Surface Acid–Base Properties of Anion-Adsorbed Species at Pt(111) Electrode Surfaces in Contact with CO<sub>2</sub>-Containing Perchloric Acid Solutions

Martínez‐Hincapié, Ricardo; Berná, Antonio; Rodes, A.; Climent, Vı́ctor; Feliu, Juan M.

doi:10.1021/acs.jpcc.6b00589

Cited by 35 publications

(46 citation statements)

References 51 publications

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“…The specific nature of the electrolyte could be also acting as a regulating agent of the interfacial pH . Ayemoba and Cuesta used attenuated total reflection surface‐enhanced infrared absorption spectroscopy (ATR‐SEIRAS) to investigate the specific role of the alkaline cation (Li, Na, K, Cs) in the CO 2 RR on gold electrodes .…”

Section: Structure Sensitivity In Co2 Reductionmentioning

confidence: 99%

“…[103] The specific nature of the electrolyte could be also acting as a regulating agent of the interfacial pH. [112] Ayemoba and Cuesta used attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) to investigate the specific role of the alkaline cation (Li, Na, K, Cs) in the CO 2 RR on gold electrodes. [107] Local changes of the interfacial pH were calculated from the relative intensity of both CO 2 and HCO 3 À IR bands, assuming that both species were in equilibrium.…”

Section: Electrolyte Effects: Role Of Ph and Specific Adsorptionmentioning

confidence: 99%

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Structure‐Sensitivity and Electrolyte Effects in CO₂ Electroreduction: From Model Studies to Applications

et al. 2019

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Aiming to reduce anthropogenic CO2 emissions, there is an urgent demand to develop more efficient and affordable technologies which convert CO2 into valuable feedstock molecules. The use of renewable electricity is a promising and sustainable approach to overcome this environmental issue, while producing valuable chemicals and clean fuels. However, the CO2 electroreduction reaction (CO2RR) still shows two main gaps: poor selectivity and required large overpotentials make the process not profitable enough. To overcome these challenges, model studies on single‐crystalline surfaces aiming to find the relations between surface structure/electrolyte interactions and activity/selectivity are necessary. In these model studies, tuning the electrolyte composition is also key for the fundamental understanding of the CO2RR. In this review, we first discuss the structure‐activity‐selectivity relations from studies on well‐ordered surfaces, i. e., single crystalline electrodes, for the CO2RR. We then summarise the role of the electrolyte, presenting work on classical aqueous solvents as well as non‐aqueous electrolytes such as ionic liquids. We illustrate the importance of carrying out studies on well‐defined electrified interfaces in order to get deep fundamental insights on the mechanism of the CO2RR, as well as scaling the process for real applications. Ultimately, this knowledge will be essential to rationally design the catalyst with tailored activity and selectivity for CO2 reduction.

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Section: Structure Sensitivity In Co2 Reductionmentioning

confidence: 99%

Section: Electrolyte Effects: Role Of Ph and Specific Adsorptionmentioning

confidence: 99%

Structure‐Sensitivity and Electrolyte Effects in CO₂ Electroreduction: From Model Studies to Applications

et al. 2019

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“…3. Plots of (= log[f/ (1f)] vs E extracted from the spectroscopic data (scattered symbols) reported by Martinez-Hincapie et al [1] The solid lines were obtained from the application of the Smith and White model [2] for optimized values of the parameters involved. i.e.…”

Section: Theoretical Aspectsmentioning

confidence: 99%

“…In a recent paper, Martinez-Hincapie et al [1] reported in situ reflection-absorption Fourier transform infrared spectra for a Pt(111) electrode in CO2-saturated KClO4/HClO4 aqueous solutions of pH values ranging from 0.38 to 3.10 as a function of the applied potential, E. Quantitative analyses of the data collected revealed significant changes in the relative ratios of the integrated intensities of the peaks, and thus in the coverage of adsorbed bicarbonate, , and carbonate, , with both E and pH. Shown in scattered symbols in Fig.…”

