Role of Surface Steps in Activation of Surface Oxygen Sites on Ir Nanocrystals for Oxygen Evolution Reaction in Acidic Media

2021 ◽  
pp. 120834
Author(s):  
Myeongjin Kim ◽  
Jinho Park ◽  
Maoyu Wang ◽  
Qingxiao Wang ◽  
Moon J. Kim ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Surface Oxygen ◽  
Acidic Media ◽  
Surface Steps

scholarly journals Short O–O separation in layered oxide Na0.67CoO2 enables an ultrafast oxygen evolution reaction

2019 ◽  
Vol 116 (47) ◽  
pp. 23473-23479 ◽  
Author(s):  
Hao Wang ◽  
Jinpeng Wu ◽  
Andrei Dolocan ◽  
Yutao Li ◽  
Xujie Lü ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Alkaline Solution ◽  
Oxygen Evolution Reaction ◽  
Room Temperature ◽  
Surface Oxygen ◽  
Layered Oxide ◽  
Onset Potential ◽  
Strong Hybridization ◽  
Trigonal Prismatic

The layered oxide Na0.67CoO2 with Na+ occupying trigonal prismatic sites between CoO2 layers exhibits a remarkably high room temperature oxygen evolution reaction (OER) activity in alkaline solution. The high activity is attributed to an unusually short O–O separation that favors formation of peroxide ions by O−–O– interactions followed by O2 evolution in preference to the conventional route through surface O–OH– species. The dependence of the onset potential on the pH of the alkaline solution was found to be consistent with the loss of H+ ions from the surface oxygen to provide surface O− that may either be attacked by solution OH− or react with another O−; a short O–O separation favors the latter route. The role of a strong hybridization of the O–2p and low-spin CoIII/CoIV π-bonding d states is also important; the OER on other CoIII/CoIV oxides is compared with that on Na0.67CoO2 as well as that on IrO2.

Amorphous Iron–Manganese Oxyfluorides, Promising Catalysts for Oxygen Evolution Reaction under Acidic Media

2021 ◽  
Vol 4 (2) ◽  
pp. 1173-1181
Author(s):  
Kévin Lemoine ◽  
Zahra Gohari-Bajestani ◽  
Romain Moury ◽  
Alexandre Terry ◽  
Amandine Guiet ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Acidic Media ◽  
Amorphous Iron ◽  
Iron Manganese

Bifunctional citrate-Ni0.9Co0.1(OH)x layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation

Nanoscale ◽  
2021 ◽  
Author(s):  
Peng Wang ◽  
Feng Li ◽  
Xuefeng Long ◽  
Tong Wang ◽  
Huan Chai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Surface Oxygen ◽  
Co Catalyst ◽  
Photoelectrochemical Water Oxidation

Surface modification by loading a water oxidation co-catalyst (WOC) is generally considered to be an efficient means to optimize the sluggish surface oxygen evolution reaction (OER) of hematite photoanode for...

Interfacing RuO2 with Pt to induce efficient charge transfer from Pt to RuO2 for highly efficient and stable oxygen evolution under acidic media

2021 ◽  
Author(s):  
Taehyun Kwon ◽  
Heesu Yang ◽  
Minki Jun ◽  
Taekyung Kim ◽  
Jinwhan Joo ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Acidic Media ◽  
Highly Efficient ◽  
Efficient Charge ◽  
Stable Oxygen ◽  
The Stability

The oxygen evolution reaction (OER) requires a large overpotential which undermines the stability of electrocatalysts, typically IrOx or RuOx. RuOx is particularly vulnerable to high overpotential in acidic media, due...

Effect of Adding CeO2to RuO2-IrO2Mixed Nanocatalysts: Activity towards the Oxygen Evolution Reaction and Stability in Acidic Media

2015 ◽  
Vol 2 (8) ◽  
pp. 1128-1137 ◽  
Author(s):  
Thomas Audichon ◽  
Sophie Morisset ◽  
Teko W. Napporn ◽  
K. Boniface Kokoh ◽  
Clément Comminges ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Acidic Media

Dual Role of Deep Eutectic Solvent as a Solvent and Template for the Synthesis of Octahedral Cobalt Vanadate for an Oxygen Evolution Reaction

2018 ◽  
Vol 6 (12) ◽  
pp. 16255-16266 ◽  
Author(s):  
Gaurav M. Thorat ◽  
Harsharaj S. Jadhav ◽  
Animesh Roy ◽  
Wook-Jin Chung ◽  
Jeong Gil Seo
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Deep Eutectic Solvent ◽  
Dual Role

The role of selenium vacancies in the enhancement of electrocatalytic activity of CoNiSe2 for the oxygen evolution reaction

2021 ◽  
Vol 514 ◽  
pp. 230596
Author(s):  
Abdelhadi El Jaouhari ◽  
Amine Slassi ◽  
Bowen Zhang ◽  
Anton Pershin ◽  
Wei Liu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity

Stabilizing role of Mo in TiO2-MoOx supported Ir catalyst toward oxygen evolution reaction

2021 ◽  
Vol 280 ◽  
pp. 119433 ◽  
Author(s):  
Eom-Ji Kim ◽  
Jaewook Shin ◽  
Junu Bak ◽  
Sang Jae Lee ◽  
Ki hyun Kim ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction
Sign in / Sign up

Export Citation Format

Share Document