Results 91 to 100 of about 112,673 (326)

The Impact of Catalyst Layer Composition and Structure on Performance and Durability of PEMWE Anodes

Advanced Materials Technologies, EarlyView.
This article explores a new type of anode for water electrolysis that uses less iridium, a rare and expensive metal. By combining stable iridium oxide with platinum and carbon‐based materials, the authors create a catalyst layer that maintains strong performance.
Lena V. Bühre, Kaustubh Khedekar, Kimberly S. Reeves, Haoran Yu, Shaun M. Alia, Bryan S. Pivovar   +5 more
wiley   +1 more source

Growth of water-insoluble rutile GeO2 thin films on (001) TiO2 substrates with graded Ge x Sn1−x O2 buffer layers

Applied Physics Express
Rutile GeO _2 (r-GeO _2 ) is an ultrawide bandgap semiconductor with the potential for ambipolar doping and bulk single-crystal growth. In this study, we investigated r-GeO _2 thin films grown on (001) TiO _2 substrates with graded Ge _x Sn _1− _x O _2 ...
Kazuki Shimazoe, Temma Ogawa, Hiroyuki Nishinaka   +2 more
doaj   +1 more source

Photoemission evidence for crossover from Peierls-like to Mott-like transition in highly strained VO$_2$

, 2012
We present a spectroscopic study that reveals that the metal-insulator transition of strained VO$_2$ thin films may be driven towards a purely electronic transition, which does not rely on the Peierls dimerization, by the application of mechanical strain.
Kittiwatanakul, S., Laverock, J., Leandersson, Mats,, Lu, J. W., Lund University., Newby Jr., D., Piper, L. F. J., Preston, A. R. H., Sallis, S., Smith, K. E., Thiagarajan, Balasubramanian,, Wolf, S. A.   +11 more
core   +1 more source

Photoelectrochemical Hydrogen Production Using TiO2/Mn‐CdS Photoanode with ZnS Passivation and CoPi as Hole Transfer Relay

Advanced Sustainable Systems, EarlyView.
The electrode features TiO2 as a stable UV‐absorbing substrate, Mn‐doped CdS to extend light absorption into the visible range, ZnS to prevent CdS photocorrosion, and an outer cobalt phosphate (CoPi) that catalyzes oxygen evolution, efficiently enhancing hole transfer from the photoanode to the electrolyte.
Hwapyong Kim, Chaitanya B. Hiragond, Sung Wook Koo, Orim Lee, Su‐Il In   +4 more
wiley   +1 more source

Mechanical Properties of the Directionally Solidified Ceramic Eutectic of Al2O3/Al16Ti5O34 Phase Structure

High Temperature Materials and Processes, 2013
Al2O3/TiO2 eutectics containing 62–64 wt% Al2O3 were fabricated by a laser floating zone method. Raman spectrometry was used to determine the phase composition.
Abali Serkan, Ekerim Ahmet
doaj   +1 more source

Wide‐Range Adaptive Metal Oxide for Hydrogen Sulfide Detection From Earth to Space‐Like Environments

Advanced Science, EarlyView.
This work presents a gas sensing platform based on Cu‐doped SnO2 microspheres that operates reliably from ambient to space‐like conditions. The sensor maintains performance across vacuum and cryogenic environments, bypassing traditional oxygen‐mediated mechanisms, utilizing direct chemisorption and interfacial charge transfer.
Xi Chen, Jiaxin Chen, Yanghui Liu, Junhao Cao, Yang Yuan, Kaixin Chen, Yilang Ye, Tongshuai Yang, Yongqing Fu, Wei Luo   +9 more
wiley   +1 more source

Selective Conversion of Polyolefin Waste to Branched Alkanes via Methane‐Free Tandem Hydrocracking–Isomerization

Advanced Science, EarlyView.
Scheme illustrating the selective conversion of plastic waste to isomerized C4‐C12 products using RuSZ1 under different reaction conditions. ABSTRACT In recent years, catalytic hydrocracking has emerged as a promising waste‐to‐feedstock solution for processing plastic waste.
Xinbang Wu, Sitan Wang, Matilde Onofri, Kande Liu, Kun‐Han Lin, Roland C. Turnell‐Ritson, Li Shi, Xuan Meng, Paul J. Dyson   +8 more
wiley   +1 more source

Ultrasonic‐Assisted Photocatalytic Conversion of Air to Nitric Acid Under Ambient Conditions

Advanced Science, EarlyView.
Ultrasound‐assisted photocatalytic air oxidation to nitrate enhances soil nitrogen fertilizer dynamics, thereby enabling improved energy conversion efficiency and sustainable agriculture. ABSTRACT The production of nitric acid (HNO3) holds significant importance in the chemical industry, and achieving direct air‐to‐HNO3 conversion with high efficiency ...
Shiming Chen, Hanlan Hong, Yunchuan Tu, Chao Zhen, Rui Zheng, Yuxi Yao, Junxiong Chen, Tianlin Wang, Xiumei Zhan, Fanhe Kong, Huazhe Yang, Gang Liu   +11 more
wiley   +1 more source

Ferromagnetism at 300 K in spin-coated films of Co doped anatase and rutile TiO2

, 2004
Thin films of Ti1-xCoxO2 (x=0 and 0.03) have been prepared on sapphire substrates by spin-on technique starting from metalorganic precursors. When heat treated in air at 550 and 700 C respectively, these films present pure anatase and rutile structures ...
Chambers, Clegg, Coey, Hong, Hong, Hong, Kim, Matsumoto, Melendres, Murakami, Ogale, Ohno, Ohsaka, P. Kharel, P. Talagala, Park, Porto, R. Naik, R. Suryanarayanan, Shim, Shutthanandan, V.M. Naik, Venkatesan, Wang, Wolf   +24 more
core   +1 more source

Durable Thin‐Film Porous Transport Electrodes for High Current Density PEM Water Electrolysis

Advanced Science, EarlyView.
Water electrolysis using porous transport electrodes with sputter‐deposited, ionomer‐free thin films of rutile IrO2 catalyst suppresses Ir dissolution by >10x over other forms of IrOx. The rutile IrO2 catalyst prepared by this readily scalable electrode synthesis method provides stable cell operation at 3 A cm−2 while using low Ir loading (0.4 mg Ir cm−
James L. Young, Diana E. Beltrán, Sarah J. Blair, Ricardo P. M. Duarte, Makenzie R. Parimuha, Haoran Yu, Lonneke van Eijk, Kimberly S. Reeves, Tomas Grejtak, Jorge Martinez, Bennett A. Chao, Jacob Wrubel, Melissa E. Kreider, Elisa M. Miller, Julia D. Lenef, Karen N. Heinselman, Svitlana Pylypenko, David A. Cullen, Guido Bender   +18 more
wiley   +1 more source