scholarly journals A Cobalt–Iron Double-Atom Catalyst for the Oxygen Evolution Reaction

2019 ◽  
Vol 141 (36) ◽  
pp. 14190-14199 ◽  
Author(s):  
Lichen Bai ◽  
Chia-Shuo Hsu ◽  
Duncan T. L. Alexander ◽  
Hao Ming Chen ◽  
Xile Hu
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Cobalt Iron

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.

scholarly journals A Cobalt-Iron Double-Atom Catalyst for the Oxygen Evolution Reaction

2019 ◽  
Author(s):  
Lichen Bai ◽  
Chia-Shuo Hsu ◽  
Duncan Alexander ◽  
Hao Ming Chen ◽  
Xile Hu
Keyword(s):  
Oxygen Evolution ◽  
Active Site ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Single Atom ◽  
X Ray ◽  
Highly Active ◽  
Cobalt Iron ◽  
X Ray Absorption

Single atom catalysts exhibit well-defined active sites and potentially maximum atomic efficiency. However, they are unsuitable for reactions that benefit from bimetallic promotion such as the oxygen evolution reaction (OER) in alkaline medium. Here we show that a single atom Co precatalyst can be in-situ transformed into a Co-Fe double atom catalyst for OER. This catalyst exhibits one of the highest turnover frequencies among metal oxides. Electrochemical, microscopic, and spectroscopic data including those from operando X-ray absorption spectroscopy, reveal a dimeric Co-Fe moiety as the active site of the catalyst. This work demonstrates double-atom catalysis as a promising approach for the developed of defined and highly active OER catalysts.

Tracking high-valent surface iron species in the oxygen evolution reaction on cobalt iron (oxy)hydroxides

2021 ◽  
Author(s):  
Seunghwa Lee ◽  
Aliki Moysiadou ◽  
You-Chiuan Chu ◽  
Hao Ming Chen ◽  
Xile Hu
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Renewable Electricity ◽  
Iron Species ◽  
Iron Oxyhydroxides ◽  
Surface Iron ◽  
Cobalt Iron ◽  
High Valent

The oxygen evolution reaction (OER) is the bottleneck reaction of water splitting, which can be used to generate green hydrogen from renewable electricity. Cobalt iron oxyhydroxides (CoFeOxHy) are among the...

Amorphous multinary phyllosilicate catalysts for electrochemical water oxidation

2019 ◽  
Vol 7 (31) ◽  
pp. 18380-18387
Author(s):  
Byunghoon Kim ◽  
Ju Seong Kim ◽  
Hyunah Kim ◽  
Inchul Park ◽  
Won Mo Seong ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Chemical Space ◽  
Cobalt Iron

For the high-performance oxygen evolution reaction catalysts, we introduce amorphous cobalt–iron phyllosilicates (ACFPs), which explore the chemical space of phyllosilicate materials.

Sea urchin-like cobalt–iron phosphide as an active catalyst for oxygen evolution reaction

Nanoscale ◽  
2016 ◽  
Vol 8 (6) ◽  
pp. 3244-3247 ◽  
Author(s):  
Adriana Mendoza-Garcia ◽  
Dong Su ◽  
Shouheng Sun
Keyword(s):  
Oxygen Evolution ◽  
Sea Urchin ◽  
Oxygen Evolution Reaction ◽  
Active Catalyst ◽  
Iron Phosphide ◽  
Cobalt Iron

scholarly journals Cover Feature: Cobalt−Iron Pyrophosphate Porous Nanosheets as Highly Active Electrocatalysts for the Oxygen Evolution Reaction (ChemElectroChem 1/2018)

2017 ◽  
Vol 5 (1) ◽  
pp. 3-3
Author(s):  
Miaomiao Liu ◽  
Zhengyi Qu ◽  
Deqin Yin ◽  
Xiaojuan Chen ◽  
Yajie Zhang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Highly Active ◽  
Porous Nanosheets ◽  
Cobalt Iron

scholarly journals A Cobalt-Iron Double-Atom Catalyst for the Oxygen Evolution Reaction

2019 ◽  
Author(s):  
Lichen Bai ◽  
Chia-Shuo Hsu ◽  
Duncan Alexander ◽  
Hao Ming Chen ◽  
Xile Hu
Keyword(s):  
Oxygen Evolution ◽  
Active Site ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Single Atom ◽  
X Ray ◽  
Highly Active ◽  
Cobalt Iron ◽  
X Ray Absorption

Single atom catalysts exhibit well-defined active sites and potentially maximum atomic efficiency. However, they are unsuitable for reactions that benefit from bimetallic promotion such as the oxygen evolution reaction (OER) in alkaline medium. Here we show that a single atom Co precatalyst can be in-situ transformed into a Co-Fe double atom catalyst for OER. This catalyst exhibits one of the highest turnover frequencies among metal oxides. Electrochemical, microscopic, and spectroscopic data including those from operando X-ray absorption spectroscopy, reveal a dimeric Co-Fe moiety as the active site of the catalyst. This work demonstrates double-atom catalysis as a promising approach for the developed of defined and highly active OER catalysts.

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