A microwave-induced solution-polymerization synthesis of doped LaGaO3 powders

Zhai, Yuling; Ye, Chang; Xiao, Jianzhong; Dai, Lei

doi:10.1016/j.jpowsour.2006.07.069

Cited by 27 publications

(19 citation statements)

References 23 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…22 However, this method has some disadvantages such as high temperature requirement and formation of secondary phases. [23][24][25] A variety of factors need to be analyzed when selecting the cell material such as system operating temperature, current density, pressure, and conductivity which affect the ammonia production rate. It is important to note that conductivity of a solid electrolyte increases exponentially with temperature and by reducing cell thickness as reported by Giddey et al 26 Kyriakou et al 27 recently reported extensive literature data about low temperature, medium temperature and high temperature electrochemical NH 3 28 presented the recent developments in electrochemical NH 3 production and they categorized the sources of proton as water, hydrogen and sacrificial proton donors.…”

mentioning

confidence: 99%

Electrochemical Synthesis of Ammonia in Molten Salt Electrolyte Using Hydrogen and Nitrogen at Ambient Pressure

Biçer

Dinçer

2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

In this study, the synthesis of ammonia (NH3) at ambient pressure using H2 and N2 is electrochemically achieved. The conducting and reaction media with molten salt consist of molten hydroxide as NaOH and KOH whereas the reaction temperature is varied in the range of 200°C to 255°C to investigate the impact of temperature on the ammonia production rate and hence performance. The porous nickel mesh electrodes having an area of 100 cm2 are used as cathode and anode where the supplied electricity is controlled using potentiostat/galvanostat. The maximum faradaic efficiency for ammonia synthesis is found to be 9.3% at 210°C corresponding to 6.53 × 10−10 mol/s cm2 ammonia evolution rate at 2 mA/cm2 current density with nano-Fe3O4 as the catalyst. Furthermore, the applied voltages and applied currents are varied to find the optimum experimental conditions for molten salt electrolyte based electrochemical ammonia synthesis.

show abstract

mentioning

confidence: 99%

Electrochemical Synthesis of Ammonia in Molten Salt Electrolyte Using Hydrogen and Nitrogen at Ambient Pressure

Biçer

Dinçer

2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…The temperatures of the calcination treatments were chosen based upon the thermograms measured by the simultaneous TG-DTA performed on dried gels under air flux (not reported here), in agreement with results reported by Zhai et al [9]. LS 0.20 GM 0.17 powders were obtained in both cases after calcination at 1,300°C for 6 h, as shown in Figure 2, where XRD diffractograms and the Rietveld fits are reported.…”

Section: Characterizationsmentioning

confidence: 66%

“…The preparation of nitrate solution and the addition of citric acid and EG were carried out as reported by Zhai et al [9]. Afterwards, the solution was stirred at 80°C for about 16 h. The main difference of the microwave-assisted process with respect to the classical SGP was the thermal treatment of the as-prepared clear solution.…”

Section: Powders Synthesismentioning

confidence: 99%

“…In fact, various intermediate phases, such as LaSrGaO 4 , LaSrGa 3 O 7 , La 4 Ga 2 O 9 , and MgO, are frequently formed [9][10][11][12][13]. However, the synthesis of LS 0.20 GM 0.17 seems to produce a material having less presence of secondary phases and higher conductivity [14].…”

Section: Introductionmentioning

confidence: 99%

“…As to LSGM, a microwave heating was introduced in the SGP synthesis, as reported by Zhai et al [9,24], showing the advantages in terms of phase purity but with no information on the process parameters influence on LSGM ionic conductivity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Microwave‐Assisted Pechini Method on La_0.80Sr_0.20Ga_0.83Mg_0.17O_3–δ Ionic Conductivity

