Recent progress in photocatalysts for overall water splitting

Fang, Siyuan; Hu, Yun Hang

doi:10.1002/er.4259

Cited by 80 publications

(48 citation statements)

References 146 publications

(446 reference statements)

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“…Functional materials in the solar energy conversion systems should effectively absorb light and generate electrical power. [30][31][32][33][34] For example, dye-sensitized solar cells employ molecular dyes for solar energy capture and metal oxides for electron extraction. Dye-and quantum dot-sensitized water-splitting systems are developed to produce hydrogen fuel, where the photoelectrode materials require desired light harvesting and charge transfer properties.…”

Section: Energy Conversion and Storage Systemsmentioning

confidence: 99%

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Zhang

Chen

2020

Int J Energy Res

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Summary Polyoxometalates could be viewed as the molecular counterpart of the metal oxides, which are essential ingredients for various energy conversion and storage applications. In this manuscript, we review the progress of engineering functional polyoxometalates toward energy applications, focusing on, but not limited to, polyoxotitanate, polyoxotungstate, and polyoxomolybdate. These polyoxometalates are considered to be promising candidates for dye‐sensitized solar cell, perovskite solar cell, lithium‐ion battery, lithium‐sulfur battery, supercapacitor, and water‐splitting system. We believe advanced energy devices with better performance could be derived from further engineering the polyoxometalates owing to their molecular design flexibility.

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Section: Energy Conversion and Storage Systemsmentioning

confidence: 99%

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Zhang

Chen

2020

Int J Energy Res

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“…These inorganic materials exhibit high stability in general but tend to have relatively large bandgaps, which limit the harvest of solar energy to a portion of the UV region. [143] Graphitic carbon nitride, C 3 N 4 , is a promising material, considering its narrow bandgap of 2.7 eV. [142] On the other hand, metal nitrides with d 10 electronic configuration (Ge 4+ , Sn 4+ , In 3+ ) have a higher valence band and thus a smaller bandgap than other metal oxides.…”

Section: Hydrogen Production By Water Splittingmentioning

confidence: 99%

“…[142] On the other hand, metal nitrides with d 10 electronic configuration (Ge 4+ , Sn 4+ , In 3+ ) have a higher valence band and thus a smaller bandgap than other metal oxides. [143] Graphitic carbon nitride, C 3 N 4 , is a promising material, considering its narrow bandgap of 2.7 eV. [144] Wang et.al reported the successful evolution of hydrogen using this material.…”

Section: Hydrogen Production By Water Splittingmentioning

confidence: 99%

Research Frontiers in Energy‐Related Materials and Applications for 2020–2030

Blay

Galian

Mureşan

et al. 2020

Advanced Sustainable Systems

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structure was found for the first time in a mineral composed by CaTiO 3 in 1839. Since then, multiple metal oxide perovskites (AMO 3 ) were developed, which have interesting properties for ferroelectric, superconductive, and pyroelectric applications. Metal halide perovskites (X is a halide anion such as Cl − , Br − , or I − ), which were developed later, display promising semiconducting properties. In particular, lead halide perovskites (APbX 3 ) are the most widely studied perovskite composition and are classified according to the A cation into hybrid perovskites (methylammonium bromide, MA or formamidinium, FA) and all-inorganic perovskites (cesium, Cs). [2] The electronic properties of the perovskites are related to the M-X bond, while the size of the A cation can introduce crystal distortion and change the symmetry of the ideal cubic crystal structure. [3] Interestingly, by using a large A organic cation, low-dimensional halide perovskites can be formed, including 2D sheets, 1D chains, or 0D clusters. [4] Lead halide perovskites are revolutionizing photovoltaic technology thank to their outstanding optical and electronic properties, low cost, and simple preparation. Compared to silicon-based technology, perovskites are prepared from more abundant and low-cost precursors. The superior performance and high efficiency of perovskite-based solar cells (PSC) are due to i) high optical absorption coefficient, ii) long carrier diffusion length This article delineates the state of the art for several materials used in the harvest, conversion, and storage of energy, and analyzes the challenges to be overcome in the decade ahead for them to reach the market and benefit society. The materials covered have had a special interest in recent years and include perovskites, materials for batteries and supercapacitors, graphene, and materials for hydrogen production and storage. Looking at the common challenges for these different systems, scientists in basic research should carefully consider commercial requirements when designing new materials. These include cost and ease of synthesis, abundance of precursors, recyclability of spent devices, toxicity, and stability. Improvements in these areas deserve more attention, as they can help bridge the gap for these technologies and facilitate the creation of partnerships between academia and industry. These improvements should be pursued in parallel with the design of novel compositions, nanostructures, and devices, which have led most interest during the past decade. Research groups are encouraged to adopt a cross-disciplinary mindset, which may allow more efficient use of existing knowledge and facilitate breakthrough innovation in both basic and applied research of energy-related materials.

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“…However, the purity of hydrogen produced by these methods is low, and a large amount of fossil materials are needed. Therefore, new technologies for hydrogen production from water, including photocatalytic water splitting and electrolysis of water, [4][5][6][7] are attracting wide attention. However, the low conversion efficiency of light limits the development of photocatalytic water splitting.…”

Section: Introductionmentioning

confidence: 99%

Construction of hollow structure cobalt iron selenide polyhedrons for efficient hydrogen evolution reaction

et al. 2020

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The development of highly active, robust and cost-effective noble metal-free electrocatalysts for hydrogen evolution reaction (HER) in alkaline solution remains a severe challenge. In this work, a hollow structure CoSe 2-FeSe 2 heterojunction electrocatalyst (denoted by "(Co,Fe)Se 2 ") was designed by a simple anion exchange reaction and selenization. Benefiting from the unique hollow structure, the (Co,Fe)Se 2 catalyst accelerates diffusion of electrolyte, besides, the CoSe 2-FeSe 2 heterojunction could provide rapid interfacial charge transportation and more active sites for the HER reaction. The (Co,Fe)Se 2 electrode material exhibits good performance for HER in 1 M KOH electrolyte. It needs an overpotential of 124 mV to obtain a current density of 10 mA cm −2 , and the Tafel slope is 65 mV dec −1. Besides, (Co,Fe)Se 2 has a smaller charge transfer resistance compared with CoSe 2. At the same time, it has relatively large electrochemical active surface area due to the porosity. Most importantly, the (Co,Fe)Se 2 electrode displays good stability in alkaline conditions for 15 hours, the linear sweep voltammetry curves are almost coincident before and after 1000 cycles, the overpotential with current density of 10 mA cm −2 increased by only 9.76% after 5000 cycles of CV. It shows great application potential in HER.

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Recent progress in photocatalysts for overall water splitting

Cited by 80 publications

References 146 publications

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Research Frontiers in Energy‐Related Materials and Applications for 2020–2030

Construction of hollow structure cobalt iron selenide polyhedrons for efficient hydrogen evolution reaction

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