Journal ArticleDOI
Comprehensive view on recent developments in hydrogen evolution using MoS2 on a Si photocathode: from electronic to electrochemical aspects
TLDR
In this paper, a review of cocatalyst design for photoelectrochemical (PEC) water splitting is presented, which gives insights into the phase transformation in MoS2 during the PEC process using operando techniques.Abstract:
The generation of clean energy is necessary for future technological developments. The utilization of solar illumination to produce H2 from water electrolysis is an alternative route to address the issue. However, the reaction is a thermodynamically uphill task. Furthermore, designing a photocathode, which can use most of the incident radiation for the photoelectrochemical (PEC) reaction, plays an important role. Surface-modified p-Si can be an economically viable option. The sluggish electro-kinetics on the Si surface has been rectified with coatings of cocatalyst materials. In the current review, we have discussed the possible modifications performed on the p-Si surface to reduce the loss due to reflection and coating of the cocatalyst, e.g. MoS2 on p-Si to improve H2 evolution. The facile charge carrier kinetics at the electrode–electrolyte interface has also been discussed. The development of cocatalysts has been focused on our previous experience for two decades. From surface plasmon resonance to heteroatom doping, that is, intentional defect formation and heterostructure design, we have included a comprehensive discussion on cocatalysts. The energetics of single atom replacement and its implications for efficiency has been included. This review gives insights into the currently emerging cocatalyst design for PEC water splitting. In this regard, the review presents insights into the phase transformation in MoS2 during the PEC process using operando techniques. A discussion on the effect of single atom replacement in the inactive basal-MoS2 plane has been included.read more
Citations
More filters
Posted ContentDOI
Mixed-Phase (2H and 1T) MoS2 Catalyst for a Highly Efficient and Stable Si Photocathode
TL;DR: In this article, the mixed-phase (1T and 2H) MoS2 layers on Si as a photocathode via atomic layer deposition (ALD) for application in the photoelectrochemical (PEC) reduction of water to hydrogen.
Journal ArticleDOI
Coupling Ru-MoS2 heterostructure with silicon for efficient photoelectrocatalytic water splitting
TL;DR: In this article, a Ru-MoS2 heterostructured catalyst on a titanium (Ti) protecting p-type silicon (n+p-Si) was designed to address the low charge-separation efficiency and catalytic hydrogen evolution activity.
Journal ArticleDOI
Photoelectrochemical alcohols oxidation over polymeric carbon nitride photoanodes with simultaneous H2 production
Neeta Karjule,Ravindra S. Phatake,S. Barzilai,Biswajit Mondal,Adi Azoulay,Alexander I. Shames,Michael Volokh,Josep Albero,Hermenegildo García,Menny Shalom +9 more
TL;DR: In this article , the authors demonstrate the synthesis of value-added aldehydes and carboxylic acids with clean hydrogen (H2) production in water using a photoelectrochemical cell based solely on polymeric carbon nitride (CN) as the photoanode.
Journal ArticleDOI
Pulsed Laser Phosphorus Doping and Nanocomposite Catalysts Deposition in Forming a-MoSx/NP-Mo//n+p-Si Photocathodes for Efficient Solar Hydrogen Production
TL;DR: In this paper , a-MoSx/NP-Mo films (4 and 20 nm thickness) were used to produce hydrogen by photo-stimulated HER using a p-Si cathode.
Journal ArticleDOI
Electrochemical Deposition of Si Nano-spheres from Water Contaminated Ionic Liquid at Room Temperature: Structural Evolution and Growth Mechanism
TL;DR: In this paper , a two-step process is involved for the electro-reduction of Si4+ to elemental Si, and the electrodeposition takes place in the over-potential domain at −1.5 V (vs. Pt) for both the working substrates.
References
More filters
Journal Article
Photoelectrochemical cells : Materials for clean energy
TL;DR: In this paper, the authors look into the historical background, and present status and development prospects for photoelectrochemical cells, based on nanocrystalline materials and conducting polymer films.
Journal ArticleDOI
Solar Water Splitting Cells
Michael G. Walter,Emily L. Warren,James R. McKone,Shannon W. Boettcher,Qixi Mi,Elizabeth A. Santori,Nathan S. Lewis +6 more
TL;DR: The biggest challenge is whether or not the goals need to be met to fully utilize solar energy for the global energy demand can be met in a costeffective way on the terawatt scale.
Journal ArticleDOI
Hydrogen-storage materials for mobile applications
TL;DR: Recent developments in the search for innovative materials with high hydrogen-storage capacity are presented.
Journal ArticleDOI
Biomimetic Hydrogen Evolution: MoS2 Nanoparticles as Catalyst for Hydrogen Evolution
Berit Hinnemann,Poul Georg Moses,Jacob Lindner Bonde,Kristina Pilt Jørgensen,Jane Hvolbæk Nielsen,Sebastian Horch,Ib Chorkendorff,Jens K. Nørskov +7 more
TL;DR: The ability of different metal surfaces and of the enzymes nitrogenase and hydrogenase to catalyze the hydrogen evolution reaction is analyzed and a necessary criterion for high catalytic activity is found: that the binding free energy of atomic hydrogen to the catalyst is close to zero.
Journal ArticleDOI
Solar Water Splitting: Progress Using Hematite (α‐Fe2O3) Photoelectrodes
TL;DR: The latest efforts using advanced characterization techniques, particularly electrochemical impedance spectroscopy, are presented to define the obstacles that remain to be surmounted in order to fully exploit the potential of hematite for solar energy conversion.