Thermalc Thermochemical water splitting (thermolysis) • Decomposition of water due to heat energy (~2500°C) • Eciency is about 50% Electricitya and solar Photo-electrochemical water
Peharz, G., Dimroth, F. & Wittstadt, U. Solar hydrogen production by water splitting with a conversion efficiency of 18%. Int.
Jia, J. et al. Solar water splitting by photovoltaic-electrolysis with a solar-to-hydrogen efficiency over 30%. Nat. Commun. 7, 13237 (2016). Goto, Y. et al. A particulate photocatalyst water-splitting panel for large-scale solar hydrogen production. Joule 2, 509–520 (2018).
In this respect, photoelectrochemical (PEC) production of hydrogen by splitting of water is a promising technology that could offer clean and cost-effective means of utilizing 36,000 TW of solar power that is available for us to exploit .
The excess clean water vapour is condensed and collected as distilled pure water. The team explored the integration of two complementary solar energy materials—a photocatalytic sheet for hydrogen production and a solar vapour generator for clean water production.
Nature Communications 7, Article number: 13237 (2016) Cite this article Hydrogen production via electrochemical water splitting is a promising approach for storing solar energy. For this technology to be economically competitive, it is critical to develop water splitting systems with high solar-to-hydrogen (STH) efficiencies.
Solar- and nuclear-driven high-temperature thermochemical water-splitting cycles produce hydrogen with near-zero greenhouse gas emissions using water and either sunlight or nuclear energy. Challenges remain, however, in the research, development, and demonstration of commercially viable thermochemical cycles and reactors:
