: 10.1016/j.jcis.2023.05.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/15/2023] [Accepted: 05/17/2023] [Indexed: 05/29/2023]
Abstract
Electrochemical water splitting is the primary method to produce green hydrogen, which is considered an efficient alternative to fossil fuels for achieving carbon neutrality. For meeting the increasing market demand for green hydrogen, high-efficiency, low-cost, and large-scale electrocatalysts are crucial. In this study, we report a simple spontaneous corrosion and cyclic voltammetry (CV) activation method to fabricate Zn-incorporated NiFe layered double hydroxide (LDH) on commercial NiFe foam, which shows excellent oxygen evolution reaction (OER) performance. The electrocatalyst achieves an overpotential of 565 mV and outstanding stability of up to 112 h at 400 mA cm-2. The active layer for OER is shown to be β-NiFeOOH according to the results of in-situ Raman. Our findings suggest that the NiFe foam treated by simple spontaneous corrosion has promising industrial applications as a highly efficient OER catalyst.
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Affiliation(s)
- Pengfei Zhou
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR
| | - Songbo Chen
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR
| | - Haoyun Bai
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR
| | - Chunfa Liu
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR
| | - Jinxian Feng
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR
| | - Di Liu
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR
| | - Lulu Qiao
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR
| | - Shuangpeng Wang
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR.
| | - Hui Pan
- Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao SAR; Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, 999078, Macao SAR.
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Ma J, Yang M, Zhao G, Li Y, Liu B, Dang J, Gu J, Hu S, Yang F, Ouyang M. Ni electrodes with 3D-ordered surface structures for boosting bubble releasing toward high current density alkaline water splitting. Ultrason Sonochem 2023; 96:106398. [PMID: 37156161 DOI: 10.1016/j.ultsonch.2023.106398] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/26/2022] [Accepted: 04/03/2023] [Indexed: 05/10/2023]
Abstract
The performance of alkaline water electrolysis (AWE) at high current densities is limited by gas bubble generation on the surface of electrodes, which covers active sites and blocks mass transfer, resulting in lower AWE efficiency. Here, we utilize electro-etching to construct Ni electrodes with hydrophilic and aerophobic surfaces to improve the efficiency of AWE. Ni atoms on the Ni surface can be exfoliated orderly along the crystal planes by electro-etching, forming micro-nano-scale rough surfaces with multiple crystal planes exposed. The 3D-ordered surface structures increase the exposure of active sites and promote the removal of bubbles on the surface of the electrode during the AWE process. In addition, experimental results from high-speed camera reveal that rapidly released bubbles can improve the local circulation of electrolyte. Lastly, the accelerated durability test based on practical working condition demonstrates that the 3D-ordered surface structures are robust and durable during the AWE process.
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Affiliation(s)
- Jugang Ma
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
| | - Mingye Yang
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
| | - Guanlei Zhao
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
| | - Yangyang Li
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
| | - Biao Liu
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
| | - Jian Dang
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
| | - Junjie Gu
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
| | - Song Hu
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China; School of Mechanical Engineering, University of Science & Technology Beijing, Beijing 100083, China
| | - Fuyuan Yang
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
| | - Minggao Ouyang
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
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Cho KM, Deshmukh PR, Shin WG. Hydrodynamic behavior of bubbles at gas-evolving electrode in ultrasonic field during water electrolysis. Ultrason Sonochem 2021; 80:105796. [PMID: 34678597 PMCID: PMC8529173 DOI: 10.1016/j.ultsonch.2021.105796] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/06/2021] [Accepted: 10/14/2021] [Indexed: 06/01/2023]
Abstract
In electrochemical processes, gas bubbles on the electrode can cause an increase in both overpotential and ohmic voltage drop which leads to higher energy consumption. Applying power ultrasound during water electrolysis can help to reduce the overpotential, enhance mass transfer, and save energy. In this study, we investigated the effect of ultrasound (20 kHz) on the hydrogen evolution reaction (HER) on a stainless steel plate with varying concentrations of NaOH solutions at 298 K, using linear sweep voltammetry (LSV). We especially focused on understanding the bubble behavior on the stainless steel plate during HER using high-speed imaging in ultrasonic field. When ultrasound was applied to solutions with NaOH concentrations of 0.1, 0.5, 1 M, the current density increased by about 9.0, 5.9, 2.8 %, respectively. As the ultrasound irradiation began, the bubbles tended to hover around on the electrode surface, coalescing with other bubbles, rather than rising. When the size of the coalesced bubbles became too large to stay on the surface of the electrode, they were expelled from the ultrasonic field. The repeated collapse and coalescence of these bubbles was observed while they were rising. The velocity increased about 2 times when ultrasound irradiation began, and increased by more than 6 times in the ultrasonic field. More nucleation of bubbles was observed on the electrode in the ultrasonic field. Using ultrasound reduced the critical diameter of bubbles which detached from the electrode, from 58.0 to 15.9 μm, and the residence time of the bubbles, from 533 to 118 ms. Further, when the ultrasound was applied, the mean diameter of bubbles decreased from 71.8 to 17 μm. Hence, bubble coverage on the electrode surface decreased from 8.3 to 1 % despite an increase in the total number of bubbles. As a result, ultrasound was found to be effective for hydrogen production during water electrolysis, increasing current by the faster removal of gas from the stainless steel plate.
