1
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de Almeida JC, Lopes OF, Shviro M, da Silva GTST, Ribeiro C, de Mendonça VR. Exploring the stability and catalytic activity of monoethanolamine functionalized CuO electrode in electrochemical CO 2 reduction. NANOSCALE 2024; 16:18455-18467. [PMID: 39263832 DOI: 10.1039/d4nr01919a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Electrochemical carbon dioxide reduction reactions (eCO2RR) have emerged as promising strategies for both mitigating CO2 emissions and converting them into valuable products. Despite the promise, challenges such as stability, efficiency, and availability of CO2 on the electrode surface, especially at high current densities, still need to be overcome. Herein, this study explores the precipitation of CuO nanoparticles with monoethanolamine to preserve nitrogen groups on the surface of the material. These groups can act by adsorbing the CO2 and stabilizing its catalytic performance during the electroreduction procedure. The incorporation of monoethanolamine as functionalization on the surface of the CuO catalyst was confirmed by XPS measurements. Electrodes utilizing the S-MEA catalyst demonstrated enhanced electrochemical activity, achieving a current density of -187 mA cm-2 at a half-cell potential of -1.2 V versus RHE. Furthermore, long-term stability tests confirmed consistent activity for at least 100 hours in both flow cell and zero gap cell configurations. These results indicate that electrodes featuring the S-MEA catalyst display notably superior electrochemical activity and stability compared with the non-functionalized CuO (S-KOH) and commercial CuO nanopowder (c-CuO). The S-MEA enhancement is attributed to the introduction of amine functional groups that serve as CO2 adducts, facilitating CO2 adsorption and fostering electrode activation. It was evidenced by higher current densities and improved structural integrity during prolonged tests. The insights gained from the comparative performance of these electrodes provide valuable directions for future research in developing more robust and efficient catalysts for environmental remediation technologies.
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Affiliation(s)
- Jéssica C de Almeida
- Federal University of São Carlos, Science and Technology Center for Sustainability, 18052-780, Sorocaba, SP, Brazil.
| | - Osmando F Lopes
- Laboratory of Photochemistry and Materials Science, Institute of Chemistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Meital Shviro
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research: Electrochemical Process Engineering (IEK-14), 52425 Jülich, Germany
| | - Gelson T S T da Silva
- Interdisciplinary Laboratory of Electrochemistry and Ceramics, Department of Chemistry, Federal University of Sao Carlos, São Carlos, São Paulo, 13565-905, Brazil
| | - Caue Ribeiro
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, 13561-206, São Carlos, SP, Brazil.
| | - Vagner R de Mendonça
- Federal University of São Carlos, Science and Technology Center for Sustainability, 18052-780, Sorocaba, SP, Brazil.
- Federal Institute of Education, Science, and Technology of São Paulo - IFSP Campus Itapetininga, 18202-000, Itapetininga, SP, Brazil
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2
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Zhang X, Sun H, Wang YR, Shi Z, Zhong RL, Sun CY, Liu JY, Su ZM, Lan YQ. Dynamic Control of Asymmetric Charge Distribution for Electrocatalytic Urea Synthesis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2408510. [PMID: 39155823 DOI: 10.1002/adma.202408510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Revised: 07/22/2024] [Indexed: 08/20/2024]
Abstract
Constructing dual catalytic sites with charge density differences is an efficient way to promote urea electrosynthesis from parallelNO 3 - ${\mathrm{NO}}_3^ - $ and CO2 reduction yet still challenging in static system. Herein, a dynamic system is constructed by precisely controlling the asymmetric charge density distribution in an Au-doped coplanar Cu7 clusters-based 3D framework catalyst (Au@cpCu7CF). In Au@cpCu7CF, the redistributed charge between Au and Cu atoms changed periodically with the application of pulse potentials switching between -0.2 and -0.6 V and greatly facilitated the electrosynthesis of urea. Compared with the static condition of pristine cpCu7CF (FEurea = 5.10%), the FEurea of Au@cpCu7CF under pulsed potentials is up to 55.53%. Theoretical calculations demonstrated that the high potential of -0.6 V improved the adsorption of *HNO2 and *NH2 on Au atoms and inhibited the reaction pathways of by-products. While at the low potential of -0.2 V, the charge distribution between Au and Cu atomic sites facilitated the thermodynamic C-N coupling step. This work demonstrated the important role of asymmetric charge distribution under dynamic regulation for urea electrosynthesis, providing a new inspiration for precise control of electrocatalysis.
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Affiliation(s)
- Xin Zhang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, Jilin, 130024, P. R. China
| | - Hao Sun
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, Jilin, 130024, P. R. China
| | - Yi-Rong Wang
- Guangdong Provincial Key Laboratory of Carbon Dioxide Resource Utilization School of Chemistry, South China Normal University, Guangzhou, 510006, P. R. China
| | - Zhan Shi
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, Jilin, 130024, P. R. China
| | - Rong-Lin Zhong
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, Jilin, 130024, P. R. China
| | - Chun-Yi Sun
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, P. R. China
| | - Jing-Yao Liu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, Jilin, 130024, P. R. China
| | - Zhong-Min Su
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, Jilin, 130024, P. R. China
| | - Ya-Qian Lan
- Guangdong Provincial Key Laboratory of Carbon Dioxide Resource Utilization School of Chemistry, South China Normal University, Guangzhou, 510006, P. R. China
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3
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Sun M, Cheng J, Anzai A, Kobayashi H, Yamauchi M. Modulating Electronic States of Cu in Metal-Organic Frameworks for Emerging Controllable CH 4/C 2H 4 Selectivity in CO 2 Electroreduction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2404931. [PMID: 38976515 PMCID: PMC11425631 DOI: 10.1002/advs.202404931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 06/03/2024] [Indexed: 07/10/2024]
Abstract
The intensive study of electrochemical CO2 reduction reaction (CO2RR) has resulted in numerous highly selective catalysts, however, most of these still exhibit uncontrollable selectivity. Here, it is reported for the first time the controllable CH4/C2H4 selectivity by modulating the electronic states of Cu incorporated in metal-organic frameworks with different functional ligands, achieving a Faradaic efficiency of 58% for CH4 on Cu-incorporated UiO-66-H (Ce) composite catalysts, Cu/UiO-66-H (Ce) and that of 44% for C2H4 on Cu/UiO-66-F (Ce). In situ measurements of Raman and X-ray absorption spectra revealed that the electron-withdrawing ability of the ligand side group controls the product selectivity on MOFs through the modulation of the electronic states of Cu. This work opens new prospects for the development of MOFs as a platform for the tailored tuning of selectivity in CO2RR.
