scholarly journals Electrodeposited Nanostructured CoFe2O4 for Overall Water Splitting and Supercapacitor Applications

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 176 ◽  
Author(s):  
Chunyang Zhang ◽  
Sanket Bhoyate ◽  
Chen Zhao ◽  
Pawan Kahol ◽  
Nikolaos Kostoglou ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
High Specific Capacitance ◽  
Storage Devices ◽  
Energy Devices ◽  
Overall Water Splitting ◽  
Storage Behavior ◽  
One Step ◽  
And Storage

To contribute to solving global energy problems, a multifunctional CoFe2O4 spinel was synthesized and used as a catalyst for overall water splitting and as an electrode material for supercapacitors. The ultra-fast one-step electrodeposition of CoFe2O4 over conducting substrates provides an economic pathway to high-performance energy devices. Electrodeposited CoFe2O4 on Ni-foam showed a low overpotential of 270 mV and a Tafel slope of 31 mV/dec. The results indicated a higher conductivity for electrodeposited compared with dip-coated CoFe2O4 with enhanced device performance. Moreover, bending and chronoamperometry studies suggest excellent durability of the catalytic electrode for long-term use. The energy storage behavior of CoFe2O4 showed high specific capacitance of 768 F/g at a current density of 0.5 A/g and maintained about 80% retention after 10,000 cycles. These results demonstrate the competitiveness and multifunctional applicability of the CoFe2O4 spinel to be used for energy generation and storage devices.

Facile construction of self-supported Fe-doped Ni3S2 nanoparticle arrays for ultralow-overpotential oxygen evolution reaction

Nanoscale ◽  
2020 ◽  
Author(s):  
Ning Xie ◽  
Dong-Dong Ma ◽  
Xintao Wu ◽  
Qi-Long Zhu
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Cost Effective ◽  
Nanoparticle Arrays ◽  
Overall Water Splitting ◽  
Construction Of Self ◽  
One Step

Constructing high-performance and cost-effective electrocatalysts for water oxidation, particularly for overall water splitting is extremely needed, whereas still challenging. Herein, based on an economical and facile one-step surface sulfurization strategy,...

Ir-based bifunctional electrocatalysts for overall water splitting

2021 ◽  
Author(s):  
Lin-Wei Chen ◽  
Hai-Wei Liang
Keyword(s):  
Hydrogen Production ◽  
Energy Conversion ◽  
Water Splitting ◽  
High Purity ◽  
High Performance ◽  
Overall Water Splitting ◽  
Bifunctional Electrocatalysts ◽  
Energy Conversion And Storage ◽  
And Storage ◽  
High Purity Hydrogen

High-purity hydrogen production by electrocatalytic overall water splitting plays an important role in energy conversion and storage. The development of high-performance bifunctional electrocatalysts that could simultaneously catalyze the cathodic hydrogen...

Ultrathin Ir nanowires as high-performance electrocatalysts for efficient water splitting in acidic media

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 1892-1897 ◽  
Author(s):  
Luhong Fu ◽  
Fulin Yang ◽  
Gongzhen Cheng ◽  
Wei Luo
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Acidic Media ◽  
Term Stability ◽  
Long Term Stability ◽  
Overall Water Splitting ◽  
Chemical Approach ◽  
Wet Chemical ◽  
Attachment Mechanism

Ultrathin Ir wavy nanowires with a diameter of 1.7 nm are prepared by a simple wet-chemical approach through a nanoparticle attachment mechanism, and further used as electrocatalysts due to their superior activity and long-term stability toward overall water splitting in acidic media.

scholarly journals One-Step and Morphology-Controlled Synthesis of Ni-Co Binary Hydroxide on Nickel Foam for High-Performance Supercapacitors

2020 ◽  
Vol 10 (11) ◽  
pp. 3814
Author(s):  
Xiao Fan ◽  
Per Ohlckers ◽  
Xuyuan Chen
Keyword(s):  
High Performance ◽  
Nickel Foam ◽  
Rate Capability ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
One Step ◽  
Binder Free ◽  
Current Densities ◽  
Binary Material

Ni-Co binary hydroxide grown on nickel foam was synthesized through a facile one-step process for pseudocapacitive electrode application. The morphology of the fabricated binary hydroxide, evolving from nanosheet to nanowire, was highly controllable by tuning the Ni:Co ratio. In systematical electrochemical measurements, the prepared binary material on nickel foam could be employed as a binder-free working electrode directly. The optimal composition obtained at the Ni:Co ratio of 5:5 in integrated nanosheet/nanowire geometry exhibited high specific capacitances of 2807 and 2222 F/g at current densities of 1 and 20 A/g, equivalent to excellent rate capability. The capacitance loss was 19.8% after 2000 cycles, demonstrating good long-term cyclic stability. The outstanding supercapacitors behaviors benefited from unique structure and synergistic contributions, indicating the great potential of the obtained binary hydroxide electrode for high-performance energy storage devices.

In situ formation of highly exposed NiPS3 nanosheets on nickel foam as an efficient 3D electrocatalyst for overall water splitting

2021 ◽  
Author(s):  
Liang Fang ◽  
Yanping Xie ◽  
Peiyin Guo ◽  
Jingpei Zhu ◽  
Shuhui Xiao ◽  
...  
Keyword(s):  
Water Splitting ◽  
Nickel Foam ◽  
Chemical Vapor ◽  
Bifunctional Catalyst ◽  
Vapor Transport ◽  
Chemical Vapor Transport ◽  
Overall Water Splitting ◽  
One Step ◽  
Transport Method

Vertical NiPS3 nanosheets in situ grown on conducting nickel foam were fabricated by a facile one-step chemical vapor transport method and used as an efficient bifunctional catalyst for overall water splitting.

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