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The successful commercialization of advanced energy devices, including fuel cells and solar cells (e.g., dye-sensitized solar cells) is somewhat dependent on the cost, activity and durability of the electrocatalysts. Nowadays, precious metal electrodes are the most widely used. Accordingly, the manufacturing costs are relatively high, which constrains wide application. Recently, some reports have introduced some promising non-precious electrocatalysts to be exploited in both oxidation and reduction reactions. It was concluded that immobilization of the functional material on a proper support can distinctly improve catalytic activity. Moreover, due to the synergetic effect, metallic alloy nanoparticles show very good electrocatalytic activity in this regard. This Special Issue aims to cover the most recent progress and the advances in the field of the immobilized non-precious electrocatalysts. This includes, but is not limited to, non-precious electrocatalysts for alcohol (methanol, ethanol, etc.) oxidation, oxygen reduction reaction and electrolyte reduction in dye-sensitized solar cells.

Technology: general issues --- History of engineering & technology --- electrocatalysts --- bifunctional catalyst --- graphene --- dopants --- oxygen reduction reaction --- glassy carbon electrode --- metalloporphyrins --- Green Hydrogen --- SO2 electrolysis --- Westinghouse cycle --- carbon shell --- metallosupramolecular polymer --- hollow particles --- doping --- ethanol oxidation reaction --- palladium --- hollow carbon sphere --- alkaline medium --- dye sensitized solar cell --- SnO2-decorated graphene oxide --- counter electrode --- solar energy --- N, O-codoping --- polydopamine --- oxygen reduction --- oxygen evolution --- bifunctional --- electroactive surface area --- electrospinning --- Sn-incorporated Ni/C nanofibers --- Methanol --- Urea --- Cu3.8Ni-nanoalloy --- carbon nanofibers (NFs) --- urea oxidation --- fuel cells --- bilirubin oxidase --- direct electron transfer --- mediated electron transfer --- osmium polymer --- n/a

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The direct conversion of sunlight into electricity (photovoltaic or PV for short) is evolving rapidly, and is a technology becoming a mainstream clean energy production method. However, to compete with conventional energy production methods using fossil fuels, the conversion efficiency needs to be increased, and the manufacturing cost should be reduced further. Both of these require the improvement of solar energy materials, and the device architectures used for the conversion of light into electrical energy. This Special Issue presents the latest developments in some solar energy materials like Si, CdTe, CIGS, SnS and Perovskites), and the device structures suitable for next generation solar cells. In particular, the progress in graded bandgap multi-layer solar cells are presented in this Special Issue.

History of engineering & technology --- electroplating --- semiconductors --- large-area electronics --- characterisation --- solar cells --- perovskite solar cell --- hole blocking layer --- solution spin-coating --- TiO2/SnO2 layer --- anti-reflection coating --- potential-induced degradation --- solar cell --- plasma enhanced chemical vapor deposition --- organic solar cells --- perovskite solar cells --- encapsulation --- stability --- Cu(In,Ga)Se2 --- mini-module --- numerical simulation --- P1 shunt --- space charge region (SCR) --- TCAD --- transistor effect --- electrodeposition --- CdTe film --- two-electrode configuration --- thin films --- electroplating temperature --- photovoltaic --- CdTe --- CdS --- luminescence --- spectroscopy --- CdSe --- CdTe1−xSex --- photovoltaics --- review --- tin monosulfide --- tin disulfide --- chemical solution process --- absorber --- buffer --- renewable energy --- ethlammonium --- formamidinium --- microstructure --- perovskite --- SnS/SnS2 --- CdS/CdTe --- CIGS --- silicon --- electroplating of semiconductors

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The direct conversion of sunlight into electricity (photovoltaic or PV for short) is evolving rapidly, and is a technology becoming a mainstream clean energy production method. However, to compete with conventional energy production methods using fossil fuels, the conversion efficiency needs to be increased, and the manufacturing cost should be reduced further. Both of these require the improvement of solar energy materials, and the device architectures used for the conversion of light into electrical energy. This Special Issue presents the latest developments in some solar energy materials like Si, CdTe, CIGS, SnS and Perovskites), and the device structures suitable for next generation solar cells. In particular, the progress in graded bandgap multi-layer solar cells are presented in this Special Issue.