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Affiliation(s)
- Mingxu Sun
- Institute for Materials Chemistry and Engineering (IMCE)Kyushu UniversityMotooka 744, Nishi‐kuFukuoka819‐0395Japan
| | - Jiamin Cheng
- Institute for Materials Chemistry and Engineering (IMCE)Kyushu UniversityMotooka 744, Nishi‐kuFukuoka819‐0395Japan
- Research Center for Negative Emissions Technologies (K‐NETs)Kyushu UniversityMotooka 744, Nishi‐kuFukuoka819‐0395Japan
| | - Akihiko Anzai
- Institute for Materials Chemistry and Engineering (IMCE)Kyushu UniversityMotooka 744, Nishi‐kuFukuoka819‐0395Japan
| | - Hirokazu Kobayashi
- Research Center for Negative Emissions Technologies (K‐NETs)Kyushu UniversityMotooka 744, Nishi‐kuFukuoka819‐0395Japan
| | - Miho Yamauchi
- Institute for Materials Chemistry and Engineering (IMCE)Kyushu UniversityMotooka 744, Nishi‐kuFukuoka819‐0395Japan
- Research Center for Negative Emissions Technologies (K‐NETs)Kyushu UniversityMotooka 744, Nishi‐kuFukuoka819‐0395Japan
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER)Kyushu UniversityMotooka 744, Nishi‐kuFukuoka819‐0395Japan
- Advanced Institute for Materials Research (WPI‐AIMR)Tohoku University2‐1‐1 Katahira, Aoba‐kuSendai980–8577Japan
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4
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Li Z, Wang L, Sun L, Yang W. Dynamic Cation Enrichment during Pulsed CO 2 Electrolysis and the Cation-Promoted Multicarbon Formation. J Am Chem Soc 2024; 146:23901-23908. [PMID: 39054919 DOI: 10.1021/jacs.4c06404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
Recently, pulsed electrolysis has been demonstrated as an emerging electrochemical technique that significantly promotes the performance of various electrocatalysis applications. The ionic nature of aqueous electrolytes implies a likely change in ionic distribution under these alternating potential conditions. However, despite the well-known importance of cations, the impact of pulsed electrolysis on the cation distribution remains unexplored as well as its influences on the performance. Herein, we explore the cation effects on the pulsed electrochemical CO2 reduction (p-CO2RR) using the most widely utilized alkali metal cations, including Li+, Na+, K+, and Cs+. It is discovered that the nature of cations can significantly influence the product ratio of C2+ over C1 (mostly CH4) during p-CO2RR in an order of Li+< Na+< K+< Cs+, much more profoundly than those of static cases. We report direct experimental evidence for the cation enrichment caused by pulsed electrolysis, depending on the radius of the hydrated ions. With further quasi-in situ analysis of the catalyst surface, the cation-promoted Cu dissolution-and-redeposition process was identified; this is found to alter the surface CuxO/Cu ratio during the pulsed process. We demonstrate that both the cation enrichment and the cation-adjusted surface CuxO/Cu composition impact the C2+/C1 ratio through the control of the surface-adsorbed CO population. These results reveal the presence of pulse-induced cation redistribution in emerging pulsed electrolysis techniques and provide a comprehensive understanding of alkali metal cation effects for improving the selectivity of p-CO2RR.
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Affiliation(s)
- Zhuofeng Li
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, Zhejiang, China
| | - Linqin Wang
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, Zhejiang, China
| | - Licheng Sun
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, Zhejiang, China
| | - Wenxing Yang
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, Zhejiang, China
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5
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Heßelmann M, Felder D, Plischka W, Nabi S, Linkhorst J, Wessling M, Keller R. Dynamics of the Boundary Layer in Pulsed CO 2 Electrolysis. Angew Chem Int Ed Engl 2024; 63:e202406924. [PMID: 38884252 DOI: 10.1002/anie.202406924] [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: 04/11/2024] [Revised: 06/05/2024] [Accepted: 06/06/2024] [Indexed: 06/18/2024]
Abstract
Electrochemical reduction of CO2 poses a vast potential to contribute to a defossilized industry. Despite tremendous developments within the field, mass transport limitations, carbonate salt formation, and electrode degradation mechanisms still hamper the process performance. One promising approach to tweak CO2 electrolysis beyond today's limitations is pulsed electrolysis with potential cycling between an operating and a regeneration mode. Here, we rigorously model the boundary layer at a silver electrode in pulsed operation to get profound insights into the dynamic reorganization of the electrode microenvironment. In our simulation, pulsed electrolysis leads to a significant improvement of up to six times higher CO current density and 20 times higher cathodic energy efficiency when pulsing between -1.85 and -1.05 V vs SHE compared to constant potential operation. We found that elevated reactant availability in pulsed electrolysis originates from alternating replenishment of CO2 by diffusion and not from pH-induced carbonate and bicarbonate conversion. Moreover, pulsed electrolysis substantially promotes carbonate removal from the electrode by up to 83 % compared to constant potential operation, thus reducing the risk of salt formation. Therefore, this model lays the groundwork for an accurate simulation of the dynamic boundary layer modulation, which can provide insights into manifold electrochemical conversions.
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Affiliation(s)
- Matthias Heßelmann
- Chemical Process Engineering AVT.CVT, RWTH Aachen University, Forckenbeckstraße 51, 52074, Aachen, Germany
| | - Daniel Felder
- Chemical Process Engineering AVT.CVT, RWTH Aachen University, Forckenbeckstraße 51, 52074, Aachen, Germany
- DWI-Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Wenzel Plischka
- Chemical Process Engineering AVT.CVT, RWTH Aachen University, Forckenbeckstraße 51, 52074, Aachen, Germany
| | - Sajad Nabi
- Chemical Process Engineering AVT.CVT, RWTH Aachen University, Forckenbeckstraße 51, 52074, Aachen, Germany
| | - John Linkhorst
- Chemical Process Engineering AVT.CVT, RWTH Aachen University, Forckenbeckstraße 51, 52074, Aachen, Germany
| | - Matthias Wessling
- Chemical Process Engineering AVT.CVT, RWTH Aachen University, Forckenbeckstraße 51, 52074, Aachen, Germany
- DWI-Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Robert Keller
- Chemical Process Engineering AVT.CVT, RWTH Aachen University, Forckenbeckstraße 51, 52074, Aachen, Germany
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6
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Liu X, Long J, Fu Y, Wu L, Chen H, Xie X, Wang Z, Wu J, Xiang K, Liu H. Electric Field Generated at the Millisecond Pulse-Polarized Interface Facilitates the Electrolytic Conversion of SO 2 into H 2S. ACS APPLIED MATERIALS & INTERFACES 2024; 16:37298-37307. [PMID: 38970147 DOI: 10.1021/acsami.4c07431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/07/2024]
Abstract
Interfacial electric field holds significant importance in determining both the polar molecular configuration and surface coverage during electrocatalysis. This study introduces a methodology leveraging the varying electric dipole moment of SO2 under distinct interfacial electric field strengths to enhance the selectivity of the SO2 electroreduction process. This approach presented the first attempt to utilize pulsed voltage application to the Au/PTFE membrane electrode for the control of the molecular configuration and coverage of SO2 on the electrode surface. Remarkably, the modulation of pulse duration resulted in a substantial inhibition of the hydrogen evolution reaction (HER) (FEH2 < 3%) under millisecond pulse conditions (ta = 10 ms, tc = 300 ms, Ea = -0.8 V (vs Hg/Hg2SO4), Ec = -1.8 V (vs Hg/Hg2SO4)), concomitant with a noteworthy enhancement in H2S selectivity (FEH2S > 97%). A comprehensive analysis, incorporating in situ Raman spectroscopy, electrochemical quartz crystal microbalance, COMSOL simulations, and DFT calculations, corroborated the increased selectivity of H2S products was primarily associated with the inherently large dipole moment of the SO2 molecule. The enhancement of the interfacial electric field induced by millisecond pulses was instrumental in amplifying SO2 coverage, activating SO2, facilitating the formation of the pivotal intermediate product *SOH, and effectively reducing the reaction energy barrier in the SO2 reduction process. These findings provide novel insights into the influences of ion and molecular transport dynamics, as well as the temporal intricacies of competitive pathways during the SO2 electroreduction process. Moreover, it underscores the intrinsic correlation between the electric dipole moment and surface-molecule interaction of the catalyst.
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Affiliation(s)
- Xudong Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Jiaqi Long
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Yingxue Fu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Lin Wu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hao Chen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Zhujiang Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Jun Wu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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7
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Zhang J, Xia S, Wang Y, Wu J, Wu Y. Recent advances in dynamic reconstruction of electrocatalysts for carbon dioxide reduction. iScience 2024; 27:110005. [PMID: 38846002 PMCID: PMC11154216 DOI: 10.1016/j.isci.2024.110005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2024] Open
Abstract
Electrocatalysts undergo structural evolution under operating electrochemical CO2 reduction reaction (CO2RR) conditions. This dynamic reconstruction correlates with variations in CO2RR activity, selectivity, and stability, posing challenges in catalyst design for electrochemical CO2RR. Despite increased research on the reconstruction behavior of CO2RR electrocatalysts, a comprehensive understanding of their dynamic structural evolution under reaction conditions is lacking. This review summarizes recent developments in the dynamic reconstruction of catalysts during the CO2RR process, covering fundamental principles, modulation strategies, and in situ/operando characterizations. It aims to enhance understanding of electrocatalyst dynamic reconstruction, offering guidelines for the rational design of CO2RR electrocatalysts.
