Efficient electrocatalytic oxygen evolution at ultra-high current densities over 3D Fe, N doped Ni(OH)2 nanosheets

2020 ◽  
Author(s):  
Pu Shi ◽  
Xiaodi Cheng ◽  
Siliu Lyu
Keyword(s):  
Oxygen Evolution ◽  
High Current ◽  
Current Densities

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.

A strongly coupled 3D ternary Fe2O3@Ni2P/Ni(PO3)2 hybrid for enhanced electrocatalytic oxygen evolution at ultra-high current densities

2019 ◽  
Vol 7 (3) ◽  
pp. 965-971 ◽  
Author(s):  
Xiaodi Cheng ◽  
Zhiyan Pan ◽  
Chaojun Lei ◽  
Yangjun Jin ◽  
Bin Yang ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Oxygen Evolution ◽  
Synergistic Effects ◽  
High Current ◽  
Strongly Coupled ◽  
Highly Active ◽  
Current Densities

A ternary Fe2O3@Ni2P/Ni(PO3)2 hybrid with strong coupling and synergistic effects was developed for highly active OER at ultra-high current densities.

Hollow nanocubes composed of well-dispersed mixed metal-rich phosphides in N-doped carbon as highly efficient and durable electrocatalysts for the oxygen evolution reaction at high current densities

2017 ◽  
Vol 5 (37) ◽  
pp. 19656-19663 ◽  
Author(s):  
Lei Zhang ◽  
Chun Chang ◽  
Chan-Wei Hsu ◽  
Chih-Wen Chang ◽  
Shih-Yuan Lu
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Current ◽  
Mixed Metal ◽  
Highly Efficient ◽  
Current Densities

A MOF-derived and SiO2-protected phosphorization approach was developed to prepare N-doped C/Ni5P4/Fe3P hollow nanocubes as highly efficient OER electrocatalysts.

scholarly journals A Superaerophobic Bimetallic Selenides Heterostructure for Efficient Industrial-Level Oxygen Evolution at Ultra-High Current Densities

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Jiaxin Yuan ◽  
Xiaodi Cheng ◽  
Hanqing Wang ◽  
Chaojun Lei ◽  
Sameer Pardiwala ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Active Sites ◽  
Electronic Conductivity ◽  
Three Dimensional ◽  
Active Surface ◽  
Alkaline Media ◽  
Active Surface Area ◽  
High Current ◽  
High Electronic Conductivity ◽  
Current Densities

AbstractCost-effective and stable electrocatalysts with ultra-high current densities for electrochemical oxygen evolution reaction (OER) are critical to the energy crisis and environmental pollution. Herein, we report a superaerophobic three dimensional (3D) heterostructured nanowrinkles of bimetallic selenides consisting of crystalline NiSe2 and NiFe2Se4 grown on NiFe alloy (NiSe2/NiFe2Se4@NiFe) prepared by a thermal selenization procedure. In this unique 3D heterostructure, numerous nanowrinkles of NiSe2/NiFe2Se4 hybrid with a thickness of ~ 100 nm are grown on NiFe alloy in a uniform manner. Profiting by the large active surface area and high electronic conductivity, the superaerophobic NiSe2/NiFe2Se4@NiFe heterostructure exhibits excellent electrocatalytic activity and durability towards OER in alkaline media, outputting the low potentials of 1.53 and 1.54 V to achieve ultra-high current densities of 500 and 1000 mA cm−2, respectively, which is among the most active Ni/Fe-based selenides, and even superior to the benchmark Ir/C catalyst. The in-situ derived FeOOH and NiOOH species from NiSe2/NiFe2Se4@NiFe are deemed to be efficient active sites for OER.

scholarly journals A Newly Designed Titanium Anode for Oxygen Evolution at High Current Densities

1993 ◽  
Vol 61 (7) ◽  
pp. 802-804
Author(s):  
Yoichi KAMEGAYA ◽  
Kouki SASAKI ◽  
Masayuki OGURI ◽  
Tomoyoshi ASAKI ◽  
Takashi MITAMURA
Keyword(s):  
Oxygen Evolution ◽  
High Current ◽  
Titanium Anode ◽  
Current Densities

β-like FeOOH Nanoswords Activated by Ni Foam and Encapsulated by rGO toward High Current Densities, Durability, and Efficient Oxygen Evolution

2021 ◽  
Vol 13 (16) ◽  
pp. 18772-18783
Author(s):  
Nishad G. Deshpande ◽  
Dong Su Kim ◽  
Cheol Hyoun Ahn ◽  
Sung Hyeon Jung ◽  
Young Been Kim ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
High Current ◽  
Ni Foam ◽  
Current Densities

Dealloying Ni-Co-Se Electrocatalysts for Efficient and Stable Oxygen Evolution at High Current Densities

2021 ◽  
Vol MA2021-01 (46) ◽  
pp. 1848-1848
Author(s):  
Jehad Abed ◽  
Steven Thorpe ◽  
Edward Sargent
Keyword(s):  
Oxygen Evolution ◽  
High Current ◽  
Stable Oxygen ◽  
Current Densities
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