In-situ imaging of strain-induced enhancement of hydrogen evolution activity on the extruded MoO2 sheets

Liao, Mansheng; Zhu, Qiaomei; Li, Shuhua; Li, Qiongqiong; Tao, Ziting; Fu, Yongchun

doi:10.1007/s12274-022-5170-0

Cited by 4 publications

(1 citation statement)

References 56 publications

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“…Subsequently, we show the nanosheets' nature of active sites using electrochemical noise scanning tunneling microscopy (n‐EC‐STM), [ 32 ] which enables an in situ observation of the local activity [ 33–36 ] as recently demonstrated by different groups. [ 37–39 ] These observations are supported and systematically explained by the most probable reaction pathways using density functional theory (DFT) calculations. Herein, the MnO 2 NS were modeled as a sheet of birnissite‐type δ‐MnO 2, which has been shown to have similar features to the Mn 4 CaO 5 in PS II.…”

Section: Introductionmentioning

confidence: 73%

Elucidating the Active Sites and Synergies in Water Splitting on Manganese Oxide Nanosheets on Graphite Support

Schmidt,

Wark,

Haid

et al. 2023

Advanced Energy Materials

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Photosystem II is nature's solution for driving the oxygen evolution reaction to oxidize water. A manganese‐oxide cluster is this protein's active center for water splitting, while the most efficient man‐made catalysts are costly noble metal‐based oxides. Facing the climate change, research on affordable and abundant electrocatalysts is crucial. To mimic the biological solution, manganese oxide nanosheets are synthesized and deposited on highly‐oriented pyrolytic graphite. This electrocatalyst is then examined with spectroscopic and electrochemical measurements, electrochemical noise scanning tunneling microscopy, and density functional theory calculations. The detailed investigation assigns the origin of its enhanced water‐splitting performance to detected activity at the nanosheet edges which the proposed mechanism explains further. Therefore, the results provide a blueprint for how to design efficient electrocatalysts for water oxidation with abundant materials.

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Section: Introductionmentioning

confidence: 73%

Elucidating the Active Sites and Synergies in Water Splitting on Manganese Oxide Nanosheets on Graphite Support

Schmidt,

Wark,

Haid

et al. 2023

Advanced Energy Materials

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Advanced Development of In situ Characterization Technique for Electrocatalytic Hydrogen Evolution Reaction

Zhu,

Hu,

Dong

et al. 2024

Advanced Sustainable Systems

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Hydrogen evolution reaction (HER) from water splitting using renewable energy provides a promising solution to the global energy crisis and environmental problems. However, the lack of in‐depth understanding of the reaction mechanism and clear identification of the catalytic active site has hindered the further development of low‐cost, high‐performance, and long‐life efficient electrocatalysts. Through in situ characterization techniques, the activity and stability of catalysts can be monitored in real‐time, track the structural evolution of catalytic reaction intermediates, and obtain a deep understanding of catalytic reaction mechanism, so as to feedback and guide the development and utilization of the catalyst. In this review, advanced development of in situ characterization techniques in electrocatalytic HER in recent years is summarized. In situ spectroscopy can be used to track the behavior of reaction intermediates such as adsorption, desorption, and structural evolution at the molecular level to reveal the electrocatalytic HER mechanism. The imaging techniques can be used to observe the evolution of material structure during HER in situ, which provides valuable information for the understanding of visualization of catalytic hydrogen evolution at atomic level. This review contributes to theadvanced development of in situ characterization technique for electrocatalytic HER.

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In situ identification of active sites during electrocatalytic hydrogen evolution

Wang

Jiao

et al. 2023

Nano Res.

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In-situ imaging of strain-induced enhancement of hydrogen evolution activity on the extruded MoO2 sheets

Cited by 4 publications

References 56 publications

Elucidating the Active Sites and Synergies in Water Splitting on Manganese Oxide Nanosheets on Graphite Support

Elucidating the Active Sites and Synergies in Water Splitting on Manganese Oxide Nanosheets on Graphite Support

Advanced Development of In situ Characterization Technique for Electrocatalytic Hydrogen Evolution Reaction

In situ identification of active sites during electrocatalytic hydrogen evolution

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