Photocatalytic Overall Water Splitting Promoted by Two Different Cocatalysts for Hydrogen and Oxygen Evolution under Visible Light

Maeda, Kazuhiko; Xiong, Anke; Yoshinaga, Taizo; Ikeda, Teruaki; Sakamoto, Naoyuki; Hisatomi, Takashi; Takashima, Masaki; Lu, Daling; Kanehara, Masayuki; Setoyama, Tohru; Teranishi, Toshiharu; Domen, Kazunari

doi:10.1002/anie.201001259

Cited by 366 publications

(198 citation statements)

References 25 publications

(14 reference statements)

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“…In the work on H 2 production from photocatalytic splitting of H 2 S (H 2 S → H 2 + S), the activity of Pt-PdS/CdS was even greater than that for the simple sum of Pt/CdS and PdS/CdS [32]. A similar case was reported by Zhang et al [33] compared with that using catalysts modified with Rh, Pt or Ag 2 S. This strategy has also been applied to GaN : ZnO co-loaded with Rh/Cr 2 O 3 and Mn 3 O 4 , which shows an enhancement in water splitting activity [34]. Reece et al [2] reported that solar water splitting at an efficiency of 2.5 per cent was achieved for a cell consisting of a triple junction, amorphous silicon photovoltaic interfaced to hydrogen-and oxygen-evolving catalysts.…”

Section: (D) Dual Cocatalyst For Reduction and Oxidation Half Reactionssupporting

confidence: 65%

Roles of cocatalysts in semiconductor-based photocatalytic hydrogen production

Yang

Yan

Zong

et al. 2013

Phil. Trans. R. Soc. A.

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A photocatalyst is defined as a functional composite material with three components: photo-harvester (e.g. semiconductor), reduction cocatalyst (e.g. for hydrogen evolution) and oxidation cocatalyst (e.g. for oxidation evolution from water). Loading cocatalysts on semiconductors is proved to be an effective approach to promote the charge separation and transfer, suppress the charge recombination and enhance the photocatalytic activity. Furthermore, the photocatalytic performance can be significantly improved by loading dual cocatalysts for reduction and oxidation, which could lower the activation energy barriers, respectively, for the two half reactions. A quantum efficiency (QE) as high as 93 per cent at 420 nm for H 2 production has been achieved for Pt–PdS/CdS, where Pt and PdS, respectively, act as reduction and oxidation cocatalysts and CdS as a photo-harvester. The dual cocatalysts work synergistically and enhance the photocatalytic reaction rate, which is determined by the slower one (either reduction or oxidation). This work demonstrates that the cocatalysts, especially the dual cocatalysts for reduction and oxidation, are crucial and even absolutely necessary for achieving high QEs in photocatalytic hydrogen production, as well as in photocatalytic water splitting.

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Section: (D) Dual Cocatalyst For Reduction and Oxidation Half Reactionssupporting

confidence: 65%

Roles of cocatalysts in semiconductor-based photocatalytic hydrogen production

Yang

Yan

Zong

et al. 2013

Phil. Trans. R. Soc. A.

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“…Charge separation in photocatalyst particles must proceed within the timescales of photoexcited carrier recombinations to drive efficient water splitting. The photocatalyst particles are often modified with noble metal or metal oxide nanoparticles (cocatalysts) [7][8][9]. The cocatalysts facilitate charge separation by creating new cocatalyst-semiconductor interfaces, which extends the lifetime of photoexcited carriers and enhances electrocatalytic activity, minimizing the overpotential of the water redox reactions.…”

Section: Energy Diagrammentioning

confidence: 99%

“…The investigation of photocatalytic and photoelectrochemical methods for oxygen evolution utilizes the oxide forms of Co [30], Ru [31], Mn [9,31], and Ir [31,32]. The theoretical analysis predicted the following ordering of catalytic activities for the following perovskite-type oxides: 3 .…”

Section: Electrocatalytic Hydrogen and Oxygen Evolution Reactionsmentioning

confidence: 99%

Photocatalytic Water-Splitting Reaction from Catalytic and Kinetic Perspectives

2014

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Some particulate semiconductors loaded with nanoparticulate catalysts exhibit photocatalytic activity for the water-splitting reaction. The photocatalysis is distinct from the thermal catalysis because photocatalysis involves photophysical processes in particulate semiconductors. This review article presents a brief introduction to photocatalysis, followed by kinetic aspects of the photocatalytic water-splitting reaction.

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“…194 They recently demonstrated a new concept of using GaN : ZnO loaded with Rh/Cr 2 O 3 (core/shell) and Mn 3 O 4 nanoparticles as H 2 and O 2 evolution promoters, respectively, under irradiation with visible light. 195 TaON-based photocatalysts have also been demonstrated to be active for hydrogen generation from water under visible light irradiation. 196,197 CdS has also been widely studied as a photocatalyst to generate solar hydrogen.…”

mentioning

confidence: 99%

Nanomaterials for renewable energy production and storage

et al. 2012

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Over the past decades, there have been many projections on the future depletion of the fossil fuel reserves on earth as well as the rapid increase in green-house gas emissions. There is clearly an urgent need for the development of renewable energy technologies. On a different frontier, growth and manipulation of materials on the nanometer scale have progressed at a fast pace. Selected recent and significant advances in the development of nanomaterials for renewable energy applications are reviewed here, and special emphases are given to the studies of solar-driven photocatalytic hydrogen production, electricity generation with dye-sensitized solar cells, solidstate hydrogen storage, and electric energy storage with lithium ion rechargeable batteries.

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Photocatalytic Overall Water Splitting Promoted by Two Different Cocatalysts for Hydrogen and Oxygen Evolution under Visible Light

Cited by 366 publications

References 25 publications

Roles of cocatalysts in semiconductor-based photocatalytic hydrogen production

Roles of cocatalysts in semiconductor-based photocatalytic hydrogen production

Photocatalytic Water-Splitting Reaction from Catalytic and Kinetic Perspectives

Nanomaterials for renewable energy production and storage

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