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Kowalski RM, Banerjee A, Yue C, Gracia SG, Cheng D, Morales-Guio CG, Sautet P. Electroreduction of Captured CO 2 on Silver Catalysts: Influence of the Capture Agent and Proton Source. J Am Chem Soc 2024. [PMID: 39037349 DOI: 10.1021/jacs.4c03915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
In the context of carbon reutilization, the direct electroreduction of captured CO2 (c-CO2RR) appears as an appealing approach since it avoids the energetically costly separation of CO2 from the capture agent. In this process, CO2 is directly reduced from its captured form. Here, we investigate the influence of the capture agent and proton source on that reaction from a combination of theory and experiment. Specifically, we consider methoxide-captured CO2, NH3-captured CO2, and bicarbonate on silver electrocatalysts. We show that the proton source plays a key role in the interplay of the chemistries for the electroreduction of protons, free CO2, and captured CO2. Our density functional theory calculations, including the influence of the potential, demonstrate that a proton source with smaller pKa improves the reactivity for c-CO2RR, but also increases the selectivity toward the hydrogen evolution reaction (HER) on silver surfaces. Since c-CO2RR requires an additional chemical protonation step, the influence of the proton source is stronger than that of the HER. However, c-CO2RR cannot compete with the HER on Ag, Experimentally, the dominant product observed is H2 with low amounts of CO being produced. Through a rotating cylinder electrode cell of well-defined mass-transport properties, we conclude that although methanol solvent exhibits a lower HER activity, HER remains dominant over c-CO2RR. Our work suggests that methoxide is a potential alternative capture agent to NH3 for direct reduction of captured CO2, though challenges in catalyst design, particularly in reducing the onset potential of c-CO2RR to surpass the HER, remain to be addressed.
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Affiliation(s)
- Robert Michael Kowalski
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - Avishek Banerjee
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - Chudi Yue
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - Sara G Gracia
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - Dongfang Cheng
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - Carlos G Morales-Guio
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
- Chemistry and Biochemistry Department, University of California, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
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Wang Y, Feric TG, Tang J, Fang C, Hamilton ST, Halat DM, Wu B, Celik H, Rim G, DuBridge T, Oshiro J, Wang R, Park AHA, Reimer JA. Carbon capture in polymer-based electrolytes. SCIENCE ADVANCES 2024; 10:eadk2350. [PMID: 38640239 PMCID: PMC11029803 DOI: 10.1126/sciadv.adk2350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 03/19/2024] [Indexed: 04/21/2024]
Abstract
Nanoparticle organic hybrid materials (NOHMs) have been proposed as excellent electrolytes for combined CO2 capture and electrochemical conversion due to their conductive nature and chemical tunability. However, CO2 capture behavior and transport properties of these electrolytes after CO2 capture have not yet been studied. Here, we use a variety of nuclear magnetic resonance (NMR) techniques to explore the carbon speciation and transport properties of branched polyethylenimine (PEI) and PEI-grafted silica nanoparticles (denoted as NOHM-I-PEI) after CO2 capture. Quantitative 13C NMR spectra collected at variable temperatures reveal that absorbed CO2 exists as carbamates (RHNCOO- or RR'NCOO-) and carbonate/bicarbonate (CO32-/HCO3-). The transport properties of PEI and NOHM-I-PEI studied using 1H pulsed-field-gradient NMR, combined with molecular dynamics simulations, demonstrate that coulombic interactions between negatively and positively charged chains dominate in PEI, while the self-diffusion in NOHM-I-PEI is dominated by silica nanoparticles. These results provide strategies for selecting adsorbed forms of carbon for electrochemical reduction.
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Affiliation(s)
- Yang Wang
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
| | - Tony G. Feric
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA
- Lenfest Center for Sustainable Energy, Columbia University, New York, NY 10027, USA
| | - Jing Tang
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Chao Fang
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Sara T. Hamilton
- Lenfest Center for Sustainable Energy, Columbia University, New York, NY 10027, USA
- Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA
| | - David M. Halat
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Bing Wu
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
| | - Hasan Celik
- College of Chemistry Nuclear Magnetic Resonance Facility (CoC-NMR), University of California, Berkeley, CA 94720, USA
| | - Guanhe Rim
- Lenfest Center for Sustainable Energy, Columbia University, New York, NY 10027, USA
- Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA
| | - Tara DuBridge
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
| | - Julianne Oshiro
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
| | - Rui Wang
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Ah-Hyung Alissa Park
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA
- Lenfest Center for Sustainable Energy, Columbia University, New York, NY 10027, USA
- Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA
| | - Jeffrey A. Reimer
- Department of Chemical and Biomolecular Engineering, College of Chemistry, UC Berkeley, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA
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Siegel RE, Pattanayak S, Berben LA. Reactive Capture of CO 2: Opportunities and Challenges. ACS Catal 2022. [DOI: 10.1021/acscatal.2c05019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Rachel E. Siegel
- Department of Chemistry, The University of California, 1 Shields Avenue, Davis, California 95161, United States
| | - Santanu Pattanayak
- Department of Chemistry, The University of California, 1 Shields Avenue, Davis, California 95161, United States
| | - Louise A. Berben
- Department of Chemistry, The University of California, 1 Shields Avenue, Davis, California 95161, United States
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Barlow JM, Clarke LE, Zhang Z, Bím D, Ripley KM, Zito A, Brushett FR, Alexandrova AN, Yang JY. Molecular design of redox carriers for electrochemical CO 2 capture and concentration. Chem Soc Rev 2022; 51:8415-8433. [PMID: 36128984 DOI: 10.1039/d2cs00367h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Developing improved methods for CO2 capture and concentration (CCC) is essential to mitigating the impact of our current emissions and can lead to carbon net negative technologies. Electrochemical approaches for CCC can achieve much higher theoretical efficiencies compared to the thermal methods that have been more commonly pursued. The use of redox carriers, or molecular species that can bind and release CO2 depending on their oxidation state, is an increasingly popular approach as carrier properties can be tailored for different applications. The key requirements for stable and efficient redox carriers are discussed in the context of chemical scaling relationships and operational conditions. Computational and experimental approaches towards developing redox carriers with optimal properties are also described.
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Affiliation(s)
- Jeffrey M Barlow
- Department of Chemistry, University of California, Irvine, California 92697, USA.
| | - Lauren E Clarke
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
| | - Zisheng Zhang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095-1569, USA.
| | - Daniel Bím
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095-1569, USA.
| | - Katelyn M Ripley
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
| | - Alessandra Zito
- Department of Chemistry, University of California, Irvine, California 92697, USA.
| | - Fikile R Brushett
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
| | - Anastassia N Alexandrova
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095-1569, USA.
| | - Jenny Y Yang
- Department of Chemistry, University of California, Irvine, California 92697, USA.
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