Regulating Water-Reduction Kinetics in Cobalt Phosphide for Enhancing HER Catalytic Activity in Alkaline Solution

2017 ◽  
Vol 29 (28) ◽  
pp. 1606980 ◽  
Author(s):  
Kun Xu ◽  
Hui Ding ◽  
Mengxing Zhang ◽  
Min Chen ◽  
Zikai Hao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Alkaline Solution ◽  
Reduction Kinetics ◽  
Water Reduction ◽  
Cobalt Phosphide

Monocrystalline platinum–nickel branched nanocages with enhanced catalytic performance towards the hydrogen evolution reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 5072-5077 ◽  
Author(s):  
Zhenming Cao ◽  
Huiqi Li ◽  
Chenyang Zhan ◽  
Jiawei Zhang ◽  
Wei Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Catalytic Performance ◽  
Enhanced Stability

Monocrystalline Pt–Ni nanocages were successfully fabricated and exhibited great catalytic activity and enhanced stability for HER in alkaline solution.

Porous Monolithic Electrode of Ni3FeN on 3D Graphene for Efficient Oxygen Evolution

2020 ◽  
Vol 20 (8) ◽  
pp. 5175-5181 ◽  
Author(s):  
Ruiqing Li ◽  
Chenyang Xu ◽  
Xiangfen Jiang ◽  
Yoshio Bando ◽  
Xuebin Wang
Keyword(s):  
Electrical Conductivity ◽  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Alkaline Solution ◽  
High Performance ◽  
High Electrical Conductivity ◽  
3D Graphene ◽  
Transition Metal Nitride ◽  
Iron Incorporation ◽  
3D Network

Developing high-performance nonprecious electrocatalysts for oxygen evolution reaction (OER) is of great importance, but it remains a challenge. In this paper, we synthesize a porous monolithic catalytic electrode, which is transition metal nitride, Ni3FeN, constructed on a 3D network-like support of the strutted graphene foam (Ni3FeN/SG). The obtained Ni3FeN/SG electrode shows the excellent catalytic activity and the durability for OER in alkaline solution, owing to iron incorporation, high electrical conductivity and 3D network-like structure of strutted graphene. It requires small overpotential (226 mV) to actuate 10 mA cm−2, superior to most recently developed catalysts and commercial RuO2. The fabrication strategy provides a substantial way to expand 3D porous monolithic electrodes for various electrocatalytic applications.

Two-dimensional FeS2-encapsulated Au: a quasi-epitaxial heterojunction for synergistic catalytic activity under photoelectrocatalytic water reduction

2019 ◽  
Vol 7 (33) ◽  
pp. 19258-19268 ◽  
Author(s):  
Indranil Mondal ◽  
Song Yi Moon ◽  
Hyunhwa Lee ◽  
Heeyoung Kim ◽  
Jeong Young Park
Keyword(s):  
Electron Transfer ◽  
Catalytic Activity ◽  
Structural Organization ◽  
Two Dimensional ◽  
Hot Electron ◽  
Water Reduction ◽  
Hot Electron Transfer

Optimization of structural organization between metal and semiconductor electrocatalyst reveals the hot role of quasi-epitaxial heterojunction in hot electron transfer for synergistic photocatalysis.

Catalytic Activity of Rh Nanoparticles with High-index Faces for Hydrogen Evolution Reaction in Alkaline Solution

2020 ◽  
Vol 49 (2) ◽  
pp. 207-209
Author(s):  
Takuo Wakisaka ◽  
Kohei Kusada ◽  
Dongshuang Wu ◽  
Tomokazu Yamamoto ◽  
Takaaki Toriyama ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
High Index

scholarly journals Electrodeposition and characterization of Ni-MoO2 composite coatings as cathodes for the hydrogen evolution reaction in alkaline solution

2013 ◽  
Vol 78 (4) ◽  
pp. 549-554 ◽  
Author(s):  
Uros Lacnjevac
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Theoretical Interpretation ◽  
X Ray ◽  
Polarization Measurements ◽  
Naoh Solution

