Results 41 to 50 of about 1,075 (171)

Low‐Potential Electrooxidation of Lignin Model Compounds Through Brønsted Based‐Controlled Cu/TEMPO Mediation

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Selective electrochemical (E) oxidation of lignin, due to its complex and heterogeneous structure, remains a significant challenge in its valorization. 2,2,6,6‐Tetramethylpiperidine‐1‐oxyl (TEMPO)‐mediated systems have shown promise, but their relatively high oxidation potentials and limited applicability to structurally diverse alcohols hinder broader
Min Jae Kim, Junbeom Park, Youngeun Kim, Jaemin Park, Haein Cho, Chun-Jae Yoo, Ho Seok Park, Kwang Ho Kim, Wooseok Yang, Cheng Du   +9 more
wiley   +1 more source

Autodrop‐Enabled Aqueous Deposition of BiVO4–FePO4 Photoanodes for Stable Water Splitting

Advanced Materials Technologies, Volume 10, Issue 21, November 6, 2025.
This study presents the Autodrop method, an automated SILAR process, for fabricating BiVO4−FePO4 photoanodes. The study focuses on the effect of the preparation parameters on the properties of BiVO4. The method improves film uniformity and preparation time. Photoanodes are optimized for OER activity with the addition of FePO4, achieving higher and more
Roberto Altieri, Matteo Crisci, Derck Schlettwein, Bernd Smarsly, Francesco Lamberti, Teresa Gatti, Mengjiao Wang   +6 more
wiley   +1 more source

Actuation and Charging Mechanisms of Thin PEDOT:PSS Films Probed by Electrochemical AFM and Impedance Spectroscopy

Journal of Polymer Science, Volume 63, Issue 21, Page 4661-4672, 1 November 2025.
The actuation of thin films of PEDOT:PSS has been characterized by electrochemical AFM. A relative decrease in the actuation behavior in dependence of the film thickness has been observed. The underlying mechanisms have been elucidated by chronoamperometry and electrochemical impedance spectroscopy. The decreasing relative actuation is attributed to an
Tamino Rößler, Matthias B. Engelhardt, Nicolas Helfricht, Georg Papastavrou   +3 more
wiley   +1 more source

Impact of Sonication Treatment on Physicochemical Properties of Carbon Blacks and Pt/C Catalysts in Proton Exchange Membrane Fuel Cells

Particle &Particle Systems Characterization, Volume 42, Issue 11, November 2025.
Here it is revealed how ultrasonic dispersion chemically and structurally alters Pt/C catalysts depending on carbon black type. While high surface area carbons remain stable, low and medium surface area carbons undergo oxidation, increasing charge‐transfer resistance and degrading fuel cell performance.
Adib Caidi, Thomas Lange, Ivan Radev, Volker Peinecke, Fatih Özcan, Doris Segets   +5 more
wiley   +1 more source

FRACTIONAL ORDER CONTROL OF A SINUSOIDAL OUTPUT INVERTER

Electrica, 2016
In this paper fractional order proportional integral derivative (FOPID) controller tuned with genetic algorithm (GA) is used to control of a novel designed sinusoidal output inverter.
Mehmed ÇELEBİ, Abdullah BAŞÇİ
doaj   +2 more sources

Real Time Performance Comparison of Buck Converter Circuit Controlled By Discrete Time PID, LQR and SMC Controllers in Continuous-Current Mode

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019
In this study, a DC-DC buckconverter circuit which is used to get direct voltage by decreasing the sourcevoltage is researched. Firstly mathematical model for a DC-DC buck convertercircuit is obtained and critical inductance value is calculated to make ...
Ömer Özdemir, İrfan Yazıcı
doaj   +1 more source

Templated N‐Doped Carbon Nanospheres with Tailored Porosity for High Performance PEM Fuel Cell Catalysts Under a Wide Range of Conditions

Advanced Energy Materials, Volume 15, Issue 36, September 23, 2025.
Monodisperse mesoporous N‐doped carbon nanospheres (MPNCs with 10 and 28 nm pores, >100 nm particle sizes) are used as advanced supports for Pt‐based PEMFC cathode catalysts. Their tailored intra‐ and interparticle porosity boosts oxygen transport and mass activity.
Julian Martin, Sven Küspert, Kläre Christmann, Robert Marić, Miriam von Holst, Hassan Fadlullah, Patrick Elsässer, K. Andreas Friedrich, Severin Vierrath, Nada Zamel, Anna Fischer   +10 more
wiley   +1 more source

Case Study of Dual‐Signal Processing of DAS‐VSP Vibrator Data From a 3D Survey in a Geothermal Reservoir

Geophysical Prospecting, Volume 73, Issue 7, September 2025.
ABSTRACT The three‐dimensional (3D) distributed acoustic sensing (DAS) vertical seismic profile (VSP) technique is an effective tool to characterize subsurface reservoirs, enabling the use of large and densely sampled borehole receiver arrays with many surface vibrator source points for onshore time‐lapse monitoring.
Flavio Poletto, Cinzia Bellezza, Gualtiero Böhm, Fabio Meneghini, Athena Chalari, Anna Stork, Mahmut Parlaktuna, Erdinç Şentürk, Deyan Draganov, Gijs van Otten, Sevket Durucan   +10 more
wiley   +1 more source

DESIGNING A WIND TURBINE WITH PERMANENT MAGNET SYNCHRONOUS MACHINE

Electrica, 2019
In this study, wind energy that is one of the sources of clean and renewable energy is modeled for generating electrical energy by using PSIM©. E- 33 type (ENERCON) wind turbine data sheet is used for the modeling.
M.Erdem TOPAL, Lale T. ERGENE
doaj   +2 more sources

EKDZ modelinin farklı bina dağılımları içeren senaryolara uygulanarak eğim kırınımı etkisinin araştırılması

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2016
Bu çalışmada, karasal radyo yayıncılığında kullanılan bazı yayılım modelleri kısaca anlatılacak, daha sonra EKDZ ve UKT yayılım modelleri kullanılarak benzetimler yapılacaktır. Bu benzetimler için kullanılacak senaryolar bazı istatistiksel ve geometrik
Mehmet Barış Tabakcıoğlu, Muhammed Reşit Çorapsız   +1 more
doaj   +1 more source