Fundamental aspects of photoelectrochemical water splitting at semiconductor electrodes
نویسندگان
چکیده
Fundamental aspects of light-driven water splitting are reviewed with emphasis on the kinetics and mechanism oxygen hydrogen evolution reactions at semiconductor photoelectrodes. Information provided by in operando techniques is discussed related to mechanisms catalysis.
منابع مشابه
Photoelectrochemical activity of as-grown, α-Fe2O3 nanowire array electrodes for water splitting.
Undoped hematite nanowire arrays grown using plasma oxidation of iron foils show significant photoactivity (~0.38 mA cm(-2) at 1.5 V versus reversible hydrogen electrode in 1 M KOH). In contrast, thermally oxidized nanowire arrays grown on iron exhibit no photoactivity due to the formation of a thick (>7 μm Fe(1-x)O) interfacial layer. An atmospheric plasma oxidation process required only a few...
متن کاملEfficiency limits for photoelectrochemical water-splitting
Theoretical limiting efficiencies have a critical role in determining technological viability and expectations for device prototypes, as evidenced by the photovoltaics community's focus on detailed balance. However, due to their multicomponent nature, photoelectrochemical devices do not have an equivalent analogue to detailed balance, and reported theoretical efficiency limits vary depending on...
متن کاملPhotoelectrochemical Tandem Cell with Bipolar Dye-Sensitized Electrodes for Vectorial Electron Transfer for Water Splitting
Direct water electrolysis was achieved with a novel monolithic photoelectrochemical cell. Bipolar WO3/Pt and dye-sensitized TiO2/Pt semiconductor panels, capable of vectorial electron transfer, have been used for water splitting to yield hydrogen and oxygen; light is the only energy input. The hydrogen production efficiency of this tandem cell, based on the short-circuit current, was 1.9% and t...
متن کاملPhotoelectrochemical water splitting enhanced by self-assembled metal nanopillars embedded in an oxide semiconductor photoelectrode
Production of chemical fuels by direct solar energy conversion in a photoelectrochemical cell is of great practical interest for developing a sustainable energy system. Various nanoscale designs such as nanowires, nanotubes, heterostructures and nanocomposites have been explored to increase the energy conversion efficiency of photoelectrochemical water splitting. Here we demonstrate a self-orga...
متن کاملForming heterojunctions at the nanoscale for improved photoelectrochemical water splitting by semiconductor materials: case studies on hematite.
In order for the future energy needs of humanity to be adequately and sustainably met, alternative energy techniques such as artificial photosynthesis need to be made more efficient and therefore commercially viable. On a grand scale, the energies coming to and leaving from the earth are balanced. With the fast increasing waste heat produced by human activities, the balance may be shifted to th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Current opinion in green and sustainable chemistry
سال: 2021
ISSN: ['2452-2236']
DOI: https://doi.org/10.1016/j.cogsc.2021.100505