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- Publisher Website: 10.1126/sciadv.abo0399
- Scopus: eid_2-s2.0-85130060840
- PMID: 35559679
- WOS: WOS:000798002100039
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Article: Probing dissolved CO2 (aq) in aqueous solutions for CO2 electroreduction and storage
Title | Probing dissolved CO<inf>2</inf>(aq) in aqueous solutions for CO<inf>2</inf> electroreduction and storage |
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Authors | |
Issue Date | 2022 |
Citation | Science Advances, 2022, v. 8, n. 19, article no. eabo0399 How to Cite? |
Abstract | CO2 dissolved in aqueous solutions CO2(aq) is important to CO2 capture, storage, photo-/electroreduction in the fight against global warming and to CO2 analysis in drinks. Here, we developed microscale infrared (IR) spectroscopy for in situ dynamic quantitating CO2(aq). The quantized CO2(g) rotational state transitions were observed to quench for CO2(aq), accompanied by increased H2O IR absorption. An accurate CO2 molar extinction coefficient ε was derived for in situ CO2(aq) quantification up to 58 atm. We directly measured CO2(aq) concentrations in electrolytes under CO2(g) bubbling and high-pressure conditions with high spectral and time resolutions. In KHCO3 electrolytes with CO2(aq) > ~1 M, CO2 electroreduction (CO2RR) to formate reached >98% Faradaic efficiencies on copper (Cu2O/Cu)–based electrocatalyst. Furthermore, CO2 dissolution/desolvation kinetics showed large hysteresis and ultraslow reversal of CO2(aq) supersaturation in aqueous systems, with implications to CO2 capture, storage, and supersaturation phenomena in natural water bodies. |
Persistent Identifier | http://hdl.handle.net/10722/335005 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, Jiachen | - |
dc.contributor.author | Guo, Jinyu | - |
dc.contributor.author | Dai, Hongjie | - |
dc.date.accessioned | 2023-10-20T06:52:25Z | - |
dc.date.available | 2023-10-20T06:52:25Z | - |
dc.date.issued | 2022 | - |
dc.identifier.citation | Science Advances, 2022, v. 8, n. 19, article no. eabo0399 | - |
dc.identifier.uri | http://hdl.handle.net/10722/335005 | - |
dc.description.abstract | CO2 dissolved in aqueous solutions CO2(aq) is important to CO2 capture, storage, photo-/electroreduction in the fight against global warming and to CO2 analysis in drinks. Here, we developed microscale infrared (IR) spectroscopy for in situ dynamic quantitating CO2(aq). The quantized CO2(g) rotational state transitions were observed to quench for CO2(aq), accompanied by increased H2O IR absorption. An accurate CO2 molar extinction coefficient ε was derived for in situ CO2(aq) quantification up to 58 atm. We directly measured CO2(aq) concentrations in electrolytes under CO2(g) bubbling and high-pressure conditions with high spectral and time resolutions. In KHCO3 electrolytes with CO2(aq) > ~1 M, CO2 electroreduction (CO2RR) to formate reached >98% Faradaic efficiencies on copper (Cu2O/Cu)–based electrocatalyst. Furthermore, CO2 dissolution/desolvation kinetics showed large hysteresis and ultraslow reversal of CO2(aq) supersaturation in aqueous systems, with implications to CO2 capture, storage, and supersaturation phenomena in natural water bodies. | - |
dc.language | eng | - |
dc.relation.ispartof | Science Advances | - |
dc.title | Probing dissolved CO<inf>2</inf>(aq) in aqueous solutions for CO<inf>2</inf> electroreduction and storage | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1126/sciadv.abo0399 | - |
dc.identifier.pmid | 35559679 | - |
dc.identifier.scopus | eid_2-s2.0-85130060840 | - |
dc.identifier.volume | 8 | - |
dc.identifier.issue | 19 | - |
dc.identifier.spage | article no. eabo0399 | - |
dc.identifier.epage | article no. eabo0399 | - |
dc.identifier.eissn | 2375-2548 | - |
dc.identifier.isi | WOS:000798002100039 | - |