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Affiliation(s)
- Jianfang Zhang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Shuai Xia
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Yan Wang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
- Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory), Hefei 230009, China
| | - Jingjie Wu
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Yucheng Wu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China
- China International S&T Cooperation Base for Advanced Energy and Environmental Materials & Anhui Provincial International S&T Cooperation Base for Advanced Energy Materials, Hefei University of Technology, Hefei 230009, China
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8
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Lu X, Zhou C, Delima RS, Lees EW, Soni A, Dvorak DJ, Ren S, Ji T, Bahi A, Ko F, Berlinguette CP. Visualization of CO 2 electrolysis using optical coherence tomography. Nat Chem 2024; 16:979-987. [PMID: 38429344 DOI: 10.1038/s41557-024-01465-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 01/29/2024] [Indexed: 03/03/2024]
Abstract
Electrolysers offer an appealing technology for conversion of CO2 into high-value chemicals. However, there are few tools available to track the reactions that occur within electrolysers. Here we report an electrolysis optical coherence tomography platform to visualize the chemical reactions occurring in a CO2 electrolyser. This platform was designed to capture three-dimensional images and videos at high spatial and temporal resolutions. We recorded 12 h of footage of an electrolyser containing a porous electrode separated by a membrane, converting a continuous feed of liquid KHCO3 to reduce CO2 into CO at applied current densities of 50-800 mA cm-2. This platform visualized reactants, intermediates and products, and captured the strikingly dynamic movement of the cathode and membrane components during electrolysis. It also linked CO production to regions of the electrolyser in which CO2 was in direct contact with both membrane and catalyst layers. These results highlight how this platform can be used to track reactions in continuous flow electrochemical reactors.
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Affiliation(s)
- Xin Lu
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Chris Zhou
- Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
- Department of Materials Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
- Stewart Blusson Quantum Matter Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Roxanna S Delima
- Stewart Blusson Quantum Matter Institute, The University of British Columbia, Vancouver, British Columbia, Canada
- Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Eric W Lees
- Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Abhishek Soni
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada
| | - David J Dvorak
- Stewart Blusson Quantum Matter Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Shaoxuan Ren
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Tengxiao Ji
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Addie Bahi
- Stewart Blusson Quantum Matter Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Frank Ko
- Department of Materials Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
- Stewart Blusson Quantum Matter Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Curtis P Berlinguette
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada.
- Stewart Blusson Quantum Matter Institute, The University of British Columbia, Vancouver, British Columbia, Canada.
- Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, British Columbia, Canada.
- Canadian Institute for Advanced Research, Toronto, Ontario, Canada.
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9
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Herzog A, Lopez Luna M, Jeon HS, Rettenmaier C, Grosse P, Bergmann A, Roldan Cuenya B. Operando Raman spectroscopy uncovers hydroxide and CO species enhance ethanol selectivity during pulsed CO 2 electroreduction. Nat Commun 2024; 15:3986. [PMID: 38734726 PMCID: PMC11088695 DOI: 10.1038/s41467-024-48052-3] [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: 09/25/2023] [Accepted: 04/16/2024] [Indexed: 05/13/2024] Open
Abstract
Pulsed CO2 electroreduction (CO2RR) has recently emerged as a facile way to in situ tune the product selectivity, in particular toward ethanol, without re-designing the catalytic system. However, in-depth mechanistic understanding requires comprehensive operando time-resolved studies to identify the kinetics and dynamics of the electrocatalytic interface. Here, we track the adsorbates and the catalyst state of pre-reduced Cu2O nanocubes ( ~ 30 nm) during pulsed CO2RR using sub-second time-resolved operando Raman spectroscopy. By screening a variety of product-steering pulse length conditions, we unravel the critical role of co-adsorbed OH and CO on the Cu surface next to the oxidative formation of Cu-Oad or CuOx/(OH)y species, impacting the kinetics of CO adsorption and boosting the ethanol selectivity. However, a too low OHad coverage following the formation of bulk-like Cu2O induces a significant increase in the C1 selectivity, while a too high OHad coverage poisons the surface for C-C coupling. Thus, we unveil the importance of co-adsorbed OH on the alcohol formation under CO2RR conditions and thereby, pave the way for improved catalyst design and operating conditions.
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Affiliation(s)
- Antonia Herzog
- Department of Interface Science, Fritz Haber Institute of the Max-Planck Society, 14195, Berlin, Germany
- Massachusetts Institute of Technology, Research Laboratory of Electronics, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
| | - Mauricio Lopez Luna
- Department of Interface Science, Fritz Haber Institute of the Max-Planck Society, 14195, Berlin, Germany
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Hyo Sang Jeon
- Department of Interface Science, Fritz Haber Institute of the Max-Planck Society, 14195, Berlin, Germany
- Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Wolgok 2(i)-dong, Seongbuk-gu, Seoul, South Korea
| | - Clara Rettenmaier
- Department of Interface Science, Fritz Haber Institute of the Max-Planck Society, 14195, Berlin, Germany
| | - Philipp Grosse
- Department of Interface Science, Fritz Haber Institute of the Max-Planck Society, 14195, Berlin, Germany
| | - Arno Bergmann
- Department of Interface Science, Fritz Haber Institute of the Max-Planck Society, 14195, Berlin, Germany.
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz Haber Institute of the Max-Planck Society, 14195, Berlin, Germany.
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10
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Lee H, Ren H. Tuning Electrocatalytic Oxygen Reduction Reaction with Dynamic Control of Electrochemical Interfaces. J Am Chem Soc 2024. [PMID: 38607685 DOI: 10.1021/jacs.3c13694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2024]
Abstract
Herein, we report the tuning of the activity and selectivity of the oxygen reduction reaction (ORR) through the dynamic regulation of the electrochemical interfaces to surpass the performance of conventional electrocatalysis. This is achieved by applying an oscillating potential between the ORR operating potential and anion adsorbing potential on a gold electrode. Oscillating potential enhances the selectivity for H2O2 by up to 1.35 times compared to the static potential, as confirmed by rotating ring-disk electrode and fluorescence assay measurements. We showed that the enhanced selectivity depends on dynamic adsorption and desorption of anions, and the enhancement occurs in the millisecond time scale or shorter. The transient selectivity to H2O2 can reach ∼97% within the first 5 ms after potential switching. Our results suggest that the dynamic interface can create a transient but unique microenvironment for new reactivity that cannot be reproduced under static conditions, which offers a new dimension in controlling electrocatalysis.
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Affiliation(s)
- Hyein Lee
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Hang Ren
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
- Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
- Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States
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11
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Yang F, Jiang S, Liu S, Beyer P, Mebs S, Haumann M, Roth C, Dau H. Dynamics of bulk and surface oxide evolution in copper foams for electrochemical CO 2 reduction. Commun Chem 2024; 7:66. [PMID: 38548895 PMCID: PMC10978924 DOI: 10.1038/s42004-024-01151-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 03/14/2024] [Indexed: 04/01/2024] Open
Abstract
Oxide-derived copper (OD-Cu) materials exhibit extraordinary catalytic activities in the electrochemical carbon dioxide reduction reaction (CO2RR), which likely relates to non-metallic material constituents formed in transitions between the oxidized and the reduced material. In time-resolved operando experiment, we track the structural dynamics of copper oxide reduction and its re-formation separately in the bulk of the catalyst material and at its surface using X-ray absorption spectroscopy and surface-enhanced Raman spectroscopy. Surface-species transformations progress within seconds whereas the subsurface (bulk) processes unfold within minutes. Evidence is presented that electroreduction of OD-Cu foams results in kinetic trapping of subsurface (bulk) oxide species, especially for cycling between strongly oxidizing and reducing potentials. Specific reduction-oxidation protocols may optimize formation of bulk-oxide species and thereby catalytic properties. Together with the Raman-detected surface-adsorbed *OH and C-containing species, the oxide species could collectively facilitate *CO adsorption, resulting an enhanced selectivity towards valuable C2+ products during CO2RR.
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Affiliation(s)
- Fan Yang
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Shan Jiang
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Si Liu
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Paul Beyer
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Stefan Mebs
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany.
| | - Michael Haumann
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Christina Roth
- Electrochemical Process Engineering, Universität Bayreuth, Universitätsstraße 30, Bayreuth, 95447, Germany
| | - Holger Dau
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany.
