In situ measurement of photostability of CdSe/CdS/ZnO nanowires photoelectrode for photoelectrochemical water splitting

Choi, Youngjin; Yim, Changyong; Baek, Seunghyeon; Choi, Mingi; Jeon, Sangmin; Yong, Kijung

doi:10.1016/j.snb.2015.06.092

Cited by 22 publications

(12 citation statements)

References 34 publications

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“…In a typical example, Choi et al prepared CdSe/CdS/ZnO nanowire arrays as PEC photoanodes using a quartz crystal microbalance (QCM) as a platform, with simultaneous mass analysis. 67 The SEM image showed that the structure of the CdSe/CdS/ZnO photoanode was destroyed aer the water splitting reaction, which was due to the anodic photocorrosion of QDs (Fig. 4c and d).…”

Section: àmentioning

confidence: 99%

Semiconductor-based photocatalysts for photocatalytic and photoelectrochemical water splitting: will we stop with photocorrosion?

et al. 2020

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Section: àmentioning

confidence: 99%

Semiconductor-based photocatalysts for photocatalytic and photoelectrochemical water splitting: will we stop with photocorrosion?

et al. 2020

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“…[100][101][102][103] Similarly, Yong and co-workers also explicitly designed aligned heterostructure NAs for various optical applications. [104][105][106][107][108][109] Later, our research group has focused on the design of highly aligned pristine heterostructure NAs for sensing, water splitting, and piezoelectric applications. [10,42,54,90,110,111]…”

Section: Aligned Nas Materialsmentioning

confidence: 99%

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

et al. 2021

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Solar energy conversion is considered to be one of the promising alternatives to fossil fuels. The photoelectrochemical (PEC) water splitting into hydrogen and oxygen is a prominent approach to utilize solar energy to produce clean hydrogen energy. In PEC water splitting, semiconductors play a central role for absorbing the solar radiations in the UV‐visible region and generating electron‐hole pairs that contribute to water splitting. This review provides an extensive overview of the 1D aligned nanoarrays (1D‐NAs) and their architectures as photoactive materials. 1D‐NAs can be in the form of nanorods (NRs), nanowires (NWs), nanopencils, and nanotubes (NTs), etc. The initial part of the review is dedicated to the synthesis and characterizations of the 1D‐NAs, which is followed by useful synthetic protocols explicitly employed for the synthesis of NAs morphologies and the mechanisms involved in PEC water splitting. The final section of the review provides examples of highly anticipated TiO2, ZnO, BiVO4‐based, and other miscellaneous aligned NAs utilized for PEC water splitting. The PEC water splitting performance of aligned NAs is compared with other morphologies in terms of photocurrent densities. In this review, it is attempted to provide an account of state‐of‐the‐art stable, novel, and low‐cost aligned photoactive materials for PEC water splitting.

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“…Choi et al provedt hat the passivationc oating or the applicationo f hole scavengingc atalyst can suppress the photocorrosion of CdS and CdSe. [36] Enhanceds tability of the CIGS photocathode by TiO 2 ALD passivation To enhancethe stability of the photocathode, CdS/CIGS surface was modified with aT iO 2 coating. TiO 2 is av ery suitablec andidate material for protecting the photocathode because, according to the Pourbaixdiagram, TiO 2 phase stays stable under all pH conditions from 0t o1 4w ithin the redox potential of water splitting.…”

Section: Pec Performances and Stability Test Of The Cigs Photocathodementioning

confidence: 99%

Enhancing Durability and Photoelectrochemical Performance of the Earth Abundant Ni–Mo/TiO₂/CdS/CIGS Photocathode under Various pH Conditions

et al. 2018

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Cu(In,Ga)(S,Se) (CIGS) is a promising photocathode material owing to its high absorption coefficient, adjustable band gap, and suitable band edge for the hydrogen evolution reaction (HER). However, most CIGS photocathodes have suffered from instability in applications that require a wide range of pH conditions and have utilized noble metal HER catalysts to achieve a high performance. Thus, improving the durability of the CIGS photocathode under various pH conditions and developing a cost-effective non-noble metal catalyst are critical issues in the photoelectrochemical (PEC) application of this promising photocathode material. Here, we catalyze the CIGS photocathode with Ni-Mo as a non-noble metal to enhance the PEC efficiency, and we employ atomically grown TiO to passivate the CdS/CIGS surface and improve the stability under a wide range of pH conditions. Our Ni-Mo alloy exhibits the best HER catalytic activity among reported earth-abundant HER catalysts in both acidic and alkaline solutions. The Ni-Mo/CdS/CIGS photocathode yields an onset potential of 0.5 V (vs. RHE) and a short-circuit photocurrent density as high as 15-25 mA cm under various pH conditions ranging from 0.4 to 14, which is highly comparable to that of Pt/CdS/CIGS. Furthermore, the passivation of CdS/CIGS with a thin TiO layer, obtained by atomic layer deposition, effectively prevents the photocorrosion of CdS and the dissolution of the Mo back contact, which are the main causes of the degradation of the photocathode. The optimized Ni-Mo/TiO /CdS/CIGS photocathode produces a stable photocurrent density at 0 V for 100 minutes except under strong alkaline conditions. The current work presents a very useful method to improve the efficiency and durability of the CIGS photocathodes with an earth-abundant metal catalyst, which completely replaces Pt.

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In situ measurement of photostability of CdSe/CdS/ZnO nanowires photoelectrode for photoelectrochemical water splitting

Cited by 22 publications

References 34 publications

Semiconductor-based photocatalysts for photocatalytic and photoelectrochemical water splitting: will we stop with photocorrosion?

Semiconductor-based photocatalysts for photocatalytic and photoelectrochemical water splitting: will we stop with photocorrosion?

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

Enhancing Durability and Photoelectrochemical Performance of the Earth Abundant Ni–Mo/TiO₂/CdS/CIGS Photocathode under Various pH Conditions

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In situ measurement of photostability of CdSe/CdS/ZnO nanowires photoelectrode for photoelectrochemical water splitting

Cited by 22 publications

References 34 publications

Semiconductor-based photocatalysts for photocatalytic and photoelectrochemical water splitting: will we stop with photocorrosion?

Semiconductor-based photocatalysts for photocatalytic and photoelectrochemical water splitting: will we stop with photocorrosion?

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

Enhancing Durability and Photoelectrochemical Performance of the Earth Abundant Ni–Mo/TiO2/CdS/CIGS Photocathode under Various pH Conditions

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Enhancing Durability and Photoelectrochemical Performance of the Earth Abundant Ni–Mo/TiO₂/CdS/CIGS Photocathode under Various pH Conditions