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Chen X, Kong Y, Yin H, Yang X, Zhao Q, Xiao D, Wang Z, Zhang Y, Xue Q. Unveiling the Enhancement of Electrocatalytic Oxygen Evolution Activity in Ru-Fe 2O 3/CoS Heterojunction Catalysts. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403427. [PMID: 39076054 DOI: 10.1002/smll.202403427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 07/19/2024] [Indexed: 07/31/2024]
Abstract
The development of highly efficient electrocatalysts for the sluggish anodic oxygen evolution reaction (OER) is crucial to meet the practical demand for water splitting. In this study, an effective approach is proposed that simultaneously enhances interfacial interaction and catalytic activity by modifying Fe2O3/CoS heterojunction using Ru doping strategy to construct an efficient electrocatalytic oxygen evolution catalyst. The unique morphology of Ru doped Fe2O3 (Ru-Fe2O3) nanoring decorated by CoS nanoparticles ensures a large active surface area and a high number of active sites. The designed Ru-Fe2O3/CoS catalyst achieves a low OER overpotential (264 mV) at 10 mA cm-2 and demonstrates exceptional stability even at high current density of 100 mA cm-2, maintaining its performance for an impressive duration of 90 h. The catalytic performance of this Ru-Fe2O3/CoS catalyst surpasses that of other iron-based oxide catalysts and even outperforms the state-of-the-art RuO2. Density functional theory (DFT) calculation as well as experimental in situ characterization confirm that the introduction of Ru atoms can enhance the interfacial electron interaction, accelerating the electron transfer, and serve as highly active sites reducing the energy barrier for rate determination step. This work provides an efficient strategy to reveal the enhancement of electrocatalytic oxygen evolution activity of heterojunction catalysts by doping engineering.
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Affiliation(s)
- Xue Chen
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, 273165, China
- School of Materials Science and Engineering, Jilin University, Changchun, 130022, China
| | - Yilin Kong
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, 273165, China
| | - Hongfei Yin
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, 273165, China
| | - Xiaoyong Yang
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, 273165, China
- Condensed Matter Theory Group, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala, 75120, Sweden
| | - Qiuyu Zhao
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, 273165, China
| | - Dongdong Xiao
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zhili Wang
- School of Materials Science and Engineering, Jilin University, Changchun, 130022, China
| | - Yongzheng Zhang
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, 273165, China
- Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - Qikun Xue
- Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
- Department of physics, Southern University of Science and Technology, Shenzhen, 518055, China
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Fu S, Peng C, Luo Y, Cheng L, Yang X, Jiao Z. Modulating space charge of FeP/CoP p-n heterojunction for boosting oxygen evolution reaction. J Colloid Interface Sci 2024; 664:349-359. [PMID: 38479271 DOI: 10.1016/j.jcis.2024.03.060] [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: 01/18/2024] [Revised: 02/25/2024] [Accepted: 03/09/2024] [Indexed: 04/07/2024]
Abstract
Surface reconstruction of electrocatalysts is an effective strategy to modulate the space charge distribution to enhance the electrocatalytic activity. The p-n heterostructured FeP/CoP-2D octagonal nanoplates were successfully constructed by cation-exchange method. The space charge effect caused by the p-n heterojunction accelerated the electron transfer, optimized the electronic structure, and improved the activity of the active sites during the oxygen evolution reaction process. As a result, FeP/CoP-2D required only 247 mV overpotential to achieve a current density of 10 mA cm-2 with a Tafel slope as low as 68 mV dec-1. Density-functional theory calculations confirmed that the construction of p-n heterojunctions can enhance the adsorption of *OH in the active centers and optimize the Gibbs free energy of the OER reaction. This study provides an effective and feasible strategy for constructing p-n heterojunctions to modulate the space charge state for optimizing the OER performance of electrocatalysts.
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Affiliation(s)
- Shaqi Fu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Cheng Peng
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Yuancong Luo
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Lingli Cheng
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China.
| | - Xuechun Yang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China.
| | - Zheng Jiao
- Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800, PR China.
