Fundamental Studies of Planar Single-Crystalline Oxide Model Electrodes (RuO2, IrO2) for Acidic Water Splitting

ACS Catalysis ◽  
2021 ◽  
pp. 8848-8871
Author(s):  
Herbert Over
Keyword(s):  
Water Splitting ◽  
Acidic Water ◽  
Single Crystalline ◽  
Crystalline Oxide

scholarly journals Sequential cocatalyst decoration on BaTaO2N towards highly-active Z-scheme water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zheng Wang ◽  
Ying Luo ◽  
Takashi Hisatomi ◽  
Junie Jhon M. Vequizo ◽  
Sayaka Suzuki ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Water Splitting ◽  
Energy Conversion Efficiency ◽  
Hydrogen Energy ◽  
Apparent Quantum Yield ◽  
Intimate Contact ◽  
Single Crystalline ◽  
Highly Active ◽  
Uniform Dispersion ◽  
Solar Hydrogen Production

AbstractOxynitride photocatalysts hold promise for renewable solar hydrogen production via water splitting owing to their intense visible light absorption. Cocatalyst loading is essential for activation of such oxynitride photocatalysts. However, cocatalyst nanoparticles form aggregates and exhibit weak interaction with photocatalysts, which prevents eliciting their intrinsic photocatalytic performance. Here, we demonstrate efficient utilization of photoexcited electrons in a single-crystalline particulate BaTaO2N photocatalyst prepared with the assistance of RbCl flux for H2 evolution reactions via sequential decoration of Pt cocatalyst by impregnation-reduction followed by site-selective photodeposition. The Pt-loaded BaTaO2N photocatalyst evolves H2 over 100 times more efficiently than before, with an apparent quantum yield of 6.8% at the wavelength of 420 nm, from a methanol aqueous solution, and a solar-to-hydrogen energy conversion efficiency of 0.24% in Z-scheme water splitting. Enabling uniform dispersion and intimate contact of cocatalyst nanoparticles on single-crystalline narrow-bandgap particulate photocatalysts is a key to efficient solar-to-chemical energy conversion.

A drastic improvement in photocatalytic H2 production by TiO2 nanosheets grown directly on Ta2O5 substrates

Nanoscale ◽  
2021 ◽  
Author(s):  
Benedict Osuagwu ◽  
Waseen Raza ◽  
Alexander Tesler ◽  
Patrik Schmuki
Keyword(s):  
Titanium Dioxide ◽  
Water Splitting ◽  
H2 Production ◽  
Single Crystalline ◽  
Photocatalytic Water Splitting ◽  
Semiconducting Material ◽  
Tio2 Nanosheets ◽  
Photocatalytic Applications

Titanium dioxide (TiO2) is the most frequently studied semiconducting material for photocatalytic water splitting. One of the favored forms of TiO2 for photocatalytic applications is layers of erected single-crystalline anatase...

Preparation of YBa2Cu3O7-δ -Coated Conductor on Single Crystalline Oxide Fiber by Hot-Wall MOCVD

1998 ◽  
pp. 623-626
Author(s):  
Masato Hasegawa ◽  
Yutaka Yoshida ◽  
Yoshiaki Ito ◽  
Morihiro Iwata ◽  
Junichi Kawashima ◽  
...  
Keyword(s):  
Coated Conductor ◽  
Single Crystalline ◽  
Oxide Fiber ◽  
Crystalline Oxide

scholarly journals Engineering of self-rectifying filamentary resistive switching in LiNbO3 single crystalline thin film via strain doping

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tiangui You ◽  
Kai Huang ◽  
Xiaomeng Zhao ◽  
Ailun Yi ◽  
Chen Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Resistive Switching ◽  
Schottky Contact ◽  
Homogeneous Distribution ◽  
Single Crystalline ◽  
Wafer Scale ◽  
Practical Applications ◽  
Crystalline Oxide ◽  
Order Of Magnitude ◽  
Switching Characteristics

AbstractThe abilities to fabricate wafer scale single crystalline oxide thin films on metallic substrates and to locally engineer their resistive switching characteristics not only contribute to the fundamental investigations of the resistive switching mechanism but also promote the practical applications of resistive switching devices. Here, wafer scale LiNbO3 (LNO) single crystalline thin films are fabricated on Pt/SiO2/LNO substrates by ion slicing with wafer bonding. The lattice strain of the LNO single crystalline thin films can be tuned by He implantation as indicated by XRD measurements. After He implantation, the LNO single crystalline thin films show self-rectifying filamentary resistive switching behaviors, which is interpreted by a model that the local conductive filaments only connect/disconnect with the bottom interface while the top interface maintains the Schottky contact. Thanks to the homogeneous distribution of defects in single crystalline thin films, highly reproducible and uniform self-rectifying resistive switching with large on/off ratio over four order of magnitude was achieved. Multilevel resistive switching can be obtained by varying the compliance current or by using different magnitude of writing voltage.

scholarly journals Porous Nanostructures: Nonequilibrium Synthesis of Highly Porous Single-Crystalline Oxide Nanostructures (Adv. Mater. Interfaces 3/2017)

2017 ◽  
Vol 4 (3) ◽  
Author(s):  
Dongkyu Lee ◽  
Xiang Gao ◽  
Lisha Fan ◽  
Er-Jia Guo ◽  
Thomas O. Farmer ◽  
...  
Keyword(s):  
Single Crystalline ◽  
Porous Nanostructures ◽  
Oxide Nanostructures ◽  
Crystalline Oxide ◽  
Highly Porous
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