Results 31 to 40 of about 31,250 (195)

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

Magneto‐Ionic Devices With Polymer‐Based Electrolytes

Advanced Functional Materials, EarlyView.
Polymer electrolytes are introduced for magneto‐ionic devices based on hydroxide and hydrogen ions. The magneto‐ionic effect results in a pronounced voltage‐controlled variation of coercivity in both devices. The switching speed is in the range of 100 ms.
Markus Gößler, Richard Weber, Michael Sommer, Karin Leistner   +3 more
wiley   +1 more source

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

Oxygen Evolution Electrocatalysts with Trinuclear, Mixed‐Valence Iron Motifs on Electronically Aligned Carbon Dots

Advanced Functional Materials, EarlyView.
Trinuclear iron oxo‐bridged catalytic ensembles stabilized by aspartic‐acid‐derived carbon dots provide an effective platform for alkaline oxygen evolution. Mixed‐valence charge balancing, inner‐sphere charge transport, and work‐function alignment within the N/O‐rich carbon framework promote cooperative Fe‐site chemistry and efficient OER ...
Megha A. Deshmukh, Giorgio Zoppellaro, Emiliano Fonda, Lukáš Zdražil, Shounik Paul, David Panáček, Hanuman Thorat, Zdeněk Badura, Michele Melchionna, Manuela Bevilacqua, Paolo Fornasiero, Klaus Müllen, Radek Zbořil, Aristides Bakandritsos   +13 more
wiley   +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

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

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

Phase Boundary Engineering of Co2P‐CoP Branched Nanoparticles Enhances Cobalt Oxidation for Oxygen Evolution Electrocatalysis

Advanced Materials, EarlyView.
Phase boundaries between Co2P and CoP are constructed through a controlled transformation of Co to Co2P‐CoP branched nanoparticles. The polycrystalline mixed‐phase Co2P‐CoP branches are enriched with phase boundaries that stabilize Co active sites for OER. This work highlights phase boundary engineering as a powerful approach to tailor active sites and
Zeno R. Ramadhan, Soshan Cheong, Sankhadip Saha, Qinyu Li, Xiaoran Zheng, Samuel V. Somerville, Agus R. Poerwoprajitno, Priyank V. Kumar, Liming Dai, J. Justin Gooding, Richard D. Tilley   +10 more
wiley   +1 more source

Enhancing the performance of nickel-cobalt selenide electrocatalyst on hydrochar support for oxygen evolution reaction

Scientific Reports
This study explores the development and characterization of a nickel-cobalt selenide (Ni0.6Co0.4Se2, 1:1, 0.01) electrocatalyst supported on hydrochar and nickel foam for the oxygen evolution reaction (OER) in alkaline water electrolysis.
Joaquin Nathaniel A. Perez, Chris Ivan B. Sungcang, Patricia Isabel R. Soriano, Gio Jerson C. Almonte, Angelo Earvin Sy Choi, Joseph R. Ortenero   +5 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