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Ali A, Iqbal N, Noor T, Imtiaz U. Nanostructured Mn-doped Zn N C @reduced graphene oxide as high performing electrocatalyst for oxygen reduction reaction. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116324] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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2
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Liu F, Zhang X, Zhang X, Wang L, Liu M, Zhang J. Dual-template strategy for electrocatalyst of cobalt nanoparticles encapsulated in nitrogen-doped carbon nanotubes for oxygen reduction reaction. J Colloid Interface Sci 2021; 581:523-532. [DOI: 10.1016/j.jcis.2020.07.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 01/18/2023]
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3
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An B, Li J, Wu X, Li W, Li Y, Sun L, Mi H, Zhang Q, He C, Ren X. One-pot synthesis of N,S-doped pearl chain tube-loaded Ni 3S 2 composite materials for high-performance lithium-air batteries. NANOSCALE 2020; 12:21770-21779. [PMID: 33095215 DOI: 10.1039/d0nr06344d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
To improve the high reversibility of lithium-air batteries, an air electrode needs to have excellent electrochemical performance and spatial structure. Ni3S2 nanoparticles are loaded onto an N,S-doped pearl chain tube (N,S-PCT) by a method called quasi-chemical vapor deposition (Q-CVD). Additionally, N and S are doped during the synthesis process, thereby forming an ideal pipe rack-like structure. The large amount of space in the tube rack can provide sufficient storage to act as a buffer for the discharge products, and the interconnected tubes can effectively promote the dispersion of O2 and electrolyte. The addition of Ni3S2 nanoparticles effectively reduces the charge transfer resistance, thereby increasing the electron mobility of the cathode. Ni3S2@N,S-PCT cathodes effectively improve the cycling and high-rate performance of lithium-air batteries, demonstrating an ultrahigh discharge capacity of 16 733.7 mA h g-1 at a current density of 400 mA g-1 and an ultrahigh discharge capacity of 5088.1 mA h g-1 at a current density of 1000 mA g-1. When the cut-off capacity is 1000 mA h g-1, the battery with the Ni3S2@N,S-PCT-800 electrode can achieve cycling stability for 148 cycles. This research provides a new solution for the design of lithium-air batteries with high electrocatalytic performance.
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Affiliation(s)
- Bohan An
- College of Chemistry and Environmental Engineering, Shenzhen University, Guangdong 518060, PR China.
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4
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Facile preparation of CoO nanoparticles embedded N-doped porous carbon from conjugated microporous polymer for oxygen reduction reaction. J Colloid Interface Sci 2020; 562:550-557. [DOI: 10.1016/j.jcis.2019.11.079] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/15/2019] [Accepted: 11/18/2019] [Indexed: 11/20/2022]
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5
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Wahab A, Iqbal N, Noor T, Ashraf S, Raza MA, Ahmad A, Khan UA. Thermally reduced mesoporous manganese MOF @reduced graphene oxide nanocomposite as bifunctional electrocatalyst for oxygen reduction and evolution. RSC Adv 2020; 10:27728-27742. [PMID: 35516955 PMCID: PMC9055589 DOI: 10.1039/d0ra04193a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 07/15/2020] [Indexed: 11/23/2022] Open
Abstract
Oxygen electrocatalysis plays a crucial role in harnessing energy from modern renewable energy technologies like fuel cells and metal–air batteries. But high cost and stability issues of noble metal catalysts call for research on tailoring novel metal–organic framework (MOF) based architectures which can bifunctionally catalyze O2 reduction and evolution reactions (ORR & OER). In this work, we report a novel manganese MOF @rGO nanocomposite synthesized using a facile self-templated solvothermal method. The nanocomposite is superior to commercial Pt/C catalyst both in material resource and effectiveness in application. A more positive cathodic peak (Epc = 0.78 V vs. RHE), onset (Eonset = 1.09 V vs. RHE) and half wave potentials (E1/2 = 0.98 V vs. RHE) for the ORR and notable potential to achieve the threshold current density (E@10 mA cm−2= 1.84 V vs. RHE) for OER are features promising to reduce overpotentials during ORR and OER. Small Tafel slopes, methanol tolerance and acceptable short term stability augment the electrocatalytic properties of the as-prepared nanocomposite. Remarkable electrocatalytic features are attributed to the synergistic effect from the mesoporous 3D framework and transition metal–organic composition. Template directed growth, tunable porosities, novel architecture and excellent electrocatalytic performance of the manganese MOF @rGO nanocomposite make it an excellent candidate for energy applications. Oxygen electrocatalysis plays a crucial role in harnessing energy from modern renewable energy technologies like fuel cells and metal–air batteries.![]()
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Affiliation(s)
- Abdul Wahab
- U.S.-Pakistan Center for Advanced Studies in Energy
- National University of Sciences and Technology
- Islamabad 44000
- Pakistan
| | - Naseem Iqbal
- U.S.-Pakistan Center for Advanced Studies in Energy
- National University of Sciences and Technology
- Islamabad 44000
- Pakistan
| | - Tayyaba Noor
- School of Chemical and Materials Engineering
- National University of Sciences and Technology
- Islamabad 44000
- Pakistan
| | - Sheeraz Ashraf
- U.S.-Pakistan Center for Advanced Studies in Energy
- National University of Sciences and Technology
- Islamabad 44000
- Pakistan
| | - Muhammad Arslan Raza
- U.S.-Pakistan Center for Advanced Studies in Energy
- National University of Sciences and Technology
- Islamabad 44000
- Pakistan
| | - Awais Ahmad
- U.S.-Pakistan Center for Advanced Studies in Energy
- National University of Sciences and Technology
- Islamabad 44000
- Pakistan
| | - Usman Ali Khan
- U.S.-Pakistan Center for Advanced Studies in Energy
- National University of Sciences and Technology
- Islamabad 44000
- Pakistan
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6
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Li X, Zhu T, Wen C, Yang Y, Ma S, Huang X, Li H, Sun G. Mixed spinel and perovskite phased LaSrNiO nanoparticles as cathode catalyst for non-aqueous lithium-oxygen batteries. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.05.054] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Hybrid cobalt-based electrocatalysts with adjustable compositions for electrochemical water splitting derived from Co2+-Loaded MIL-53(Fe) particles. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.08.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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PPy enhanced Fe, W Co-doped Co3O4 free-standing electrode for highly-efficient oxygen evolution reaction. J APPL ELECTROCHEM 2018. [DOI: 10.1007/s10800-018-1211-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Deng Z, Ma Z, Li Y, Li Y, Chen L, Yang X, Wang HE, Su BL. Boosting Lithium-Ion Storage Capability in CuO Nanosheets via Synergistic Engineering of Defects and Pores. Front Chem 2018; 6:428. [PMID: 30320061 PMCID: PMC6166579 DOI: 10.3389/fchem.2018.00428] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 08/30/2018] [Indexed: 02/02/2023] Open
Abstract
CuO is a promising anode material for lithium-ion batteries due to its high theoretical capacity, low cost, and non-toxicity. However, its practical application has been plagued by low conductivity and poor cyclability. Herein, we report the facile synthesis of porous defective CuO nanosheets by a simple wet-chemical route paired with controlled annealing. The sample obtained after mild heat treatment (300°C) exhibits an improved crystallinity with low dislocation density and preserved porous structure, manifesting superior Li-ion storage capability with high capacity (~500 mAh/g at 0.2 C), excellent rate (175 mAh/g at 2 C), and cyclability (258 mAh/g after 500 cycles at 0.5 C). The enhanced electrochemical performance can be ascribed to the synergy of porous nanosheet morphology and improved crystallinity: (1) porous morphology endows the material a large contact interface for electrolyte impregnation, enriched active sites for Li-ion uptake/release, more room for accommodation of repeated volume variation during lithiation/de-lithiation. (2) the improved crystallinity with reduced edge dislocations can boost the electrical conduction, reducing polarization during charge/discharge. The proposed strategy based on synergic pore and defect engineering can pave the way for development of advanced metal oxides-based electrodes for (beyond) Li-ion batteries.
