Size Effect of Carbon-Supported Pd Nanoparticles in the Hydrogen Production from Formic Acid

2015 ◽  
Vol 88 (10) ◽  
pp. 1500-1502 ◽  
Author(s):  
Miriam Navlani-García ◽  
Kohsuke Mori ◽  
Meicheng Wen ◽  
Yasutaka Kuwahara ◽  
Hiromi Yamashita
Keyword(s):  
Hydrogen Production ◽  
Size Effect ◽  
Formic Acid ◽  
Pd Nanoparticles ◽  
Supported Pd

Investigation of Size Sensitivity in the Hydrogen Production from Formic Acid over Carbon-Supported Pd Nanoparticles

2016 ◽  
Vol 1 (9) ◽  
pp. 1879-1886 ◽  
Author(s):  
Miriam Navlani-García ◽  
Kohsuke Mori ◽  
Ai Nozaki ◽  
Yasutaka Kuwahara ◽  
Hiromi Yamashita
Keyword(s):  
Hydrogen Production ◽  
Formic Acid ◽  
Pd Nanoparticles ◽  
Supported Pd

scholarly journals Investigation of Pd nanoparticles supported on zeolites for hydrogen production from formic acid dehydrogenation

2015 ◽  
Vol 5 (1) ◽  
pp. 364-371 ◽  
Author(s):  
M. Navlani-García ◽  
M. Martis ◽  
D. Lozano-Castelló ◽  
D. Cazorla-Amorós ◽  
K. Mori ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Formic Acid ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Beta Zeolites ◽  
Formic Acid Dehydrogenation

Palladium nanoparticles supported on different BETA zeolites are promising catalysts for H2production from formic acid dehydrogenation.

scholarly journals Boosting Hydrogen Production from Formic Acid over Pd Catalysts by Deposition of N-Containing Precursors on the Carbon Support

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3885 ◽  
Author(s):  
Golub ◽  
Beloshapkin ◽  
Gusel’nikov ◽  
Bolotov ◽  
Parmon ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Formic Acid ◽  
Carbon Support ◽  
Pd Nanoparticles ◽  
High Dispersion ◽  
Pd Catalysts ◽  
Strong Electron ◽  
High Hydrogen ◽  
Hydrogen Carrier ◽  
Pyridinic Nitrogen

Formic acid is a promising liquid organic hydrogen carrier (LOHC) since it has relatively high hydrogen content (4.4 wt%), low inflammability, low toxicity and can be obtained from biomass or from CO2. The aim of the present research was the creation of efficient 1 wt% Pd catalysts supported on mesoporous graphitic carbon (Sibunit) for the hydrogen production from gas-phase formic acid. For this purpose, the carbon support was modified by pyrolysis of deposited precursors containing pyridinic nitrogen such as melamine (Mel), 2,2′-bipyridine (Bpy) or 1,10-phenanthroline (Phen) at 673 K. The following activity trend of the catalysts Pd/Mel/C > Pd/C ~ Pd/Bpy/C > Pd/Phen/C was obtained. The activity of the Pd/Mel/C catalyst was by a factor of 4 higher than the activity of the Pd/C catalyst at about 373 K and the apparent activation energy was significantly lower than those for the other catalysts (32 vs. 42–46 kJ/mol). The high activity of the melamine-based samples was explained by a high dispersion of Pd nanoparticles (~2 nm, HRTEM) and their strong electron-deficient character (XPS) provided by interaction of Pd with pyridinic nitrogen species of the support. The presented results can be used for the development of supported Pd catalysts for hydrogen production from different liquid organic hydrogen carriers.

scholarly journals Carbon-Doping as Efficient Strategy for Improving Photocatalytic Activity of Polysilicon Supported Pd in Hydrogen Evolution from Formic Acid

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3919
Author(s):  
Amal Al-Azmi ◽  
Sajjad Keshipour
Keyword(s):  
Photocatalytic Activity ◽  
Citric Acid ◽  
Formic Acid ◽  
Cost Effective ◽  
Pd Nanoparticles ◽  
Carbon Doping ◽  
Turnover Frequency ◽  
New Approach ◽  
Carbon Doped ◽  
Supported Pd

Interest in cost-effective materials pushes researchers to the inexpensive and abundant semiconductors to use photons’ energy for generating electrons and holes required for photocatalytic transformations. At the same time, polysilicon is one of the economic semiconductors with a disadvantage of high bandgap which could be solved by carbon-doping. We employed this strategy to the synthesis of carbon-doped polysilicon by a new approach starting from citric acid and methyltrimethoxysilane. The nanocomposite obtained was utterly characterized, and compared with bare polysilicon; increased UV–Vis absorbance and shift to higher wavelengths were the most notable characteristics of the synthesized catalyst. The carbon-doped polysilicon was modified with Pd nanoparticles to obtain a new heterogeneous photocatalyst for the formic acid degradation. The decomposition of formic acid was photocatalyzed by the obtained nanocomposite with a hydrogen production turnover frequency of up to 690 h−1. Moreover, it was demonstrated that the catalyst is stable and recyclable.

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