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12
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Guo Y, Feng H, Zhang L, Wu Y, Lan C, Tang J, Wang J, Tang L. Insights into the Mechanism of Selective Removal of Heavy Metal Ions by the Pulsed/Direct Current Electrochemical Method. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:5589-5597. [PMID: 38485130 DOI: 10.1021/acs.est.3c10553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Heavy metal pollution treatment in industrial wastewater is crucial for protecting biological and environmental safety. However, the highly efficient and selective removal of heavy metal ions from multiple cations in wastewater is a significant challenge. This work proposed a pulse electrochemical method with a low-/high-voltage periodic appearance to selectively recover heavy metal ions from complex wastewater. It exhibited a higher recovery efficiency for heavy metal ions (100% for Pb2+ and Cd2+, >98% for Mn2+) than other alkali and alkaline earth metal ions (Na+, Ca2+, and Mg2+ were kept below 3.6, 1.3, and 2.6%, respectively) in the multicomponent solution. The energy consumption was only 34-77% of that of the direct current electrodeposition method. The results of characterization and experiment unveil the mechanism that the low-/high-voltage periodic appearance can significantly suppress the water-splitting reaction and break the mass-transfer limitation between heavy metal ions and electrodes. In addition, the plant study demonstrates the feasibility of treated wastewater for agricultural use, further proving the high sustainability of the method. Therefore, it provides new insights into the selective recovery of heavy metals from industrial wastewater.
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Affiliation(s)
- Yuyao Guo
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Haopeng Feng
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Lingyue Zhang
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Yangfeng Wu
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chenrui Lan
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Jing Tang
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Jiajia Wang
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Lin Tang
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
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13
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Hua W, Liu T, Zheng Z, Yuan H, Xiao L, Feng K, Hui J, Deng Z, Ma M, Cheng J, Song D, Lyu F, Zhong J, Peng Y. Pulse Electrolysis Turns on CO 2 Methanation through N-Confused Cupric Porphyrin. Angew Chem Int Ed Engl 2024; 63:e202315922. [PMID: 38287420 DOI: 10.1002/anie.202315922] [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: 10/20/2023] [Revised: 01/17/2024] [Accepted: 01/29/2024] [Indexed: 01/31/2024]
Abstract
Breaking the D4h symmetry in the square-planar M-N4 configuration of macrocycle molecular catalysts has witnessed enhanced electrocatalytic activity, but at the expense of electrochemical stability. Herein, we hypothesize that the lability of the active Cu-N3 motifs in the N-confused copper (II) tetraphenylporphyrin (CuNCP) could be overcome by applying pulsed potential electrolysis (PPE) during electrocatalytic carbon dioxide reduction. We find that applying PPE can indeed enhance the CH4 selectivity on CuNCP by 3 folds to reach the partial current density of 170 mA cm-2 at >60 % Faradaic efficiency (FE) in flow cell. However, combined ex situ X-ray diffraction (XRD), transmission electron microscope (TEM), and in situ X-ray absorption spectroscopy (XAS), infrared (IR), Raman, scanning electrochemical microscopy (SECM) characterizations reveal that, in a prolonged time scale, the decomplexation of CuNCP is unavoidable, and the promoted water dissociation under high anodic bias with lowered pH and enriched protons facilitates successive hydrogenation of *CO on the irreversibly reduced Cu nanoparticles, leading to the improved CH4 selectivity. As a key note, this study signifies the adaption of electrolytic protocol to the catalyst structure for tailoring local chemical environment towards efficient CO2 reduction.
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Affiliation(s)
- Wei Hua
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Tingting Liu
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Zhangyi Zheng
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Huihong Yuan
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Long Xiao
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Kun Feng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Jingshu Hui
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
| | - Zhao Deng
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Mutian Ma
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Jian Cheng
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Daqi Song
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Fenglei Lyu
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Jun Zhong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Yang Peng
- Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou, 215006, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215006, P. R. China
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14
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Wang J, Qin Y, Jin S, Yang Y, Zhu J, Li X, Lv X, Fu J, Hong Z, Su Y, Wu HB. Customizing CO 2 Electroreduction by Pulse-Induced Anion Enrichment. J Am Chem Soc 2023; 145:26213-26221. [PMID: 37944031 DOI: 10.1021/jacs.3c08748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Electrochemically converting CO2 into specified high-value products is critical for carbon neutral economics. However, governing the product distribution of the CO2 electroreduction on Cu-based catalysts remains challenging. Herein, we put forward an anion enrichment strategy to efficiently dictate the route of *CO reduction by a pulsed electrolysis strategy. Upon periodically applying a positive potential on the cathode, the anion concentration in the vicinity of the electrode increases apparently. By adopting KF, KCl, and KHCO3 as electrolytes, the dominant CO2 electroreduction product on commercial Cu foil can be tuned into CO (53% ± 2.5), C2+ (76.6 ± 2.1%), and CH4 (42.6 ± 2.1%) under pulsed electrolysis. Notably, one can delicately tailor the ratios of CO/CH4, CH4/C2+, and C2+/CO by simply changing the composition of the electrolyte. Density functional theory calculations demonstrate that locally enriched anions can affect the key CO2RR intermediates in different ways owing to their specific electronegativity and volume, which leads to the distinct selectivity. The present study highlights the importance of tuning ionic species at the electrode-electrolyte interface for customizing the CO2 electroreduction products.
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Affiliation(s)
- Jianghao Wang
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Yanyang Qin
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shoutong Jin
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yue Yang
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jie Zhu
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Xiaotong Li
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xiangzhou Lv
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jie Fu
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zijian Hong
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou Zhejiang 310027, China
| | - Yaqiong Su
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hao Bin Wu
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou Zhejiang 310027, China
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15
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Huang Y, He C, Cheng C, Han S, He M, Wang Y, Meng N, Zhang B, Lu Q, Yu Y. Pulsed electroreduction of low-concentration nitrate to ammonia. Nat Commun 2023; 14:7368. [PMID: 37963900 PMCID: PMC10645723 DOI: 10.1038/s41467-023-43179-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 11/02/2023] [Indexed: 11/16/2023] Open
Abstract
Electrocatalytic nitrate (NO3-) reduction to ammonia (NRA) has emerged as an alternative strategy for effluent treatment and ammonia production. Despite significant advancements that have been achieved in this field, the efficient conversion of low-concentration nitrate to ammonia at low overpotential remains a formidable challenge. This challenge stems from the sluggish reaction kinetics caused by the limited distribution of negatively charged NO3- in the vicinity of the working electrode and the competing side reactions. Here, a pulsed potential approach is introduced to overcome these issues. A good NRA performance (Faradaic efficiency: 97.6%, yield rate: 2.7 mmol-1 h-1 mgRu-1, conversion rate: 96.4%) is achieved for low-concentration (≤10 mM) nitrate reduction, obviously exceeding the potentiostatic test (Faradaic efficiency: 65.8%, yield rate: 1.1 mmol-1 h-1 mgRu-1, conversion rate: 54.1%). The combined results of in situ characterizations and finite element analysis unveil the performance enhancement mechanism that the periodic appearance of anodic potential can significantly optimize the adsorption configuration of the key *NO intermediate and increase the local NO3- concentration. Furthermore, our research implies an effective approach for the rational design and precise manipulation of reaction processes, potentially extending its applicability to a broader range of catalytic applications.
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Affiliation(s)
- Yanmei Huang
- Institute of Molecular Plus, School of Science, Tianjin University, 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Caihong He
- School of Materials Science and Engineering, University of Science and Technology Beijing, 100083, Beijing, China
| | - Chuanqi Cheng
- Institute of New Energy Materials, School of Materials Science and Engineering, Tianjin University, 300072, Tianjin, China
| | - Shuhe Han
- Institute of Molecular Plus, School of Science, Tianjin University, 300072, Tianjin, China
| | - Meng He
- Institute of Molecular Plus, School of Science, Tianjin University, 300072, Tianjin, China
| | - Yuting Wang
- Institute of Molecular Plus, School of Science, Tianjin University, 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Nannan Meng
- Institute of Molecular Plus, School of Science, Tianjin University, 300072, Tianjin, China
| | - Bin Zhang
- Institute of Molecular Plus, School of Science, Tianjin University, 300072, Tianjin, China
| | - Qipeng Lu
- School of Materials Science and Engineering, University of Science and Technology Beijing, 100083, Beijing, China.
- Shunde Innovation School, University of Science and Technology Beijing, 528399, Foshan, China.
| | - Yifu Yu
- Institute of Molecular Plus, School of Science, Tianjin University, 300072, Tianjin, China.
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China.
- Tianjin University-Asia Silicon Joint Research Center of Ammonia-Hydrogen New Energy, 810000, Xining, China.
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16
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Li Z, Wang L, Wang T, Sun L, Yang W. Steering the Dynamics of Reaction Intermediates and Catalyst Surface during Electrochemical Pulsed CO 2 Reduction for Enhanced C 2+ Selectivity. J Am Chem Soc 2023; 145:20655-20664. [PMID: 37639564 DOI: 10.1021/jacs.3c08005] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Developing alternative electrolysis techniques is crucial for advancing electrocatalysis in addition to tremendous efforts of material developments. Recently, pulse electrochemical CO2 reduction reaction (CO2RR) has demonstrated dramatic selectivity improvement toward multicarbon (C2+) products compared to potentiostatic electrochemical CO2RR, yet the underlying mechanisms remain little understood. Herein, we develop a fast time-resolved in situ Raman spectroscopic method with a time resolution of 0.25 s. We reveal that pulse electrolysis improves the C2+ selectivity of CO2RR through dynamic controls of the surface CuxO/Cu composition that would be unachievable under potentiostatic electrolysis. The population of the surface-adsorbed CO intermediate (COads) is characterized to be the determining factor in controlling reaction selectivity, which depicts the C2+/C1 selectivity of CO2RR under pulse conditions. Meanwhile, the vibrational character of COads, despite transforming dynamically between the low-frequency and high-frequency modes is characterized not to be the key factor in controlling the reaction selectivity. Such an active control of catalyst surface compositions and reaction intermediates enabled by pulse electrolysis offer a general way of regulating the electrocatalysis performance of broad electrochemical reactions beyond CO2RR.
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Affiliation(s)
- Zhuofeng Li
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310024, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, China
| | - Linqin Wang
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310024, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, China
| | - Tao Wang
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310024, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, China
| | - Licheng Sun
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310024, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, China
| | - Wenxing Yang
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310024, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, China
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17
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Zhang XD, Liu T, Liu C, Zheng DS, Huang JM, Liu QW, Yuan WW, Yin Y, Huang LR, Xu M, Li Y, Gu ZY. Asymmetric Low-Frequency Pulsed Strategy Enables Ultralong CO 2 Reduction Stability and Controllable Product Selectivity. J Am Chem Soc 2023; 145:2195-2206. [PMID: 36629383 DOI: 10.1021/jacs.2c09501] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Copper-based catalysts are widely explored in electrochemical CO2 reduction (CO2RR) because of their ability to convert CO2 into high-value-added multicarbon products. However, the poor stability and low selectivity limit the practical applications of these catalysts. Here, we proposed a simple and efficient asymmetric low-frequency pulsed strategy (ALPS) to significantly enhance the stability and the selectivity of the Cu-dimethylpyrazole complex Cu3(DMPz)3 catalyst in CO2RR. Under traditional potentiostatic conditions, Cu3(DMPz)3 exhibited poor CO2RR performance with the Faradaic efficiency (FE) of 34.5% for C2H4 and FE of 5.9% for CH4 as well as the low stability for less than 1 h. We optimized two distinguished ALPS methods toward CH4 and C2H4, correspondingly. The high selectivities of catalytic product CH4 (FECH4 = 80.3% and above 76.6% within 24 h) and C2H4 (FEC2H4 = 70.7% and above 66.8% within 24 h) can be obtained, respectively. The ultralong stability for 300 h (FECH4 > 60%) and 145 h (FEC2H4 > 50%) was also recorded with the ALPS method. Microscopy (HRTEM, SAED, and HAADF) measurements revealed that the ALPS method in situ generated and stabilized extremely dispersive and active Cu-based clusters (∼2.7 nm) from Cu3(DMPz)3. Meanwhile, ex situ spectroscopies (XPS, AES, and XANES) and in situ XANES indicated that this ALPS method modulated the Cu oxidation states, such as Cu(0 and I) with C2H4 selectivity and Cu(I and II) with CH4 selectivity. The mechanism under the ALPS methods was explored by in situ ATR-FTIR, in situ Raman, and DFT computation. The ALPS methods provide a new opportunity to boost the selectivity and stability of CO2RR.
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Affiliation(s)
- Xiang-Da Zhang
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Tianyang Liu
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Chang Liu
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - De-Sheng Zheng
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Jian-Mei Huang
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Qian-Wen Liu
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Wei-Wen Yuan
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Yue Yin
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Ling-Rui Huang
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Ming Xu
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Yafei Li
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Zhi-Yuan Gu
- Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
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18
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Yang Y, Louisia S, Yu S, Jin J, Roh I, Chen C, Fonseca Guzman MV, Feijóo J, Chen PC, Wang H, Pollock CJ, Huang X, Shao YT, Wang C, Muller DA, Abruña HD, Yang P. Operando studies reveal active Cu nanograins for CO 2 electroreduction. Nature 2023; 614:262-269. [PMID: 36755171 DOI: 10.1038/s41586-022-05540-0] [Citation(s) in RCA: 117] [Impact Index Per Article: 117.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 11/08/2022] [Indexed: 02/10/2023]
Abstract
Carbon dioxide electroreduction facilitates the sustainable synthesis of fuels and chemicals1. Although Cu enables CO2-to-multicarbon product (C2+) conversion, the nature of the active sites under operating conditions remains elusive2. Importantly, identifying active sites of high-performance Cu nanocatalysts necessitates nanoscale, time-resolved operando techniques3-5. Here, we present a comprehensive investigation of the structural dynamics during the life cycle of Cu nanocatalysts. A 7 nm Cu nanoparticle ensemble evolves into metallic Cu nanograins during electrolysis before complete oxidation to single-crystal Cu2O nanocubes following post-electrolysis air exposure. Operando analytical and four-dimensional electrochemical liquid-cell scanning transmission electron microscopy shows the presence of metallic Cu nanograins under CO2 reduction conditions. Correlated high-energy-resolution time-resolved X-ray spectroscopy suggests that metallic Cu, rich in nanograin boundaries, supports undercoordinated active sites for C-C coupling. Quantitative structure-activity correlation shows that a higher fraction of metallic Cu nanograins leads to higher C2+ selectivity. A 7 nm Cu nanoparticle ensemble, with a unity fraction of active Cu nanograins, exhibits sixfold higher C2+ selectivity than the 18 nm counterpart with one-third of active Cu nanograins. The correlation of multimodal operando techniques serves as a powerful platform to advance our fundamental understanding of the complex structural evolution of nanocatalysts under electrochemical conditions.
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Affiliation(s)
- Yao Yang
- Department of Chemistry, University of California, Berkeley, CA, USA.,Miller Institute for Basic Research in Science, University of California, Berkeley, CA, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Sheena Louisia
- Department of Chemistry, University of California, Berkeley, CA, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Sunmoon Yu
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.,Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - Jianbo Jin
- Department of Chemistry, University of California, Berkeley, CA, USA
| | - Inwhan Roh
- Department of Chemistry, University of California, Berkeley, CA, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Chubai Chen
- Department of Chemistry, University of California, Berkeley, CA, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Maria V Fonseca Guzman
- Department of Chemistry, University of California, Berkeley, CA, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Julian Feijóo
- Department of Chemistry, University of California, Berkeley, CA, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Peng-Cheng Chen
- Department of Chemistry, University of California, Berkeley, CA, USA.,Kavli Energy NanoScience Institute, Berkeley, CA, USA
| | - Hongsen Wang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA
| | | | - Xin Huang
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY, USA
| | - Yu-Tsun Shao
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA
| | - Cheng Wang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - David A Muller
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY, USA
| | - Héctor D Abruña
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY, USA
| | - Peidong Yang
- Department of Chemistry, University of California, Berkeley, CA, USA. .,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA. .,Department of Materials Science and Engineering, University of California, Berkeley, CA, USA. .,Kavli Energy NanoScience Institute, Berkeley, CA, USA.
