Freestanding interconnected nanocluster textiles for efficient oxygen evolution reaction

Higashi, Shouichi; Tachikawa, Takashi; Oh-ishi, Keiichiro; Shigetoh, Keisuke; Takechi, Kensuke; Beniya, Atsushi

doi:10.1039/d0ta07707k

Cited by 6 publications

(7 citation statements)

References 36 publications

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“…This means that undercoordinated edge Pt atoms are less active, suggesting that the catalytic activity could be increased by minimizing the number undercoordinated edge Pt atoms via fine-tuning the edge structure of the nanocatalyst. Several interesting methods that employ physical deposition for scalable catalyst fabrication have emerged. , However, these methods require further improvement in terms of controlling the edge structure of metal nanoclusters at the atomic level, which will be key to realizing next-generation mass-efficient catalysts.…”

Section: Discussionmentioning

confidence: 99%

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Insight for Designing Mass-Efficient Metal-Oxide-Supported Heterogeneous Catalyst from the Identification of the Catalytically Active Edge Sites Using Isotopically Labeled ¹³CO and ¹⁸O₂

et al. 2022

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Identifying the catalytically active sites and determining the reaction pathways on metal-oxide-supported few-atom clusters are of great importance for realizing mass-efficient heterogeneous catalysts. However, thermodynamics-based kinetic analyses, which are usually employed to elucidate such reaction mechanisms, can lead to contradictory conclusions even for simple catalytic systems such as CO oxidation. For CO oxidation on TiO2, a typical reducible oxide, the reaction is considered to proceed using the lattice O in the oxide. However, using isotopically labeled 13CO and 18O2, we herein show that only ∼20% of the total CO2 is produced with the lattice O from TiO2; instead, most of the obtained CO2 is produced by O atoms from the introduced O2 gas adsorbed on Pt atoms in the size-specific Pt clusters deposited on TiO2. We also show that both the introduced O2 and lattice O react with CO adsorbed on hexa-coordinated Pt atoms at the edge of the Pt nanoclusters, suggesting that an edge structure that maximizes the coordination number of the edge Pt atoms could exhibit an improved catalytic activity.

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Section: Discussionmentioning

confidence: 99%

“…Several interesting methods that employ physical deposition for scalable catalyst fabrication have emerged. 7,41 However, these methods require further improvement in terms of controlling the edge structure of metal nanoclusters at the atomic level, which will be key to realizing next-generation mass-efficient catalysts.…”

Section: ■ Discussionmentioning

confidence: 99%

Insight for Designing Mass-Efficient Metal-Oxide-Supported Heterogeneous Catalyst from the Identification of the Catalytically Active Edge Sites Using Isotopically Labeled ¹³CO and ¹⁸O₂

et al. 2022

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“…The solution feed rate was maintained at 1 mL h –1 . PVP nanofibers with an average diameter of ∼270 nm were produced under these conditions. , …”

Section: Experimental Methodsmentioning

confidence: 99%

“…PVP nanofibers with an average diameter of ∼270 nm were produced under these conditions. 39,40 Sputtering. A desktop ion coater (MC1000; HITACHI High-Technologies) was used for the sputter deposition of Ag and Cu.…”

Section: ■ Experimental Methodsmentioning

confidence: 99%

Rapid Solar Heating of Antimicrobial Ag and Cu₂O Nanostructured Plasmonic Textile for Clean Water Production

Higashi

Matsui

Beniya

2022

ACS Appl. Mater. Interfaces

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Solar steam generation is an attractive method to produce clean water, and high steam generation rates have been achieved using nanostructured light absorbers. However, since it usually takes minutes to reach the temperature for steady-state steam generation under solar illumination, a material that responds quickly to intermittent sunlight is strongly desired. Here, we report an unprecedented heating rate in an ultralight freestanding textile consisting of interconnected Ag and Cu2O nanoparticles. The textile demonstrated high solar absorption with low reflectance and transmittance, which were rationalized using our multiphysics simulations. A commercial polystyrene foam wrapped with this broadband light-absorbing textile showed the fastest response to sunlight together with a good steam generation rate compared to reported inorganic nanostructured steam generators. Furthermore, the textile exhibited antibacterial property, which might lower the risk of the vapor-induced transfer of bacteria during long-term intermittent use and the cost of subsequent water sanitization.

