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Xu H, Zhang D, Liu M, Ye D, Huo S, Chen W, Zhang J. Self-supporting hierarchical Co 3O 4-nanowires@NiO-nanosheets core-shell nanostructure on carbon foam to form efficient bifunctional electrocatalyst for overall water splitting. J Colloid Interface Sci 2024; 654:1293-1302. [PMID: 37913718 DOI: 10.1016/j.jcis.2023.10.116] [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: 07/24/2023] [Revised: 10/17/2023] [Accepted: 10/22/2023] [Indexed: 11/03/2023]
Abstract
Designing cost-effective and robust bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is highly desired in hydrogen production from overall water splitting, but still suffers great challenges due to the sluggish catalytic OER/HER kinetics. In this paper, a surface/defect engineering strategy is developed to synthesize three-dimensional (3D) carbon foam (CF)-supported unique hierarchical Co3O4 nanowires@NiO nanosheets core-shell nanostructured catalyst (NiO@Co3O4/CF) with rich oxygen-vacancies as a novel bifunctional catalyst for alkaline water splitting electrolysis. Benefited from the synergy of the 3D hierarchical core-shell structure and rich oxygen vacancies, the as-obtained NiO@Co3O4/CF shows both excellent OER (η200 = 325 mV, η500 = 374 mV) and HER (η10 = 104 mV) activities with low Tafel slopes (64.26 mV dec-1 for OER and 109.14 mV dec-1 for HER, respectively) and outstanding stability. A simple overall water splitting electrolysis cell assembled by this bifunctional NiO@Co3O4/CF as both OER and HER catalysts requires only a cell voltage of 1.53 V to obtain the current density of 10 mA cm-2 and displays a long-term stability. This work has successfully developed an approach for rational design and novel synthesis of metal oxide hybrids as bifunctional electrocatalysts with high activity and stability for overall water splitting.
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Affiliation(s)
- Huan Xu
- Institute for Sustainable Energy, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Dan Zhang
- Institute for Sustainable Energy, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Minmin Liu
- Institute for Sustainable Energy, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Daixin Ye
- Institute for Sustainable Energy, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Shengjuan Huo
- Institute for Sustainable Energy, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Wei Chen
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China; University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui 230026, PR China; School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi 541004, PR China
| | - Jiujun Zhang
- Institute for Sustainable Energy, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
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Liu Q, Wen G, Zhao D, Xie L, Sun S, Zhang L, Luo Y, Ali Alshehri A, Hamdy MS, Kong Q, Sun X. Nitrite reduction over Ag nanoarray electrocatalyst for ammonia synthesis. J Colloid Interface Sci 2022; 623:513-9. [PMID: 35597020 DOI: 10.1016/j.jcis.2022.04.173] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 04/27/2022] [Accepted: 04/30/2022] [Indexed: 01/08/2023]
Abstract
Electrochemical reduction of nitrite to ammonia can simultaneously achieve ammonia synthesis and N-contaminant removal under mild conditions, which has attracted widespread attention but still lacks efficient catalysts. In this work, Ag nanoarray using NiO nanosheets array on carbon cloth as support is reported as an efficient electrocatalyst to selectively reduce nitrite to ammonia. In 0.1 M NaOH with 0.1 M NO2-, such catalyst exhibits a maximum ammonia yield of 5,751 μg h-1 cm-2 (57,510 μg h-1 mgAg-1) and high Faradaic efficiency up to 97.7 %. Density functional theory calculations applied to uncover the catalytic mechanism of NO2- reduction reaction on Ag.
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Wei L, Zeng D, Xie Z, Zeng Q, Zheng H, Fujita T, Wei Y. NiO Nanosheets Coupled With CdS Nanorods as 2D/1D Heterojunction for Improved Photocatalytic Hydrogen Evolution. Front Chem 2021; 9:655583. [PMID: 33937197 PMCID: PMC8082420 DOI: 10.3389/fchem.2021.655583] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/22/2021] [Indexed: 11/30/2022] Open
Abstract
Designing low-cost, environment friendly, and highly active photocatalysts for water splitting is a promising path toward relieving energy issues. Herein, one-dimensional (1D) cadmium sulfide (CdS) nanorods are uniformly anchored onto two-dimensional (2D) NiO nanosheets to achieve enhanced photocatalytic hydrogen evolution. The optimized 2D/1D NiO/CdS photocatalyst exhibits a remarkable boosted hydrogen generation rate of 1,300 μmol h-1 g-1 under visible light, which is more than eight times higher than that of CdS nanorods. Moreover, the resultant 5% NiO/CdS composite displays excellent stability over four cycles for photocatalytic hydrogen production. The significantly enhanced photocatalytic activity of the 2D/1D NiO/CdS heterojunction can be attributed to the efficient separation of photogenerated charge carriers driven from the formation of p-n NiO/CdS heterojunction. This study paves a new way to develop 2D p-type NiO nanosheets-decorated n-type semiconductor photocatalysts for photocatalytic applications.
