SERS Reveals the Presence of Au–O–O–H and Enhanced Catalytic Activity of Electrochemically Dealloyed AgAu Nanoparticles

Murke, Steffen; Wonner, Kevin; Alfarano, Serena R.; Rurainsky, Christian; Cignoni, Paolo; Tschulik, Kristina; Havenith, Martina

doi:10.1021/acs.jpcc.2c06515

Cited by 3 publications

(2 citation statements)

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“…Once the new Bidim-SEC cell was validated, we used this setup to study the electrochemical ORC of a Au disk electrode in chloride media. This electrode process is highly relevant in fields such as the electrogeneration of SERS substrates and numerous catalytic applications. − Bidim-SEC provides direct and very valuable information about this complex process in a simple way.…”

Section: Resultsmentioning

confidence: 99%

Bidimensional Spectroelectrochemistry with Tunable Thin-Layer Thickness

Perez-Estebanez,

Perales-Rondon,

Hernandez

et al. 2024

Anal. Chem.

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Bidimensional spectroelectrochemistry (Bidim-SEC) is an instrumental technique that provides operando UV/vis absorption information on electrochemical processes from two different points of view, using concomitantly a parallel and a normal optical configuration. The parallel configuration provides information about chemical species present in the diffusion layer, meanwhile the normal arrangement supplies information about changes occurring both in the diffusion layer and, mainly, on the electrode surface. The choice of a suitable cell to perform Bidim-SEC experiments is critical, especially while working under a thinlayer regime. So far, most of the proposed Bidim-SEC cells rely on the use of spacers to define the thin-layer thickness, which leads to working with constant thickness values. Herein, we propose a novel Bidim-SEC cell that enables easy-to-use micrometric control of the thin-layer thickness using a piezoelectric positioner. This device can be used for the study of complex interfacial systems and also to easily measure the key parameters of an electrochemical process. As a proof of concept, the study of the roughening of a gold electrode in KCl medium is performed, identifying key steps in the passivation and nanoparticle generation on the gold surface.

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Section: Resultsmentioning

confidence: 99%

Bidimensional Spectroelectrochemistry with Tunable Thin-Layer Thickness

Perez-Estebanez,

Perales-Rondon,

Hernandez

et al. 2024

Anal. Chem.

View full text Add to dashboard Cite

show abstract

“…It is highly desired to further understand the interaction between DNA modified MnO 2 nanosheets and other nanomaterials. Gold nanoparticles (AuNPs) have been extensively investigated due to their unique physical properties, which have been used in the applications like catalyst, biosensor, bioimaging, photothermal therapy and so on [ [31] , [32] , [33] ]. Attaching DNA on the surface of AuNPs is one critical way for the functionalization, which has been intensively studied [ 34 ].…”

Section: Introductionmentioning

confidence: 99%