Results 31 to 40 of about 11,597 (266)

Investigation of multiple commercial electrocatalysts and electrocatalyst degradation for fuel cells in real vehicles

RSC Advances, 2022
The coalescence of Pt nanoparticles during operation in a real vehicle is considered to be the main reason to weaken the ORR. The trajectories of oriented attachment were disclosed by observing the coalescence events of Pt NPs using in situ TEM.
Wenhui He, Yanjuan Xiang, Mudi Xin, Limei Qiu, Wenyan Dong, Wenhui Zhao, Yuxia Diao, Aiguo Zheng, Guangtong Xu   +8 more
openaire   +2 more sources

Toward Fast Proton Shuttling in Acidic Oxygen Evolution Reaction

Advanced Functional Materials, EarlyView.
This review establishes proton transfer dynamics as a descriptor governing acidic OER activity, moving beyond the kinetic constraints derived from the proton coupled electron transfer. We discuss how deprotonation governs classical mechanisms, including adsorbate evolution mechanism (AEM), lattice oxygen mechanism (LOM) and oxide path mechanism (OPM ...
Ashish Gaur, Jaeyeong Kim, Sungwook Mhin, HyukSu Han   +3 more
wiley   +1 more source

Support‐Controlled Reaction Pathways via Dynamic Sulfur‐Mediated Interfaces for Selective Urea Electrolysis

Advanced Functional Materials, EarlyView.
Sulfur‐doped graphitized carbon nanofibers act as adaptive catalyst–support platforms, enabling dynamic sulfur‐mediated reconstruction and strong metal–support interactions. This unique behavior enhances catalyst stability and controls reaction pathways, achieving highly selective urea oxidation (∼92% N2) coupled with efficient hydrogen evolution ...
Melanie Guillén‐Soler, Lucía Vizcaíno‐Anaya, Ahmad Tayyebi, José Manuel Vila‐Fungueiriño, María del Carmen Giménez‐López   +4 more
wiley   +1 more source

Synthesis and electrochemical characterization of Graphene-Polyallylamine Nanocomposites as a New Supports of Pt Catalyst for Direct Methanol Fuel Cell Application [PDF]

Hydrogen, Fuel Cell & Energy Storage, 2019
In this research, nanocomposites of Platinum Graphene-Polyallylamine (Pt/PAA/GNP) were developed to increase the methanol electro-oxidation activity and stability of commercial Pt/C electrocatalyst.
Maryam Yaldagard
doaj   +1 more source

Highly porous interconnected MoP decorated graphene oxide as remarkably efficient electrocatalyst

Heliyon, 2023
Hydrogen (H2) production through water splitting has less viable applications due to the unfavourable kinetics of the reaction. Electrocatalysts with a robust structure, high levels of catalytic activity, and a high degree of stability are in high demand
Rafiq Khosa, Erum Pervaiz, Uzair Abdullah, Umair Sohail   +3 more
doaj   +1 more source

General Synthesis of Amorphous Pd‐Based Nanoparticles Towards Highly Efficient Nitrate‐to‐Ammonia Electrocatalysis

Advanced Functional Materials, EarlyView.
A family of amorphous palladium‐based multi‐component phosphides nanoparticles, synthesized via a robust one‐step wet‐chemical method, overcoming the immiscibility of different elements and the difficulty in forming a stable, disordered structure. When applied in the electrochemical nitrate reduction reaction, these nanocatalysts effectively suppress ...
Lei Xu, Chuhao Luan, Mingzi Sun, Weiwei Chen, Xiaozhi Liu, Chen Ma, Long Zheng, Gang Wang, Peng Han, Ping Gu, Xiao Wang, Chenhao Shu, Cheng Lyu, Zhenyu Zhang, Nailiang Yang, Hongyan He, Xiaohong Li, Dong Su, Bolong Huang, Wenjun Zhang, Ye Chen   +20 more
wiley   +1 more source

Electrolyte‐Induced Cu+ Preservation Results in a Selectivity Switch of Electrocatalytic CO2 Reduction at a Copper‐Organic Framework as Electrocatalyst

Advanced Functional Materials, EarlyView.
The active role of KCl as a neutral electrolyte enables switching the selectivity on a Cu organic framework from C1 to C2+ products during electrocatalytic CO2 reduction. ABSTRACT We introduce a copper‐nicotinate (Cu‐NA) framework as a halogenide‐stabilized Cu+/Cu0 pre‐catalyst for electrocatalytic CO2 reduction with high C2+ selectivity in a “neutral”
Anirudha Shekhawat, Muhammad Adib Abdillah Mahbub, Lejing Li, Bashir Eid, Ridha Zerdoumi, Sabine Seisel, Carla Santana Santos, Nini Zhang, Thomas Quast, Xin Wang, Wolfgang Schuhmann, Debanjan Das   +11 more
wiley   +1 more source

Novel mixed heterovalent (Mo/Co)Ox-zerovalent Cu system as bi-functional electrocatalyst for overall water splitting

Scientific Reports
A novel hybrid ternary metallic electrocatalyst of amorphous Mo/Co oxides and crystallized Cu metal was deposited over Ni foam using a one-pot, simple, and scalable solvothermal technique.
Ahmed R. Tartour, Moustafa M. S. Sanad, Ibrahim S. El-Hallag, Youssef I. Moharram   +3 more
doaj   +1 more source

Electrodeposition: An efficient method to fabricate self‐supported electrodes for electrochemical energy conversion systems

Exploration, 2022
The development of electrocatalysts for energy conversion systems is essential for alleviating environmental problems and producing useful energy sources as alternatives to fossil fuels.
Junhyeong Kim, Hyunki Kim, Gyeong Ho Han, Seokjin Hong, Juhae Park, Junbeom Bang, Soo Young Kim, Sang Hyun Ahn   +7 more
doaj   +1 more source

Electrospun Wood‐Derived Biopolymers as Electrodes in Electrochemical Energy Storage Technologies

Advanced Functional Materials, EarlyView.
Electrospinning transforms wood‐derived cellulose and lignin into architecturally defined, binder‐free carbon electrodes with tuneable porosity and functionality. This review shows how fibre design enables decoupled charge and mass transport, enhancing performance across battery systems, while identifying key challenges in spinnability, scalability ...
Michael W. Thielke, Hattie R. Chisnall, Jesus Vazquez Chavez, Ana B. Jorge Sobrido   +3 more
wiley   +1 more source