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.

Controllable growth of graphdiyne layered nanosheets for high-performance water oxidation

2021 ◽  
Author(s):  
Shuya Zhao ◽  
Yurui Xue ◽  
Zhongqiang Wang ◽  
Zhiqiang Zheng ◽  
Xiaoyu Luan ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Low Cost ◽  
Highly Active ◽  
Controllable Growth

Developing highly active, stable and low-cost electrocatalysts capable of an efficient oxygen evolution reaction (OER) is urgent and challenging.

scholarly journals A Highly Active Oxygen Evolution Catalyst for Lithium-Oxygen Batteries Enabled by High-Surface-Energy Facets

Joule ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 1511-1521 ◽  
Author(s):  
Nien-Chu Lai ◽  
Guangtao Cong ◽  
Zhuojian Liang ◽  
Yi-Chun Lu
Keyword(s):  
Surface Energy ◽  
Oxygen Evolution ◽  
High Surface ◽  
Active Oxygen ◽  
Highly Active ◽  
High Surface Energy ◽  
Lithium Oxygen Batteries

Highly active oxygen evolution reaction electrocatalyst based on defective-CeO2-x decorated MOF(Ni/Fe)

2021 ◽  
pp. 139630
Author(s):  
Miaomiao Wu ◽  
Yi Zhang ◽  
Renyuan Zhang ◽  
Jiwei Ma ◽  
Nicolas Alonso-Vante
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Active Oxygen ◽  
Highly Active

scholarly journals Highly active oxygen evolution integrated with efficient CO2 to CO electroreduction

2019 ◽  
Vol 116 (48) ◽  
pp. 23915-23922 ◽  
Author(s):  
Yongtao Meng ◽  
Xiao Zhang ◽  
Wei-Hsuan Hung ◽  
Junkai He ◽  
Yi-Sheng Tsai ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Water Oxidation ◽  
Iron Hydroxide ◽  
Fuel Efficiency ◽  
Cell Voltage ◽  
Electrical Energy ◽  
Reduction Reaction ◽  
Faradaic Efficiency ◽  
Nickel Iron ◽  
Highly Active

Electrochemical reduction of CO2 to useful chemicals has been actively pursued for closing the carbon cycle and preventing further deterioration of the environment/climate. Since CO2 reduction reaction (CO2RR) at a cathode is always paired with the oxygen evolution reaction (OER) at an anode, the overall efficiency of electrical energy to chemical fuel conversion must consider the large energy barrier and sluggish kinetics of OER, especially in widely used electrolytes, such as the pH-neutral CO2-saturated 0.5 M KHCO3. OER in such electrolytes mostly relies on noble metal (Ir- and Ru-based) electrocatalysts in the anode. Here, we discover that by anodizing a metallic Ni–Fe composite foam under a harsh condition (in a low-concentration 0.1 M KHCO3 solution at 85 °C under a high-current ∼250 mA/cm2), OER on the NiFe foam is accompanied by anodic etching, and the surface layer evolves into a nickel–iron hydroxide carbonate (NiFe-HC) material composed of porous, poorly crystalline flakes of flower-like NiFe layer-double hydroxide (LDH) intercalated with carbonate anions. The resulting NiFe-HC electrode in CO2-saturated 0.5 M KHCO3 exhibited OER activity superior to IrO2, with an overpotential of 450 and 590 mV to reach 10 and 250 mA/cm2, respectively, and high stability for >120 h without decay. We paired NiFe-HC with a CO2RR catalyst of cobalt phthalocyanine/carbon nanotube (CoPc/CNT) in a CO2 electrolyzer, achieving selective cathodic conversion of CO2 to CO with >97% Faradaic efficiency and simultaneous anodic water oxidation to O2. The device showed a low cell voltage of 2.13 V and high electricity-to-chemical fuel efficiency of 59% at a current density of 10 mA/cm2.

scholarly journals Cobalt Amide Imidate Imidazolate Frameworks as Highly Active Oxygen Evolution Model Materials

2019 ◽  
Vol 2 (12) ◽  
pp. 8930-8938 ◽  
Author(s):  
Alberto Bucci ◽  
Suvendu Sekhar Mondal ◽  
Vlad Martin-Diaconescu ◽  
Alexandr Shafir ◽  
Julio Lloret-Fillol
Keyword(s):  
Oxygen Evolution ◽  
Active Oxygen ◽  
Evolution Model ◽  
Highly Active

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.

Imidazolate-mediated assembled structures of Co-LDH sheets for efficient electrocatalytic oxygen evolution

2018 ◽  
Vol 6 (11) ◽  
pp. 4636-4641 ◽  
Author(s):  
Liyong Chen ◽  
Yuting Guo ◽  
Huifang Wang ◽  
Zhizhi Gu ◽  
Yingyue Zhang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Active Oxygen ◽  
Synthetic Route ◽  
Highly Active

To fully achieve an eco-friendly means of storing electricity in the form of chemical fuels, the development of a green synthetic route towards highly active oxygen evolution reaction (OER) electrocatalysts is required.

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