Topography Mapping with Scanning Electrochemical Cell Microscopy

Liu, Gen; Hao, Luzhen; Li, Hao; Zhang, Kaimin; Yang, Xue; Liu, Dong; Zhu, Xiaoyan; Hao, Danni; Ma, Yanqing; Ma, Lei

doi:10.1021/acs.analchem.1c04692

Cited by 13 publications

(10 citation statements)

References 45 publications

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“…The high-throughput characterization potential of SECCM helps to study the intrinsic activity and the kinetic of electron-transfer processes. Catalyst materials for the HER that have been interrogated include transition metal dichalcogenides, ,,− bimetallic materials such as FeNi, Au, ,, Pt, ,− Zn, ITO, doped graphene, , boron-doped diamond, and low-carbon steel . SECCM has also been used to study the ORR, ,,,,− the OER, ,− and the CO 2 RR. ,,, …”

Section: Backstage: Principles and Applicability Of Operando Sepmmentioning

confidence: 99%

Operando Scanning Electrochemical Probe Microscopy during Electrocatalysis

et al. 2023

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Scanning electrochemical probe microscopy (SEPM) techniques can disclose the local electrochemical reactivity of interfaces in single-entity and sub-entity studies. Operando SEPM measurements consist of using a SEPM tip to investigate the performance of electrocatalysts, while the reactivity of the interface is simultaneously modulated. This powerful combination can correlate electrochemical activity with changes in surface properties, e.g., topography and structure, as well as provide insight into reaction mechanisms. The focus of this review is to reveal the recent progress in local SEPM measurements of the catalytic activity of a surface toward the reduction and evolution of O2 and H2 and electrochemical conversion of CO2. The capabilities of SEPMs are showcased, and the possibility of coupling other techniques to SEPMs is presented. Emphasis is given to scanning electrochemical microscopy (SECM), scanning ion conductance microscopy (SICM), electrochemical scanning tunneling microscopy (EC-STM), and scanning electrochemical cell microscopy (SECCM).

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Section: Backstage: Principles and Applicability Of Operando Sepmmentioning

confidence: 99%

Operando Scanning Electrochemical Probe Microscopy during Electrocatalysis

et al. 2023

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“…Both of the above methods are capable of assessing the ohmic drop of SECCM, yet each poses its own challenges. In order to employ eq , one must possess knowledge of the medium’s conductivity and the geometric parameters of the pipet, which can be obtained from SEM , or TEM images. , For the use of eq , the diffusion coefficient of the redox species must be known. It should be noted that eqs to () are based on the assumption of constant conductivity.…”

Section: Challenges Of Seccm In Corrosion Studiesmentioning

confidence: 99%

Perspectives on Corrosion Studies Using Scanning Electrochemical Cell Microscopy: Challenges and Opportunities

Lai,

Liu,

et al. 2023

Anal. Chem.

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Scanning electrochemical cell microscopy (SECCM) allows for electrochemical imaging at the micro-or nanoscale by confining the electrochemical reaction cell in a small meniscus formed at the end of a micro-or nanopipette. This technique has gained popularity in electrochemical imaging due to its high-throughput nature. Although it shows considerable application potential in corrosion science, there are still formidable and exciting challenges to be faced, particularly relating to the high-throughput characterization and analysis of microelectrochemical big data. The objective of this perspective is to arouse attention and provide opinions on the challenges, recent progress, and future prospects of the SECCM technique to the electrochemical society, particularly from the viewpoint of corrosion scientists. Specifically, four main topics are systematically reviewed and discussed: (1) the development of SECCM; (2) the applications of SECCM for corrosion studies; (3) the challenges of SECCM in corrosion studies; and (4) the opportunities of SECCM for corrosion science.

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“…Integration of nanoscale scanning electrochemical microscopy with colocalized structure characterization offers a compelling approach to resolve geometric active sites. ,− Scanning electrochemical cell microscopy (SECCM), a technique using a mobile micro- or nanodroplet at the end of glass pipette scanning across the surface, − has become a powerful approach to resolve spatial active sites. − One excellent example is the direct disclosure of active edges across microsized single-crystalline Co(OH) 2 platelets using a two-barrel glass pipette . In this work, we continued to explore the effect of metal ion lattice incorporation on single-particle electrocatalysis and geometric active site distribution.…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Geometric Active Sites for Oxygen Evolution Reaction on Crystalline Iron-Substituted Cobalt Hydroxide Nanoplates

Cong

Deng

et al. 2023

Anal. Chem.

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Transition-metal (oxy)hydroxides are among the most active and studied catalysts for the oxygen evolution reaction in alkaline electrolytes. However, the geometric distribution of active sites is still elusive. Here, using the well-defined crystalline iron-substituted cobalt hydroxide as a model catalyst, we reported the scanning electrochemical cell microscopy (SECCM) study of single-crystalline nanoplates, where the oxygen evolution reaction at individual nanoplates was isolated and evaluated independently. With integrated prior- and post-SECCM scanning electron microscopy of the catalyst morphology, correlated structure–activity information of individual electrocatalysts was obtained. Our result reveals that while the active sites are largely located at the edges of the pristine Co(OH)2 nanoplates, the Fe lattice incorporation significantly promotes the basal plane activities. Our approach of correlative imaging provides new insights into the effect of iron incorporation on active site distribution across nano-electrocatalysts.

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Topography Mapping with Scanning Electrochemical Cell Microscopy

Cited by 13 publications

References 45 publications

Operando Scanning Electrochemical Probe Microscopy during Electrocatalysis

Operando Scanning Electrochemical Probe Microscopy during Electrocatalysis

Perspectives on Corrosion Studies Using Scanning Electrochemical Cell Microscopy: Challenges and Opportunities

Elucidating the Geometric Active Sites for Oxygen Evolution Reaction on Crystalline Iron-Substituted Cobalt Hydroxide Nanoplates

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