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Gao J, Wu X, Teng X, Zhang K, Zhao H, Li J, Zhang J. Thermal-Driven Orderly Assembly of Ir-atomic Chains on α-MnO 2 with Enhanced Performance for Acidic Oxygen Evolution. Chempluschem 2024; 89:e202300680. [PMID: 38263338 DOI: 10.1002/cplu.202300680] [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: 11/22/2023] [Revised: 01/11/2024] [Accepted: 01/22/2024] [Indexed: 01/25/2024]
Abstract
The development of acid-stable oxygen evolution reaction electrocatalysts is essential for high-performance acidic water electrolysis. Herein, we report the results of one-dimensional (1D) nanorods (NRs) IrCeMnO@Ir containing ~20 wt . % Iridium (Ir) as an efficient anode electrocatalyst, synthesized via a one-step cation exchange strategy. Owing to the presence of 1D channels of the nanorod architecture and the unique electronic structure, the IrCeMnO@Ir exhibited 69 folds more mass activity than that of commercial IrO2 as well as over 400 h stability with only a 20 mV increase in overpotential. DFT calculations and control experiments demonstrated that CeO2 serves as an electron buffer to accelerate the kinetics of the rate-determined step for the significantly enhanced activity and suppress the over-oxidation of Ir species as well as their dissolution for impressively promoted stability under practical conditions. Our work opens up a feasible strategy to boost OER activity and stability simultaneously.
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Affiliation(s)
- Junan Gao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Xiaokuan Wu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Xin Teng
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Kuo Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Hong Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Jianwei Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Jie Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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Shao X, Ma C, Zhu L, Zou C, Cao L, Yang J. Optimized Mo-doped IrO x anode for efficient degradation of refractory sulfadiazine. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:89156-89167. [PMID: 35849232 DOI: 10.1007/s11356-022-22033-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
Electrochemical advanced oxidation processes (EAOPs) is considered to be an efficacious method to degrade antibiotics. However, the performance of the anode has become the main limiting factor of this technology. In this study, due to the electron-deficient characteristics and the improvement of OER performance of Mo, we chose to use thermal decomposition to incorporate Mo into IrO2 to prepare anodes with industrial applicability. Under the optimal ratio of Ir to Mo is 7:3, (Ir0.7Mo0.3)Ox electrode's particular pore structure can expose more active sites and create a channel for the transportation of electrons, thereby promoting the formation of free radicals and degrading pollutants more efficiently. (Ir0.7Mo0.3)Ox electrode also has a higher mass activity (6.332 A g-1, three times that of the IrO2 electrode) and a larger electrochemical active area (ECSA, 375.43 cm2, seven times that of the IrO2 electrode). In addition, the optimal conditions of (Ir0.7Mo0.3)Ox electrode for degrading sulfadiazine(SDZ) were explored, which achieved a higher removal than traditional electrodes (90% removal within 4 h) when the Ti plate was the substrate. Through the intermediate products of SDZ degradation and related literatures, two possible degradation pathways of SDZ were speculated. This research provides a new type of anode catalyst for the degradation of sulfonamide antibiotics, which is possible for industrial application.
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Affiliation(s)
- Xiang Shao
- School of Resources and Environmental Engineering, Environmental Protection Key Laboratory of Environmental Risk, East China University of Science and Technology, 130 Mei long Road, Shanghai, 200237, People's Republic of China
| | - Chenglong Ma
- School of Resources and Environmental Engineering, Environmental Protection Key Laboratory of Environmental Risk, East China University of Science and Technology, 130 Mei long Road, Shanghai, 200237, People's Republic of China
| | - Lin Zhu
- School of Resources and Environmental Engineering, Environmental Protection Key Laboratory of Environmental Risk, East China University of Science and Technology, 130 Mei long Road, Shanghai, 200237, People's Republic of China
| | - Chongjie Zou
- School of Resources and Environmental Engineering, Environmental Protection Key Laboratory of Environmental Risk, East China University of Science and Technology, 130 Mei long Road, Shanghai, 200237, People's Republic of China
| | - Limei Cao
- School of Resources and Environmental Engineering, Environmental Protection Key Laboratory of Environmental Risk, East China University of Science and Technology, 130 Mei long Road, Shanghai, 200237, People's Republic of China
| | - Ji Yang
- School of Resources and Environmental Engineering, Environmental Protection Key Laboratory of Environmental Risk, East China University of Science and Technology, 130 Mei long Road, Shanghai, 200237, People's Republic of China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People's Republic of China.
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