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Affiliation(s)
- Lin Wei
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Deqian Zeng
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Zongzhuo Xie
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Qingru Zeng
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Hongfei Zheng
- Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, China
| | - Toyohisa Fujita
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Yuezhou Wei
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, China
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Sabouri Z, Akbari A, Hosseini HA, Khatami M, Darroudi M. Tragacanth-mediate synthesis of NiO nanosheets for cytotoxicity and photocatalytic degradation of organic dyes. Bioprocess Biosyst Eng 2020; 43:1209-1218. [PMID: 32144597 DOI: 10.1007/s00449-020-02315-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [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: 12/05/2019] [Accepted: 02/19/2020] [Indexed: 01/24/2023]
Abstract
In this study, NiO nanosheets have been manufactured using a co-precipitation approach that involved the usage of nickel nitrate (Ni (NO3)2.6H2O) as the raw material and tragacanth in the role of a stabilizing agent. NiO nanosheets have been fabricated through the reduction of nickel nitrate solution that had been obtained by the application of aqueous extract of tragacanth, which is capable of functioning as a reducing and stabilizing agent. In the following, the physical and chemical properties of tragacanth-stabilized NiO nanosheets have been identified via FESEM, EDS, XRD, UV-Vis, and FT-IR techniques. According to the XRD pattern, these particular nanosheets have contained a cubic structure and group space Fm3m, along with the average size of about 18 to 43 nm that had been in agreement with the FESEM measurements. In addition, we have evaluated the photocatalytic activity of tragacanth-stabilized NiO nanosheets on the degradations of methylene blue (MB) and methyl orange (MO) dyes. The performed photocatalytic assessment has displayed that the nanosheets can degrade 82% of MO within 210 min and 60% of MB in 300 min. The cytotoxicity of tragacanth-stabilized NiO nanosheets on human Glioblastoma cancer (U87MG) cell lines has been investigated via the MTT assay, while it has been detected in the obtained results that the inhibitory concentration (IC50) had been 125 µg/mL.
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Affiliation(s)
- Zahra Sabouri
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Chemistry Department, Payame Noor University, 19395-4697, Tehran, Iran
| | - Alireza Akbari
- Chemistry Department, Payame Noor University, 19395-4697, Tehran, Iran
| | | | - Mehrdad Khatami
- NanoBioEletrochemistry Research Center, Bam University of Medical Sciences, Bam, Iran
| | - Majid Darroudi
- Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. .,Department of Medical Biotechnology and Nanotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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Wu C, Zhang J, Wang X, Xie C, Shi S, Zeng D. Effect of Heterointerface on NO 2 Sensing Properties of In-Situ Formed TiO 2 QDs-Decorated NiO Nanosheets. Nanomaterials (Basel) 2019; 9:E1628. [PMID: 31744070 DOI: 10.3390/nano9111628] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/27/2019] [Accepted: 11/08/2019] [Indexed: 11/20/2022]
Abstract
In this work, TiO2 QDs-modified NiO nanosheets were employed to improve the room temperature NO2 sensing properties of NiO. The gas sensing studies showed that the response of nanocomposites with the optimal ratio to 60 ppm NO2 was nearly 10 times larger than that of bare NiO, exhibiting a potential application in gas sensing. Considering the commonly reported immature mechanism that the effective charge transfer between two phases contributes to an enhanced sensitivity, the QDs sensitization mechanism was further detailed by designing a series of contrast experiments. First, the important role of the QDs size effect was revealed by comparing the little enhanced sensitivity of TiO2 particle-modified NiO with the largely enhanced sensitivity of TiO2 QDs-NiO. Second, and more importantly, direct evidence of the heterointerface charge transfer efficiency was detailed by the extracted interface bond (Ti-O-Ni) using XPS peak fitting. This work can thus provide guidelines to design more QDs-modified nanocomposites with higher sensitivity for practical applications.
