Enhanced oxygen evolution activity on mesoporous cobalt-iron oxides

2021 ◽  
Author(s):  
Tianmi Tang ◽  
Qiaoqiao Zhang ◽  
Xue Bai ◽  
Zhenlu Wang ◽  
Jingqi Guan
Keyword(s):  
Renewable Energy ◽  
Environmental Pollution ◽  
Iron Oxides ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Energy Crisis ◽  
Fossil Energy ◽  
The Core ◽  
Cobalt Iron

To solve energy crisis and environmental pollution, the use of clean and renewable energy to replace fossil energy has become a top priority. Oxygen evolution reaction (OER) is the core...

Electrocatalytic Oxidation of Biomass-derived 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic acid Coupled with H2 Evolution

2021 ◽  
Vol 25 ◽  
Author(s):  
Ye Meng ◽  
Hu Li
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Oxidation ◽  
Value Added ◽  
Energy Crisis ◽  
Redox Mediators ◽  
Hydrogen Fuel ◽  
H2 Evolution ◽  
Fossil Energy ◽  
Furandicarboxylic Acid

: Simultaneous electrocatalytic conversion of biomass into high-value products and electrolysis of water for hydrogen are promising strategies to relieve the fossil energy crisis. Herein, we overview the recent advances and perspectives in the electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) and water reduction to synchronously produce value-added 2,5-furandicarboxylic acid (FDCA) and hydrogen fuel. Two strategies of bifunctional electrocatalysts and redox mediators are discussed. Oxidation of HME to FDCA was found to be more thermodynamically and kinetically favorable than the oxygen evolution reaction (OER). Moreover, the opportunities and challenges brought by them are presented.

Synergistic Enhancement by MoSx and Sulphate on Amorphous Polymetallic Oxides Nanosheets for Oxygen Evolution Reaction

2021 ◽  
Author(s):  
Yonghao Gan ◽  
Xiaoping Dai ◽  
Meilin Cui ◽  
Huihui Zhao ◽  
Fei Nie ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Energy Crisis ◽  
Energy Sources ◽  
Synergistic Enhancement ◽  
Stable Oxygen

To alleviate the energy crisis and achieve the transformation of renewable energy sources, developing low-cost, highly efficient and stable oxygen evolution reaction (OER) electrocatalysts for water splitting has aroused great...

First-Principles Investigation of Two-Dimensional Covalent Organic Frameworks Electrocatalysts for Oxygen Evolution/Reduction and Hydrogen Evolution Reactions

2021 ◽  
Author(s):  
Jing Ji ◽  
Cunjin Zhang ◽  
Shuaibo Qin ◽  
Peng Jin
Keyword(s):  
Renewable Energy ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
First Principles ◽  
Oxygen Evolution Reaction ◽  
Reduction Reaction ◽  
Two Dimensional ◽  
Energy Applications ◽  
Hydrogen Evolution Reactions

The oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and hydrogen evolution reaction (HER) all have attracted much attention due to their utmost importance for clean and renewable energy applications....

Cobalt iron phosphide nanoparticles embedded within a carbon matrix as highly efficient electrocatalysts for the oxygen evolution reaction

2019 ◽  
Vol 55 (62) ◽  
pp. 9212-9215 ◽  
Author(s):  
Jiang Han ◽  
Gen Chen ◽  
Xiaohe Liu ◽  
Ning Zhang ◽  
Shuquan Liang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Carbon Matrix ◽  
Iron Phosphide ◽  
Highly Efficient ◽  
Cobalt Iron ◽  
One Step ◽  
Double Hydroxides

Co3FePx/C nanocomposites were derived from one-step phosphorization of anthraquinone-2-sulfonate (AQS2) intercalated Co3Fe layered double hydroxides (Co3Fe LDHs).

