scholarly journals Understanding the formation of bulk- and surface-active layered (oxy)hydroxides for water oxidation starting from a cobalt selenite precursor

2020 ◽  
Vol 13 (10) ◽  
pp. 3607-3619
Author(s):  
Jan Niklas Hausmann ◽  
Stefan Mebs ◽  
Konstantin Laun ◽  
Ingo Zebger ◽  
Holger Dau ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Structural Properties ◽  
Oxygen Evolution ◽  
Water Oxidation ◽  
Active Oxygen ◽  
Near Surface ◽  
Surface Active

Starting from a cobalt selenite precatalyst, we obtained a bulk and a near-surface active oxygen evolution catalyst and connected their structural properties to the precatalyst structure, the transformation conditions, and the catalytic activity.

Rutile TiO2 single crystals delivering enhanced photocatalytic oxygen evolution performance

Nanoscale ◽  
2021 ◽  
Author(s):  
Bing Fu ◽  
Zhijiao Wu ◽  
Kai Guo ◽  
Lingyu Piao
Keyword(s):  
Catalytic Activity ◽  
Single Crystals ◽  
Oxygen Evolution ◽  
Water Oxidation ◽  
Charge Separation ◽  
High Surface ◽  
Rutile Tio2 ◽  
Highly Efficient ◽  
Photogenerated Charge Separation

Owing to their scientific and technological importance, the development of highly efficient photocatalytic water oxidation systems with rapid photogenerated charge separation and high surface catalytic activity has highly desirable for...

Electrochemical tuning of olivine-type lithium transition-metal phosphates as efficient water oxidation catalysts

2015 ◽  
Vol 8 (6) ◽  
pp. 1719-1724 ◽  
Author(s):  
Yayuan Liu ◽  
Haotian Wang ◽  
Dingchang Lin ◽  
Chong Liu ◽  
Po-Chun Hsu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Oxygen Evolution ◽  
Water Oxidation ◽  
Oxidation Catalysts ◽  
Metal Phosphates ◽  
Electrochemical Tuning

Electrochemical lithium tuning of olivine-type lithium transition metal phosphates results in greatly enhanced oxygen evolution catalytic activity.

Ultrathin amorphous cobalt–vanadium hydr(oxy)oxide catalysts for the oxygen evolution reaction

2018 ◽  
Vol 11 (7) ◽  
pp. 1736-1741 ◽  
Author(s):  
Juzhe Liu ◽  
Yongfei Ji ◽  
Jianwei Nai ◽  
Xiaogang Niu ◽  
Yi Luo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Oxide Catalysts ◽  
Simple Strategy

A simple strategy to synthesize ultrathin, amorphous and alloyed structural cobalt–vanadium hydr(oxy)oxide catalysts with enhanced water oxidation catalytic activity.

scholarly journals Template-free synthesis of mesoporous manganese oxides with catalytic activity in the oxygen evolution reaction

2017 ◽  
Vol 1 (4) ◽  
pp. 780-788 ◽  
Author(s):  
Suoyuan Lian ◽  
Michelle P. Browne ◽  
Carlota Domínguez ◽  
Serban N. Stamatin ◽  
Hugo Nolan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Manganese Oxides ◽  
Template Free ◽  
Highly Porous

Solvothermally synthesised MnCO3 leads to template-free formation of highly porous, defect-rich MnO2 with high activity in water oxidation.

NaBH4-Reduction Induced Tunable Oxygen Vacancies in LaNiO2.7 to Enhance the Oxygen Evolution Reaction

2021 ◽  
Author(s):  
Yuwei Jin ◽  
Wenjing Huo ◽  
Libin Zhang ◽  
Yong Li ◽  
Qianqian Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Theoretical Prediction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Oxygen Vacancies ◽  
Time Stability ◽  
Long Time ◽  
Nabh4 Reduction ◽  
Reduction Approach

The tunable oxygen vacancies of LaNiO3 (LNO-Vo) is realized by the theoretical prediction and NaBH4-reduction approach. The LNO2.7 catalyst exhibits superior catalytic activity and long-time stability for water oxidation. A...