Composite Ni-MoO2 coatings were prepared and characterized with respect to their possible application as electrocatalysts for the hydrogen evolution reaction (HER) in alkaline solution. The composites were electrodeposited onto Ni meshes from an ammonium chloride Ni solution with suspended MoO2 particles in simulated industrial conditions for production of commercial cathodes. The influence of the concentration of MoO2 particles in the solution and deposition current density on the morphology, chemical and phase composition of obtained coatings was investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Catalytic activity for the HER of the coatings was examined by polarization measurements in a 32 wt. % NaOH solution at 90?C and compared to the activity of the commercial De Nora?s cathode (DN). It was shown that the most active Ni-MoO2 coating exhibits better polarization characteristics for the HER than the DN cathode. The mechanism of the HER on the specified Ni-MoO2 coating was investigated in 8 mol dm-3 NaOH at 30?C by means of steady-state polarization measurements and an electrochemical impedance spectroscopy (EIS) method. Based on the theoretical interpretation of the experimental data, rate constants of the three individual steps of the HER were determined and the source of catalytic activity of the coating was elucidated.

scholarly journals Bifunctional catalytic activity of Zn1−xFexO toward the OER/ORR: seeking an optimal stoichiometry

2020 ◽  
Vol 22 (38) ◽  
pp. 22078-22095
Author(s):  
Vladimir Rajić ◽  
Ivana Stojković Simatović ◽  
Ljiljana Veselinović ◽  
Jelena Belošević Čavor ◽  
Mirjana Novaković ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Catalytic Activity ◽  
Alkaline Solution ◽  
Microwave Processing

Eco-friendly and rapid microwave processing of a precipitate was used to produce Fe-doped zinc oxide (Zn1−xFexO, x = 0, 0.05, 0.1, 0.15 and 0.20) nanoparticles, which were tested as catalysts toward the ORR and OER in a moderately alkaline solution.

Excellent Fenton-like catalyst application in alkaline solution

2019 ◽  
Vol 13 (02) ◽  
pp. 2050002 ◽  
Author(s):  
Fan Xia ◽  
Zhaodong Nan
Keyword(s):  
Catalytic Activity ◽  
Alkaline Solution ◽  
Catalytic Mechanism ◽  
Experimental Result ◽  
Environmental Restoration ◽  
Fenton Process ◽  
Fenton Catalyst ◽  
Effects Of Ph ◽  
Catalyst Dosage

Fenton process has been widely applied for environmental restoration. However, acidic and neutral solutions are always needed in order to obtain an excellent catalytic activity. Flower-like MoS2 was firstly used as a Fenton catalyst with higher activity in alkaline solution than that in acidic and neutral ones. The catalytic mechanism indicated that [Formula: see text] and [Formula: see text] radicals formation induced the excellent catalytic activity in alkaline solution. Effects of pH, catalyst dosage, H2O2 and RhB concentrations on catalytic activity were studied, and the quantitative relations were established. The experimental result demonstrated that the catalyst was stable in alkaline solution. The leaching Mo was smaller than 2[Formula: see text]mg/L.

Bipolar Energetics and Bifunctional Catalytic Activity of a Nanocrystalline Ru Thin-Film Enable High-Performance Photoelectrochemical Water Reduction and Oxidation

2020 ◽  
Vol 12 (14) ◽  
pp. 16402-16410
Author(s):  
Jin-Young Jung ◽  
Dae Woong Kim ◽  
Sambhaji S. Shinde ◽  
Sung-Hae Kim ◽  
Dong-Hyung Kim ◽  
...  
Keyword(s):  
Thin Film ◽  
Catalytic Activity ◽  
High Performance ◽  
Water Reduction ◽  
Reduction And Oxidation

Cobalt phosphide-based electrocatalysts: synthesis and phase catalytic activity comparison for hydrogen evolution

2016 ◽  
Vol 4 (13) ◽  
pp. 4745-4754 ◽  
Author(s):  
Yuan Pan ◽  
Yan Lin ◽  
Yinjuan Chen ◽  
Yunqi Liu ◽  
Chenguang Liu
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Crystalline Phase ◽  
Catalytic Efficiency ◽  
Cobalt Phosphide ◽  
Carbon Species ◽  
Activity Comparison

The HER catalytic efficiency of cobalt phosphide-based catalysts can be enhanced significantly by adjusting crystalline phase and carbon species structures.

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