electroplating --- semiconductors --- large-area electronics --- characterisation --- solar cells --- perovskite solar cell --- hole blocking layer --- solution spin-coating --- TiO2/SnO2 layer --- anti-reflection coating --- potential-induced degradation --- solar cell --- plasma enhanced chemical vapor deposition --- organic solar cells --- perovskite solar cells --- encapsulation --- stability --- Cu(In,Ga)Se2 --- mini-module --- numerical simulation --- P1 shunt --- space charge region (SCR) --- TCAD --- transistor effect --- electrodeposition --- CdTe film --- two-electrode configuration --- thin films --- electroplating temperature --- photovoltaic --- CdTe --- CdS --- luminescence --- spectroscopy --- CdSe --- CdTe1−xSex --- photovoltaics --- review --- tin monosulfide --- tin disulfide --- chemical solution process --- absorber --- buffer --- renewable energy --- ethlammonium --- formamidinium --- microstructure --- perovskite --- SnS/SnS2 --- CdS/CdTe --- CIGS --- silicon --- electroplating of semiconductors

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The successful commercialization of advanced energy devices, including fuel cells and solar cells (e.g., dye-sensitized solar cells) is somewhat dependent on the cost, activity and durability of the electrocatalysts. Nowadays, precious metal electrodes are the most widely used. Accordingly, the manufacturing costs are relatively high, which constrains wide application. Recently, some reports have introduced some promising non-precious electrocatalysts to be exploited in both oxidation and reduction reactions. It was concluded that immobilization of the functional material on a proper support can distinctly improve catalytic activity. Moreover, due to the synergetic effect, metallic alloy nanoparticles show very good electrocatalytic activity in this regard. This Special Issue aims to cover the most recent progress and the advances in the field of the immobilized non-precious electrocatalysts. This includes, but is not limited to, non-precious electrocatalysts for alcohol (methanol, ethanol, etc.) oxidation, oxygen reduction reaction and electrolyte reduction in dye-sensitized solar cells.

electrocatalysts --- bifunctional catalyst --- graphene --- dopants --- oxygen reduction reaction --- glassy carbon electrode --- metalloporphyrins --- Green Hydrogen --- SO2 electrolysis --- Westinghouse cycle --- carbon shell --- metallosupramolecular polymer --- hollow particles --- doping --- ethanol oxidation reaction --- palladium --- hollow carbon sphere --- alkaline medium --- dye sensitized solar cell --- SnO2-decorated graphene oxide --- counter electrode --- solar energy --- N, O-codoping --- polydopamine --- oxygen reduction --- oxygen evolution --- bifunctional --- electroactive surface area --- electrospinning --- Sn-incorporated Ni/C nanofibers --- Methanol --- Urea --- Cu3.8Ni-nanoalloy --- carbon nanofibers (NFs) --- urea oxidation --- fuel cells --- bilirubin oxidase --- direct electron transfer --- mediated electron transfer --- osmium polymer --- n/a

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This book, entitled “Mesoporous Metal Oxide Films”, contains an editorial and a collection of ten research articles covering fundamental studies and applications of different metal oxide films. Mesoporous materials have been widely investigated and applied in many technological applications owing to their outstanding structural and physical properties. In this book, important developments in this fast-moving field are presented from various research groups around the world. Different preparation methods and applications of these novel and interesting materials have been reported, and it was demonstrated that mesoporosity has a direct impact on the properties and potential applications of such materials. The potential use of mesoporous metal oxide films and coatings with different morphology and structures is demonstrated in many technological applications, particularly chemical and electrochemical sensors, supercapacitors, solar cells, photoelectrodes, bioceramics, photonic switches, and anticorrosion agents.

SnO2 --- Metglas --- hemin --- H2O2 --- cyclic voltammetry --- magnetoelastic resonance --- sensor --- titanium dioxide --- mesoporous --- thin film --- multi-layered --- photoanode --- semiconductor --- photoelectrochemical water oxidation --- Mn2O3 --- mesoporous materials --- electrochemical characterizations --- electrode --- supercapacitors --- gadolinium oxide --- hydrazine --- p-nitrophenol --- electrochemical sensing --- amperometric --- selective sensor --- nanocrystal --- ZnO --- density of states --- optical and electrical properties --- TiO2 films --- Ag nanoparticles --- optical properties --- spectroelectrochemistry --- surface plasmon --- Fe-doped TiO2 --- hydrothermal --- GCE --- chemical sensor --- amperometry --- dye-sensitized solar cells --- working electrode --- TiO2 --- NiO nanoparticles --- electron transport --- corrosion --- guar gum --- coatings --- electrochemical impedance spectroscopy (EIS) --- SECM --- AFM --- calcium phosphate silicate --- PEG --- bioceramics --- sol-gel preparation --- hard tissue engineering --- metal oxide --- sol-gel --- supercapacitor --- photoelectrode --- dye sensitized solar cell --- NiO