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Qian J, Bai X, Xi S, Xiao W, Gao D, Wang J. Bifunctional Electrocatalytic Activity of Nitrogen-Doped NiO Nanosheets for Rechargeable Zinc-Air Batteries. ACS Appl Mater Interfaces 2019; 11:30865-30871. [PMID: 31380619 DOI: 10.1021/acsami.9b08647] [Citation(s) in RCA: 10] [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] [Indexed: 06/10/2023]
Abstract
In order to improve the efficiencies and service lifetimes of rechargeable Zn-air batteries, it is necessary to develop highly efficient air electrocatalysts. In the present study, we prove that the bifunctional electrocatalytic activity in NiO nanosheets is effectively improved by the synergistic effects of N dopants and considerably porous structure. As an electrocatalyst for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), the as-prepared porous N-doped NiO nanosheets exhibit good activities with the small overpotential and ideal half-wave potential, which is superior to Ir/C electrocatalyst. Besides, it is proved that the process of HO* being oxidized to O* is the OER potential rate-determining step; also the OER electrocatalytic performance of NiO can be markedly promote by the doping of N atoms using the density functional theory calculations. Furthermore, the fabricated Zn-air battery based on the porous N-doped NiO nanosheets also exhibits superior activities, outperforming many reported NiO-based electrocatalyst materials. Two series Zn-air cells with a voltage of 2.80 V can power a red light-emitting diode, which shows their large potential for various applications.
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Affiliation(s)
- Jinmei Qian
- Key Laboratory for Magnetism and Magnetic Materials of MOE, Key Laboratory of Special Function Materials and Structure Design of MOE , Lanzhou University , Lanzhou 730000 , People's Republic of China
| | - Xiaowan Bai
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences , A*STAR , 1 Pesek Road , Jurong Island , 627833 , Singapore
| | - Wen Xiao
- Institute of Chemical and Engineering Sciences , A*STAR , 1 Pesek Road , Jurong Island , 627833 , Singapore
| | - Daqiang Gao
- Key Laboratory for Magnetism and Magnetic Materials of MOE, Key Laboratory of Special Function Materials and Structure Design of MOE , Lanzhou University , Lanzhou 730000 , People's Republic of China
| | - Jinlan Wang
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
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Yan H, Zhang D, Xu J, Lu Y, Liu Y, Qiu K, Zhang Y, Luo Y. Solution growth of NiO nanosheets supported on Ni foam as high-performance electrodes for supercapacitors. Nanoscale Res Lett 2014; 9:424. [PMID: 25276099 PMCID: PMC4177676 DOI: 10.1186/1556-276x-9-424] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 08/09/2014] [Indexed: 05/31/2023]
Abstract
Well-aligned nickel oxide (NiO) nanosheets with the thickness of a few nanometers supported on a flexible substrate (Ni foam) have been fabricated by a hydrothermal approach together with a post-annealing treatment. The three-dimensional NiO nanosheets were further used as electrode materials to fabricate supercapacitors, with high specific capacitance of 943.5, 791.2, 613.5, 480, and 457.5 F g(-1) at current densities of 5, 10, 15, 20, and 25 A g(-1), respectively. The NiO nanosheets combined well with the substrate. When the electrode material was bended, it can still retain 91.1% of the initial capacitance after 1,200 charging/discharging cycles. Compared with Co3O4 and NiO nanostructures, the specific capacitance of NiO nanosheets is much better. These characteristics suggest that NiO nanosheet electrodes are promising for energy storage application with high power demands.
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Affiliation(s)
- Hailong Yan
- School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, People's Republic of China
- Key Laboratory of Advanced Micro/Nano Functional Materials, Xinyang Normal University, Xinyang 464000, People's Republic of China
| | - Deyang Zhang
- School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, People's Republic of China
- Key Laboratory of Advanced Micro/Nano Functional Materials, Xinyang Normal University, Xinyang 464000, People's Republic of China
| | - Jinyou Xu
- School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, People's Republic of China
- Key Laboratory of Advanced Micro/Nano Functional Materials, Xinyang Normal University, Xinyang 464000, People's Republic of China
| | - Yang Lu
- School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, People's Republic of China
- Key Laboratory of Advanced Micro/Nano Functional Materials, Xinyang Normal University, Xinyang 464000, People's Republic of China
| | - Yunxin Liu
- Department of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, People's Republic of China
| | - Kangwen Qiu
- School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, People's Republic of China
- Key Laboratory of Advanced Micro/Nano Functional Materials, Xinyang Normal University, Xinyang 464000, People's Republic of China
| | - Yihe Zhang
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, People's Republic of China
| | - Yongsong Luo
- School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, People's Republic of China
- Key Laboratory of Advanced Micro/Nano Functional Materials, Xinyang Normal University, Xinyang 464000, People's Republic of China
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