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19
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Selectivity of CO2, carbonic acid and bicarbonate electroreduction over Iron-porphyrin catalyst: a DFT study. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2022.141784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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20
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Wang J, Zhou W, Li J, Yang C, Meng X, Gao J. Insights into the effects of pulsed parameters on H2O2 synthesis by two-electron oxygen reduction under pulsed electrocatalysis. Electrochem commun 2022. [DOI: 10.1016/j.elecom.2022.107414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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21
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Sun M, Staykov A, Yamauchi M. Understanding the Roles of Hydroxide in CO 2 Electroreduction on a Cu Electrode for Achieving Variable Selectivity. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Mingxu Sun
- Department of Chemistry, Graduate School of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Aleksandar Staykov
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Miho Yamauchi
- Department of Chemistry, Graduate School of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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22
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Xu L, Ma X, Wu L, Tan X, Song X, Zhu Q, Chen C, Qian Q, Liu Z, Sun X, Liu S, Han B. In Situ Periodic Regeneration of Catalyst during CO
2
Electroreduction to C
2+
Products. Angew Chem Int Ed Engl 2022; 61:e202210375. [DOI: 10.1002/anie.202210375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Liang Xu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Xiaodong Ma
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Limin Wu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Xingxing Tan
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Xinning Song
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Qinggong Zhu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Chunjun Chen
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Qingli Qian
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhimin Liu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiaofu Sun
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Shoujie Liu
- Chemistry and Chemical Engineering of Guangdong Laboratory Shantou 515063 China
| | - Buxing Han
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China
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23
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Xu L, Ma X, Wu L, Tan X, Song X, Zhu Q, Chen C, Qian Q, Liu Z, Sun X, Liu S, Han B. In Situ Periodic Regeneration of Catalyst during CO2 Electroreduction to C2+ Products. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Liang Xu
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Xiaodong Ma
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Limin Wu
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Xingxing Tan
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Xinning Song
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Qinggong Zhu
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Chunjun Chen
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Qingli Qian
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Zhimin Liu
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Xiaofu Sun
- Institute of Chemistry Chinese Academy of Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CHINA
| | - Shoujie Liu
- Chemistry and Chemical Engineering of Guangdong Laboratory Chemistry and Chemical Engineering of Guangdong Laboratory CHINA
| | - Buxing Han
- Chinese Academy of Sciences Institute of Chemistry Beiyijie number 2, Zhongguancun 100190 Beijing CHINA
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24
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Jeong S, Choi MH, Jagdale GS, Zhong Y, Siepser NP, Wang Y, Zhan X, Baker LA, Ye X. Unraveling the Structural Sensitivity of CO 2 Electroreduction at Facet-Defined Nanocrystals via Correlative Single-Entity and Macroelectrode Measurements. J Am Chem Soc 2022; 144:12673-12680. [PMID: 35793438 DOI: 10.1021/jacs.2c02001] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The conversion of CO2 into value-added products is a compelling way of storing energy derived from intermittent renewable sources and can bring us closer to a closed-loop anthropogenic carbon cycle. The ability to synthesize nanocrystals of well-defined structure and composition has invigorated catalysis science with the promise of nanocrystals that selectively express the most favorable sites for efficient catalysis. The performance of nanocrystal catalysts for the CO2 reduction reaction (CO2RR) is typically evaluated with nanocrystal ensembles, which returns an averaged system-level response of complex catalyst-modified electrodes with each nanocrystal likely contributing a different (unknown) amount. Measurements at single nanocrystals, taken in the context of statistical analysis of a population, and comparison to macroscale measurements are necessary to untangle the complexity of the ever-present heterogeneity in nanocrystal catalysts, achieve true structure-property correlation, and potentially identify nanocrystals with outlier performance. Here, we employ environment-controlled scanning electrochemical cell microscopy to isolate and investigate the electrocatalytic CO2RR response of individual facet-defined gold nanocrystals. Using correlative microscopy approaches, we conclusively demonstrate that {110}-terminated gold rhombohedra possess superior activity and selectivity for CO2RR compared with {111}-terminated octahedra and high-index {310}-terminated truncated ditetragonal prisms, especially at low overpotentials where electrode kinetics is anticipated to dominate the current response. The methodology framework described here could inform future studies of complex electrocatalytic processes through correlative single-entity and macroscale measurement techniques.
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Affiliation(s)
- Soojin Jeong
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Myung-Hoon Choi
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States.,Department of Chemistry, Texas A&M University, 580 Ross St, College Station, Texas 77843, United States
| | - Gargi S Jagdale
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Yaxu Zhong
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Natasha P Siepser
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Yi Wang
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Xun Zhan
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Lane A Baker
- Department of Chemistry, Texas A&M University, 580 Ross St, College Station, Texas 77843, United States
| | - Xingchen Ye
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
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25
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Yang Y, Roh I, Louisia S, Chen C, Jin J, Yu S, Salmeron MB, Wang C, Yang P. Operando Resonant Soft X-ray Scattering Studies of Chemical Environment and Interparticle Dynamics of Cu Nanocatalysts for CO 2 Electroreduction. J Am Chem Soc 2022; 144:8927-8931. [PMID: 35575474 DOI: 10.1021/jacs.2c03662] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Understanding the chemical environment and interparticle dynamics of nanoparticle electrocatalysts under operating conditions offers valuable insights into tuning their activity and selectivity. This is particularly important to the design of Cu nanocatalysts for CO2 electroreduction due to their dynamic nature under bias. Here, we have developed operando electrochemical resonant soft X-ray scattering (EC-RSoXS) to probe the chemical identity of active sites during the dynamic structural transformation of Cu nanoparticle (NP) ensembles through 1 μm thick electrolyte. Operando scattering-enhanced X-ray absorption spectroscopy (XAS) serves as a powerful technique to investigate the size-dependent catalyst stability under beam exposure while monitoring the potential-dependent surface structural changes. Small NPs (7 nm) in aqueous electrolyte were found to experience a predominant soft X-ray beam-induced oxidation to CuO despite only sub-second X-ray exposure. In comparison, large NPs (18 nm) showed improved resistivity to beam damage, which allowed the reliable observation of surface Cu2O electroreduction to metallic Cu. Small-angle X-ray scattering (SAXS) statistically probes the particle-particle interactions of large ensembles of NPs. This study points out the need for rigorous examination of beam effects for operando X-ray studies on electrocatalysts. The strategy of using EC-RSoXS that combines soft XAS and SAXS can serve as a general approach to simultaneously investigate the chemical environment and interparticle information on nanocatalysts.
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Affiliation(s)
- Yao Yang
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Miller Institute for Basic Research in Science, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Inwhan Roh
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Sheena Louisia
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Chubai Chen
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Jianbo Jin
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Sunmoon Yu
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - Miquel B Salmeron
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Cheng Wang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Peidong Yang
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Kavli Energy NanoScience Institute, Berkeley, California 94720, United States
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26
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Jiang S, D'Amario L, Dau H. Copper Carbonate Hydroxide as Precursor of Interfacial CO in CO 2 Electroreduction. CHEMSUSCHEM 2022; 15:e202102506. [PMID: 35289108 PMCID: PMC9314821 DOI: 10.1002/cssc.202102506] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 03/01/2022] [Indexed: 06/14/2023]
Abstract
Copper electrodes are especially effective in catalysis of C2 and further multi-carbon products in the CO2 reduction reaction (CO2 RR) and therefore of major technological interest. The reasons for the unparalleled Cu performance in CO2 RR are insufficiently understood. Here, the electrode-electrolyte interface was highlighted as a dynamic physical-chemical system and determinant of catalytic events. Exploiting the intrinsic surface-enhanced Raman effect of previously characterized Cu foam electrodes, operando Raman experiments were used to interrogate structures and molecular interactions at the electrode-electrolyte interface at subcatalytic and catalytic potentials. Formation of a copper carbonate hydroxide (CuCarHyd) was detected, which resembles the mineral malachite. Its carbonate ions could be directly converted to CO at low overpotential. These and further experiments suggested a basic mode of CO2 /carbonate reduction at Cu electrodes interfaces that contrasted previous mechanistic models: the starting point in carbon reduction was not CO2 but carbonate ions bound to the metallic Cu electrode in form of CuCarHyd structures. It was hypothesized that Cu oxides residues could enhance CO2 RR indirectly by supporting formation of CuCarHyd motifs. The presence of CuCarHyd patches at catalytic potentials might result from alkalization in conjunction with local electrical potential gradients, enabling the formation of metastable CuCarHyd motifs over a large range of potentials.
