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Wang P, Wang X, Zhang J, Wu C, Zhang A, Chen N, Sheng T, Wu Z. Modulating the Active Sites of VS 2 by Mn Doping for Highly Selective CO 2 Electroreduction to Methanol in a Flow Cell. ACS APPLIED MATERIALS & INTERFACES 2024; 16:36453-36461. [PMID: 38950003 DOI: 10.1021/acsami.4c06789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Methanol is a valuable liquid C1 product in CO2 electroreduction (CO2ER); however, it is hard to achieve high selectivity and a large current density simultaneously. In this work, we construct Mn2+-doped VS2 multilayer nanowafers applied in a flow cell to yield methanol as a single liquid product to tackle this challenge. Mn doping adjusts the electronic structure of VS2 and concurrently introduces sulfur vacancies, forming a critical *COB intermediate and facilitating its sequential hydrogenation to methanol. The optimal Mn4.8%-VS2 exhibits methanol Faradic efficiencies of more than 60% over a wide potential range of -0.4 to -0.8 V in a flow cell, of which the maximal value is 72.5 ± 1.1% at -0.6 V along with a partial current density of 74.3 ± 1.1 mA cm-2. This work opens an avenue to rationally design catalysts for engineering C1 intermediates toward CO2ER to a single liquid methanol in a flow cell.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Xiangyu Wang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Jingqi Zhang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Chunhua Wu
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Aiya Zhang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Nannan Chen
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Tian Sheng
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Zhengcui Wu
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China
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Hua Z, Qi K, Mi Y, Zhao Y, Wu X, Guo W, Wan X, Fan Z, Yang D. Crystalline CdS/Amorphous Cd(OH) 2 Composite for Electrochemical CO 2 Reduction to CO in a Wide Potential Window. Chemistry 2024; 30:e202400983. [PMID: 38747632 DOI: 10.1002/chem.202400983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Indexed: 05/31/2024]
Abstract
Electrochemical CO2 reduction is a promising method for converting atmospheric CO2 into valuable low-carbon chemicals. In this study, a crystalline cadmium sulfide/amorphous cadmium hydroxide composite was successfully deposited on the carbon paper substrate surface by in-situ chemical bath deposition (named as c-CdS/a-Cd(OH)2/CP electrodes) for the efficient electrochemical CO2 reduction to produce CO. The c-CdS/a-Cd(OH)2/CP electrode exhibited high CO Faradaic efficiencies (>90 %) under a wide potential window of 1.0 V, with the highest value reaching ~100 % at the applied potential ranging from -2.16 V to -2.46 V vs. ferrocene/ferrocenium (Fc/Fc+), superior to the crystalline counterpart c-CdS/CP and c-CdS/c-Cd(OH)2@CP electrodes. Meanwhile, the CO partial current density reached up to 154.7 mA cm-2 at -2.76 V vs. Fc/Fc+ on the c-CdS/a-Cd(OH)2/CP electrode. The excellent performance of this electrode was mainly ascribed to its special three-dimensional structure and the introduction of a-Cd(OH)2. These structures could provide more active sites, accelerate the charge transfer, and enhance adsorption of *COOH intermediates, thereby improving the CO selectivity. Moreover, the electrolytes consisting of 1-butyl-3-methylimidazolium tetrafluoroborate and acetonitrile also enhanced the reaction kinetics of electrochemical CO2 reduction to CO.
