scholarly journals In Situ S/TEM Reduction Reaction of Ni-Mo2C Catalyst for Biomass Conversion

2018 ◽  
Vol 24 (S1) ◽  
pp. 322-323 ◽  
Author(s):  
Kinga A. Unocic ◽  
Jae-Soon Choi ◽  
Daniel A. Ruddy ◽  
Ce Yang ◽  
Jeremy Kropf ◽  
...  
Keyword(s):  
Biomass Conversion ◽  
Reduction Reaction ◽  
Mo2c Catalyst

In-situ stabilization of silver nanoparticles in polymer hydrogels for enhanced catalytic reduction of macro and micro pollutants

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Luqman Ali Shah ◽  
Rida Javed ◽  
Mohammad Siddiq ◽  
Iram BiBi ◽  
Ishrat Jamil ◽  
...  
Keyword(s):  
Catalytic Reduction ◽  
Thermo Gravimetric Analysis ◽  
Activation Parameters ◽  
Reduction Reaction ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
In Situ Stabilization ◽  
Hybrid Hydrogels ◽  
Kinetics Of

AbstractThe in-situ stabilization of Ag nanoparticles is carried out by the use of reducing agent and synthesized three different types of hydrogen (anionic, cationic, and neutral) template. The morphology, constitution and thermal stability of the synthesized pure and Ag-entrapped hybrid hydrogels were efficiently confirmed using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and thermo gravimetric analysis (TGA). The prepared hybrid hydrogels were used in the decolorization of methylene blue (MB) and azo dyes congo red (CR), methyl Orange (MO), and reduction of 4-nitrophenol (4-NP) and nitrobenzene (NB) by an electron donor NaBH4. The kinetics of the reduction reaction was also assessed to determine the activation parameters. The hybrid hydrogen catalysts were recovered by filtration and used continuously up to six times with 98% conversion of pollutants without substantial loss in catalytic activity. It was observed that these types of hydrogel systems can be used for the conversion of pollutants from waste water into useful products.

scholarly journals Electrokinetic and in situ spectroscopic investigations of CO electrochemical reduction on copper

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jing Li ◽  
Xiaoxia Chang ◽  
Haochen Zhang ◽  
Arnav S. Malkani ◽  
Mu-jeng Cheng ◽  
...  
Keyword(s):  
Mass Transport ◽  
Active Sites ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Adsorbed Hydrogen ◽  
Diffusion Type ◽  
Proton Coupled Electron Transfer ◽  
Alkaline Electrolytes ◽  
Reaction Orders

AbstractRigorous electrokinetic results are key to understanding the reaction mechanisms in the electrochemical CO reduction reaction (CORR), however, most reported results are compromised by the CO mass transport limitation. In this work, we determined mass transport-free CORR kinetics by employing a gas-diffusion type electrode and identified dependence of catalyst surface speciation on the electrolyte pH using in-situ surface enhanced vibrational spectroscopies. Based on the measured Tafel slopes and reaction orders, we demonstrate that the formation rates of C2+ products are most likely limited by the dimerization of CO adsorbate. CH4 production is limited by the CO hydrogenation step via a proton coupled electron transfer and a chemical hydrogenation step of CO by adsorbed hydrogen atom in weakly (7 < pH < 11) and strongly (pH > 11) alkaline electrolytes, respectively. Further, CH4 and C2+ products are likely formed on distinct types of active sites.

In-situ growth of Cu2O with honeycomb structure on roughed graphite paper for efficient electroreduction of CO2 to C2H4

2021 ◽  
Author(s):  
Zuoyu Yan ◽  
Xiuxiu Wang ◽  
Yang Tan ◽  
Aihua Liu ◽  
Fenqiang Luo ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Cuprous Oxide ◽  
Carbon Dioxide Reduction ◽  
Honeycomb Structure ◽  
Reduction Reaction ◽  
In Situ Growth

Metals and their alloys based electrocatalysts continue to attract great attention for electrochemical carbon dioxide reduction reaction (CO2RR). Herein, cuprous oxide (Cu2O) supported on N-doped flexible roughed graphite paper (NGP)...

scholarly journals In situ synthesis of metal embedded nitrogen doped carbon nanotubes as an electrocatalyst for the oxygen reduction reaction with high activity and stability

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 25051-25056 ◽  
Author(s):  
Yanhong Yin ◽  
Hengbo Zhang ◽  
Rongzhen Gao ◽  
Aili Wang ◽  
Xinxin Mao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Activity ◽  
Reduction Reaction ◽  
In Situ Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

In this work, a Co–N doped carbon nanotube (CNT) catalyst was fabricated via a simple pyrolysis approach.

In situ preparation of Ca0.5Mn0.5O/C as a novel high-activity catalyst for the oxygen reduction reaction

2016 ◽  
Vol 4 (48) ◽  
pp. 19147-19153 ◽  
Author(s):  
Yu-Qi Lyu ◽  
Chi Chen ◽  
Yang Gao ◽  
Mattia Saccoccio ◽  
Francesco Ciucci
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Activity ◽  
Rock Salt ◽  
Reduction Reaction ◽  
In Situ Preparation ◽  
Enhanced Activity ◽  
Activity Catalyst

Ca-substituted rock-salt MnO/C (Ca0.5Mn0.5O/C) is prepared using an in situ approach and shows enhanced activity for the oxygen reduction reaction (ORR).

scholarly journals One-pot synthesis of hollow hydrangea Au nanoparticles as a dual catalyst with SERS activity for in situ monitoring of a reduction reaction

RSC Advances ◽  
2019 ◽  
Vol 9 (18) ◽  
pp. 10314-10319 ◽  
Author(s):  
Yazhou Qin ◽  
Yuxiang Lu ◽  
Wufan Pan ◽  
Dongdong Yu ◽  
Jianguang Zhou
Keyword(s):  
Au Nanoparticles ◽  
Reduction Reaction ◽  
In Situ Monitoring ◽  
One Pot ◽  
Reduction Reactions ◽  
One Pot Synthesis

We prepared hollow flower-shaped Au nanoparticles as a bifunctional material by a one-pot method for in situ monitoring of reduction reactions.

scholarly journals N–doped hierarchical porous carbon nanoscrolls towards efficient oxygen reduction reaction in Zn–air batteries via interior and exterior modification

2021 ◽  
Author(s):  
Binhong He ◽  
Yangyang Chen ◽  
Da Hu ◽  
Ziyan Wen ◽  
Minjie Zhou ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Rational Design ◽  
Clean Energy ◽  
Reduction Reaction ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous ◽  
Carbon Nanoscrolls ◽  
Energy Conversion Devices

Rational design of oxygen reduction reaction (ORR) electrocatalysts is essential for promoting the development of clean energy conversion devices. Herein, we report an in–situ sacrificial template strategy combining with external...

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