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Affiliation(s)
- Shan Jiang
- Department of PhysicsFreie Universität BerlinArnimallee 1414195BerlinGermany
| | - Luca D'Amario
- Department of PhysicsFreie Universität BerlinArnimallee 1414195BerlinGermany
- Department of ChemistryÅngström LaboratoryUppsala UniversityBox 52375120UppsalaSweden
| | - Holger Dau
- Department of PhysicsFreie Universität BerlinArnimallee 1414195BerlinGermany
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27
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Timoshenko J, Bergmann A, Rettenmaier C, Herzog A, Arán-Ais RM, Jeon HS, Haase FT, Hejral U, Grosse P, Kühl S, Davis EM, Tian J, Magnussen O, Roldan Cuenya B. Steering the structure and selectivity of CO2 electroreduction catalysts by potential pulses. Nat Catal 2022. [DOI: 10.1038/s41929-022-00760-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
AbstractConvoluted selectivity trends and a missing link between reaction product distribution and catalyst properties hinder practical applications of the electrochemical CO2 reduction reaction (CO2RR) for multicarbon product generation. Here we employ operando X-ray absorption and X-ray diffraction methods with subsecond time resolution to unveil the surprising complexity of catalysts exposed to dynamic reaction conditions. We show that by using a pulsed reaction protocol consisting of alternating working and oxidizing potential periods that dynamically perturb catalysts derived from Cu2O nanocubes, one can decouple the effect of the ensemble of coexisting copper species on the product distribution. In particular, an optimized dynamic balance between oxidized and reduced copper surface species achieved within a narrow range of cathodic and anodic pulse durations resulted in a twofold increase in ethanol production compared with static CO2RR conditions. This work thus prepares the ground for steering catalyst selectivity through dynamically controlled structural and chemical transformations.
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28
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Bui JC, Kim C, King AJ, Romiluyi O, Kusoglu A, Weber AZ, Bell AT. Engineering Catalyst-Electrolyte Microenvironments to Optimize the Activity and Selectivity for the Electrochemical Reduction of CO 2 on Cu and Ag. Acc Chem Res 2022; 55:484-494. [PMID: 35104114 DOI: 10.1021/acs.accounts.1c00650] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The electrochemical reduction of carbon dioxide (CO2R) driven by renewably generated electricity (e.g., solar and wind) offers a promising means for reusing the CO2 released during the production of cement, steel, and aluminum as well as the production of ammonia and methanol. If CO2 could be removed from the atmosphere at acceptable costs (i.e., <$100/t of CO2), then CO2R could be used to produce carbon-containing chemicals and fuels in a fully sustainable manner. Economic considerations dictate that CO2R current densities must be in the range of 0.1 to 1 A/cm2 and selectivity toward the targeted product must be high in order to minimize separation costs. Industrially relevant operating conditions can be achieved by using gas diffusion electrodes (GDEs) to maximize the transport of species to and from the cathode and combining such electrodes with a solid-electrolyte membrane by eliminating the ohmic losses associated with liquid electrolytes. Additionally, high product selectivity can be attained by careful tuning of the microenvironment near the catalyst surface (e.g., the pH, the concentrations of CO2 and H2O, and the identities of the cations in the double layer adjacent to the catalyst surface).We begin this Account with a discussion of our experimental and theoretical work aimed at optimizing catalyst microenvironments for CO2R. We first examine the effects of catalyst morphology on the production of multicarbon (C2+) products over Cu-based catalysts and then explore the role of mass transfer combined with the kinetics of buffer reactions in the local concentration of CO2 and pH at the catalyst surface. This is followed by a discussion of the dependence of the local CO2 concentration and pH on the dynamics of CO2R and the formation of specific products over both Cu and Ag catalysts. Next, we explore the impact of electrolyte cation identity on the rate of CO2R and the distribution of products. Subsequently, we look at utilizing pulsed electrolysis to tune the local pH and CO2 concentration at the catalyst surface. The last part of the discussion demonstrates that ionomer-coated catalysts in combination with pulsed electrolysis can enable the attainment of very high (>90%) selectivity to C2+ products over Cu in an aqueous electrolyte. This part of the Account is then extended to consider the difference in the catalyst-nanoparticle microenvironment, present in the catalyst layer of a membrane electrode assembly (MEA), with respect to that of a planar electrode immersed in an aqueous electrolyte.
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Affiliation(s)
- Justin C. Bui
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Chanyeon Kim
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Alex J. King
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Oyinkansola Romiluyi
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | | | | | - Alexis T. Bell
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
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29
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Wang J, Zhou W, Li J, Ding Y, Gao J. Recent Advances and Performance Enhancement Mechanisms of Pulsed Electrocatalysis. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a22080342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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30
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Frey D, Neyerlin KC, Modestino MA. Bayesian optimization of electrochemical devices for electrons-to-molecules conversions: the case of pulsed CO 2 electroreduction. REACT CHEM ENG 2022. [DOI: 10.1039/d2re00285j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Bayesian optimization (BO) was implemented to improve a membrane electrode assembly CO2 electroreduction device undergoing pulsed operation.
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Affiliation(s)
- Daniel Frey
- New York University, Tandon School of Engineering, Department of Chemical and Biomolecular Engineering, 6 Metrotech Center, Brooklyn, NY, USA
| | - K. C. Neyerlin
- National Renewable Energy Laboratory, Chemistry and Nanoscience Center, Golden, CO, USA
| | - Miguel A. Modestino
- New York University, Tandon School of Engineering, Department of Chemical and Biomolecular Engineering, 6 Metrotech Center, Brooklyn, NY, USA
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31
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Hydrothermal synthesis of long-chain hydrocarbons up to C 24 with NaHCO 3-assisted stabilizing cobalt. Proc Natl Acad Sci U S A 2021; 118:2115059118. [PMID: 34911765 PMCID: PMC8713749 DOI: 10.1073/pnas.2115059118] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2021] [Indexed: 01/28/2023] Open
Abstract
Abiotic CO2 reduction on transition metal minerals has been proposed to account for the synthesis of organic compounds in alkaline hydrothermal systems, but this reaction lacks experimental support, as only short-chain hydrocarbons (<C5) have been synthesized in artificial simulation. This presents a question: What particular hydrothermal conditions favor long-chain hydrocarbon synthesis? Here, we demonstrate the hydrothermal bicarbonate reduction at ∼300 °C and 30 MPa into long-chain hydrocarbons using iron (Fe) and cobalt (Co) metals as catalysts. We found the Co0 promoter responsible for synthesizing long-chain hydrocarbons to be extraordinarily stable when coupled with Fe-OH formation. Under these hydrothermal conditions, the traditional water-induced deactivation of Co is inhibited by bicarbonate-assisted CoOx reduction, leading to honeycomb-native Co nanosheets generated in situ as a new motif. The Fe-OH formation, confirmed by operando infrared spectroscopy, enhances CO adsorption on Co, thereby favoring further reduction to long-chain hydrocarbons (up to C24). These results not only advance theories for an abiogenic origin for some petroleum accumulations and the hydrothermal hypothesis of the emergence of life but also introduce an approach for synthesizing long-chain hydrocarbons by nonnoble metal catalysts for artificial CO2 utilization.
