Walsh JJ. Investigating the effects of pyridine and poly(4-vinylpyridine) on CO
2 reduction electrocatalysis at gold electrodes using in situ surface-enhanced Raman spectroelectrochemistry.
Phys Chem Chem Phys 2020;
22:12766-12771. [PMID:
32463399 DOI:
10.1039/d0cp00632g]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The CO2 reduction reaction (CO2RR) at metal electrodes is altered in the presence of pyridine and related species. Thick films of poly(4-vinylpyridine) on Au electrodes result in large current enhancements at low applied potentials but do not enhance CO2RR at these potentials. Surface-enhanced Raman spectroelectrochemistry can probe CO2-surface interactions and reveals that desorption of CO2 as bicarbonate is retarded in the presence of 4-PVP, with implications for ion-transport limitations in thick film CO2RR.
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