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Affiliation(s)
- Kyung Min Cho
- Department of Mechanical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - P R Deshmukh
- Department of Mechanical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Weon Gyu Shin
- Department of Mechanical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea.
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Tan W, He H, Gao Y, Peng Y, Dai X. Nucleation and growth mechanisms of an electrodeposited Ni-Se-Cu coating on nickel foam. J Colloid Interface Sci 2021; 600:492-502. [PMID: 34023707 DOI: 10.1016/j.jcis.2021.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 04/19/2021] [Accepted: 05/01/2021] [Indexed: 11/15/2022]
Abstract
Electrocatalysts for water splitting have been widely explored among recent years. In this study, nickel-selenium-copper (Ni-Se-Cu) coating was synthesized on nickel foam through potentiostatic electrodeposition. The electrochemical kinetics and nucleation mechanisms of the deposition were investigated, and the diffusion coefficient D from different deposition potentials and temperatures was calculated. Results reveal that the electrodeposition of Ni-Se-Cu follows an instantaneous nucleation and diffusion-controlled three-dimensional (3D) growth mechanism. Deposition potential and bath temperature slightly effect the nucleation mechanism of electrodeposition. The apparent activation energy Ea of the hydrogen evolution reaction (HER) in 1.0 M KOH electrolyte of Ni-Se-Cu is 21.1 kJ·mol-1, which is lower than that of Ni-Se (37.7 kJ·mol-1). The majority phase formed by nickel and selenium is Ni3Se2, and a Ni(Cu) solid solution forms after the incorporation of Cu atoms into a Ni lattice.
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Affiliation(s)
- Wenyu Tan
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
| | - Hanwei He
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China.
| | - Ying Gao
- Beijing Sinoma Synthetic Crystals Co., Ltd, Beijing 100018, China
| | - Yizhi Peng
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
| | - Xiaomei Dai
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
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Colli AN, Girault HH, Battistel A. Non-Precious Electrodes for Practical Alkaline Water Electrolysis. Materials (Basel) 2019; 12:ma12081336. [PMID: 31022944 PMCID: PMC6515460 DOI: 10.3390/ma12081336] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 04/16/2019] [Accepted: 04/19/2019] [Indexed: 11/25/2022]
Abstract
Water electrolysis is a promising approach to hydrogen production from renewable energy sources. Alkaline water electrolyzers allow using non-noble and low-cost materials. An analysis of common assumptions and experimental conditions (low concentrations, low temperature, low current densities, and short-term experiments) found in the literature is reported. The steps to estimate the reaction overpotentials for hydrogen and oxygen reactions are reported and discussed. The results of some of the most investigated electrocatalysts, namely from the iron group elements (iron, nickel, and cobalt) and chromium are reported. Past findings and recent progress in the development of efficient anode and cathode materials appropriate for large-scale water electrolysis are presented. The experimental work is done involving the direct-current electrolysis of highly concentrated potassium hydroxide solutions at temperatures between 30 and 100 °C, which are closer to industrial applications than what is usually found in literature. Stable cell components and a good performance was achieved using Raney nickel as a cathode and stainless steel 316L as an anode by means of a monopolar cell at 75 °C, which ran for one month at 300 mA cm−2. Finally, the proposed catalysts showed a total kinetic overpotential of about 550 mV at 75 °C and 1 A cm−2.
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Affiliation(s)
- Alejandro N Colli
- Laboratoire d'Electrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, EPFL, Valais Wallis, Rue de l'Industrie 17 Case Postale 440, CH-1951 Sion, Switzerland.
- Universidad Nacional del Litoral, CONICET, Programa de Electroquímica Aplicada e Ingeniería Electroquímica (PRELINE), Facultad de Ingeniería Química, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina.
| | - Hubert H Girault
- Laboratoire d'Electrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, EPFL, Valais Wallis, Rue de l'Industrie 17 Case Postale 440, CH-1951 Sion, Switzerland.
| | - Alberto Battistel
- Laboratoire d'Electrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, EPFL, Valais Wallis, Rue de l'Industrie 17 Case Postale 440, CH-1951 Sion, Switzerland.
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