Marking Electrocatalysts on the “Volcanic Belt” of Hydrogen Electrode Reactions

2021 ◽  
Vol 125 (10) ◽  
pp. 5587-5595
Author(s):  
Junwei Li ◽  
Yaxin Ji ◽  
Junxiang Chen ◽  
Zhenhai Wen
Keyword(s):  
Volcanic Belt ◽  
Hydrogen Electrode ◽  
Electrode Reactions

On the Effect of Cu on the Activity of Carbon Supported Ni Nanoparticles for Hydrogen Electrode Reactions in Alkaline Medium

2015 ◽  
Vol 58 (18-20) ◽  
pp. 1181-1192 ◽  
Author(s):  
Alexandr G. Oshchepkov ◽  
Pavel A. Simonov ◽  
Olga V. Cherstiouk ◽  
Renat R. Nazmutdinov ◽  
Dmitrii V. Glukhov ◽  
...  
Keyword(s):  
Alkaline Medium ◽  
Ni Nanoparticles ◽  
Hydrogen Electrode ◽  
Electrode Reactions ◽  
Supported Ni

scholarly journals Spillover Phenomena and Its Striking Impacts in Electrocatalysis for Hydrogen and Oxygen Electrode Reactions

2011 ◽  
Vol 2011 ◽  
pp. 1-22 ◽  
Author(s):  
Georgios D. Papakonstantinou ◽  
Jelena M. Jaksic ◽  
Diamantoula Labou ◽  
Angeliki Siokou ◽  
Milan M. Jaksic
Keyword(s):  
Sol Gel ◽  
Mixed Valence ◽  
Spillover Effect ◽  
Oxygen Electrode ◽  
Dissociative Adsorption ◽  
Theory And Practice ◽  
Membrane Properties ◽  
Hydrogen Electrode ◽  
Electrode Reactions ◽  
Metal Support Interaction

The core subject of the present paper represents the interrelated spillover (effusion) phenomena both of the primary oxide and the H-adatoms, their theory and practice, causes, appearances and consequences, and evidences of existence, their specific properties, and their alterpolar equilibria and kinetic behavior, structural, and resulting catalytic, and double layer charging features. The aim is to introduce electron conductive and d-d interactive individual and composite (mixed valence) hypo-d-oxide compounds, of increased altervalent capacity, or their suboxides (Magnéli phases), as the interactive catalytic supports and therefrom provide (i) the strong metal-support interaction (SMSI) catalytic effect and (ii) dynamic spillover interactive transfer of primary oxides (M-OH) and free effusional H-adatoms for further electrode reactions and thereby advance the overall electrocatalytic activity. Since hypo-d-oxides feature the exchange membrane properties, the higher the altervalent capacity, the higher the spillover effect. In fact, altervalent hypo-d-oxides impose spontaneous dissociative adsorption of water molecules and then spontaneously pronounced membrane spillover transferring properties instantaneously resulting with corresponding bronze type (Pt/HxWO3) under cathodic and/or its hydrated state (Pt/W(OH)6), responsible for Pt-OH effusion, under anodic polarization, this way establishing instantaneous reversibly revertible alterpolar bronze features (Pt/H0.35WO3 Pt/W(OH)6) and substantially advanced electrocatalytic properties of these composite interactive electrocatalysts. Such nanostructured-type electrocatalysts, even of mixed-valence hypo-d-oxide structures (Pt/H0.35WO3/TiO2/C, Pt/HxNbO3/TiO2/C), have for the first time been synthesized by the sol-gel methods and shown rather high stability, electron conductivity, and nonexchanged initial pure monobronze spillover and catalytic properties. Such a unique electrocatalytic system, as the striking target issue of the present paper, has been shown to be the superior for substantiation of the revertible cell assembly for spontaneous reversible alterpolar interchanges between PEMFC and WE. The main target of the present thorough review study has been to throw some specific insight light on the overall spillover phenomena and their effects in electrocatalysis of oxygen and hydrogen electrode reactions from diverse angles of view and broad contemporary experimental methods and approaches (XPS, FTIR, DRIFT, XRD, potentiodynamic spectra, UHRTEM).

Exploring the Influence of the Nickel Oxide Species on the Kinetics of Hydrogen Electrode Reactions in Alkaline Media

2016 ◽  
Vol 59 (15-16) ◽  
pp. 1319-1331 ◽  
Author(s):  
Alexandr G. Oshchepkov ◽  
Antoine Bonnefont ◽  
Viktoriia A. Saveleva ◽  
Vasiliki Papaefthimiou ◽  
Spyridon Zafeiratos ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Alkaline Media ◽  
Hydrogen Electrode ◽  
Electrode Reactions ◽  
Kinetics Of

An FexNi4−xPy/N, P co-doped carbon nanotube composite as a bifunctional electrocatalyst for oxygen and hydrogen electrode reactions

2021 ◽  
Author(s):  
Tao Wei ◽  
Xiaoli Jiang ◽  
Qing Qin ◽  
Xien Liu
Keyword(s):  
Electrical Conductivity ◽  
Active Sites ◽  
Catalytic Performance ◽  
High Electrical Conductivity ◽  
Hydrogen Electrode ◽  
Bifunctional Electrocatalyst ◽  
Anchoring Effect ◽  
Electrode Reactions ◽  
Carbon Nanotube Composite ◽  
Co Doped

The FexNi4−xPy/N, P-CNT complex exhibits excellent bifunctional catalytic performance towards HER and OER due to the synergy of high electrical conductivity, multicomponent active sites, and anchoring effect of carbon nanotubes.

scholarly journals Observation of Three-Phase Interface during Hydrogen Electrode Reactions in Unitized Regenerative Fuel Cell

2014 ◽  
Vol 161 (10) ◽  
pp. F1002-F1005 ◽  
Author(s):  
Wataru Majima ◽  
Hisayoshi Matsushima ◽  
Yasuhiro Fukunaka ◽  
Mikito Ueda
Keyword(s):  
Fuel Cell ◽  
Phase Interface ◽  
Hydrogen Electrode ◽  
Electrode Reactions ◽  
Three Phase ◽  
Regenerative Fuel Cell
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