Hydrogen Production
The considerable use of small band gap semi-conducting materials would cause serious life cycle environmental impacts. If so, then, do we have an improved or advanced method for Photvoltaic Water Electrolysis, which remains to be both cheaper as well as environmental-friendly?
It is more than 15 years now, after realizing the fact that photo-catalytic water/air purification conditions would not remain to be applicable to photo-catalytic H2 production.
Do we still have problem in deducing the right Conceptual Model towards understanding the H2 production mechanism that designs efficient photoreactor?
TiO2 being more stable, non-corrosive, abundant, environmental-friendly and cost-effective, whether, as on date, the technology on Photo-Catalytic Water Splitting using TiO2 for H2 production (which essentially require photo-generation of hole/electron pairs, where, the reducing conduction band level electrons becomes critical) really offer a promising way for clean, low-cost and environmental-friendly production of H2 by solar energy?
Did we really receive the benefit of metal ion doping in this case?
Or
With nitrogen/sulfur (anion) doping, would it remain feasible to consider the energy levels and charge transfer with utmost care?
In such cases, whether conduction band level remains to be more negative than the H2 evolution level in order to initiate H2 production?
Or
Do we still have problem with the recombination of photo-generated electron/hole pairs, where, conduction band electrons could recombine with valence band holes, sometimes spontaneously, and release energy in the form of an unproductive heat or photons?
Do we have the right electron donor that could improve H2 production by reacting with valence band holes irreversibly in order to prohibit charge recombination?
Or
Are we still not able to arrest the quick backward reaction, as the decomposition of water into H2 & O2 remain to be energy enhancing process?
Or
Are we still not able to utilize the dominant visible light contribution from solar radiation efficiently, which significantly limits the efficiency of solar photocatalytic H2 production?
Have we still not deduced the right ‘chemical additive’ and the appropriate ‘photo-catalyst modification technique’ towards H2 production?
It is more than 10 years now after realizing the fact that PEM Electrolysis could provide a sustainable solution for the production of H2; and it remains to be well-suited to couple with energy sources including wind and solar. Where do we stand now? with reference to (a) metal loading & expensive catalysts (b) enhanced catalyst utilization (c) developing low-cost and corrosion resistant current collectors & separator plates
In such cases, can it still provide an enhanced nanoparticle dispersion, in the absence of heterogeneity, by improving the 3-phase boundary?
Suresh Kumar Govindarajan
https://home.iitm.ac.in/gskumar/
https://iitm.irins.org/profile/61643
https://www.linkedin.com/in/suresh-kumar-govindarajan-97738118/
Suresh Kumar Govindarajan
I will not be able to test my idea of producing hydrogen from water in the presence of titanium dioxide nanoparticles and therefore I am passing it on to young researchers. This problem applies to aqueous quantum materials.
Preprint Quantum nanotechnologies in water systems
Article Relationship between Classical and Quantum Mechanics in Mice...
Preprint Nuclear quantum effect in aqueous micellar surfactant solutions
- Badges
- Science topic
- Similar topics
- Papers