Scanning probe microscopy for electrocatalysis

Wang, Yuqing; Skaanvik, Sebastian Amland; Xiong, Xuya; Wang, Shuangyin; Dong, Mingdong

doi:10.1016/j.matt.2021.09.024

Cited by 33 publications

(16 citation statements)

References 144 publications

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“…Unlike the existing methods for electrochemical measurement of single 2D material nanosheets with nanofabrication 19 , our method is easy and facile. Microelectrode-based measurements have provided insights into the electrochemical reaction of 2D MoS 2 nanosheets 39 , but these methods are limited by low throughput and temporal resolution and cannot acquire real-time electrochemical information, such as can be obtained through diffusion dynamics. Our approach was based on wide-field imaging without the use of a scanning microelectrode, which enabled a fast imaging speed and avoided the possible disturbance of the sample by the microelectrode.…”

Section: Discussionmentioning

confidence: 99%

Plasmonic imaging of the layer-dependent electrocatalytic activity of two-dimensional catalysts

et al. 2022

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Studying the localized electrocatalytic activity of heterogeneous electrocatalysts is crucial for understanding electrocatalytic reactions and further improving their performance. However, correlating the electrocatalytic activity with the microscopic structure of two-dimensional (2D) electrocatalysts remains a great challenge due to the lack of in situ imaging techniques and methods of tuning structures with atomic precision. Here, we present a general method of probing the layer-dependent electrocatalytic activity of 2D materials in situ using a plasmonic imaging technique. Unlike the existing methods, this approach was used to visualize the surface charge density and electrocatalytic activity of single 2D MoS2 nanosheets, enabling the correlation of layer-dependent electrocatalytic activity with the surface charge density of single MoS2 nanosheets. This work provides insights into the electrocatalytic mechanisms of 2D transition metal dichalcogenides, and our approach can serve as a promising platform for investigating electrocatalytic reactions at the heterogeneous interface, thus guiding the rational design of high-performance electrocatalysts.

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Section: Discussionmentioning

confidence: 99%

Plasmonic imaging of the layer-dependent electrocatalytic activity of two-dimensional catalysts

et al. 2022

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“…Scanning probe microscopy (SPM) is a microscopy family that originated with the invention of the scanning tunneling microscopy (STM) by Gerd Binnig and Heinrich Rohrer in 1982. [82] All scanning probe techniques share a common scanning mechanism in which a probe scans across a surface while monitoring probe-sample interactions, enabling atomic resolution imaging. The probe detects changes in the local environment that arise from probe-surface interactions.…”

Section: Scanning Probe Microscopiesmentioning

confidence: 99%

Operando imaging in electrocatalysis: insights into microstructural materials design

Fan,

Chen,

Zhang

et al. 2024

Chemistry An Asian Journal

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Electrocatalysis plays a pivotal role in renewable energy conversion and associated chemical production, enabling a variety of emerging sustainability technologies with societal impacts. Achieving marked improvement in electrocatalytic performance relies on a deep understanding of catalyst microstructures and catalytic mechanisms, with a particular emphasis on the detailed, spatiotemporally resolved characterizations of the underlying fundamental electrocatalytic processes. This fundamental need drives the development of operando imaging techniques, which improve the ability to detect dynamic structural changes in electrocatalysts and establish clear structure‐performance relationships for morphologically complex, hierarchically structured catalytic materials. This review aims to highlight significant advancements in the application of operando imaging techniques to develop a deeper understanding of important heterogeneous electrocatalytic reactions critical for emerging sustainability technologies. We summarize the up‐to‐date key mechanistic insights regarding these reactions achieved through a range of operando imaging techniques, including electron microscopies, X‐ray imaging techniques, scanning probe microscopies, and optical microscopies. We conclude by pointing out emerging directions and future prospects within the field of operando imaging in electrocatalysis.

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“…These techniques offer a high spatial resolution, allowing for the observation of surface reconstructions and changes in the atomic structure of catalysts as they undergo reactions. [ 31 ] These techniques have been discussed in details with their operation criteria and limitations in several excellent reviews. [ 32 ] Monitoring the catalytic activity while tracking the growth of electrodeposits using any of these operando techniques can be employed to establish a correlation between catalytic activity and a specific species, thereby identifying the primary contributor to the catalytic activity.…”

Section: Bonding/interaction Modes Of Molecular Species On a Solid Su...mentioning

confidence: 99%

Molecular Nature of Electrodeposits in Electrochemical Water Oxidation

Younus

Ahmad

Al‐Abri

et al. 2023

Advanced Energy Materials

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The molecular nature and the structure of the real catalyst are matters of serious concern in homogeneous catalysis. Catalyst transformation in molecular water oxidation catalysis (WOC) is usually linked to catalyst decomposition with the generation of nanostructured materials. This is mainly due to the operational conditions that are conducive for the formation of metal oxides (MOx), which have a strong affinity for adsorbing onto the electrodes’ surfaces. Recently, the exhibition of the molecular nature of the electrodeposits rather than MOx is a breakthrough in the field of WOC, suggesting that deposits in electrocatalysis are not constrained to metal oxides/hydroxides after molecular catalyst decomposition. Therefore, several points should be considered before deciding whether the deposits are aggregates of a molecular structure or simple metal oxides formed due to the decomposition of the original structure. Thus, the aim of this perspective is to showcase the examples of homogeneous WOCs where metal–organic species are electrodeposited instead of metal oxide‐based catalysts. The transformation of heterogenized molecular catalysts for WO into a more electroactive form while preserving their molecular identity, is also discussed. This summary provides an overview of the molecular nature of electrodeposits, how to identify their presence and decide about their nature.

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Scanning probe microscopy for electrocatalysis

Cited by 33 publications

References 144 publications

Plasmonic imaging of the layer-dependent electrocatalytic activity of two-dimensional catalysts

Plasmonic imaging of the layer-dependent electrocatalytic activity of two-dimensional catalysts

Operando imaging in electrocatalysis: insights into microstructural materials design

Molecular Nature of Electrodeposits in Electrochemical Water Oxidation

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