Over the past few decades, environmentally friendly solar energy and hydrogen storage materials have become new and important research topics. These materials have a number of applications in many scientific fields and in society. Solar energy and hydrogen storage are the most efficient ways to utilize energy and provide clean energy with potential applications in the fields of biomarkers, environmental analysis, optical sensing, etc.

Optical and hydrogen adsorption/desorption performance are vital for the application of these materials. For material designing and material preparing, it is important to take into account their properties including phase components and microstructure. Recently, many environmentally friendly solar energy and hydrogen storage materials have been developed.

The aim of this Special Issue is to publish high-quality research papers as well as review articles concerning recent research in solar energy materials, hydrogen storage materials, corrosion and protection, air pollution treatment, hydrogen purification, solar power generation, etc. Authors are encouraged to contribute original research papers and review articles reflecting the current progress in solar energy and hydrogen storage materials.

Potential topics include but are not limited to the following:

• All research aspects related to solar energy materials, solar-thermal energy, and solar absorbers
• New applications for hydrogen storage materials, hydrogen purification, and hydrogen carriers
• III-V compound semiconductor solar cells and their applications
• New developments for water and air pollution treatment, such as iron nanoparticles and materials with large surface areas
• Advanced corrosion and protection technique and polymer applications
• Technology development of Ti- and Zr- based alloy materials for hydrogen storage applications
• Process simulations and theoretical calculation/prediction