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Affiliation(s)
- Zhao Deng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
| | - Zhiyuan Ma
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
| | - Yanhui Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
| | - Yu Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
| | - Lihua Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
| | - Xiaoyu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
| | - Hong-En Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
| | - Bao-Lian Su
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
- Laboratory of Inorganic Materials Chemistry, University of Namur, Namur, Belgium
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10
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Wang KX, Zhu QC, Chen JS. Strategies toward High-Performance Cathode Materials for Lithium-Oxygen Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800078. [PMID: 29750439 DOI: 10.1002/smll.201800078] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 02/09/2018] [Indexed: 06/08/2023]
Abstract
Rechargeable aprotic lithium (Li)-O2 batteries with high theoretical energy densities are regarded as promising next-generation energy storage devices and have attracted considerable interest recently. However, these batteries still suffer from many critical issues, such as low capacity, poor cycle life, and low round-trip efficiency, rendering the practical application of these batteries rather sluggish. Cathode catalysts with high oxygen reduction reaction (ORR) and evolution reaction activities are of particular importance for addressing these issues and consequently promoting the application of Li-O2 batteries. Thus, the rational design and preparation of the catalysts with high ORR activity, good electronic conductivity, and decent chemical/electrochemical stability are still challenging. In this Review, the strategies are outlined including the rational selection of catalytic species, the introduction of a 3D porous structure, the formation of functional composites, and the heteroatom doping which succeeded in the design of high-performance cathode catalysts for stable Li-O2 batteries. Perspectives on enhancing the overall electrochemical performance of Li-O2 batteries based on the optimization of the properties and reliability of each part of the battery are also made. This Review sheds some new light on the design of highly active cathode catalysts and the development of high-performance lithium-O2 batteries.
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Affiliation(s)
- Kai-Xue Wang
- Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Qian-Cheng Zhu
- Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
- Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Shaanxi, 710021, P. R. China
| | - Jie-Sheng Chen
- Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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11
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Kim IG, Nah IW, Park S. Enhanced Oxygen Reduction Stability and Activity by Co and N (or O) Interaction in CoO on N-Doped Carbon Prepared through Spray Pyrolysis. ChemElectroChem 2018. [DOI: 10.1002/celc.201800396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- In Gyeom Kim
- Department of Chemical Engineering; Kwangwoon University; 20 Kwangwoon-ro, Nowon-gu Seoul 01897 Repubilic of Korea
- Center for Energy Convengence; Korea Institute of Science & Technology (KIST); 5, Hwarang-ro 14-gil, Seongbuk-gu Seoul 02792 Republic of Korea
| | - In Wook Nah
- Center for Energy Convengence; Korea Institute of Science & Technology (KIST); 5, Hwarang-ro 14-gil, Seongbuk-gu Seoul 02792 Republic of Korea
| | - Sehkyu Park
- Department of Chemical Engineering; Kwangwoon University; 20 Kwangwoon-ro, Nowon-gu Seoul 01897 Repubilic of Korea
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12
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Feng J, Li Q, Wang H, Zhang M, Yang X, Yuan R, Chai Y. Core-shell structured MnSiO 3 supported with CNTs as a high capacity anode for lithium-ion batteries. Dalton Trans 2018; 47:5328-5334. [PMID: 29589020 DOI: 10.1039/c7dt04886f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Metal silicates are good candidates for use in lithium ion batteries (LIBs), however, their electrochemical performance is hindered by their poor electrical conductivity and volume expansion during Li+ insertion/desertion. In this work, one-dimensional core-shell structured MnSiO3 supported with carbon nanotubes (CNTs) (referred to as CNT@MnSiO3) with good conductivity and electrochemical performance has been successfully synthesized using a solvothermal process under moderate conditions. In contrast to traditional composites of CNTs and nanoparticles, the CNT@MnSiO3 composite in this work is made up of CNTs with a layer of MnSiO3 on the surface. The one-dimensional CNT@MnSiO3 nanotubes provide a useful channel for transferring Li+ ions during the discharge/charge process, which accelerates the Li+ diffusion speed. The CNTs inside the structure not only enhance the conductivity of the composite, but also prevent volume expansion. A high reversible capacity (920 mA h g-1 at 500 mA g-1 over 650 cycles) and good rate performance were obtained for CNT@MnSiO3, showing that this strategy of synthesizing coaxial CNT@MnSiO3 nanotubes offers a promising method for preparing other silicates for LIBs or other applications.