Section: Introductionmentioning

confidence: 98%

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Potential-induced acid-base chemistry of adsorbed species

Mantelli

Martínez‐Hincapié

Feliú

et al. 2019

Electrochimica Acta

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The pKa of bicarbonate ion adsorbed on the surface of Pt(111), HCO3 − (ads), in CO2saturated KClO4/HClO4 aqueous solutions has been determined by judicious application of a theoretical model originally proposed by Smith and White (Langmuir 1993, 9 (1), 1-3) to explain voltammetric features found for non-redox active alkyl chain monolayers bearing carboxylic moieties irreversibly bound to gold surfaces. The analysis herein presented relied on and coverages derived from in situ Fourier transform infrared spectroscopy measurements as a function of potential and pH reported by Martinez-Hincapie et al. (J. Phys. Chem. C 2016, 120 (29), 16191-16199), as input parameters, yielding a pKa for HCO3 − (ads) of ca. 2.6 ± 0.2. This value is significantly smaller than that of HCO3 − (aq) in bulk solutions, a phenomenon associated with the bonding of the species to the electrode surface, a factor that markedly modifies its acid base characteristics. 

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Effects of Electrolyte Ionic Species on Electrocatalytic Reactions: Advances, Challenges, and Perspectives

Lü

Zhou

et al. 2023

Advanced Energy Materials

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Electrolytes have a profound impact on the chemical environment of electrocatalysis, influencing the reaction rate and selectivity of products. Experimental and theoretical studies have extensively investigated the interaction mechanisms between electrolyte ions (i.e., alkali metal cations, carbonate anions) and reactants or the catalyst surface in electrocatalytic reactions such as the hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, water oxidation reaction, and CO 2 reduction reaction. Past studies have demonstrated a noticeable dependence of electrochemical reaction activity and selectivity on the identity of electrolyte ions. However, few overviews have comprehensively and specifically discussed the effects of electrolyte cations and anions on common electrochemical reactions. In order to clarify and give more insights on this research area, this review aims to summarize and highlight recent progress in understanding the effects of various electrolyte ionic species and their influence mechanisms in diverse electrocatalytic reactions for water splitting, H 2 O 2 production, and CO 2 reduction. The challenges and perspectives on the effect of electrolyte ions in electrocatalysis are also presented.

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Surface Acid–Base Properties of Anion-Adsorbed Species at Pt(111) Electrode Surfaces in Contact with CO₂-Containing Perchloric Acid Solutions

Cited by 35 publications

References 51 publications

Structure‐Sensitivity and Electrolyte Effects in CO₂ Electroreduction: From Model Studies to Applications

Structure‐Sensitivity and Electrolyte Effects in CO₂ Electroreduction: From Model Studies to Applications

Potential-induced acid-base chemistry of adsorbed species

Effects of Electrolyte Ionic Species on Electrocatalytic Reactions: Advances, Challenges, and Perspectives

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Surface Acid–Base Properties of Anion-Adsorbed Species at Pt(111) Electrode Surfaces in Contact with CO2-Containing Perchloric Acid Solutions

Cited by 35 publications

References 51 publications

Structure‐Sensitivity and Electrolyte Effects in CO2 Electroreduction: From Model Studies to Applications

Structure‐Sensitivity and Electrolyte Effects in CO2 Electroreduction: From Model Studies to Applications

Potential-induced acid-base chemistry of adsorbed species

Effects of Electrolyte Ionic Species on Electrocatalytic Reactions: Advances, Challenges, and Perspectives

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Product

Resources

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Surface Acid–Base Properties of Anion-Adsorbed Species at Pt(111) Electrode Surfaces in Contact with CO₂-Containing Perchloric Acid Solutions

Structure‐Sensitivity and Electrolyte Effects in CO₂ Electroreduction: From Model Studies to Applications

Structure‐Sensitivity and Electrolyte Effects in CO₂ Electroreduction: From Model Studies to Applications