Comparison of the effects of cation and phosphorus doping in cobalt-based spinel oxides towards the oxygen evolution reaction

CrystEngComm ◽  
2021 ◽  
Author(s):  
Lili Yao ◽  
Wenxiu Yang ◽  
Yongjian Niu ◽  
Jiming Liu ◽  
Shun Zhang ◽  
...  
Keyword(s):  
Surface Area ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Oxygen Vacancies ◽  
Active Surface ◽  
Active Surface Area ◽  
Phosphorus Doping ◽  
Electrochemically Active ◽  
Spinel Oxides ◽  
Electrochemically Active Surface

Phosphorus incorporation further boosted the OER activity of cation-doped Co-based spinel oxides via remarkably tuning the oxygen vacancies, crystallinity and electrochemically active surface area on the surface.

scholarly journals Hexadecyltrimethylammonium hydroxide promotes electrocatalytic activity for the oxygen evolution reaction

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Yugan Gao ◽  
Chengqi Wu ◽  
Sen Yang ◽  
Yiwei Tan
Keyword(s):  
Surface Area ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Active Surface ◽  
Ammonia Borane ◽  
Absolute Number ◽  
Alkaline Electrolyte ◽  
Active Surface Area ◽  
Electrochemically Active ◽  
Electrochemically Active Surface

Abstract The oxygen evolution reaction is an essential factor in many renewable energy technologies, such as water splitting, fuel cells, and metal–air batteries. Here we show a unique solution to improve the oxygen evolution reaction rate by adjusting the electrolyte composition via the introduction of hexadecyltrimethylammonium hydroxide into an alkaline electrolyte. The strong adsorption of hexadecyltrimethylammonium cations on the surface of electrocatalysts provides the increased absolute number of OH− ions near the electrocatalyst surface, which effectively promotes the oxygen evolution reaction performance of electrocatalysts, such as Fe1−yNiyS2@Fe1−xNixOOH microplatelets and SrBaNi2Fe12O22 powders. Meanwhile, we present an electrochemical conditioning approach to engineering the electrochemically active surface area of electrocatalysts, by which the resultant Fe1−yNiyS2@Fe1−xNixOOH microplatelets have a larger electrochemically active surface area after the electrochemical conditioning of the as-synthesized Fe1−yNiyS2 microplatelets using ammonia borane than those obtained after the conventional electrochemical conditioning without ammonia borane, presumably due to the appropriate conversion rate of Fe1−xNixOOH shells.

Microstructure and electrochemically active surface area of PtM/C electrocatalysts

2011 ◽  
Vol 47 (8) ◽  
pp. 933-939 ◽  
Author(s):  
V. E. Guterman ◽  
S. V. Belenov ◽  
T. A. Lastovina ◽  
E. P. Fokina ◽  
N. V. Prutsakova ◽  
...  
Keyword(s):  
Surface Area ◽  
Active Surface ◽  
Active Surface Area ◽  
Electrochemically Active ◽  
Electrochemically Active Surface

scholarly journals The effect of the composition of the dispersing medium of oxide sols on the electrocatalytic activity of sol-gel obtained RuO2-TiO2/Ti anodes

2001 ◽  
Vol 66 (11-12) ◽  
pp. 847-857 ◽  
Author(s):  
Dejan Mitrovic ◽  
Vladimir Panic ◽  
Aleksandar Dekanski ◽  
Slobodan Milonjic ◽  
Radoslav Atanasoski ◽  
...  
Keyword(s):  
Surface Area ◽  
Electrocatalytic Activity ◽  
Sol Gel ◽  
Active Surface ◽  
Proton Exchange ◽  
Alcohol Molecule ◽  
Active Surface Area ◽  
Electrochemically Active ◽  
Dispersing Medium ◽  
Electrochemically Active Surface

The influence of the addition of methanol, ethanol, 1-propanol and 2-propanol to the dispersing medium of amixture of RuO2 and TiO2 sols on the electrochemically active surface area for proton exchange, as well as on the electrocatalytic activity for the chlorine evolution reaction (CER) of RuO2-TiO2/Ti electrode obtained by sol-gel procedure was investigated. The electrochemically active surface area was examined by cyclic voltammetry, while the analysis of the activity for the CER was performed by polarization measurements. The stability of the obtained anode coatings was also checked by an accelerated stability test. The anode properties depend on the number of C atoms in the alcohol molecule, as well as on the elapsed time between the preparation of the sols/alcohol mixture and its application onto the titanium support. The addition of alcohol increased the activity of the anodes for the CER, compared to those prepared without the addition, but their stability was smaller.

scholarly journals Evaluation of the Electrochemically Active Surface Area of Microelectrodes by Capacitive and Faradaic Currents

2019 ◽  
Vol 6 (17) ◽  
pp. 4411-4417 ◽  
Author(s):  
Alina N. Sekretaryova ◽  
Mikhail Yu. Vagin ◽  
Anton V. Volkov ◽  
Igor V. Zozoulenko ◽  
Mats Eriksson
Keyword(s):  
Surface Area ◽  
Active Surface ◽  
Active Surface Area ◽  
Electrochemically Active ◽  
Electrochemically Active Surface

scholarly journals PtCo-excavated rhombic dodecahedral nanocrystals for efficient electrocatalysis

2020 ◽  
Vol 2 (10) ◽  
pp. 4881-4886
Author(s):  
Cong Shen ◽  
Xuemin Li ◽  
Yajing Wei ◽  
Zhenming Cao ◽  
Huiqi Li ◽  
...  
Keyword(s):  
Surface Area ◽  
Oxidation Reaction ◽  
Chemical Method ◽  
Active Surface ◽  
Methanol Oxidation Reaction ◽  
Active Surface Area ◽  
Wet Chemical Method ◽  
Electrochemically Active ◽  
Wet Chemical ◽  
Electrochemically Active Surface

We successfully synthesized excavated rhombic dodecahedral PtCo NCs using a wet chemical method. This structure and the alloy nature render the PtCo ERD NCs a large electrochemically active surface area and an excellent catalyst for OER and the methanol oxidation reaction.

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