GaP/GaPN core/shell nanowire array on silicon for enhanced photoelectrochemical hydrogen production

Xie, Guancai; Jan, Saad Ullah; Dong, Zejian; Dai, Yawen; Boddula, Rajender; Wei, Yongzhuang; Zhao, Chang; Qi, Xin; Wang, Jiaona; Du, Yinfang; Ma, Lan; Guo, Baochuan; Gong, Jian

doi:10.1016/s1872-2067(19)63465-0

Cited by 10 publications

(7 citation statements)

References 52 publications

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“…In various sustainable hydrogen production routes, photoelectrochemical (PEC) water splitting has drawn increasing attention since 1972 . Numerous materials, including Si, g‐C 3 N 4 , metal oxides, metal‐chalcogenides, phosphides, and perovskites, etc., have been employed for PEC water splitting. Especially, metal oxides have shown promising prospects owing to their attractive light‐harvesting ability, redox‐compatible energy levels, low cost, and high repeatability.…”

Section: Figurementioning

confidence: 99%

Acceptor‐Doping Accelerated Charge Separation in Cu₂O Photocathode for Photoelectrochemical Water Splitting: Theoretical and Experimental Studies

et al. 2020

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Cu 2 O is a typical photoelectrocatalyst for sustainable hydrogen production, while the fast charge recombination hinders its further development. Herein, Ni 2+ cations have been doped into a Cu 2 O lattice (named as Ni-Cu 2 O) by a simple hydrothermal method and act as electron traps. Theoretical results predict that the Ni dopants produce an acceptor impurity level and lower the energy barrier of hydrogen evolution. Photoelectrochemical (PEC) measurements demonstrate that Ni-Cu 2 O exhibits a photocurrent density of 0.83 mA cm À2 , which is 1.34 times higher than that of Cu 2 O. And the photostability has been enhanced by 7.81 times. Moreover, characterizations confirm the enhanced light-harvesting, facilitated charge separation and transfer, prolonged charge lifetime, and increased carrier concentration of Ni-Cu 2 O. This work provides deep insight into how acceptordoping modifies the electronic structure and optimizes the PEC process. Developing hydrogen energy plays a critical role in revolutionizing the current fossil-fuel-based energy system. [1] In various sustainable hydrogen production routes, photoelectrochemical (PEC) water splitting has drawn increasing attention since 1972. [2] Numerous materials, including Si, [3] g-C 3 N 4 , [4] metal oxides, [5] metal-chalcogenides, [6]

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Section: Figurementioning

confidence: 99%

Acceptor‐Doping Accelerated Charge Separation in Cu₂O Photocathode for Photoelectrochemical Water Splitting: Theoretical and Experimental Studies

et al. 2020

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“…The photocatalytic performance of the catalysts is related to the separation and transfer ability of the photogenerated charges. − The photocurrent response test can evaluate the charge transfer capability of the photocatalysts. As shown in Figure A, both catalysts have increased photocurrent density during the initial on/off light time, and both have different degree of decrease with increasing the response time, which may be related to the rapid photogenerated electron–hole recombination during the light exposure .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Performance of Porphyrin-Modified CuO-Co₃O₄ Heterojunction as a Photoelectrocatalyst for Methanol Oxidation

Shu

Liu

et al. 2023

Langmuir

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It is desirable to improve the methanol oxidation ability of heterojunction catalysts because of their potential in the field of electrocatalysis. In this article, we have integrated CuO/Co 3 O 4 heterojunction with porphyrin (TCPP) for TCPP/Cu 2 Co 1 . The results demonstrate that the specific surface area and electrochemical active surface area (ECSA) are enhanced, and the unblocked separation and transfer of photogenerated charges are guaranteed by the matched band energy of CuO, Co 3 O 4 , and TCPP. As such, the photocatalytic methanol oxidation reaction (MOR) performance and stability of TCPP/Cu 2 Co 1 are significantly enhanced compared with those of Cu 2 Co 1 . This study provides a promising pathway for the design of MOR catalysts with high MOR activity.