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“…To achieve such light weight highly active catalyst, we focus on the fact that the oxide supports usually constitute over 90% of the total mass and investigate the possible way for reducing ratio of support material without sacrificing catalytic activity. In this study, we demonstrate that RuO2 nanoparticles (NPs) can be integrated into a fibrous textile with a high specific surface area without an oxide support by sputtering RuO2 on a nonwoven polymer textile 33 . The drastic improvements seen in the catalyst mass activity were achieved by avoiding the use of oxide supports, which typically account for more than 90% of the total catalyst weight 18,19,20,22,34,35,36,37 .…”

Section: Introductionmentioning

confidence: 95%

Increased Catalytic Activity of the Sabatier Reaction for Space Applications

Higashi,

Maegawa,

Goto

et al. 2024

Preprint

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Water is crucial in space missions, and developing lightweight, high-performing catalysts for water recycling is essential. Extensive research on nanosized and even single-atom catalysts supported on oxides has been conducted for this purpose. However, the oxide supports usually constitute over 90% of the total mass, so the catalysts are heavy. Here, we fabricated a light, fibrous RuO2 nanostructured textile consisting solely of RuO2 nanoparticles (NPs), which did not require an oxide support, and evaluated it in the Sabatier reaction for water recycling. Remarkably, this support-free catalyst textile displayed an unprecedented catalytic mass activity (~60 mmolCH4 h-1 gcat-1 at 160 °C), which was approximately 20 times higher than that of a previously reported Ru/TiO2 catalyst, and the highest TOF (0.021 s-1 at 160 °C). Although well-known catalyst degradation was observed during prolonged testing, the performance of the textile remained exceptional even after 46 hours of continuous operation. A detailed surface analysis unveiled phenomena such as RuO2 reduction, nanoparticle growth, surface smoothing, and Ru loss during the reaction, contributing to degradation. We expect that addressing these intrinsic and thermodynamically driven phenomena will improve activity and durability.

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Freestanding interconnected nanocluster textiles for efficient oxygen evolution reaction

Abstract: Nanocatalysts have high surface area-to-volume ratios, which are beneficial for minimizing material usage and achieving high catalytic activity. However, preparing a catalyst layer that consists of nanoparticles, involves several costly...

Cited by 6 publications

References 36 publications

Insight for Designing Mass-Efficient Metal-Oxide-Supported Heterogeneous Catalyst from the Identification of the Catalytically Active Edge Sites Using Isotopically Labeled ¹³CO and ¹⁸O₂

Insight for Designing Mass-Efficient Metal-Oxide-Supported Heterogeneous Catalyst from the Identification of the Catalytically Active Edge Sites Using Isotopically Labeled ¹³CO and ¹⁸O₂

Rapid Solar Heating of Antimicrobial Ag and Cu₂O Nanostructured Plasmonic Textile for Clean Water Production

Increased Catalytic Activity of the Sabatier Reaction for Space Applications

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Freestanding interconnected nanocluster textiles for efficient oxygen evolution reaction

Abstract: Nanocatalysts have high surface area-to-volume ratios, which are beneficial for minimizing material usage and achieving high catalytic activity. However, preparing a catalyst layer that consists of nanoparticles, involves several costly...

Cited by 6 publications

References 36 publications

Insight for Designing Mass-Efficient Metal-Oxide-Supported Heterogeneous Catalyst from the Identification of the Catalytically Active Edge Sites Using Isotopically Labeled 13CO and 18O2

Insight for Designing Mass-Efficient Metal-Oxide-Supported Heterogeneous Catalyst from the Identification of the Catalytically Active Edge Sites Using Isotopically Labeled 13CO and 18O2

Rapid Solar Heating of Antimicrobial Ag and Cu2O Nanostructured Plasmonic Textile for Clean Water Production

Increased Catalytic Activity of the Sabatier Reaction for Space Applications

Contact Info

Product

Resources

About

Insight for Designing Mass-Efficient Metal-Oxide-Supported Heterogeneous Catalyst from the Identification of the Catalytically Active Edge Sites Using Isotopically Labeled ¹³CO and ¹⁸O₂

Insight for Designing Mass-Efficient Metal-Oxide-Supported Heterogeneous Catalyst from the Identification of the Catalytically Active Edge Sites Using Isotopically Labeled ¹³CO and ¹⁸O₂

Rapid Solar Heating of Antimicrobial Ag and Cu₂O Nanostructured Plasmonic Textile for Clean Water Production