Results 31 to 40 of about 31,504 (300)

Heteroatom Doping Synergistic Iron Nitride Induced Charge Redistribution of Carbon based Electrocatalyst with Boosted Oxygen Reduction Reaction

ChemElectroChem, 2023
Oxygen reduction reaction (ORR) is Achilles’ heel of zinc‐air battery. The ideal electrocatalyst for ORR should combine both high activity and high stability.
Dr. Yuyu Guo, Dr. Dianyu Xu, Dr. Shuting Li, Dr. Jinxi Han, Prof. Qi Yang, Prof. Zhengqiang Xia, Prof. Gang Xie, Prof. Sanping Chen, Prof. Shengli Gao   +8 more
doaj   +1 more source

High-performance Fe–N–C electrocatalysts with a “chain mail” protective shield

Nano Materials Science, 2021
Nitrogen-coordinated iron atoms on carbon supports (Fe–N–C) are among the most promising noble-metal-free electrocatalysts for oxygen reduction reaction (ORR). However, their unsatisfactory stability limits their practical application.
Zixun Yu, Chang Liu, Junsheng Chen, Ziwen Yuan, Yuan Chen, Li Wei   +5 more
doaj   +1 more source

Polarizable Vanadium Dipoles Promote Water Dissociation on Vanadium‐Based Metal Organic Framework

Advanced Functional Materials, EarlyView.
The polarization of unpaired V 3d electrons weakens the H─O bond to improve water dissociation by the dual Vδ+:O─H and Pλ−:H─O coupling hydrogen bonds formation and relaxation. P@V‐MOF electrocatalyst shows low overpotentials (94 mV in acid, 178 mV in neutral, and 77 mV in alkaline solutions) with excellent stability for effective overall water ...
Xinjuan Liu, Jun Xu, Minmin Fan, Jingcheng Xu, Mengyuan Li, Yun Gong, Weiwei Yang, Lei Li, Yong Zhou, Deqiang Zhao, Yuhua Xue, Xingtao Xu, Chang Q. Sun, Liming Dai   +13 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

What Limits Conquest of Stability Descriptors? – Intriguing Aspects of Dissolution of Oxygen Evolution Electrocatalysts

ChemElectroChem
Design of active and stable electrocatalysts for the oxygen evolution reaction (OER) requires in‐depth understanding of the electrocatalyst properties and interfacial structural dynamics during OER.
Dr. Aleksandar R. Zeradjanin, Dr. Ahyoun Lim, Dr. Ioannis Spanos, Dr. Justus Masa   +3 more
doaj   +1 more source

Highly Efficient Electrocatalytic Hydrogen Production over Carbon Nanotubes Loaded with Platinum Nanoparticles Using Solution Processing

Advanced Materials Interfaces, 2023
Proton exchange membrane (PEM) electrolyzers are used for hydrogen (H2) production by water electrolysis. The commercial cathodic electrocatalyst for this process is typically mechanically mixed platinum on carbon (Pt/C).
Osama R. M. Metawea, Miyuki Nara, Takeharu Murakami, Satoshi Wada, Katsushi Fujii, Yoshihiro Ito, Masuki Kawamoto   +6 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

Functionalizing Micro‐to‐Mesoscopic Electrode Architectures for Regulating Electron Transfer Behaviors in Electrocatalysis

Advanced Functional Materials, EarlyView.
A systematic review is conducted to assess the influence of electrode architecture across micro‐ to mesoscopic length scales on electron‐transfer pathways in electrocatalysis. We discuss the structure‐activity relationships in electrocatalytic applications, including resource recovery and environmental remediation, and provide cost‐effective, efficient
Manshu Zhao, Jiaojiao Zhang, Shideng Yuan, Xinmeng Yu, Keming Wan, Xiaoguang Duan, Zhining Wang   +6 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

Stable and efficient hydrogen evolution reaction catalyzed by NiO-Rh2P heterostructure electrocatalyst

Catalysis Communications, 2022
A NiO-Rh2P heterostructure electrocatalyst was constructed by phosphating the NiO-Rh structure. Due to the high capability of water dissociation by NiO, only 46 mV overpotential was demanded to achieve 10 mA cm−2 for the NiO-Rh2P, which is 73 mV lower ...
Shuyuan Pan, Xinxin Yu, Ying Ling, Zehui Yang   +3 more
doaj   +1 more source