Surface modulation of inorganic layer via soft plasma electrolysis for optimizing chemical stability and catalytic activity

2020 ◽  
Vol 391 ◽  
pp. 123614 ◽  
Author(s):  
M.P. Kamil ◽  
W. Al Zoubi ◽  
D.K. Yoon ◽  
H.W. Yang ◽  
Y.G. Ko
Keyword(s):  
Catalytic Activity ◽  
Chemical Stability ◽  
Inorganic Layer ◽  
Plasma Electrolysis ◽  
Surface Modulation

scholarly journals Electrochemical Nitrogen Reduction to Ammonia by Mo2N: Catalysis or Decomposition?

2019 ◽  
Author(s):  
Bo Hu ◽  
maowei hu ◽  
Tianbiao Liu
Keyword(s):  
Catalytic Activity ◽  
Chemical Stability ◽  
Energy Efficient ◽  
Stability Problem ◽  
Reduction Reaction ◽  
Aqueous Electrolytes ◽  
Metal Nitrides ◽  
Research Practice ◽  
Nitrogen Reduction ◽  
Fast Chemical

<p>Electrocatalytic synthesis of ammonia from nitrogen (N<sub>2</sub>) representsa highly attractive approach to produce ammonia under more energy efficient and CO<sub>2</sub>-free conditions in comparison the well-known Haber-Bosch process. electrocatalytic N2 fixation has been under intensive exploration over last few years and has become a hot topic in catalysis. A number of heterogeneous electrocatalysts have been reported with various claimed performance for NRR recently. However, the research practice in this emerging field has been problematic as demonstrated in the submitted work.</p>Metal nitrides have been studied both theoretically and experimentally indicating their potential capability of electrocatalytic N<sub>2</sub>reduction. However, the nitrogen contained nature and chemical stability problem of the nitride materials could bring in ambiguous results. In the submitted manuscript, it is revealed that Mo<sub>2</sub>N could undergo fast chemical decomposition in aqueous electrolytes to generate ammonium (NH<sub>4</sub><sup>+</sup>) and showed no catalytic activity for NRR. <i><u>The present results call urgent attention to carefully evaluate the catalytic nature of nitrogen reduction reaction (NRR) by nitrogen containing materials.</u></i>In addition, we also highlight apparent pitfalls to avoid in determining catalytic NNR.

scholarly journals Synthesis of ammonia directly from wet nitrogen using a redox stable La0.75Sr0.25Cr0.5Fe0.5O3−δ–Ce0.8Gd0.18Ca0.02O2−δ composite cathode

RSC Advances ◽  
2015 ◽  
Vol 5 (49) ◽  
pp. 38977-38983 ◽  
Author(s):  
Ibrahim A. Amar ◽  
Rong Lan ◽  
Shanwen Tao
Keyword(s):  
Catalytic Activity ◽  
Chemical Stability ◽  
Ammonia Synthesis ◽  
Composite Cathode

Introduction of Cr3+ ions at the B-site of doped LaFeO3 improves both the chemical stability and catalytic activity for ammonia synthesis.

scholarly journals Electrochemical Nitrogen Reduction to Ammonia by Mo2N: Catalysis or Decomposition?

2019 ◽  
Author(s):  
Bo Hu ◽  
maowei hu ◽  
Lance Seefeldt ◽  
Tianbiao Liu
Keyword(s):  
Catalytic Activity ◽  
Chemical Stability ◽  
Energy Efficient ◽  
Stability Problem ◽  
Reduction Reaction ◽  
Aqueous Electrolytes ◽  
Metal Nitrides ◽  
Research Practice ◽  
Nitrogen Reduction ◽  
Fast Chemical

<p>Electrocatalytic synthesis of ammonia from nitrogen (N<sub>2</sub>) representsa highly attractive approach to produce ammonia under more energy efficient and CO<sub>2</sub>-free conditions in comparison the well-known Haber-Bosch process. electrocatalytic N2 fixation has been under intensive exploration over last few years and has become a hot topic in catalysis. A number of heterogeneous electrocatalysts have been reported with various claimed performance for NRR recently. However, the research practice in this emerging field has been problematic as demonstrated in the submitted work.</p>Metal nitrides have been studied both theoretically and experimentally indicating their potential capability of electrocatalytic N<sub>2</sub>reduction. However, the nitrogen contained nature and chemical stability problem of the nitride materials could bring in ambiguous results. In the submitted manuscript, it is revealed that Mo<sub>2</sub>N could undergo fast chemical decomposition in aqueous electrolytes to generate ammonium (NH<sub>4</sub><sup>+</sup>) and showed no catalytic activity for NRR. <i><u>The present results call urgent attention to carefully evaluate the catalytic nature of nitrogen reduction reaction (NRR) by nitrogen containing materials.</u></i>In addition, we also highlight apparent pitfalls to avoid in determining catalytic NNR.