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3
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Zhu W, Liu H, Pei Y, Liu T, Zhang J, Liu X, Wang L, Feng Y, Yin Y, Guiver MD. Defect-Engineered ZIF-Derived Non-Pt Cathode Catalyst at 1.5 mg cm -2 Loading for Proton Exchange Membrane Fuel Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302090. [PMID: 37376859 DOI: 10.1002/smll.202302090] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 06/11/2023] [Indexed: 06/29/2023]
Abstract
Due to the sluggish kinetics of the oxygen reduction reaction (ORR) by non-Pt based catalyst, high loading of catalyst is required to achieve satisfactory fuel cell performance, which inevitably leads to the increase of the catalyst layer thickness with serious mass transport resistance. Herein, a defective zeolitic imidazolate framework (ZIF) derived Co/Fe-N-C catalyst with small mesopores (2-4 nm) and high density of CoFe atomic active sites are prepared by regulating the Fe dosage and pyrolysis temperature. Molecular dynamics simulation and electrochemical tests indicate that > 2 nm mesopores show insignificant influence on the diffusion process of O2 and H2 O molecules, leading to the high utilization of active sites and low mass transport resistance. The proton exchange membrane fuel cell (PEMFC) shows a high-power density of 755 mW cm-2 with only 1.5 mg cm-2 of non-Pt catalyst in the cathode. No apparent performance loss caused by concentration difference can be observed, in particular in the high current density region (1 A cm-2 ). This work emphasizes the importance of small mesopore design in the Co/Fe-N-C catalyst, which is anticipated to provide essential guidance for the application of non-Pt catalysts.
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Affiliation(s)
- Weikang Zhu
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Haotian Liu
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Yabiao Pei
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Tao Liu
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Junfeng Zhang
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
- National Industry-Education Platform of Energy Storage, Tianjin University, Tianjin, 300072, P. R. China
| | - Xin Liu
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Lianqin Wang
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Yingjie Feng
- Department of Catalytic Science, SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing, 100013, P. R. China
| | - Yan Yin
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
- National Industry-Education Platform of Energy Storage, Tianjin University, Tianjin, 300072, P. R. China
| | - Michael D Guiver
- State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, P. R. China
- National Industry-Education Platform of Energy Storage, Tianjin University, Tianjin, 300072, P. R. China
- HaiHe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, P. R. China
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4
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Su N, Liu M, Qiu S, Hu C, Yin X, Xiao L, Hou L. Skeleton-coated CoCu-Based bimetal hollow nanoprisms as High-Performance electrocatalysts for oxygen evolution reaction. J Colloid Interface Sci 2023; 629:763-772. [PMID: 36193620 DOI: 10.1016/j.jcis.2022.09.085] [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: 08/01/2022] [Revised: 09/07/2022] [Accepted: 09/18/2022] [Indexed: 11/23/2022]
Abstract
CoSx materials with high catalytic activity are considered as promising HER electrocatalysts, but their inherent low electrical conductivity and easy loss of active sites have greatly limited their applications in OER electrocatalysis. Herein, we present a convenient method to synthesize Co-Cu hollow nanoprisms after wrapping and calcining with trithiocyanuric acid (C3H3N3S3) (denoted N-Co-Cu-S-x HNs). The results showed that Cu doping modified the charge density of Co center, leading to the enhancement of the intrinsic activity of the Co3S4 active center, meanwhile wrapping trithiocyanuric acid on the surfaces and calcinating to form N-containing C skeleton as a flexible substrate to encapsulate the catalysts, which effectively protected the active sites inside the catalysts. Notably, the OER catalyst that was optimized by adjusting the metal ratio and controlling the trithiocyanuric acid incorporation exhibited a low overpotential of 306 mV under a current density of 10 mA cm-2 and showed a superior durability of more than 27 h. This work may provide some insights into the preparation of oxygen evolution reaction catalysts with excellent performance through doping transition metals and protecting the internal active sites strategies.
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Affiliation(s)
- Nan Su
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Mengying Liu
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Silong Qiu
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Congyi Hu
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Xiangyu Yin
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Longqiang Xiao
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China; Qingyuan Innovation Laboratory, Quanzhou 362801, China.
| | - Linxi Hou
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China; Qingyuan Innovation Laboratory, Quanzhou 362801, China; Fujian Key Laboratory of Advanced Manufacturing Technology of Specialty Chemicals, Fuzhou University, Fuzhou 350116, China.
