Bifunctional photothermal effect to promote band bending and water oxidation kinetics for improving photoelectrochemical water splitting

Cai, Jiajia; Tang, Xiangxuan; Liu, Cunxing; Li, Yongjun; Kong, Lingna; Wang, Jiansheng; Li, Haijin; Xie, Qian; Wang, Jianmin; Song, Li

doi:10.1016/j.solmat.2023.112360

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…CQDs, as typical carbon-based photothermal materials, can effectively convert the energy of near-infrared light into local heat and are the most widely used photothermal materials in carbon-based materials [123] . Hu et al prepared Co-Pi/CQDs/Fe 2 O 3 /TiO 2 photoelectrodes using Fe 2 O 3 /TiO 2 as the main photocatalyst material by combining CQDs and other materials [124] . Under the irradiation of 808 nm near-infrared light, the platform temperature of Co-Pi/CQDs/Fe 2 O 3 /TiO 2 can reach 42 °C, indicating that CQDs have high photothermal conversion efficiency.…”

Section: Carbon-based Materialsmentioning

confidence: 99%

Photothermal effect and application of photothermal materials in photocatalysis and photoelectric catalysis

Zhang,

Tang,

Yang

et al. 2024

Microstructures

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Photocatalysis (PC) and photoelectric catalysis (PEC) are environmental protection technologies that use sunlight capacity and environmental governance, and they have a wide range of applications in hydrogen production, carbon dioxide reduction, organic degradation, and other fields. When the light is irradiated on the material, part of the light energy will be converted into heat energy, and the combination of this part of the heat energy with PC and PEC will become an important way to improve optical performance. Compared with traditional technology, the synergistic effect of light and heat can obtain higher catalytic performance and improve energy utilization efficiency. This review begins with an overview of the principle of photoheat generation, which produces heat energy in a non-radiative process through photo-induced instability of electrons. The principle of thermal effect on the performance improvement of PC/PEC is analyzed from the dynamics and thermodynamics of photoreaction and electric reaction. On this basis, several materials widely used at present are listed, such as oxides, plasmas, conductive polymers, carbon materials, and other typical photothermal materials. The specific applications of photothermal materials in PC and PEC processes, such as hydrogen production by oxidation, carbon dioxide reduction, organic matter reduction, and seawater desalination, were discussed. Finally, the challenges to PC/PEC from the introduction of thermal effects are further discussed to provide a clean and sustainable way to build a carbon-neutral society.

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Section: Carbon-based Materialsmentioning

confidence: 99%

Photothermal effect and application of photothermal materials in photocatalysis and photoelectric catalysis

Zhang,

Tang,

Yang

et al. 2024

Microstructures

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“…[3][4][5] Nevertheless, the PEC conversion efficiency of an α-Fe 2 O 3 photoanode is limited by its low conductivity, severe charge recombination efficiency and sluggish surface kinetics. [6][7][8][9] Various methods have been developed to tackle the aforementioned drawbacks, including the introduction of passivation layers, 10,11 secondary annealing, 12 deposition of co-catalysts, [13][14][15] etc. In addition to these, the spatial distribution of the Fe and O elements has been proved to play important roles in the semiconductor bulk charge transport and surface water oxidation properties, and hence the PEC performances.…”

Section: Introductionmentioning

confidence: 99%

“…3–5 Nevertheless, the PEC conversion efficiency of an α-Fe 2 O 3 photoanode is limited by its low conductivity, severe charge recombination efficiency and sluggish surface kinetics. 6–9…”

Section: Introductionmentioning

confidence: 99%

Composition modulation of a hematite photoanode for highly efficient photoelectrochemical water oxidation

Wang,

Lin,

Cao

et al. 2024

CrystEngComm

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Ge‐Doped Hematite with FeCoNi‐B_i as Cocatalyst for High‐Performing Photoelectrochemical Water Splitting

Wang,

Cui,

Tian

et al. 2024

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Hematite is a promising photoanode material for photoelectrochemical water‐splitting technology. However, the low current density associated with the low conductivity, low charge carrier mobility, and poor oxygen evolution catalytic activity is a challenging issue for the material. In this study, the challenge is addressed by introducing Germanium (Ge) doping, coupled with the use of FeCoNi‐Bi as a co‐catalyst. Ge doping not only increases the conductivity and charge carrier concentration of the hematite photoanode, but also induces nanopores, thereby expanding its electrochemical reactive surface area to facilitate the oxygen evolution reaction. In the meantime, the FeCoNi‐Bi cocatalyst electrodeposited onto the surface of Ge‐doped hematite, improves the oxygen evolution reaction performance. As a result, the obtained photoanode achieves a photocurrent density of 2.31 mA cm−2 at 1.23 VRHE, which is three times higher than that of hematite (0.72 mA cm−2). Moreover, a new analytical method is introduced to scrutinize both the positive and negative effects of Ge doping and FeCoNi‐Bi cocatalyst on the photoanode performance by decoupling the photoelectrochemical process steps. Overall, this study not only enhances the performance of hematite photoanodes but also guides their rational design and systematic assessment.

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Bifunctional photothermal effect to promote band bending and water oxidation kinetics for improving photoelectrochemical water splitting

Cited by 7 publications

References 32 publications

Photothermal effect and application of photothermal materials in photocatalysis and photoelectric catalysis

Photothermal effect and application of photothermal materials in photocatalysis and photoelectric catalysis

Composition modulation of a hematite photoanode for highly efficient photoelectrochemical water oxidation

Ge‐Doped Hematite with FeCoNi‐B_i as Cocatalyst for High‐Performing Photoelectrochemical Water Splitting

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Bifunctional photothermal effect to promote band bending and water oxidation kinetics for improving photoelectrochemical water splitting

Cited by 7 publications

References 32 publications

Photothermal effect and application of photothermal materials in photocatalysis and photoelectric catalysis

Photothermal effect and application of photothermal materials in photocatalysis and photoelectric catalysis

Composition modulation of a hematite photoanode for highly efficient photoelectrochemical water oxidation

Ge‐Doped Hematite with FeCoNi‐Bi as Cocatalyst for High‐Performing Photoelectrochemical Water Splitting

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Ge‐Doped Hematite with FeCoNi‐B_i as Cocatalyst for High‐Performing Photoelectrochemical Water Splitting