Results 81 to 90 of about 54,095 (295)

Carbon Shell‐Encapsulated PtFe Catalysts in High Temperature Polymer Electrolyte Membrane Fuel Cells: Balancing Molecular Sieving and Diffusion for Enhanced Reactant Access

Advanced Functional Materials, EarlyView.
Scanning electrochemical microscopy reveals reactant diffusion through porous carbon shells to PtFe cores, while the carbon‐encapsulated PtFe enables high‐performance HT‐PEMFC operation by sieving phosphate ions that induce catalyst poisoning. ABSTRACT High‐temperature polymer electrolyte membrane fuel cells (HT‐PEMFCs) operating at 160°C on phosphoric
Myeong‐Geun Kim, Sourabh S. Chougule, Suji Lee, Young Sang Park, Jihyun Choi, Katie Heeyum Lim, Albert S. Lee, Hyun S. Park, Namgee Jung, Sung Jong Yoo   +9 more
wiley   +1 more source

Recent advances on the electrocatalytic oxidation of biomass-derived aldehydes

Green Energy & Environment
The escalating demand for sustainable and environmentally benign chemical processes has driven the exploration of biomass as an alternative to non-renewable resources.
Zhikeng Zheng, Ke Li, Lu Lin, Zhiwei Jiang, Yuchen Wang, Kai Yan   +5 more
doaj   +1 more source

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Electrocatalytic Activities towards the Electrochemical Oxidation of Formic Acid and Oxygen Reduction Reactions over Bimetallic, Trimetallic and Core–Shell-Structured Pd-Based Materials

Inorganics, 2019
The structural design of nanosized electrocatalysts is extremely important for cathodic oxygen reduction reactions (ORR) and anodic oxidation reactions in small organic compounds in direct fuel cells.
Takao Gunji, Futoshi Matsumoto
doaj   +1 more source

Cross-linked CoMoO4/rGO nanosheets as oxygen reduction catalyst [PDF]

, 2017
Development of inexpensive and robust electrocatalysts towards oxygen reduction reaction (ORR) is crucial for the cost-affordable manufacturing of metal-air batteries and fuel cells. Here we show that cross-linked CoMoO4 nanosheets and reduced graphene
Fu, Jiaqi, Li, Yang-Guang, Meng, Jiang-Li, Miras, Haralampos N., Tan, Hua-Qiao, Wang, Yong-Hui, Wei, Mei-Jie, Zang, Hong-Ying   +7 more
core   +2 more sources

Electrocatalytic Ammonia Oxidation by Pyridyl-Substituted Ferrocenes

Journal of the American Chemical Society
Ammonia (NH3) is a promising carbon-free fuel when prepared from sustainable resources. First-row transition metal electrocatalysts for ammonia oxidation are an enabling technology for sustainable energy production. We describe electrocatalytic ammonia oxidation using robust molecular complexes based on Earth-abundant iron.
Md Estak Ahmed, Richard J. Staples, Thomas R. Cundari, Timothy H. Warren   +3 more
openaire   +2 more sources

2D Co‐Mo‐Hydroxide‐Based Multifunctional Material for the Development of H2‐Based Clean Energy Technologies

Advanced Materials, EarlyView.
2D α‐Co(OH)2 interleaved with Mo species displays an appealing dual functionality for the production and use of green hydrogen.Mo incorporation greatly benefits the electrochemical behaviour in Oxygen Evolution Reaction for H2 production, while the magnetocaloric response at liquid H2 temperature paves the way for alternative cryogenic refrigerants ...
Daniel Muñoz‐Gil, Celia Castillo‐Blas, Dawid Krystian Feler, Isabel Gómez‐Recio, Miguel Tinoco, Ana Querejeta‐Fernández, Rodrigo González‐Prieto, Felipe Gándara, Romualdo Santos Silva Jr, Pilar Ferrer, Carlos Prieto, Luc Lajaunie, José Luis Martinez‐Peña, María Luisa Ruiz‐González, José María González‐Calbet   +14 more
wiley   +1 more source

Antimony-doped graphene nanoplatelets [PDF]

, 2015
Heteroatom doping into the graphitic frameworks have been intensively studied for the development of metal-free electrocatalysts. However, the choice of heteroatoms is limited to non-metallic elements and heteroatom-doped graphitic materials do not ...
A Fasolino, A Ramelan, AA Balandin, AB Stambouli, C Zhang, C-M Gong, D Geng, H Liu, I-Y Jeon, I-Y Jeon, I-Y Jeon, I-Y Jeon, J Chen, J Greeley, J Liang, JK Nørskov, JP Collman, JW Cogswell, K Schoots, KN Kudin, KP Gong, KS Kim, L Qu, MD Stoller, MP Seah, R Bashyam, R Liu, RC Saxena, S Bae, S Jacobsson, S Wang, S Yang, T Krishnakumar, T Xing, T Yu, TO Wehling, W Sheng, WE Swartz Jr, WS Hummers Jr, X Sun, X Wang, Y Bing, Y Liang, YD Wang, Z Jin, Z Yang, Z-H Sheng, ZQ Li   +47 more
core   +1 more source

POM‐Based Water Splitting Catalyst Under Acid Conditions Driven by Its Assembly on Carbon Nanotubes

Advanced Materials, EarlyView.
A newly‐engineered POM‐based electrocatalyst incorporating non‐innocent counter cations exhibits fast kinetics for either the OER or HER under strongly acidic conditions (1 m H2SO4), depending on whether it is assembled on carbon nanotubes (1@CNT) or physically mixed with them (1/CNT). In water‐splitting tests using a two‐electrode setup, these systems
Eugenia P. Quirós‐Díez, Melanie Guillén‐Soler, Carlos Herreros‐Lucas, Alejandro López‐Moreno, José Manuel Vila‐Fungueiriño, Antonio Luis Llamas‐Saiz, Karol Strutyński, Manuel Melle‐Franco, María del Carmen Giménez‐López   +8 more
wiley   +1 more source

Synthesis of Au@PtAuAg Yolk-Shell Nanoalloy as an Electrocatalyst for Methanol Oxidation Reaction

International Journal of Electrochemical Science, 2019
Au@PtAuAg yolk-shell nanoalloy composed of an Au nanoparticle core and a PtAuAg shell was synthesized via a simple wet-chemical method. The Au@PtAuAg nanoalloy was applied as an electrocatalyst for methanol oxidation reaction, and it shows a good ...
Zirong Li, Jiajing Li, Zhenghua Wang
doaj   +1 more source