Results 51 to 60 of about 512 (129)

Degradation of NiMo Catalyst Under Intermittent Operation of Anion Exchange Membrane Water Electrolyzer and its Mitigation by Carbon Encapsulation

Advanced Energy Materials, Volume 15, Issue 32, August 26, 2025.
Herein, by employing a reference electrode, the durability of anion exchange membrane water electrolyzer (AEMWE) under intermittent condition is demonstrated to be governed by the stability of the cathode catalyst. By encapsulating NiMo catalyst with carbon shells, the oxidation‐induced irreversible transformation to inactive hydroxide is prevented ...
Sun Seo Jeon, Yunji Choi, Jae Won Lee, Robert Haaring, Wonjae Lee, Hyeseong Jeon, Jeonghyun Nam, Eunchong Lee, Seungwoo Lee, Minjoon Kim, Yeon Sik Jung, Yousung Jung, Yun Jeong Hwang, Hyunjoo Lee   +13 more
wiley   +1 more source

Tracing Iridium Dissolution Pathways in Proton Exchange Membrane Water Electrolyzers at Relevant Current Densities in Real Time

ChemElectroChem, Volume 12, Issue 15, July 24, 2025.
Tracking down dissolved iridium species in proton exchange membrane water electrolysis, an innovative half‐cell method coupled to inductively coupled plasma‐mass spectrometry sheds light on iridium dissolution under industrially relevant current densities and the transport pathways through porous transport layer or proton exchange membrane.
Nico C. Röttcher, Jiahua Zhou, Lukas Löttert, Karl J. J. Mayrhofer, Dominik Dworschak   +4 more
wiley   +1 more source

UEG Week 2023 Poster Presentations

, 2023
United European Gastroenterology Journal, Volume 11, Issue S8, Page 535-1498, October 2023.
wiley   +1 more source

Electrocatalytic CO2 Reduction to Multi‐Carbon Products on Non‐Copper‐Based Catalysts: Reaction Pathways, Enhancement Strategies, and Future Challenges

Carbon and Hydrogen, Volume 27, Issue 2, Page 102-127, July 2025.
We systematically analyze the main reaction pathways leading to C2+ products, including ethylene formation and higher hydrocarbon (C2–4) alcohols and oxygenates, while critically assessing the mechanistic insights that differentiate non‐copper catalysts from their Cu‐based counterparts. ABSTRACT The need to secure environmentally sustainable sources of
Nida Rehman, Yilin Wang, Xinyi Tan, Xinyi Fan, Xueying Li, Wancai Shi, Alex W. Robertson, John Texter, Ume Aiman, Zhenyu Sun   +9 more
wiley   +1 more source

Rapid Scalable One‐step Production of Catalysts for Low‐Iridium Content Proton Exchange Membrane Water Electrolyzers

Advanced Energy Materials, Volume 15, Issue 1, January 7, 2025.
Intense mixing of metal vapor and large thermal gradients in the precursor‐derived high‐temperature flame enables the production of IrySn0.9(1−y)Sb0.1(1−y)Ox solid solutions as efficient and stable electrocatalysts for PEMWE. The one‐step prepared electrocatalysts exhibit high performance and stability over 2000 h but with tenfold lower Ir loading than
Suriya Venkatesan, Jens Mitzel, Sambal Shashank Ambu, Tobias Morawietz, Indro Biswas, Oscar Recalde, Esmaeil Adabifiroozjaei, Leopoldo Molina‐Luna, Deven P. Estes, Karsten Wegner, Pawel Gazdzicki, Aldo Saul Gago, Kaspar Andreas Friedrich   +12 more
wiley   +1 more source

Analytical Models for the Thrust of a Rotating Detonation Engine [PDF]

, 2017
Two models are proposed for rotating detonation engine performance. The first model is motivated by models of pulse detonation engine performance which are based on the pressure-time history within the detonation tube.
Kasahara, J., Shepherd, J.E.
core  

Determining the Pressure Gain of Pressure Gain Combustion [PDF]

Over the past few decades, there has been significant research into propulsion concepts attempting to employ pressure gain combustion. Pressure gain combustion concepts to date have resulted in dynamic, non-uniform gas flows which are difficult to ...
Paxson D.E., Paxson D.E., Paxson D.E., Paxson D.E., Paxson D.E., Paxson D.E., Perkins H.D.   +6 more
core   +2 more sources

Characteristics of Rotating Detonation Engines for Propulsion and Power Generation [PDF]

, 2022
Conventional engines are limited by the efficiency of their combustion mode. Compared to present constant pressure deflagration-based engines, detonation-based systems can realize a higher thermodynamic cycle efficiency, making them an attractive ...
Burke, Robert
core   +1 more source

Green Hydrogen Production by Low‐Temperature Membrane‐Engineered Water Electrolyzers, and Regenerative Fuel Cells

Small Methods, Volume 8, Issue 12, December 19, 2024.
This review examines green H2 production from water electrolyzers, focusing on key aspects of electrolyzer design, including anode and cathode catalyst fabrications, MEA engineering, and cell stack configurations in AEMWE and PEMWE. It discusses H2‐related fuel cells and regenerative fuel cells.
Alexandre Bodard, Zhangsen Chen, Oumayma ELJarray, Gaixia Zhang   +3 more
wiley   +1 more source

Product Distribution of Steady–State and Pulsed Electrochemical Regeneration of 1,4‐NADH and Integration with Enzymatic Reaction

ChemistryOpen, Volume 13, Issue 8, August 2024.
This study investigates the direct electrochemical reduction of NAD+ for enzymatic cofactor regeneration. It discovers that dynamic conditions improve the short time selectivity towards 1,4‐NADH, but also result in the production of inactive by–products.
Mohammed Ali Saif Al‐Shaibani, Thaleia Sakoleva, Luka A. Živković, Harry P. Austin, Mark Dörr, Liane Hilfert, Edgar Haak, Uwe T. Bornscheuer, Tanja Vidaković‐Koch   +8 more
wiley   +1 more source