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32
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Kawamata Y, Hayashi K, Carlson E, Shaji S, Waldmann D, Simmons BJ, Edwards JT, Zapf CW, Saito M, Baran PS. Chemoselective Electrosynthesis Using Rapid Alternating Polarity. J Am Chem Soc 2021; 143:16580-16588. [PMID: 34596395 PMCID: PMC8711284 DOI: 10.1021/jacs.1c06572] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Challenges in the selective manipulation of functional groups (chemoselectivity) in organic synthesis have historically been overcome either by using reagents/catalysts that tunably interact with a substrate or through modification to shield undesired sites of reactivity (protecting groups). Although electrochemistry offers precise redox control to achieve unique chemoselectivity, this approach often becomes challenging in the presence of multiple redox-active functionalities. Historically, electrosynthesis has been performed almost solely by using direct current (DC). In contrast, applying alternating current (AC) has been known to change reaction outcomes considerably on an analytical scale but has rarely been strategically exploited for use in complex preparative organic synthesis. Here we show how a square waveform employed to deliver electric current-rapid alternating polarity (rAP)-enables control over reaction outcomes in the chemoselective reduction of carbonyl compounds, one of the most widely used reaction manifolds. The reactivity observed cannot be recapitulated using DC electrolysis or chemical reagents. The synthetic value brought by this new method for controlling chemoselectivity is vividly demonstrated in the context of classical reactivity problems such as chiral auxiliary removal and cutting-edge medicinal chemistry topics such as the synthesis of PROTACs.
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Affiliation(s)
- Yu Kawamata
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Kyohei Hayashi
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ethan Carlson
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Shobin Shaji
- IKA Works, Inc., 3550 General Atomics Court, MS G02/321, San Diego, California 92121, United States
| | - Dirk Waldmann
- IKA Works, Inc., 3550 General Atomics Court, MS G02/321, San Diego, California 92121, United States
- IKA-Werke GmbH & Co. KG Janke & Kunkel-Straße 10, Staufen 79219, Germany
| | - Bryan J Simmons
- Bristol Myers Squibb, 10300 Campus Point Drive Suite 100, San Diego, California 92121, United States
| | - Jacob T Edwards
- Bristol Myers Squibb, 10300 Campus Point Drive Suite 100, San Diego, California 92121, United States
| | - Christoph W Zapf
- Bristol Myers Squibb, 10300 Campus Point Drive Suite 100, San Diego, California 92121, United States
| | - Masato Saito
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Phil S Baran
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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Surface characterization of copper electrocatalysts by lead underpotential deposition. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115446] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Jeon HS, Timoshenko J, Rettenmaier C, Herzog A, Yoon A, Chee SW, Oener S, Hejral U, Haase FT, Roldan Cuenya B. Selectivity Control of Cu Nanocrystals in a Gas-Fed Flow Cell through CO 2 Pulsed Electroreduction. J Am Chem Soc 2021; 143:7578-7587. [PMID: 33956433 PMCID: PMC8154520 DOI: 10.1021/jacs.1c03443] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
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In this study, we
have taken advantage of a pulsed CO2 electroreduction reaction
(CO2RR) approach to tune the
product distribution at industrially relevant current densities in
a gas-fed flow cell. We compared the CO2RR selectivity
of Cu catalysts subjected to either potentiostatic conditions (fixed
applied potential of −0.7 VRHE) or pulsed electrolysis
conditions (1 s pulses at oxidative potentials ranging from Ean = 0.6 to 1.5 VRHE, followed by
1 s pulses at −0.7 VRHE) and identified the main
parameters responsible for the enhanced product selectivity observed
in the latter case. Herein, two distinct regimes were observed: (i)
for Ean = 0.9 VRHE we obtained
10% enhanced C2 product selectivity (FEC2H4 = 43.6% and FEC2H5OH = 19.8%) in comparison to the potentiostatic CO2RR at −0.7 VRHE (FEC2H4 = 40.9% and FEC2H5OH = 11%),
(ii) while for Ean = 1.2 VRHE, high CH4 selectivity (FECH4 =
48.3% vs 0.1% at constant −0.7 VRHE) was observed. Operando spectroscopy (XAS, SERS) and ex situ microscopy (SEM and TEM) measurements revealed that these differences
in catalyst selectivity can be ascribed to structural modifications
and local pH effects. The morphological reconstruction of the catalyst
observed after pulsed electrolysis with Ean = 0.9 VRHE, including the presence of highly defective
interfaces and grain boundaries, was found to play a key role in the
enhancement of the C2 product formation. In turn, pulsed
electrolysis with Ean = 1.2 VRHE caused the consumption
of OH– species near the catalyst surface, leading
to an OH-poor environment favorable for CH4 production.
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Affiliation(s)
- Hyo Sang Jeon
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Janis Timoshenko
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Clara Rettenmaier
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Antonia Herzog
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Aram Yoon
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - See Wee Chee
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Sebastian Oener
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Uta Hejral
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Felix T Haase
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
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Liu J, Zhao J, Deng X, Sun Y, Imhanria S, Wang W. Sn and N co-doped porous carbon catalyst electrochemically reduce CO2 into tunable syngas. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.03.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tang Z, Nishiwaki E, Fritz KE, Hanrath T, Suntivich J. Cu(I) Reducibility Controls Ethylene vs Ethanol Selectivity on (100)-Textured Copper during Pulsed CO 2 Reduction. ACS APPLIED MATERIALS & INTERFACES 2021; 13:14050-14055. [PMID: 33705088 DOI: 10.1021/acsami.0c17668] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The electrochemical CO2 reduction reaction (CO2RR) can convert widely available CO2 into value-added C2 products, such as ethylene and ethanol. However, low selectivity toward either compound limits the effectiveness of current CO2RR electrocatalysts. Here, we report the use of pulsed overpotentials to improve the ethylene selectivity to 67% with >75% overall C2 selectivity on (100)-textured polycrystalline Cu foil. The pulsed CO2RR can be made selective to either ethylene or ethanol by controlling the reaction temperature. We attribute the enhanced C2 selectivity to the improved CO dimerization kinetics on the active Cu surface on predominately (100)-textured Cu grains with the reduced hydrogen adsorption coverage during the pulsed CO2RR. The ethylene vs ethanol selectivity can be explained by the reducibility of the Cu(I) species during the cathodic potential cycle. Our work demonstrates a simple route to improve the ethylene vs ethanol selectivity and identifies Cu(I) as the species responsible for ethanol production.
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Affiliation(s)
- Zhichu Tang
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Emily Nishiwaki
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Kevin E Fritz
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Tobias Hanrath
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Jin Suntivich
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
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Casebolt R, Kimura KW, Levine K, Cimada DaSilva JA, Kim J, Dunbar TA, Suntivich J, Hanrath T. Effect of Electrolyte Composition and Concentration on Pulsed Potential Electrochemical CO
2
Reduction. ChemElectroChem 2021. [DOI: 10.1002/celc.202001445] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rileigh Casebolt
- Robert Frederick Smith School of Chemical and Biomolecular Engineering Cornell University Ithaca, New York 14853 USA
| | - Kevin W. Kimura
- Robert Frederick Smith School of Chemical and Biomolecular Engineering Cornell University Ithaca, New York 14853 USA
| | - Kelsey Levine
- Robert Frederick Smith School of Chemical and Biomolecular Engineering Cornell University Ithaca, New York 14853 USA
| | - Jessica Akemi Cimada DaSilva
- Robert Frederick Smith School of Chemical and Biomolecular Engineering Cornell University Ithaca, New York 14853 USA
| | - Jiyoon Kim
- Department of Materials Science and Engineering Cornell University Ithaca, New York 14853 USA
| | - Tyler A. Dunbar
- Robert Frederick Smith School of Chemical and Biomolecular Engineering Cornell University Ithaca, New York 14853 USA
| | - Jin Suntivich
- Department of Materials Science and Engineering Cornell University Ithaca, New York 14853 USA
| | - Tobias Hanrath
- Robert Frederick Smith School of Chemical and Biomolecular Engineering Cornell University Ithaca, New York 14853 USA
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Jännsch Y, Leung JJ, Hämmerle M, Magori E, Wiesner-Fleischer K, Simon E, Fleischer M, Moos R. Pulsed potential electrochemical CO2 reduction for enhanced stability and catalyst reactivation of copper electrodes. Electrochem commun 2020. [DOI: 10.1016/j.elecom.2020.106861] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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