Surface‐Enhanced Raman Spectroscopic Evidence of Key Intermediate Species and Role of NiFe Dual‐Catalytic Center in Water Oxidation

Hu, Cejun; Hu, Yunfeng; Fan, Chenghao; Yang, Ling; Zhang, Yutong; Li, Haixia; Xie, Wei

doi:10.1002/anie.202103888

Cited by 214 publications

(121 citation statements)

References 62 publications

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“…Additionally, a more detailed analysis of the active sites of Ni 3 FeO x was performed by using label‐free surface‐enhanced Raman spectroscopy. [ 51 ] As illustrated in Figure 4e, Raman peaks between 1100 and 1200 cm −1 are attributed to the bridge and top‐mode OO − , respectively (Figure 4f). As potential rises up, the OO − Raman peak first appears and then disappears, meanwhile, Ni III ‐O peaks emerges, indicating that OO − is converted to O 2 with the help of Ni III sites.…”

Section: In Situ Optical Techniquesmentioning

confidence: 99%

In Situ Investigation on Life‐Time Dynamic Structure–Performance Correlation Toward Electrocatalyst Service Behavior in Water Splitting

Xie

Sun

Tao

et al. 2022

Adv Funct Materials

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Electrocatalytic water splitting is recognized as quite a promising protocol for the renewable hydrogen energy production, and significant effort has been devoted to the design of high‐performance electrocatalysts that can efficiently alleviate the critical issue of fossil fuel scarcity. However, the vast majority of traditional design strategies restrictedly focus on the pristine electrocatalyst structure and ultimate performance results, which may lead to the incorrect or even opposite understanding of catalytic structure–performance correlations. With the burgeoning development of in situ techniques, the dynamic service behaviors of electrocatalysts during water splitting have been growingly investigated from enriched perspectives, only by which can the life‐time dynamic structure–performance correlations be established. Herein, to shed new light on the next‐stage development of in situ investigations for water splitting electrocatalysts, a series of dynamic service behavior that existed in water splitting process and highlight their key role for understanding the life‐time dynamic structure–performance correlations is comprehensively summarized. Besides, a wide variety of in situ techniques are systematically dissected in terms of their functional features, advantages, and limitations. Critical challenges and prospects are also discussed for establishing the life‐time dynamic structure–performance correlations of water splitting electrocatalysts.

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Section: In Situ Optical Techniquesmentioning

confidence: 99%

In Situ Investigation on Life‐Time Dynamic Structure–Performance Correlation Toward Electrocatalyst Service Behavior in Water Splitting

Xie

Sun

Tao

et al. 2022

Adv Funct Materials

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“…Hu et al employed bifunctional Au@Ni 3 FeO x core−satellite superstructures to study the oxygen evolution reaction (OER) mechanism in alkaline medium. 101 O−O intermediate species locate at 1142 and 1170 cm −1 , indicating that Fe atoms could adsorb OH − and convert it to O 2− . The superoxide was further oxidized to O 2 through the electron transfer to Ni atoms (Figure 5d).…”

Section: Applied Studies Of the Solid−liquid Interface By In Situ Ram...mentioning

confidence: 99%

“…Water electrolysis technology is an important driving force for the green development of hydrogen energy industry. Hu et al employed bifunctional Au@Ni 3 FeO x core–satellite superstructures to study the oxygen evolution reaction (OER) mechanism in alkaline medium . O–O intermediate species locate at 1142 and 1170 cm –1 , indicating that Fe atoms could adsorb OH – and convert it to O 2– .…”

Section: Applied Studies Of the Solid–liquid Interface By In Situ Ram...mentioning

confidence: 99%

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Watching Reactions at Solid–Liquid Interfaces with in Situ Raman Spectroscopy

et al. 2021

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Accurate real-time molecular-level monitoring of the physicochemical properties of species at the solid–liquid interfaces under ambient conditions with good temporal and spatial resolution is an end goal of surface science and analytical chemistry. In situ surface-sensitive Raman techniques, chiefly surface-enhanced Raman spectroscopy (SERS), and more recently shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) have helped to liberate the dependence of surface science on ultrahigh vacuum (UHV) systems. In recent years, owing to the advent of novel surface-sensitive Raman spectroscopic techniques, considerable advancements in understanding have been achieved. Here, our aim is 3-fold: (1) to give a summary of some recent advances of in situ Raman spectroscopic techniques, (2) to discuss some of the applications and fields which in situ Raman spectroscopic interfacial studies have been applied to date, and (3) to give a perspective of in situ Raman spectroscopic techniques for studying solid–liquid interfaces that is accessible to the broader scientific community.

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“…Therefore, there is an urgent need to develop efficient OER non-noble metal electrocatalysts. Researchers demonstrated that transition metal (TM) with empty d-electron orbital participates in the reaction as catalyst [8,9]. In particular, Ni-based transition metals are highly efficient OER catalysts [10,11].…”

Section: Introductionmentioning

confidence: 99%

Controllable Synthesis of Graphene-Encapsulated NiFe Nanofiber for Oxygen Evolution Reaction Application

Rong

Guo

et al. 2021

J. Compos. Sci.

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Carbon-Encapsulated NiFe Nanofiber NixFey@C-CNFs have been demonstrated to be promising candidates to replace conventional nobel metals-based catalysts for oxygen evolution reaction. Here, we developed a facile method of electrospinning and high temperature carbonization to synthesize NixFey@C-CNFs catalysts. It is proved that Ni3Fe7@C-CNFs exhibited low overpotential (245 mV) and excellent stability in alkaline electrolyte for OER. This work provides a good platform for the synthesis and design of graphene-encapsulated alloy catalysts.

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Surface‐Enhanced Raman Spectroscopic Evidence of Key Intermediate Species and Role of NiFe Dual‐Catalytic Center in Water Oxidation

Cited by 214 publications

References 62 publications

In Situ Investigation on Life‐Time Dynamic Structure–Performance Correlation Toward Electrocatalyst Service Behavior in Water Splitting

In Situ Investigation on Life‐Time Dynamic Structure–Performance Correlation Toward Electrocatalyst Service Behavior in Water Splitting

Watching Reactions at Solid–Liquid Interfaces with in Situ Raman Spectroscopy

Controllable Synthesis of Graphene-Encapsulated NiFe Nanofiber for Oxygen Evolution Reaction Application

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