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Affiliation(s)
- Zhixin Hua
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Kongsheng Qi
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Yulan Mi
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Yuhua Zhao
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Xinjie Wu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Weiwei Guo
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong, 266071, China
| | - Xiaoqi Wan
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Zixi Fan
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, Henan, 450053, China
| | - Dexin Yang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
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Liu Z, Han X, Liu J, Chen S, Deng S, Wang J. In Situ Reconstruction of Scalable Amorphous Indium-Based Metal-Organic Framework for CO 2 Electroreduction to Formate over an Ultrawide Potential Window. ACS APPLIED MATERIALS & INTERFACES 2024; 16:28655-28663. [PMID: 38776450 DOI: 10.1021/acsami.4c04437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Amorphous metal-organic frameworks (aMOFs) are highly attractive for electrocatalytic applications due to their exceptional conductivity and abundant defect sites, but harsh preparation conditions of "top-down" strategy have hindered their widespread use. Herein, the scalable production of aMIL-68(In)-NH2 was successfully achieved through a facile "bottom-up" strategy involving ligand competition with 2-methylimidazole. Multiple in situ and ex situ characterizations reveal that aMIL-68(In)-NH2 evolutes into In/In2O3-x as the genuine active sites during the CO2 electrocatalytic reduction (CO2RR) process. Moreover, the retained amino groups could enhance the CO2 adsorption. As expected, the reconstructed catalyst demonstrates high formate Faradaic efficiency values (>90%) over a wide potential range of 800 mV in a flow cell, surpassing most top-ranking electrocatalysts. Density functional theory calculations reveal that the abundant oxygen vacancies in aMIL-68(In)-NH2 induce more local charges around electroactive sites, thereby promoting the formation of HCOO* intermediates. Furthermore, 16 g of samples can be readily prepared in one batch and exhibit almost identical CO2RR performances. This work offers a feasible batch-scale strategy to design amorphous MOFs for the highly efficient electrolytic CO2RR.
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Affiliation(s)
- Ziyun Liu
- School of Resources & Environment, Nanchang University, Nanchang 330031, People's Republic of China
| | - Xinxin Han
- School of Resources & Environment, Nanchang University, Nanchang 330031, People's Republic of China
| | - Junhui Liu
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shixia Chen
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shuguang Deng
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States of America
| | - Jun Wang
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
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Huang X, Han X, Tang R, Wu H, Chen S, Chen J, Zeng Z, Deng S, Wang J. Anion-Mediated In Situ Reconstruction of the Bi 2MoO 6 Precatalyst for Enhanced Electrochemical CO 2 Reduction over a Wide Potential Window. ACS APPLIED MATERIALS & INTERFACES 2024; 16:742-751. [PMID: 38110327 DOI: 10.1021/acsami.3c14930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Electrochemical CO2 reduction reaction (eCO2RR) is a viable approach to achieve carbon neutrality. Bismuth-based electrocatalysts demonstrate exceptional selectivity in CO2-to-formate conversion, but their reconstruction mechanisms during the eCO2RR remain elusive. Herein, the reconstruction processes of bismuth molybdate (Bi2MoO6) nanoplates are elucidated during the eCO2RR. Operando and ex situ measurements reveal the in situ partial reduction of Bi2MoO6 to Bi metal, forming Bi@Bi2MoO6 at negative potentials. Meanwhile, CO32- ions in the electrolyte spontaneously exchange with MoO42- in Bi2MoO6. The obtained Bi@Bi2MoO6/Bi2O2CO3 delivers a formate Faradaic efficiency (FE) of 95.2% at -1.0 V. Notably, high formate FEs (>90%) are maintained within a wide 500 mV window. Although computational calculations indicate a higher energy barrier for *OCHO formation on Bi2O2CO3, the prevention of excessive reduction to metal Bi significantly enhances long-term stability. Furthermore, the CO32- ion exchange process occurs in various 2D Bi-containing precatalysts, which should be emphasized in further studies.
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Affiliation(s)
- Xin Huang
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Xinxin Han
- School of Resources & Environment, Nanchang University, Nanchang 330031, People's Republic of China
| | - Rujia Tang
- School of Resources & Environment, Nanchang University, Nanchang 330031, People's Republic of China
| | - Hongtao Wu
- School of Future Technology, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shixia Chen
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Jingwen Chen
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Zheling Zeng
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shuguang Deng
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Jun Wang
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
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