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Xiao Z, Hou F, Zhang X, Pan L, Zou JJ, Li G. Highly Dispersed Mn-Doped Ceria Supported on N-Doped Carbon Nanotubes for Enhanced Oxygen Reduction Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10561-10570. [PMID: 38728666 DOI: 10.1021/acs.langmuir.4c00277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
The weak adsorption of oxygen on transition metal oxide catalysts limits the improvement of their electrocatalytic oxygen reduction reaction (ORR) performance. Herein, a dopamine-assisted method is developed to prepare Mn-doped ceria supported on nitrogen-doped carbon nanotubes (Mn-Ce-NCNTs). The morphology, dispersion of Mn-doped ceria, composition, and oxygen vacancies of the as-prepared catalysts were analyzed using various technologies. The results show that Mn-doped ceria was formed and highly dispersed on NCNTs, on which oxygen vacancies are abundant. The as-prepared Mn-Ce-NCNTs exhibit a high ORR performance, on which the average electron transfer number is 3.86 and the current density is 24.4% higher than that of commercial 20 wt % Pt/C. The peak power density of Mn-Ce-NCNTs is 68.1 mW cm-2 at the current density of 138.9 mA cm-2 for a Zn-air battery, which is close to that of 20 wt % Pt/C (69.4 mW cm-2 at 106.1 mA cm-2). Density functional theory (DFT) calculations show that the oxygen vacancy formation energies of Mn-doped CeO2(111) and pure CeO2(111) are -0.55 and 2.14 eV, respectively. Meanwhile, compared with undoped CeO2(111) (-0.02 eV), Mn-doped CeO2(111) easily adsorbs oxygen with the oxygen adsorption energy of only -0.68 eV. This work provides insights into the synergetic effect of Mn-doped ceria for facilitating oxygen adsorption and enhancing ORR performance.
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Affiliation(s)
- Zhourong Xiao
- State Key Laboratory of Metastable Materials Science and Technology (MMST), Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, P. R. China
| | - Fang Hou
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Xiangwen Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
| | - Lun Pan
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
| | - Ji-Jun Zou
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
| | - Guozhu Li
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
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Liao W, Lyu L, Wang D, Hu C, Li T. Graphitized Cu-β-cyclodextrin polymer driving an efficient dual-reaction-center Fenton-like process by utilizing electrons of pollutants for water purification. J Environ Sci (China) 2023; 126:565-574. [PMID: 36503782 DOI: 10.1016/j.jes.2022.05.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 05/13/2022] [Accepted: 05/13/2022] [Indexed: 06/17/2023]
Abstract
Excessive consumption of energy and resources is a major challenge in wastewater treatment. Here, a novel heterogeneous Fenton-like catalyst consisting of Cu-doped graphene-like catalysts (Cu-GCD NSs) was first synthesized by an enhanced carbothermal reduction of β-cyclodextrin (β-CD). The catalyst exhibits excellent Fenton-like catalytic activity for the degradation of various pollutants under neutral conditions, accompanied by low H2O2 consumption. The results of structural characterization and theoretical calculations confirmed that the dual reaction centers (DRCs) were constructed on Cu-GCD NSs surface through C-O-Cu bonds supported on zero-valent copper species, which play a significant role in the high-performance Fenton-like reaction. The pollutants that served as electron donors were decomposed in the electron-poor carbon centers, whereas H2O2 and dissolved oxygen obtained these electrons in the electron-rich Cu centers through C-O-Cu bonds, thereby producing more active species. This study demonstrates that the electrons of pollutants can be efficiently utilized in Fenton-like reactions by DRCs on the catalyst surface, which provides an effective strategy to improve Fenton-like reactivity and reduce H2O2 consumption.
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Affiliation(s)
- Weixiang Liao
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China
| | - Lai Lyu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China
| | - Di Wang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China
| | - Chun Hu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China
| | - Tong Li
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China; School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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Mithun Prakash R, Ningaraju C, Gayathri K, Teja Y, Aslam Manthrammel M, Shkir M, AlFaify S, Sakar M. One-step solution auto-combustion process for the rapid synthesis of crystalline phase iron oxide nanoparticles with improved magnetic and photocatalytic properties. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103435] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Wu Y, Li M, Ma L, Lu M, Zhang H, Qi M. Activating bimetallic ZIF-derived polymers using facile steam-etching for the ORR. NEW J CHEM 2022. [DOI: 10.1039/d2nj02425j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An α-Fe2O3/Fe@NPC catalyst for the ORR is synthesized via a thermal shock reaction with precursors 1 and 2.
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Affiliation(s)
- Yanling Wu
- School of Transportation and Civil Engineering, Shandong Jiaotong University, Ji'nan 250357, China
- National United Engineering Laboratory for Biomedical Material Modification, Dezhou 251100, China
| | - Miantuo Li
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Liping Ma
- School of Transportation and Civil Engineering, Shandong Jiaotong University, Ji'nan 250357, China
| | - Minghui Lu
- School of Transportation and Civil Engineering, Shandong Jiaotong University, Ji'nan 250357, China
| | - Haijun Zhang
- Department of Vascular & Intervention, Tenth Peoples’ Hospital of Tongji University, Shanghai 200072, China
| | - Meili Qi
- School of Transportation and Civil Engineering, Shandong Jiaotong University, Ji'nan 250357, China
- National United Engineering Laboratory for Biomedical Material Modification, Dezhou 251100, China
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Pang Y, Mo Z, Wang H, Linkov V, Wang X, Wang R. A post-synthesis surface reconstructed carbon aerogel as an enhanced oxygen reduction reaction catalyst for zinc–air batteries. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01130d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
After calcination and erosion, aerogel carbon materials have been subjected to surface reconstruction under the action of carbon fixation by iron at high temperature, resulting the change of specific surface area and ratio of surface species.
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Affiliation(s)
- Yanhua Pang
- State Key Laboratory Base for Eco-Chemical Engineering
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Zaiyong Mo
- Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology
- School of Chemistry and Food Science
- Yulin Normal University
- Yulin 537000
- PR China
| | - Hui Wang
- State Key Laboratory Base for Eco-Chemical Engineering
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Vladimir Linkov
- South African Institute for Advanced Materials Chemistry
- University of the Western Cape
- Cape Town
- South Africa
| | - Xuyun Wang
- State Key Laboratory Base for Eco-Chemical Engineering
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Rongfang Wang
- State Key Laboratory Base for Eco-Chemical Engineering
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
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