The effect of different metal oxides on the catalytic activity of a Co3O4 catalyst for toluene combustion: importance of the structure–property relationship and surface active species

2019 ◽  
Vol 43 (27) ◽  
pp. 10868-10877 ◽  
Author(s):  
Xuejun Zhang ◽  
Min Zhao ◽  
Zhongxian Song ◽  
Heng Zhao ◽  
Wei Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Oxides ◽  
Catalytic Oxidation ◽  
Active Species ◽  
Active Oxygen ◽  
Redox Cycle ◽  
Structure Property ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Surface Active

The Co–La catalyst was used to the catalytic oxidation of toluene. The LaCoO3 perovskite was detected. The abundance of Co3+ and active oxygen contributed synergistically to the redox cycle reaction, which could improve the catalytic activity.

Highly-active oxygen evolution electrocatalyzed by an Fe-doped NiCr2O4 nanoparticle film

2018 ◽  
Vol 54 (43) ◽  
pp. 5462-5465 ◽  
Author(s):  
Jinxiu Zhao ◽  
Xianghong Li ◽  
Guanwei Cui ◽  
Xuping Sun
Keyword(s):  
Oxygen Evolution ◽  
Water Oxidation ◽  
Active Oxygen ◽  
Ni Foam ◽  
Highly Active ◽  
Nanoparticle Film

An Fe-doped NiCr2O4 nanoparticle film on Ni foam (Fe–NiCr2O4/NF) acts as a durable water oxidation electrocatalyst with superior activity, needing an overpotential of 318 mV to drive 500 mA cm−2 in 1.0 M KOH.

Modelling an electrochemically roughened porous platinum electrode for water oxidation

2016 ◽  
Vol 52 (21) ◽  
pp. 4068-4071 ◽  
Author(s):  
Alexander Weremfo ◽  
Xunyu Lu ◽  
Paul Carter ◽  
D. Brynn Hibbert ◽  
Chuan Zhao
Keyword(s):  
Catalytic Activity ◽  
Central Composite Design ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Platinum Electrode ◽  
Pt Electrode ◽  
Central Composite

The use of a central composite design to model the roughness of an electrochemically roughened Pt electrode and the surface with a well-defined nanostructure exhibits greatly improved catalytic activity towards oxygen evolution reaction.

Highly Active Oxygen Evolution Electrocatalysts Based on Cobalt Amide Imidate Imidazolate Frameworks

2019 ◽  
Author(s):  
Alberto Bucci ◽  
Suvendu Sekhar Mondal ◽  
Vlad Martin-Diaconescu ◽  
Alexandr Shafir ◽  
Julio Lloret-Fillol
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Solvothermal Method ◽  
Active Species ◽  
Active Oxygen ◽  
Ex Situ ◽  
Highly Active ◽  
Small Change

<p>A family of three imidazolate-based Co-MOFs, IFP-5, -8 and -10 (Imidazolate Framework Potsdam), with different peripheral group –R (-Me, -OMe and –OEt, respectively) have been synthesized by a solvothermal method and tested toward oxygen evolution reaction (OER). Remarkably, IFP-8 presents low overpotentials (319 mV at 10 mA/cm<sup>2</sup>, and 490 mV at 500 mA/cm<sup>2</sup>) and extraordinary stability during 120 h, even when used as a catalyst toward overall water splitting reaction. An integrated <i>ex-situ</i> spectroscopic study, based on PXRD, EXAFS, and ATR, allows the identification of the active species and the factors that rule the catalytic activity. Indeed, it was found that the performances are highly affected by the nature of the -R group, because this small change strongly influences the conversion of the initial MOF to the active species. As a consequence, the remarkable activity of IFP-8 can be ascribed to the formation of Co(O)OH phase of few nanometers particle size (3-10 nm) during the electrocatalytic oxygen evolution. </p>

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