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“…24 Although Si semiconductor can absorb almost the entire solar spectrum, the planar Si displays strong light reflection. Therefore, it is necessary to construct the specific surface structures to enhance light absorption, such as Si microstructures (micropyramids, [28][29][30][31][32] microwires, [33][34][35] microporous Si 36,37 ) and nanostructures (nanopyramids, 38,39 nanowires, [40][41][42][43][44][45][46][47][48] nanopillars, [49][50][51] nanorods, 52,53 nanospheres, 54 etc.). Both the micro-and nano-structures can increase light harvesting via the multiple reflections and scattering.…”

Section: Enhancing Light Harvestingmentioning

confidence: 99%

“…Because of the rareness and preciousness, noble metals are restricted in large‐scale applications. The cost‐effective and earth‐abundant candidates to catalyze HER have been developed, such as transition metal alloy (Ni‐Mo, 90 Ni‐Fe 117 ), metal phosphides (Co 2 P, 38 GaP, 46 NiCoP, 75 MoP, 76 WP, 77 ), sulfides (MoS 2 52,54,93,123 ), selenides (NiCoSe x 49 ), and CuCo hybrid oxide 116 . Most of them act as both HER catalysts and protective layers for Si‐based photocathodes.…”

Section: Strategies For Enhancing Pec Performancementioning

confidence: 99%

Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

Cheng

Zhang

Chen

et al. 2022

Energy Science & Engineering

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Si, as a narrow bandgap semiconductor with a broadband absorption for sunlight, is considered to be a very competitive photoelectrode material for solar-driven photoelectrochemical (PEC) water splitting. However, there are major barriers in construction of efficient and stable Si-based PEC cell, including low photovoltage, sluggish reaction kinetics, and poor stability in electrolytes. This review focuses on the strategies to solve these issues and summarizes recent progress. The working principles of PEC water splitting are first introduced. Then the strategies for improving Si-based photoelectrode performances are discussed, including (1) the regulation of Si surface morphology for enhancing light harvesting, (2) band structure engineering strategies to reduce recombination of photogenerated carriers, and (3) modification of protection layers for long stability and loading cocatalysts on Si-based photoelectrodes for accelerating water splitting. Lastly, we have presented some issues of Si-based photoelectrode materials, which should be addressed in future research.

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GaP/GaPN core/shell nanowire array on silicon for enhanced photoelectrochemical hydrogen production

Cited by 10 publications

References 52 publications

Acceptor‐Doping Accelerated Charge Separation in Cu₂O Photocathode for Photoelectrochemical Water Splitting: Theoretical and Experimental Studies

Acceptor‐Doping Accelerated Charge Separation in Cu₂O Photocathode for Photoelectrochemical Water Splitting: Theoretical and Experimental Studies

Enhanced Performance of Porphyrin-Modified CuO-Co₃O₄ Heterojunction as a Photoelectrocatalyst for Methanol Oxidation

Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

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GaP/GaPN core/shell nanowire array on silicon for enhanced photoelectrochemical hydrogen production

Cited by 10 publications

References 52 publications

Acceptor‐Doping Accelerated Charge Separation in Cu2O Photocathode for Photoelectrochemical Water Splitting: Theoretical and Experimental Studies

Acceptor‐Doping Accelerated Charge Separation in Cu2O Photocathode for Photoelectrochemical Water Splitting: Theoretical and Experimental Studies

Enhanced Performance of Porphyrin-Modified CuO-Co3O4 Heterojunction as a Photoelectrocatalyst for Methanol Oxidation

Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

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Acceptor‐Doping Accelerated Charge Separation in Cu₂O Photocathode for Photoelectrochemical Water Splitting: Theoretical and Experimental Studies

Acceptor‐Doping Accelerated Charge Separation in Cu₂O Photocathode for Photoelectrochemical Water Splitting: Theoretical and Experimental Studies

Enhanced Performance of Porphyrin-Modified CuO-Co₃O₄ Heterojunction as a Photoelectrocatalyst for Methanol Oxidation