scholarly journals Decoration of an inorganic layer with nickel (hydr)oxide via green plasma electrolysis

RSC Advances ◽  
2018 ◽  
Vol 8 (47) ◽  
pp. 26804-26816 ◽  
Author(s):  
Siti Fatimah ◽  
Fitri Khoerunnisa ◽  
Young Gun Ko
Keyword(s):  
Infrared Emissivity ◽  
Inorganic Layer ◽  
Plasma Electrolysis ◽  
Solar Absorbance

Nickel (hydr)oxide decorating MgO matrix via green plasma electrolysis exhibited high solar absorbance but low infrared emissivity.

Synthesis and Electrocatalytic Performance of Ultrathin Noble Metal Nanosheets

CrystEngComm ◽  
2022 ◽  
Author(s):  
Dolong Zhu ◽  
haidong Zhao ◽  
Bin Wang ◽  
Shengchun Yang
Keyword(s):  
Catalytic Activity ◽  
Fuel Cells ◽  
Noble Metal ◽  
Chemical Stability ◽  
Biomedical Applications ◽  
High Catalytic Activity ◽  
Electrocatalytic Performance ◽  
Metal Nanomaterials

Noble metal nanomaterials are widely used in various fields such as catalysis, fuel cells, and biomedical applications due to their high catalytic activity, chemical stability, and biocompatibility. The performance of...

scholarly journals Copper (II) Ion-Modified Gold Nanoclusters as Peroxidase Mimetics for the Colorimetric Detection of Pyrophosphate

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5538
Author(s):  
Yunjing Shi ◽  
Jinjie Wang ◽  
Kun Mu ◽  
Suqin Liu ◽  
Guang Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Detection Limit ◽  
Chemical Stability ◽  
Human Urine ◽  
Detection Method ◽  
Colorimetric Detection ◽  
Gold Nanoclusters ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Optimized Conditions

Copper (II) ions have been shown to greatly improve the chemical stability and peroxidase-like activity of gold nanoclusters (AuNCs). Since the affinity between Cu2+ and pyrophosphate (PPi) is higher than that between Cu2+ and AuNCs, the catalytic activity of AuNCs-Cu2+ decreases with the introduction of PPi. Based on this principle, a new colorimetric detection method of PPi with high sensitivity and selectivity was developed by using AuNCs-Cu2+ as a probe. Under optimized conditions, the detection limit of PPi was 0.49 nM with a linear range of 0.51 to 30,000 nM. The sensitivity of the method was three orders of magnitude higher than that of a fluorescence method using AuNCs-Cu2+ as the probe. Finally, the AuNCs-Cu2+ system was successfully applied to directly determine the concentration of PPi in human urine samples.

scholarly journals Electrochemical Nitrogen Reduction to Ammonia by Mo2N: Catalysis or Decomposition?

2019 ◽  
Author(s):  
Bo Hu ◽  
maowei hu ◽  
Lance Seefeldt ◽  
Tianbiao Liu
Keyword(s):  
Catalytic Activity ◽  
Chemical Stability ◽  
Energy Efficient ◽  
Stability Problem ◽  
Reduction Reaction ◽  
Aqueous Electrolytes ◽  
Metal Nitrides ◽  
Research Practice ◽  
Nitrogen Reduction ◽  
Fast Chemical

<p>Electrocatalytic synthesis of ammonia from nitrogen (N<sub>2</sub>) representsa highly attractive approach to produce ammonia under more energy efficient and CO<sub>2</sub>-free conditions in comparison the well-known Haber-Bosch process. electrocatalytic N2 fixation has been under intensive exploration over last few years and has become a hot topic in catalysis. A number of heterogeneous electrocatalysts have been reported with various claimed performance for NRR recently. However, the research practice in this emerging field has been problematic as demonstrated in the submitted work.</p>Metal nitrides have been studied both theoretically and experimentally indicating their potential capability of electrocatalytic N<sub>2</sub>reduction. However, the nitrogen contained nature and chemical stability problem of the nitride materials could bring in ambiguous results. In the submitted manuscript, it is revealed that Mo<sub>2</sub>N could undergo fast chemical decomposition in aqueous electrolytes to generate ammonium (NH<sub>4</sub><sup>+</sup>) and showed no catalytic activity for NRR. <i><u>The present results call urgent attention to carefully evaluate the catalytic nature of nitrogen reduction reaction (NRR) by nitrogen containing materials.</u></i>In addition, we also highlight apparent pitfalls to avoid in determining catalytic NNR.

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