Size effect of zinc oxide-supported gold nanoparticles on the photocatalytic activity for two-electron oxygen reduction reaction

Kawano, Seina; Fujishima, Musashi; Tada, Hiroaki

doi:10.1016/j.catcom.2020.106076

Cited by 14 publications

(18 citation statements)

References 19 publications

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“…Likewise, a similar trend of size-dependent photocatalytic activity was also reported for Au/ZnO in following order: 4.9 < 6.0 < 6.6 < 9.8 nm Au size (Figure 2b) [22]. The k f of H 2 O 2 increases gradually as the Au size increases but the k d of H 2 O 2 decreases significantly (Figure 2c).…”

Section: Effects Of Au Particle Size and Loadingsupporting

confidence: 82%

Gold photocatalysis in sustainable hydrogen peroxide generation

Adnan

Jalil

2022

Preprint

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Hydrogen peroxide (H2O2) is a mild and green oxidant widely employed in organic syntheses, medical sector, disinfection, bleaching, environmental remediation and biological processes. However, its production via the expensive, multiple steps and energy intensive anthraquinone process renders it less sustainable. Photocatalysis is a viable, sustainable and promising strategy to produce H2O2 from green sources: water and molecular O2. This article presents the key developments of photocatalytic H2O2 production using gold (Au) nanoparticles supported on semiconductor photocatalysts. Several photocatalytic systems containing Au nanoparticles and the roles of Au nanoparticles in enhancing the photocatalytic H2O2 production including increasing visible light absorption, facilitating the charge carrier separation and transfer, and as a catalytic Au active site are discussed. Factors defining the photocatalytic activity such as the effects of Au particle size and loading, localised surface plasmon resonance, mixed-gold component, and design of photocatalysts are reviewed. Finally, the challenges and prospect for further developments of Au photocatalysis in sustainable H2O2 synthesis are highlighted.

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Section: Effects Of Au Particle Size and Loadingsupporting

confidence: 82%

Gold photocatalysis in sustainable hydrogen peroxide generation

Adnan

Jalil

2022

Preprint

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“…The deposition precipitation method was developed for the deposition of Au NPs on metal oxide supports. HEPI-junction-induced faceting of Au NPs has recently been reported for Au#ZnO-NWs 33 and Au#ZnO particles 34 prepared by modified deposition precipitation methods. Faceted Au NPs can also be formed on the surface of rutile TiO 2 -NR array electrode by the deposition precipitation method.…”

Section: Synthesis Of Nanohybrid Crystals With Heteroepitaxial Junctionmentioning

confidence: 97%

“…The research group of Zuo and Roy has recently reported that Au/ZnO shows photocatalytic activity for two-electron ORR much higher than Au/TiO 2 . In the Au#ZnO-photocatalyzed two-electron ORR, a very high ϕ ex of 23.8% at λ ex = 365 nm has been achieved in the presence of ethanol as a sacrificial reducing agent . The high photocatalytic activity of Au#ZnO was ascribable to the combined effects of the effective charge separation due to the efficient IFET from ZnO to Au through the high-quality interface, the electron-pool effect of Au NP, its electrocatalysis for two-electron ORR, and the nonadsorptivity of ZnO for H 2 O 2 .…”

Section: Photocatalytic Reactions By Nanohybrid Crystals With Heteroe...mentioning

confidence: 99%

“…43 The catalytic activity of Au NPs is quite sensitive to the particle shape as well as the size, which would fundamentally stem from the presence of the Au atoms with low coordinate numbers on the surface. Thus, the sharp edges and corners of faceted Au NPs formed on the TiO 2 -NW array electrode 35 and ZnO particle 34 can work as chemical hot spots to improve the catalytic activities for the OER (see section 4.3) and two-electron ORR (see section 4.4), respectively.…”

Section: Synthesis Of Nanohybrid Crystals With Heteroepitaxial Junctionmentioning

confidence: 99%

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Nanohybrid Crystals with Heteroepitaxial Junctions for Solar-to-Chemical Transformations

2020

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Nanohybrid crystals consisting of metals and semiconductors can be the key materials for the solar-to-chemical transformations including the artificial photosynthesis. For the effective interplay between the components, the construction of high-quality interface is pivotal. This feature article highlights the importance of the quality of the interface at an atomic level on the activity of nanohybrid photocatalysts. First, the recent development of the techniques for synthesizing nanohybrids with heteroepitaxial junction (HEPI) between the components is described. Second, the HEPI-junction-induced effects on the elemental steps in photocatalysis including light harvesting, interfacial charge transfer, charge separation, and surface redox reactions are discussed. Third, the applications of the nanohybrids with HEPI junction to photocatalytic multiple-electron redox reactions are dealt with. Finally, the conclusions are summarized with possible future subjects and prospects of the nanohybrid photocatalysts with HEPI junction.

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“…过渡金属氧化物是一类重要的催化剂或催化剂载体, 被广泛应用于石油、化工和环境工业等领域 [1][2][3][4][5][6][7][8][9] . 过渡金属氧化物催化剂表面结构和成份复杂, 吸附在催化剂表面的 O 2 分子可以解离成多种价态的氧: [10][11][12] .…”

Section: 引言unclassified

Study on the Reaction of Nanosized Yttrium Oxide Cluster Anions with n-Butane in the Gas Phase

Ruan¹,

Zhao²,

He³

2021

Acta Chimica Sinica

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Size effect of zinc oxide-supported gold nanoparticles on the photocatalytic activity for two-electron oxygen reduction reaction

Cited by 14 publications

References 19 publications

Gold photocatalysis in sustainable hydrogen peroxide generation

Gold photocatalysis in sustainable hydrogen peroxide generation

Nanohybrid Crystals with Heteroepitaxial Junctions for Solar-to-Chemical Transformations

Study on the Reaction of Nanosized Yttrium Oxide Cluster Anions with n-Butane in the Gas Phase

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