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Affiliation(s)
- Jing Feng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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13
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Wang R, Chen Z, Hu N, Xu C, Shen Z, Liu J. Nanocarbon-Based Electrocatalysts for Rechargeable Aqueous Li/Zn-Air Batteries. ChemElectroChem 2018. [DOI: 10.1002/celc.201800141] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ronghua Wang
- College of Materials Science and Engineering; Chongqing University; Chongqing 400044 P.R. China
| | - Zhen Chen
- Division of Physics and Applied Physics; School of Physical and Mathematical Sciences; Nanyang Technological University; 637371 Singapore
| | - Ning Hu
- The State Key Laboratory of Mechanical Transmissions, and College of Aerospace Engineering; Chongqing University; Chongqing 400044 P.R. China
| | - Chaohe Xu
- The State Key Laboratory of Mechanical Transmissions, and College of Aerospace Engineering; Chongqing University; Chongqing 400044 P.R. China
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems of the Ministry of Education of China; Chongqing 400044 China
| | - Zexiang Shen
- Division of Physics and Applied Physics; School of Physical and Mathematical Sciences; Nanyang Technological University; 637371 Singapore
| | - Jilei Liu
- College of Materials Science and Engineering; Hunan University; Changsha 410082 China
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14
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Wei X, Li N, Zhang X. Co/CoO/C@B three-phase composite derived from ZIF67 modified with NaBH 4 solution as the electrocatalyst for efficient oxygen evolution. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.01.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Li XC, She FS, Shen D, Liu CP, Chen LH, Li Y, Deng Z, Chen ZH, Wang HE. Coherent nanoscale cobalt/cobalt oxide heterostructures embedded in porous carbon for the oxygen reduction reaction. RSC Adv 2018; 8:28625-28631. [PMID: 35542476 PMCID: PMC9084347 DOI: 10.1039/c8ra04256j] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 08/06/2018] [Indexed: 12/12/2022] Open
Abstract
Cost-effective and efficient electrocatalysts for the oxygen reduction reaction (ORR) are crucial for fuel cells and metal–air batteries.
