Three dimensionally ordered mesoporous hydroxylated NixCo3−xO4 spinels for the oxygen evolution reaction: on the hydroxyl-induced surface restructuring effect

2017 ◽  
Vol 5 (15) ◽  
pp. 7173-7183 ◽  
Author(s):  
I. Abidat ◽  
C. Morais ◽  
C. Comminges ◽  
C. Canaff ◽  
J. Rousseau ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Surface Modifications ◽  
Potential Cycling ◽  
Surface Restructuring ◽  
Ordered Mesoporous

Mesoporous nickel cobaltites synthesized using a nanocasting technique show high OER activity after surface modifications induced by potential cycling.

scholarly journals Influence of Chemical Operation on the Electrocatalytic Activity of Ba0.5Sr0.5Co0.8Fe0.2O3−δ for the Oxygen Evolution Reaction

2021 ◽  
Author(s):  
Yuta Inoue ◽  
Yuto Miyahara ◽  
Kohei Miyazaki ◽  
Yasuyuki Kondo ◽  
Yuko Yokoyama ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Alkaline Solution ◽  
Oxygen Evolution Reaction ◽  
Time Course ◽  
Potential Cycling ◽  
Leaching Behavior ◽  
Fundamental Understanding ◽  
A Site

Abstract Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) is a promising electrocatalyst for the oxygen evolution reaction (OER) in alkaline solution. The OER activities of BSCF are gradually enhanced by prolonging the duration of electrochemical operation at OER potentials, but the underlying cause is not fully understood. In this study, we investigated the role of chemical operation, equivalent to immersion in alkaline solution, in the time-course of OER enhancement of BSCF. Interestingly, the time-course OER enhancement of BSCF was promoted not only by electrochemical operation, which corresponds to potential cycling in the OER region, but also by chemical operation. In situ Raman measurements clarified that chemical operation had a lower rate of surface amorphization than electrochemical operation. On the other hand, the leaching behavior of A-site cations was comparable between chemical and electrochemical operations. Since the OER activity of BSCF was stabilized by saturating the electrolyte with Ba2+, “chemical” A-site leaching was key to inducing the time-course OER enhancement on perovskite electrocatalysts. Based on these results, we provide a fundamental understanding of the role of chemical operation in the OER properties of perovskites.

scholarly journals Dual Role of Silver Moieties Coupled with Ordered Mesoporous Cobalt Oxide towards Electrocatalytic Oxygen Evolution Reaction

2020 ◽  
Author(s):  
Mingquan Yu ◽  
Gun‐hee Moon ◽  
Rebeca G. Castillo ◽  
Serena DeBeer ◽  
Claudia Weidenthaler ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Dual Role ◽  
Ordered Mesoporous

Ordered Mesoporous Cobalt–Nickel Nitride Prepared by Nanocasting for Oxygen Evolution Reaction Electrocatalysis

2019 ◽  
Vol 6 (20) ◽  
pp. 1900960 ◽  
Author(s):  
Ali Saad ◽  
Zhixing Cheng ◽  
Xuyang Zhang ◽  
Siqi Liu ◽  
Hangjia Shen ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Cobalt Nickel ◽  
Ordered Mesoporous ◽  
Nickel Nitride

scholarly journals Ultrathin Amorphous Nickel Doped Cobalt Phosphates with Highly Ordered Mesoporous Structures as Efficient Electrocatalyst for Oxygen Evolution Reaction

Small ◽  
2020 ◽  
Vol 16 (7) ◽  
pp. 1906766 ◽  
Author(s):  
Lan Yang ◽  
Hao Ren ◽  
Qinghua Liang ◽  
Khang Ngoc Dinh ◽  
Raksha Dangol ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Ordered Mesoporous ◽  
Mesoporous Structures

scholarly journals Three-dimensional ordered mesoporous Co3O4 enhanced by Pd for oxygen evolution reaction

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Qing Qu ◽  
Jian-Hua Zhang ◽  
Jing Wang ◽  
Qing-Yu Li ◽  
Chang-Wei Xu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Three Dimensional ◽  
Ordered Mesoporous
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