Semiconductor Photocatalysis: “<i>Tell Us the Complete Story!</i>”

Kamat, Prashant V.; Jin, Song

doi:10.1021/acsenergylett.8b00196

Cited by 188 publications

(130 citation statements)

References 13 publications

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“…Therefore, we strongly suggest that the community follow standard test conditions and/or provide detailed experimental procedures for photocatalytic reactions. Moreover, it could be important to point out what are the other reaction products beside H 2 and the reduced CO 2 in a particulate photocatalysis system, because other reaction paths happened during photocatalysis could also contribute to producing the target product …”

Section: Photocatalytic Particle‐suspension Systemsmentioning

confidence: 99%

Metal Halide Perovskites for Solar‐to‐Chemical Fuel Conversion

Chen

Dong

Idriss

et al. 2019

Advanced Energy Materials

130

111

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This review article presents and discusses the recent progress made in the stabilization, protection, improvement, and design of halide perovskite‐based photocatalysts, photoelectrodes, and devices for solar‐to‐chemical fuel conversion. With the target of water splitting, hydrogen iodide splitting, and CO2 reduction reactions, the strategies established for halide perovskites used in photocatalytic particle‐suspension systems, photoelectrode thin‐film systems, and photovoltaic‐(photo)electrocatalysis tandem systems are organized and introduced. Moreover, recent achievements in discovering new and stable halide perovskite materials, developing protective and functional shells and layers, designing proper reaction solution systems, and tandem device configurations are emphasized and discussed. Perspectives on the future design of halide perovskite materials and devices for solar‐to‐chemical fuel conversion are provided. This review may serve as a guide for researchers interested in utilizing halide perovskite materials for solar‐to‐chemical fuel conversion.

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Section: Photocatalytic Particle‐suspension Systemsmentioning

confidence: 99%

Metal Halide Perovskites for Solar‐to‐Chemical Fuel Conversion

Chen

Dong

Idriss

et al. 2019

Advanced Energy Materials

130

111

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“…The low efficiency is partially due to the difficult evolution of oxygen in water splitting. A possible explanation is that a water molecule is rather stable and reluctant to donate electrons . In contrast, combination of free electrons and protons is easy for H 2 evolution.…”

Section: Discussionmentioning

confidence: 99%

Recent progress in photocatalysts for overall water splitting

Fang

2018

Int J Energy Res

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Summary Photocatalytic splitting of water with solar energy is considered as the most promising approach for the production of hydrogen fuel. However, its solar to hydrogen conversion efficiency is much below the industrial requirement (10%). This situation has stimulated intensive efforts to improve photocatalytic overall water splitting (namely, simultaneously providing unassisted oxidation and reduction of water), leading to the invention of novel catalysts in the recent years. The evaluation of these recent progresses constitutes this review article, with emphasis on the strategies employed for the development of catalysts. The catalysts were deeply reviewed and were classified into four types: (a) perovskite compounds, (b) metal oxides (sulfides and nitrides), (c) Bi‐ and In‐based materials, and (d) multicomponent catalysts. Furthermore, the challenges that remain with the process and catalysts and the potential advances were discussed as an outlook for future research.

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“…Therefore, the analysis of reactant decay and/or product growth from both reduction and oxidation reactions must be covered. Often, the yield of products is only monitored from the reduction reactions (i.e., CO, CH 4 , and/or CH 3 OH production during CO 2 reduction, and H 2 generation in water reduction), disregarding completely the oxidation reactions [41]. Figure 5 shows an example for the proposed reaction mechanism of CO 2 reduction on the surface of a Cu 2 O/TiO 2 nanocomposite in the presence of water vapor as the hole scavenger [21].…”

Section: Proposing a Meaningful Mechanismmentioning

confidence: 99%

“…Several organic molecules such as alcohols, organic acids, and hydrocarbons and inorganic ions such as sulfide (S 2− ) and sulfite (SO 3 2− ) in aqueous phase are usually employed as SEDs in different photocatalytic systems [41,42]. Organic molecules can produce C 1 products, hydrogen, etc.…”

Section: Proposing a Meaningful Mechanismmentioning

confidence: 99%

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Photocatalytic Activity: Experimental Features to Report in Heterogeneous Photocatalysis

Hoque

Guzmán

2018

Materials

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Heterogeneous photocatalysis is a prominent area of research with major applications in solar energy conversion, air pollution mitigation, and removal of contaminants from water. A large number of scientific papers related to the photocatalysis field and its environmental applications are published in different journals specializing in materials and nanomaterials. However, many problems exist in the conception of papers by authors unfamiliar with standard characterization methods of photocatalysts as well as with the procedures needed to determine photocatalytic activities based on the determination of “apparent quantum efficiencies” within a wavelength interval or “apparent quantum yields” in the case of using monochromatic light. In this regard, an astonishing number of recent research articles include claims of highly efficient (photo)catalysts or similar terms about materials with superior or enhanced efficiency for a given reaction without proper experimental support. Consequently, the comparison of the efficiencies of photocatalysts may result as being meaningless, especially when reports are only based on expressions determining (1) a reaction rate per weight of catalyst or its surface area, (2) quantum efficiencies or quantum yields, and (3) turnover frequencies or turnover numbers. Herein, we summarize the standards needed for reporting valuable data in photocatalysis and highlight some common discrepancies found in the literature. This work should inform researchers interested in reporting photocatalysis projects about the correct procedures for collecting experimental data and properly characterizing the materials by providing examples and key supporting literature.

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Semiconductor Photocatalysis: “Tell Us the Complete Story!”

Cited by 188 publications

References 13 publications

Metal Halide Perovskites for Solar‐to‐Chemical Fuel Conversion

Metal Halide Perovskites for Solar‐to‐Chemical Fuel Conversion

Recent progress in photocatalysts for overall water splitting

Photocatalytic Activity: Experimental Features to Report in Heterogeneous Photocatalysis

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