Mesoporous cobalt‑iron based materials as highly efficient electrocatalysts for oxygen evolution reaction

2020 ◽  
Vol 873 ◽  
pp. 114443 ◽  
Author(s):  
Donggang Guo ◽  
Hongzhi Kang ◽  
Zewei Hao ◽  
Yang Yang ◽  
Pengkun Wei ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Highly Efficient ◽  
Cobalt Iron ◽  
Iron Based

scholarly journals CoFe–OH Double Hydroxide Films Electrodeposited on Ni-Foam as Electrocatalyst for the Oxygen Evolution Reaction

2020 ◽  
Vol 234 (5) ◽  
pp. 995-1019 ◽  
Author(s):  
Kirill Sliozberg ◽  
Yauhen Aniskevich ◽  
Ugur Kayran ◽  
Justus Masa ◽  
Wolfgang Schuhmann
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Current ◽  
Ni Foam ◽  
Active Electrode ◽  
Catalyst Film ◽  
Cobalt Iron ◽  
Electrochemically Deposited ◽  
Current Densities ◽  
Double Hydroxide

AbstractCobalt-iron double hydroxide (CoFe–OH) films were electrochemically deposited on 3D Ni foam electrodes for the oxygen evolution reaction (OER). The dependence of the OER activity on film composition and thickness was evaluated, which revealed an optimal Fe:Co ratio of about 1:2.33. The composition of the catalyst film was observed to vary with film thickness. The electrodeposition parameters were carefully controlled to yield microstructured Ni-foam decorated with CoFe–OH films of controlled thickness and composition. The most active electrode exhibited an overpotential as low as 360 mV OER at an industrial scale current density of 400 mA cm−2 that remained stable for at least 320 h. This work contributes towards the fabrication of practical electrodes with the focus on the development of stable electrodes for electrocatalytic oxygen evolution at high current densities.

Amorphous nickel-iron oxides/carbon nanohybrids for an efficient and durable oxygen evolution reaction

Nano Research ◽  
2017 ◽  
Vol 10 (11) ◽  
pp. 3629-3637 ◽  
Author(s):  
Bo Li ◽  
Shuangming Chen ◽  
Jie Tian ◽  
Ming Gong ◽  
Hangxun Xu ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Nickel Iron

scholarly journals Efficient Recovery of Lithium Cobaltate from Spent Lithium-Ion Batteries for Oxygen Evolution Reaction

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3343
Author(s):  
Ayesha Arif ◽  
Ming Xu ◽  
Jamshaid Rashid ◽  
Chaudry Sajed Saraj ◽  
Wei Li ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Citric Acid ◽  
Lithium Ion Batteries ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Lithium Ion ◽  
Average Particle ◽  
Lithium Cobaltate ◽  
Efficient Recovery

Owing to technological advancements and the ever-increasing population, the search for renewable energy resources has increased. One such attempt at finding effective renewable energy is recycling of lithium-ion batteries and using the recycled material as an electrocatalyst for the oxygen evolution reaction (OER) step in water splitting reactions. In electrocatalysis, the OER plays a crucial role and several electrocatalysts have been investigated to improve the efficiency of O2 gas evolution. Present research involves the use of citric acid coupled with lemon peel extracts for efficient recovery of lithium cobaltate from waste lithium-ion batteries and subsequent use of the recovered cathode material for OER in water splitting. Optimum recovery was achieved at 90 °C within 3 h of treatment with 1.5 M citric acid and 1.5% extract volume. The consequent electrode materials were calcined at 600, 700 and 800 °C and compared to the untreated waste material calcined at 600 °C for OER activity. The treated material recovered and calcined at 600 °C was the best among all of the samples for OER activity. Its average particle size was estimated to be within the 20–100 nm range and required a low overpotential of 0.55 V vs. RHE for the current density to reach 10 mA cm2 with a Tafel value of 128 mV/dec.

scholarly journals Challenges and Future Prospects of Graphene Based Hybrids for Solar Fuel Generation: Moving Towards the Next Generation Photocatalysts

2021 ◽  
Author(s):  
Bramhaiah Kommula ◽  
Santanu Bhattacharyya
Keyword(s):  
Renewable Energy ◽  
Environmental Pollution ◽  
Fossil Fuels ◽  
Energy Resources ◽  
Energy Crisis ◽  
Next Generation ◽  
Renewable Energy Resources ◽  
Future Prospects ◽  
Solar Fuel ◽  
Global Energy

Considering the current global energy crisis and the most alarming environmental pollution issues, moving towards renewable energy resources instead of fossil fuels, should be the ultimate goal of modern civilization....

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