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Affiliation(s)
- Xue-Cheng Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- China
| | - Fa-Shuang She
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- China
| | - Dong Shen
- Department of Chemistry and Center of Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- China
| | - Chao-Ping Liu
- Department of Physics
- City University of Hong Kong
- China
| | - Li-Hua Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- China
| | - Yu Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- China
| | - Zhao Deng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- China
| | - Zhen-Hua Chen
- Shanghai Synchrotron Radiation Facility (SSRF)
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- China
| | - Hong-En Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- China
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16
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Guo C, Wei S, Zhou S, Zhang T, Wang Z, Ng SP, Lu X, Wu CML, Guo W. Initial Reduction of CO 2 on Pd-, Ru-, and Cu-Doped CeO 2(111) Surfaces: Effects of Surface Modification on Catalytic Activity and Selectivity. ACS APPLIED MATERIALS & INTERFACES 2017; 9:26107-26117. [PMID: 28718617 DOI: 10.1021/acsami.7b07945] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Surface modification by metal doping is an effective treatment technique for improving surface properties for CO2 reduction. Herein, the effects of doped Pd, Ru, and Cu on the adsorption, activation, and reduction selectivity of CO2 on CeO2(111) were investigated by periodic density functional theory. The doped metals distorted the configuration of a perfect CeO2(111) by weakening the adjacent Ce-O bond strength, and Pd doping was beneficial for generating a highly active O vacancy. The analyses of adsorption energy, charge density difference, and density of states confirmed that the doped metals were conducive for enhancing CO2 adsorption, especially for Cu/CeO2(111). The initial reductive dissociation CO2 → CO* + O* on metal-doped CeO2(111) followed the sequence of Cu- > perfect > Pd- > Ru-doped CeO2(111); the reductive hydrogenation CO2 + H → COOH* followed the sequence of Cu- > perfect > Ru- > Pd-doped CeO2(111), in which the most competitive route on Cu/CeO2(111) was exothermic by 0.52 eV with an energy barrier of 0.16 eV; the reductive hydrogenation CO2 + H → HCOO* followed the sequence of Ru- > perfect > Pd-doped CeO2(111). Energy barrier decomposition analyses were performed to identify the governing factors of bond activation and scission along the initial CO2 reduction routes. Results of this study provided deep insights into the effect of surface modification on the initial reduction mechanisms of CO2 on metal-doped CeO2(111) surfaces.
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Affiliation(s)
- Chen Guo
- College of Science, China University of Petroleum , Qingdao, Shandong 266580, P. R. China
| | - Shuxian Wei
- College of Science, China University of Petroleum , Qingdao, Shandong 266580, P. R. China
| | - Sainan Zhou
- College of Science, China University of Petroleum , Qingdao, Shandong 266580, P. R. China
| | - Tian Zhang
- College of Science, China University of Petroleum , Qingdao, Shandong 266580, P. R. China
| | - Zhaojie Wang
- College of Science, China University of Petroleum , Qingdao, Shandong 266580, P. R. China
| | - Siu-Pang Ng
- Department of Physics and Materials Science, City University of Hong Kong , Hong Kong SAR, P. R. China
| | - Xiaoqing Lu
- College of Science, China University of Petroleum , Qingdao, Shandong 266580, P. R. China
| | - Chi-Man Lawrence Wu
- Department of Physics and Materials Science, City University of Hong Kong , Hong Kong SAR, P. R. China
| | - Wenyue Guo
- College of Science, China University of Petroleum , Qingdao, Shandong 266580, P. R. China
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Kim J, Jo H, Wu M, Yoon DH, Kang Y, Jung HK. Mesoporous amorphous binary Ru-Ti oxides as bifunctional catalysts for non-aqueous Li-O 2 batteries. NANOTECHNOLOGY 2017; 28:145401. [PMID: 28273053 DOI: 10.1088/1361-6528/aa6132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Mesoporous amorphous binary Ru-Ti oxides were prepared as bifunctional catalysts for non-aqueous Li-O2 batteries, and their electrochemical performance was investigated for the first time. A Li-O2 battery with mesoporous amorphous binary Ru-Ti oxides exhibited a remarkably high capacity of 27100 mAh g-1 as well as a reduced overpotential. A GITT analysis suggested that the introduction of amorphous TiO2 to amorphous RuO2 was responsible for the enhanced kinetics toward both the oxygen reduction reaction and oxygen evolution reaction. Excellent cyclic stability up to 230 cycles was achieved, confirming the applicability of the new bifunctional catalyst in non-aqueous Li-O2 batteries.
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Affiliation(s)
- Jisu Kim
- Advanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeongro, Yuseong, Daejeon 34114, Korea. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Korea
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