Results 21 to 30 of about 64 (61)

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

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

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

A Solar to Chemical Strategy: Green Hydrogen as a Means, Not an End

Global Challenges, Volume 8, Issue 6, June 2024.
As the chemical industry seeks to achieve net‐zero emissions, green hydrogen emerges as a critical solution. This work explores the potential of photocatalysis in the production of essential commodity chemicals, such as NH3 and H2O2, driven by sunlight and water.
Gabriel A. A. Diab, Marcos A. R. da Silva, Guilherme F. S. R. Rocha, Luis F. G. Noleto, Andrea Rogolino, João P. de Mesquita, Pablo Jiménez‐Calvo, Ivo F. Teixeira   +7 more
wiley   +1 more source

PEM Electrolysis in a Stirred‐Tank Bioreactor Enables Autotrophic Growth of Clostridium ragsdalei with CO2 and Electrons

ChemElectroChem, Volume 11, Issue 6, March 15, 2024.
By integration of a PEM electrolysis single cell to the bottom of a stirred tank bioreactor, an integrated bio‐electrocatalytic system (BES) was developed. The BES allows control of potential, pH and temperature with an online‐detection of product formation rates.
Irina Schwarz, Arielle Rieck, Asad Mehmood, Raphaela Bublitz, Lukas Bongers, Dirk Weuster‐Botz, Tim‐Patrick Fellinger   +6 more
wiley   +1 more source

Rejoint of Carbon Nitride Fragments into Multi‐Interfacial Order‐Disorder Homojunction for Robust Photo‐Driven Generation of H2O2

Advanced Materials, Volume 36, Issue 9, March 1, 2024.
Herein, a directed healing process is employed to splice carbon nitride pieces into a carbon nitride homojunction with multiple order‐disorder interfaces. The resultant catalyst exhibits boosted charge dynamics and more spatially and orderly separated redox centers, resulting in a remarkable yield, an excellent selectivity, and a prominent solar‐to ...
Fengting He, Yangming Lu, Yuzhao Wu, Shuling Wang, Yang Zhang, Pei Dong, Yongqiang Wang, Chaocheng Zhao, Shuaijun Wang, Jinqiang Zhang, Shaobin Wang   +10 more
wiley   +1 more source

Predictive Numerical Analysis on the Mixing Characteristics in a Rotating Detonation Engine (RDE)

Predictive Numerical Analysis on the Mixing Characteristics in a Rotating Detonation Engine (RDE)
Detonation potential in rotating detonation engine (RDE) depends on well-mixed fuel and oxidizer in the annulus. A numerical study was carried out to analyze hydrogen (H2) . oxygen (O2) mixing in RDE prior to the detonation. A validation was effectively achieved by comparing the expected detonation criteria with the reported experimental results where ...
openaire  

Pressure Characteristics and Secondary Ignition Effects of Gas Produced in RDE Using Lignite and Anthracite/CH₄ Fuel. [PDF]

ACS Omega
Guo J, Ge S, Yang R, Liang J, Guo Y.
europepmc   +1 more source