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5
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Tailoring the structure and function of metal organic framework by chemical etching for diverse applications. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214699] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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6
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Zhang Y, Qi L. MOF-derived nanoarrays as advanced electrocatalysts for water splitting. NANOSCALE 2022; 14:12196-12218. [PMID: 35968835 DOI: 10.1039/d2nr03411e] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Developing efficient, nanostructured electrocatalysts with the desired compositions and structures is of great significance for improving the efficiency of water splitting toward hydrogen production. In this regard, metal-organic framework (MOF) derived nanoarrays have attracted great attention as promising electrocatalysts because of their diverse compositions and adjustable structures. In this review, the recent progress in MOF-derived nanoarrays for electrochemical water splitting is summarized, highlighting the structural design of the MOF-derived nanoarrays and the electrocatalytic performance of the derived composite carbon materials, oxides, hydroxides, sulfides, and phosphides. In particular, the structure-performance relationships of the MOF-derived nanoarrays and the modulation strategies toward enhanced catalytic activity for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are discussed, providing insights into the development of advanced catalysts for the HER and OER. The challenges and prospects in this promising field for future industrial applications are also addressed.
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Affiliation(s)
- Yujing Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry, Peking University, Beijing 100871, China.
| | - Limin Qi
- Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry, Peking University, Beijing 100871, China.
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7
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Jadhav HS, Bandal HA, Ramakrishna S, Kim H. Critical Review, Recent Updates on Zeolitic Imidazolate Framework-67 (ZIF-67) and Its Derivatives for Electrochemical Water Splitting. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2107072. [PMID: 34846082 DOI: 10.1002/adma.202107072] [Citation(s) in RCA: 77] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 11/08/2021] [Indexed: 06/13/2023]
Abstract
Design and construction of low-cost electrocatalysts with high catalytic activity and long-term stability is a challenging task in the field of catalysis. Metal-organic frameworks (MOF) are promising candidates as precursor materials in the development of highly efficient electrocatalysts for energy conversion and storage applications. This review starts with a summary of basic concepts and key evaluation parameters involved in the electrochemical water-splitting reaction. Then, different synthesis approaches reported for the cobalt-based Zeolitic imidazolate framework (ZIF-67) and its derivatives are critically reviewed. Additionally, several strategies employed to enhance the electrocatalytic activity and stability of ZIF-67-based electrocatalysts are discussed in detail. The present review provides a succinct insight into the ZIF-67 and its derivatives (oxides, hydroxides, sulfides, selenides, phosphide, nitrides, telluride, heteroatom/metal-doped carbon, noble metal-supported ZIF-67 derivatives) reported for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting applications. Finally, this review concludes with the associated challenges and the perspectives on developing the best economic, durable electrocatalytic materials.
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Affiliation(s)
- Harsharaj S Jadhav
- Department of Energy Science and Technology, Environmental Waste Recycle Institute, Myongji University, Yongin, Gyeonggi-do, 17058, Republic of Korea
| | - Harshad A Bandal
- Department of Energy Science and Technology, Environmental Waste Recycle Institute, Myongji University, Yongin, Gyeonggi-do, 17058, Republic of Korea
| | - Seeram Ramakrishna
- Center for Nanotechnology and Sustainability, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - Hern Kim
- Department of Energy Science and Technology, Environmental Waste Recycle Institute, Myongji University, Yongin, Gyeonggi-do, 17058, Republic of Korea
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8
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Wen H, Zhang S, Yu T, Yi Z, Guo R. ZIF-67-based catalysts for oxygen evolution reaction. NANOSCALE 2021; 13:12058-12087. [PMID: 34231644 DOI: 10.1039/d1nr01669e] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As a new type of crystalline porous material, the imidazole zeolite framework (ZIF) has attracted widespread attention due to its ultra-high surface area, large pore volume, and unique advantage of easy functionalization. Developing different methods to control the shape and composition of ZIF is very important for its practical application as catalyst. In recent years, nano-ZIF has been considered an electrode material with excellent oxygen evolution reaction (OER) performance, which provides a new way to research electrolyzed water. This review focuses on the morphological engineering of the original ZIF-67 and its derivatives (core-shell, hollow, and array structures) through doping (cation doping, anion doping, and co-doping), derivative composition engineering (metal oxide, phosphide, sulfide, selenide, and telluride), and the corresponding single-atom catalysis. Besides, combined with DFT calculations, it emphasizes the in-depth understanding of actual active sites and provides insights into the internal mechanism of enhancing the OER and proposes the challenges and prospects of ZIF-67 based electrocatalysts. We summarize the application of ZIF-67 and its derivatives in the OER for the first time, which has significantly guided research in this field.
