High-performance overall water splitting based on amorphous iron doped cobalt tungstate via facile co-precipitation

2021 ◽  
Vol 9 (15) ◽  
pp. 9753-9760
Author(s):  
Jin Wu ◽  
Renjie Xie ◽  
Xiangchen Hu ◽  
Zhiwei Nie ◽  
Yanuo Shi ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
High Performance ◽  
Amorphous Iron ◽  
Bifunctional Electrocatalyst ◽  
Overall Water Splitting ◽  
Iron Doped ◽  
Cobalt Tungstate ◽  
Co Precipitation ◽  
A Current

The as-prepared amorphous Fe-doped CoWO4 bifunctional electrocatalyst shows a low overpotential of 259 and 118 mV to reach a current density of 10 mA cm−2 for the OER and HER in 1 M KOH, respectively.

Iron doped cobalt phosphide ultrathin nanosheets on nickel foam for overall water splitting

2019 ◽  
Vol 7 (36) ◽  
pp. 20658-20666 ◽  
Author(s):  
Ying Li ◽  
Fumin Li ◽  
Yue Zhao ◽  
Shu-Ni Li ◽  
Jing-Hui Zeng ◽  
...  
Keyword(s):  
Water Splitting ◽  
Nickel Foam ◽  
Alkaline Electrolyte ◽  
Bifunctional Electrocatalyst ◽  
Ultrathin Nanosheets ◽  
Cobalt Phosphide ◽  
Overall Water Splitting ◽  
Iron Doped

Iron doped cobalt phosphide ultrathin nanosheets on nickel foam are used as a bifunctional electrocatalyst for overall water splitting in alkaline electrolyte.

An advanced and highly efficient Ce assisted NiFe-LDH electrocatalyst for overall water splitting

2020 ◽  
Vol 4 (1) ◽  
pp. 312-323 ◽  
Author(s):  
Harsharaj S. Jadhav ◽  
Animesh Roy ◽  
Bezawit Z. Desalegan ◽  
Jeong Gil Seo
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Room Temperature ◽  
Cell Voltage ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
A Cell ◽  
A Current

A room-temperature synthesized NiFeCe2 electrocatalyst delivered a current density of 10 mA cm−2 at a cell voltage of 1.59 V when used as the electrolyzer.

Efficient bifunctional catalysts for overall water splitting: porous Fe–Mo oxide hybrid nanorods

Nanoscale ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 7116-7123 ◽  
Author(s):  
Wei Chen ◽  
Guangfu Qian ◽  
Qinglian Xu ◽  
Chen Yu ◽  
Mengya Yu ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Water Splitting ◽  
Current Density ◽  
Bifunctional Catalysts ◽  
Binary Metal ◽  
Overall Water Splitting ◽  
Binary Metal Oxide ◽  
A Current

In this work, binary metal oxide porous nanorods are synthesized and exhibit evidently small overpotentials for OER and HER. They also display remarkable stability by holding a current density of ±200 mA cm−2 for 85 h for OER/HER.

Tailoring the facets of Ni3S2 as a bifunctional electrocatalyst for high-performance overall water-splitting

2019 ◽  
Vol 7 (30) ◽  
pp. 18003-18011 ◽  
Author(s):  
Lingjie Li ◽  
Caiyun Sun ◽  
Bo Shang ◽  
Qing Li ◽  
Jinglei Lei ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Bifunctional Electrocatalyst ◽  
Overall Water Splitting ◽  
Electrocatalytic Performance ◽  
Zigzag Structure

{1̄11} faceted Ni3S2 with an asymmetric zigzag structure is elaborately designed and fabricated, which exhibits remarkable electrocatalytic performance for the HER and OER.

Fabrication of (Ni,Co)0.85Se nanosheet arrays derived from layered double hydroxides toward largely enhanced overall water splitting

2018 ◽  
Vol 6 (17) ◽  
pp. 7585-7591 ◽  
Author(s):  
Kaiming Xiao ◽  
Lei Zhou ◽  
Mingfei Shao ◽  
Min Wei
Keyword(s):  
Water Splitting ◽  
Layered Double Hydroxides ◽  
High Performance ◽  
Bifunctional Electrocatalyst ◽  
Overall Water Splitting ◽  
Nanosheet Arrays ◽  
Double Hydroxides

A high-performance and durable bifunctional electrocatalyst based on (Ni,Co)0.85Se nanosheet arrays toward overall water splitting.

Photothermal coupling electrolysis on Ni–W–B toward practical overall water splitting

2019 ◽  
Vol 7 (20) ◽  
pp. 12440-12445 ◽  
Author(s):  
Weiju Hao ◽  
Renbing Wu ◽  
Hongyuan Yang ◽  
Yanhui Guo
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Photothermal Effect ◽  
Carbon Cloth ◽  
Cell Temperature ◽  
Overall Water Splitting ◽  
A Current

An overall water splitting device assembled using a photothermal effect coupled Ni–W–B/carbon cloth electrode could deliver a current density of 25 mA cm−2 at an ultralow cell voltage of 1.524 V without heating the whole system, which is comparable to its performance at an elevated cell temperature of 50 °C.

scholarly journals Electrochemical Performance of Iron-Doped Cobalt Oxide Hierarchical Nanostructure

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2176
Author(s):  
Deepa Guragain ◽  
Sunil Karna ◽  
Jonghyun Choi ◽  
Romakanta Bhattarai ◽  
Tej P. Poudel ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Cobalt Oxide ◽  
Water Splitting ◽  
Current Density ◽  
Density Functional ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Iron Doped ◽  
A Current

In this study, hydrothermally produced Fe-doped Co3O4 nanostructured particles are investigated as electrocatalysts for the water-splitting process and electrode materials for supercapacitor devices. The results of the experiments demonstrated that the surface area, specific capacitance, and electrochemical performance of Co3O4 are all influenced by Fe3+ content. The FexCo3-xO4 with x = 1 sample exhibits a higher BET surface (87.45 m2/g) than that of the pristine Co3O4 (59.4 m2/g). Electrochemical measurements of the electrode carried out in 3 M KOH reveal a high specific capacitance of 153 F/g at a current density of 1 A/g for x = 0.6 and 684 F/g at a 2 mV/s scan rate for x = 1.0 samples. In terms of electrocatalytic performance, the electrode (x = 1.0) displayed a low overpotential of 266 mV (at a current density of 10 mA/cm2) along with 52 mV/dec Tafel slopes in the oxygen evolution reaction. Additionally, the overpotential of 132 mV (at a current density of 10 mA/cm2) and 109 mV with 52 mV/dec Tafel slope were obtained for x = 0.6 sample towards hydrogen evolution reaction (HER). According to electrochemical impedance spectroscopy (EIS) measurements and the density functional theory (DFT) study, the addition of Fe3+ increased the conductivity at the electrode–electrolyte interface, which substantially impacted the high activity of the iron-doped cobalt oxide. The electrochemical results revealed that the mesoporous Fe-doped Co3O4 nanostructure could be used as potential electrode material in the high-performance electrochemical capacitor and water-splitting catalysts.

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