Ionically selective carbon nanotubes for hydrogen electrocatalysis in the hydrogen–bromine redox flow battery

Hardisty, Samuel S.; Saadi, Kobby; Reddy, Samala Nagaprasad; Grinberg, Ilya; Zitoun, David

doi:10.1016/j.mtener.2021.100937

Cited by 3 publications

(5 citation statements)

References 51 publications

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“…This material has been characterized indepth in another publication. 24 XPS was used to assess the chemical nature of the samples. The XPS has been recorded on nanoparticles (NP24) and we used the formalism commonly found in the investigation of nanoparticle to fit the data set: bulk refers to the core atoms with a zerovalent state, surface to the surface atoms with lower coordination state (oxidation state between 0 and 2), and Pt-O to Pt(II) oxidation state.…”

Section: Resultsmentioning

confidence: 99%

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Single‐atom Pt on carbon nanotubes for selective electrocatalysis

Hardisty,

Lin,

Kucernak

et al. 2023

Carbon Energy

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Utilizing supported single atoms as catalysts presents an opportunity to reduce the usage of critical raw materials such as platinum, which are essential for electrochemical reactions such as hydrogen oxidation reaction (HOR). Herein, we describe the synthesis of a Pt single electrocatalyst inside single‐walled carbon nanotubes (SWCNTs) via a redox reaction. Characterizations via electron microscopy, X‐ray photoelectron microscopy, and X‐ray absorption spectroscopy show the single‐atom nature of the Pt. The electrochemical behavior of the sample to hydrogen and oxygen was investigated using the advanced floating electrode technique, which minimizes mass transport limitations and gives a thorough insight into the activity of the electrocatalyst. The single‐atom samples showed higher HOR activity than state‐of‐the‐art 30% Pt/C while almost no oxygen reduction reaction activity in the proton exchange membrane fuel cell operating range. The selective activity toward HOR arose as the main fingerprint of the catalyst confinement in the SWCNTs.

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Section: Resultsmentioning

confidence: 99%

“…The confined nanoparticles formed after sintering clearly demonstrate that the single atoms are inside the SWCNTs. This material has been characterized in‐depth in another publication 24 …”

Section: Resultsmentioning

confidence: 99%

Single‐atom Pt on carbon nanotubes for selective electrocatalysis

Hardisty,

Lin,

Kucernak

et al. 2023

Carbon Energy

Self Cite

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“…Due to the unique electronic structure of single atoms, SACs can greatly improve the intrinsic catalytic activity of metal atom active centers, which brings breakthroughs to nonnoble metal‐based catalysts (e.g., Fe, Co, Ni, Cu, Zn, Mn, W, Mo, etc.). [ 132 ] Generally, these metals are commonly loaded on two substrates, which are carbon‐based materials, such as graphene, [ 133 ] nanotubes, [ 134 ] and organic frameworks, [ 98 ] and metal oxides, [ 135 ] or sulfides. [ 136 ] Among the extensively investigated nonnoble metal‐based transition metal SACs, Co and Fe are the most commonly used, so the following will mainly introduce the relevant progress of Co‐based and Fe‐based SACs.…”

Section: Main Types Of Catalystsmentioning

confidence: 99%

Recent progress and perspective on electrocatalysis in neutral media: Mechanisms, materials, and advanced characterizations

Lai,

Shang,

Jiao

et al. 2024

Interdisciplinary Materials

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Electrocatalysis, which involves oxidation and reduction reactions with direct electron transfer, is essential for a variety of clean energy conversion devices. Currently, the vast majority of studies regarding electrocatalysis reactions focus on strong acidic or alkaline media because of the higher catalytic activity. Nevertheless, some inherent drawbacks, including the corrosive environment, expensive proton exchange membranes, and side effects, are still hard to break through. A sustainably promising way to overcome these shortcomings is to deploy neutral/near‐neutral electrolytes for electrocatalysis reactions. Unfortunately, insufficient research in this area due to the lack of attention to related issues has slowed down the development process. In this review, we systematically review the catalytic reaction mechanisms, neutral electrolytes, electrocatalysts, and modification strategies carried out in neutral media on the three most common electrocatalytic reactions, that is, hydrogen evolution reaction, oxygen reduction reaction, and oxygen evolution reaction. Furthermore, the advanced characterization tools for guiding catalyst synthesis and mechanistic studies are also summarized. Eventually, we propose some challenges and perspectives on electrocatalysis reactions in neutral media and hope it will attract more research interest and provide guidance in neutral electrocatalysis.

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“…Moreover, crossover of Br − /Br 3 − species results in the degradation of the hydrogen oxidation/evaluation catalyst. 52,53 So, significant attention has been paid to the development of H 2 /inorganic metal hybrid systems owing to its abundant inorganic metals, low cost, and eco-friendliness. For instance, the H 2 /Ce redox couple was reported but its practical application is seriously limited by the sluggish kinetics of Ce 3+ /Ce 4+ .…”

Section: Development Of Manganese-based Redox Flow Batteriesmentioning

confidence: 99%

“…Moreover, crossover of Br À /Br 3 À species results in the degradation of the hydrogen oxidation/evaluation catalyst. 52,53 So, significant attention has been paid to the development of H 2 /inorganic metal hybrid systems owing to its abundant inorganic metals, low cost, and eco-friendliness.…”

Section: H 2 /Mn Redox Couplementioning

confidence: 99%