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Affiliation(s)
- Hui Wen
- School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
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9
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Fang W, Wang J, Hu Y, Cui X, Zhu R, Zhang Y, Yue C, Dang J, Cui W, Zhao H, Li Z. Metal-organic framework derived Fe-Co-CN/reduced graphene oxide for efficient HER and OER. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137384] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Wang T, Yang C, Liu Y, Yang M, Li X, He Y, Li H, Chen H, Lin Z. Dual-Shelled Multidoped Hollow Carbon Nanocages with Hierarchical Porosity for High-Performance Oxygen Reduction Reaction in Both Alkaline and Acidic Media. NANO LETTERS 2020; 20:5639-5645. [PMID: 32639740 DOI: 10.1021/acs.nanolett.0c00081] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The rational design and facile synthesis of metal organic framework (MOF)-derived carbon materials with high oxygen reduction reaction (ORR) activity still remains challenging. Herein, we report on a simple yet robust route to dual-shelled Co, N, and S co-doped hollow carbon nanocages (denoted Co-N/S-DSHCN) with outstanding ORR performance. The concurrent compositional and structural engineering of the zeolitic imidazolate framework (ZIF-67), enabled by its coating with trithiocyanuric acid (TCA), yields core-shelled precursor particles which are subsequently carbonized into Co-N/S-DSHCN. Notably, Co-N/S-DSHCN-3.5 outperforms the commercial Pt/C, representing a +25 mV onset potential (Eon) and a +43 mV half-wave potential (E1/2) in 0.1 M KOH and a comparable E1/2 to Pt/C in 0.5 M H2SO4, respectively. Such impressive ORR activities of Co-N/S-DSHCN-3.5 originate from the effective synergy of Co, N, and S co-doping (i.e., a compositional tuning) in conjunction with a unique dual-shelled hollow architecture containing hierarchical porosity (i.e., a structural tailoring).
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Affiliation(s)
- Teng Wang
- College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Chao Yang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Yijiang Liu
- College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Mei Yang
- College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Xufeng Li
- College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Yan He
- College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Huaming Li
- College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Hongbiao Chen
- College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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11
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Efficient electrochemical reduction of carbon dioxide into ethylene boosted by copper vacancies on stepped cuprous oxide. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2020.01.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Zhang X, Lu Y, Chen Q, Huang Y. A tunable bifunctional hollow Co3O4/MO3 (M = Mo, W) mixed-metal oxide nanozyme for sensing H2O2 and screening acetylcholinesterase activity and its inhibitor. J Mater Chem B 2020; 8:6459-6468. [DOI: 10.1039/d0tb01337d] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Mo and W tunable bifunctional hollow Co3O4/MO3 mixed-metal oxide nanozymes were fabricated. They exhibit similar O2 activating ability, while their discrepant H2O2 activating capability is likely ascribed to different catalytic mechanisms.
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Affiliation(s)
- Xiaodan Zhang
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- China
| | - Yuwan Lu
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- China
| | - Qiumeng Chen
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- China
| | - Yuming Huang
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- China
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Abdi Z, Bagheri R, Song Z, Najafpour MM. Water oxidation by Ferritin: A semi-natural electrode. Sci Rep 2019; 9:11499. [PMID: 31395911 PMCID: PMC6687787 DOI: 10.1038/s41598-019-47661-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 07/16/2019] [Indexed: 02/07/2023] Open
Abstract
Ferritin is a protein (ca. 12 nm) with a central pocket of 6 nm diameter, and hydrated iron oxide stored in this central cavity of this protein. The protein shell has a complicated structure with 24 subunits. Transmission electron microscopy images of ferritin showed nanosized iron oxides (ca. 4-6 nm) in the protein structure. In high-resolution transmission electron microscopy images of the iron core, d-spacings of 2.5-2.6 Å were observed, which is corresponded to d-spacings of ferrihydrite crystal structure. Our experiments showed that at pH 11, the modified electrode by this biomolecule is active for water oxidation (turnover frequency: 0.001 s-1 at 1.7 V). Using affected by bacteria, we showed that Fe ions in the structure of ferritin are critical for water oxidation.
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Affiliation(s)
- Zahra Abdi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran
| | - Robabeh Bagheri
- Surface Protection Research Group, Surface Department, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 519 Zhuangshi Road, Ningbo, 315201, China
| | - Zhenlun Song
- Surface Protection Research Group, Surface Department, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 519 Zhuangshi Road, Ningbo, 315201, China
| | - Mohammad Mahdi Najafpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran. .,Center of Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran. .,Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran.
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