In situ electrochemical dehydrogenation of ultrathin Co(OH)2 nanosheets for enhanced hydrogen evolution

Zhou, Qian; Bian, Qihang; Liao, Liling; Fang, Yu; Li, Dongyang; Tang, Dongsheng; Zhou, Haiqing

doi:10.1016/j.cclet.2022.02.053

Cited by 22 publications

(12 citation statements)

References 47 publications

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“…S13,† the 466 cm −1 band is attributed to CoOOH, indicating the phase transition from Co(OH) 2 to CoOOH. 64 The band of 560 cm −1 is attributed to Ni–O vibrations in β-NiOOH, indicating a phase transition from Ni(OH) 2 to β-NiOOH. 65…”

Section: Resultsmentioning

confidence: 99%

Sea urchin-like amorphous MgNiCo mixed metal hydroxide nanoarrays for efficient overall water splitting under industrial electrolytic conditions

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Sea urchin-like amorphous MgNiCo mixed metal hydroxide nanoarrays for efficient overall water splitting under industrial electrolytic conditions

et al. 2023

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“…(c) In-situ Raman spectrum of Co(OH) 2 under electrochemical activation in 1 M KOH, with a cathodic current density of −10 mA cm –2 applied. Reproduced with permission from refs and . Copyright 2020 Wiley and 2022 Elsevier.…”

Section: Pgm-free Electrocatalystsmentioning

confidence: 99%

“…The authors provided a CoOOH/Co(OH) 2 heterostructure catalyst derived from Co(OH) 2 via an in-situ electrochemical dehydrogenation/activation method. 140 In this study, in-situ Raman analysis was used to monitor and verify the structural transformation of Co(OH) 2 under the application of a cathodic current density of −10 mA cm −2 in 1 M KOH (Figure 10c). Initially, there are only vibrational modes that correspond to Co(OH) ).…”

Section: Surface Reconfiguration Of Electrocatalysts Based On Other T...mentioning

confidence: 99%

A Review on the Application of In-Situ Raman Spectroelectrochemistry to Understand the Mechanisms of Hydrogen Evolution Reaction

Yoo,

Yesudoss,

Johnson

et al. 2023

ACS Catal.

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In our ever-growing society, enhanced energy security is needed now more than ever to mitigate large-scale climate change. One avenue for the renewable and sustainable energy transition is through electrochemical processes, such as water electrolysis, where hydrogen is produced through the hydrogen evolution reaction (HER). Currently, however, electrocatalysts for HER are either too costly or do not perform to industrial requirements. To mitigate this, a deeper understanding of the electrocatalytic system, including active site determination and structural reconfiguration, is needed. In-situ Raman spectroelectrochemistry is a powerful method in elucidating the mechanisms of electrocatalytic reactions in practical conditions due to its compatibility with electrolytes, small analysis spot size, high acquisition speed, and relative ease of spectral assignment. For the HER in particular, in-situ Raman spectroelectrochemistry can elucidate the active site location by providing a molecular fingerprint of adsorbed hydrogen onto a catalytic active site. In this Review, we provide an overview of the existing experimental works for HER using in-situ Raman spectroelectrochemistry. We discuss the application to existing electrocatalysts, such as the benchmark Pt-based materials and Pt-free alternatives, and we provide insights on the properties needed for a powerful, yet low-cost, HER electrocatalyst. We also discuss ways this method can be applied to further develop emerging electrocatalyst materials such as MXenes. Finally, we examine pertinent works specifically based on surface sensitive Raman techniques, such as surface enhanced Raman spectroscopy (SERS), which provide a revolutionary direction for future related works. Overall, this Review addresses the urgent need for applications of in-situ spectroelectrochemical methods to advance the discovery of catalysts for carbon-neutral energy.

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“…11 Some oxides, hydroxides, and hydroxyl oxides have good HER performances and excellent durabilities; however, they suffer from poor conductivities. 12,13 Several cobalt-based compounds have subsequently attracted considerable attention. For example, Co 3 C, CoP and Co 2 B have intrinsic electronic structure tunability, which makes them exhibit good HER activity.…”

Section: Introductionmentioning

confidence: 99%

Carbon layer-protected self-supporting CoSe₂ nanowire arrays for durable hydrogen evolution reaction catalysts

Wang,

et al. 2023

Sustainable Energy Fuels

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In situ electrochemical dehydrogenation of ultrathin Co(OH)2 nanosheets for enhanced hydrogen evolution

Cited by 22 publications

References 47 publications

Sea urchin-like amorphous MgNiCo mixed metal hydroxide nanoarrays for efficient overall water splitting under industrial electrolytic conditions

Sea urchin-like amorphous MgNiCo mixed metal hydroxide nanoarrays for efficient overall water splitting under industrial electrolytic conditions

A Review on the Application of In-Situ Raman Spectroelectrochemistry to Understand the Mechanisms of Hydrogen Evolution Reaction

Carbon layer-protected self-supporting CoSe₂ nanowire arrays for durable hydrogen evolution reaction catalysts

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In situ electrochemical dehydrogenation of ultrathin Co(OH)2 nanosheets for enhanced hydrogen evolution

Cited by 22 publications

References 47 publications

Sea urchin-like amorphous MgNiCo mixed metal hydroxide nanoarrays for efficient overall water splitting under industrial electrolytic conditions

Sea urchin-like amorphous MgNiCo mixed metal hydroxide nanoarrays for efficient overall water splitting under industrial electrolytic conditions

A Review on the Application of In-Situ Raman Spectroelectrochemistry to Understand the Mechanisms of Hydrogen Evolution Reaction

Carbon layer-protected self-supporting CoSe2 nanowire arrays for durable hydrogen evolution reaction catalysts

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Carbon layer-protected self-supporting CoSe₂ nanowire arrays for durable hydrogen evolution reaction catalysts