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Peer-reviewedCC BYJournal of the American Chemical Society

Decoupling CO2 Availability from Bulk Solubility via Biohybrid Reaction-Diffusion Nanoconfinement.

  • Fhysmélia F Albuquerque1
  • Artur C Souza1
  • Matheus S Corsino1
  • Lucas D Paquini1
  • Graziela C Sedenho1
  • Rafael N P Colombo1
  • Fabio H B Lima1
  • Frank N Crespilho1
  1. 1São Carlos Institute of Chemistry, University of São Paulo (USP), 13560-970São Carlos, Brazil.
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Abstract

Although contemporary CO2 reduction research is largely dominated by the search for novel active sites, the performance of even the most sophisticated catalysts remains fundamentally constrained by the sluggish mass transport of dissolved CO2. Here, we demonstrate that engineering the local chemical microenvironment is as critical as tuning intrinsic catalytic activity. Inspired by the functional orchestration of cyanobacterial carboxysomes, we report a biomimetic interface that integrates carbonic anhydrase within copper phosphate nanoflowers to establish a reaction-diffusion nanoreactor. Hyperspectral micro-FTIR imaging reveals a spatially localized and quantitatively enhanced CO2-associated signal at the biohybrid interface, consistent with the formation of an interfacial CO2 reservoir sustained by enzymatic bicarbonate dehydration. This interfacial CO2 enrichment directly translates into enhanced carbon utilization, manifested by higher conversion rates and improved selectivity toward carbon-derived reduction products relative to the enzyme-free control. Real-time online electrochemical mass spectrometry confirms a shift in selectivity toward carbon-derived products under conditions where conventional electrodes are transport-limited. This work establishes that shifting the focus from material-bound kinetics to interface-driven carbon management is also a strategy for advancing electrosynthesis.

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Cite

BibTeXRIS
BibTeX
@article{albuquerque2026decoupling,
  title = {{Decoupling CO2 Availability from Bulk Solubility via Biohybrid Reaction-Diffusion Nanoconfinement.}},
  author = {Fhysmélia F Albuquerque and Artur C Souza and Matheus S Corsino and Lucas D Paquini and Graziela C Sedenho and Rafael N P Colombo and Fabio H B Lima and Frank N Crespilho},
  journal = {Journal of the American Chemical Society},
  year = {2026},
  month = sep,
  doi = {10.1021/jacs.6c12039},
  url = {https://europepmc.org/article/MED/42915509},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Decoupling CO2 Availability from Bulk Solubility via Biohybrid Reaction-Diffusion Nanoconfinement.
AU  - Fhysmélia F Albuquerque
AU  - Artur C Souza
AU  - Matheus S Corsino
AU  - Lucas D Paquini
AU  - Graziela C Sedenho
AU  - Rafael N P Colombo
AU  - Fabio H B Lima
AU  - Frank N Crespilho
PY  - 2026
DA  - 2026/09/01
JO  - Journal of the American Chemical Society
DO  - 10.1021/jacs.6c12039
UR  - https://europepmc.org/article/MED/42915509
AB  - Although contemporary CO2 reduction research is largely dominated by the search for novel active sites, the performance of even the most sophisticated catalysts remains fundamentally constrained by the sluggish mass transport of dissolved CO2. Here, we demonstrate that engineering the local chemical microenvironment is as critical as tuning intrinsic catalytic activity. Inspired by the functional orchestration of cyanobacterial carboxysomes, we report a biomimetic interface that integrates carbonic anhydrase within copper phosphate nanoflowers to establish a reaction-diffusion nanoreactor. Hyperspectral micro-FTIR imaging reveals a spatially localized and quantitatively enhanced CO2-associated signal at the biohybrid interface, consistent with the formation of an interfacial CO2 reservoir sustained by enzymatic bicarbonate dehydration. This interfacial CO2 enrichment directly translates into enhanced carbon utilization, manifested by higher conversion rates and improved selectivity toward carbon-derived reduction products relative to the enzyme-free control. Real-time online electrochemical mass spectrometry confirms a shift in selectivity toward carbon-derived products under conditions where conventional electrodes are transport-limited. This work establishes that shifting the focus from material-bound kinetics to interface-driven carbon management is also a strategy for advancing electrosynthesis.
SN  - 0002-7863
SN  - 1520-5126
ER  -