Boldrini¹,

Mortalò²,

Fasolin³

et al. 2012

Fuel Cells

View full text Add to dashboard Cite

With the aim of investigating the microwave influence on the electrolyte material properties, La0.80Sr0.20Ga0.83Mg0.17O2.815 was prepared by both a conventional and a microwave‐assisted sol–gel Pechini method. With respect to the conventional Pechini method (hereafter SGP), the microwave assisted process (hereafter MWA‐SGP) guaranteed a faster procedure, reducing the time needed to remove the excess solvents to complete the polyesterification reaction from some days to a few hours. In fact, when a MWA‐SGP method was used, powders having higher phase purity were obtained. The sintering process at 1,450 °C of the powders prepared by both methods yielded pellets with similar density values (≥92% of theoretical). Nevertheless, only by microwave‐assisted process single‐phase products were obtained and no secondary phases such as tetragonal LaSrGaO4 and LaSrGa3O7 were detected. These by‐products have been demonstrated to be detrimental for conductivity. Indeed, pellets obtained by MWA‐SGP method showed oxygen ionic conductivity values higher (about 30–40%) than those checked for SGP samples, thus demonstrating the important role of the microwave process on reducing time and costs and on improving the electrolyte properties.

show abstract

Performance assessment of electrochemical ammonia synthesis using photoelectrochemically produced hydrogen

Biçer

Dinçer

2017

Int J Energy Res

View full text Add to dashboard Cite

Summary In this study, an effective hydrogen production for electrochemical ammonia synthesis is performed using a photoelectrochemical hydrogen production reactor. A photoelectrochemical cell is built by electrodepositing photosensitive Cu2O particles on a cathode stainless steel plate. The produced hydrogen is supplied to a molten salt electrolyte‐based electrochemical ammonia synthesis reactor at ambient pressure where nitrogen gas is co‐supplied from a nitrogen tank. Using photoelectrochemically produced hydrogen, the electrochemical synthesis of ammonia is successfully accomplished. The reactions of nitrogen and hydrogen gases occur in a molten salt ambient consisting of molten hydroxides (NaOH and KOH), whereas the reaction temperature is varied in the range of 180°C to 260°C to investigate the impact of temperature on the performance. The porous nickel‐meshed electrodes with an effective area of 25 cm2 are used as cathode and anode. The hydrogen production process is characterized under both concentrated light and non‐concentrated light conditions. The maximum Coulombic efficiency for ammonia synthesis is calculated to be 14.2% with an ammonia production rate of 4.41 × 10−9 mol/s cm2 via nano‐Fe3O4 catalyst. Copyright © 2017 John Wiley & Sons, Ltd.

show abstract

A microwave-induced solution-polymerization synthesis of doped LaGaO3 powders

Cited by 27 publications

References 23 publications

Electrochemical Synthesis of Ammonia in Molten Salt Electrolyte Using Hydrogen and Nitrogen at Ambient Pressure

Electrochemical Synthesis of Ammonia in Molten Salt Electrolyte Using Hydrogen and Nitrogen at Ambient Pressure

Influence of Microwave‐Assisted Pechini Method on La_0.80Sr_0.20Ga_0.83Mg_0.17O_3–δ Ionic Conductivity

Performance assessment of electrochemical ammonia synthesis using photoelectrochemically produced hydrogen

Contact Info

Product

Resources

About

A microwave-induced solution-polymerization synthesis of doped LaGaO3 powders

Cited by 27 publications

References 23 publications

Electrochemical Synthesis of Ammonia in Molten Salt Electrolyte Using Hydrogen and Nitrogen at Ambient Pressure

Electrochemical Synthesis of Ammonia in Molten Salt Electrolyte Using Hydrogen and Nitrogen at Ambient Pressure

Influence of Microwave‐Assisted Pechini Method on La0.80Sr0.20Ga0.83Mg0.17O3–δ Ionic Conductivity

Performance assessment of electrochemical ammonia synthesis using photoelectrochemically produced hydrogen

Contact Info

Product

Resources

About

Influence of Microwave‐Assisted Pechini Method on La_0.80Sr_0.20Ga_0.83Mg_0.17O_3–δ Ionic Conductivity