scholarly journals Photoreforming of Glucose over CuO/TiO2

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 477 ◽  
Author(s):  
Elnaz Bahadori ◽  
Gianguido Ramis ◽  
Danny Zanardo ◽  
Federica Menegazzo ◽  
Michela Signoretto ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Economic Analysis ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Lower Surface ◽  
Flame Synthesis ◽  
Biomass Hydrolysis ◽  
Model Molecule

Hydrogen production has been investigated through the photoreforming of glucose, as model molecule representative for biomass hydrolysis. Different copper- or nickel-loaded titania photocatalysts have been compared. The samples were prepared starting from three titania samples, prepared by precipitation and characterized by pure Anatase with high surface area, or prepared through flame synthesis, i.e., flame pyrolysis and the commercial P25, leading to mixed Rutile and Anatase phases with lower surface area. The metal was added in different loading up to 1 wt % following three procedures that induced different dispersion and reducibility to the catalyst. The highest activity among the bare semiconductors was exhibited by the commercial P25 titania, while the addition of 1 wt % CuO through precipitation with complexes led to the best hydrogen productivity, i.e., 9.7 mol H2/h kgcat. Finally, a basic economic analysis considering only the costs of the catalyst and testing was performed, suggesting CuO promoted samples as promising and almost feasible for this application.

Ni supported high surface area CeO2–ZrO2 catalysts for hydrogen production from ethanol steam reforming

RSC Advances ◽  
2012 ◽  
Vol 2 (21) ◽  
pp. 8145 ◽  
Author(s):  
Mohamed A. Ebiad ◽  
Dalia R. Abd El-Hafiz ◽  
Radwa A. Elsalamony ◽  
Lamia. S. Mohamed
Keyword(s):  
Hydrogen Production ◽  
Surface Area ◽  
Steam Reforming ◽  
High Surface ◽  
High Surface Area ◽  
Ethanol Steam Reforming ◽  
Ethanol Steam

Development of high surface area bulk W2N catalysts for hydrogen production from ammonia decomposition

2020 ◽  
Vol 45 (32) ◽  
pp. 16219-16226
Author(s):  
Seetharamulu Podila ◽  
Hafedh Driss ◽  
Sharif F. Zaman ◽  
Abdulrahim A. Al-Zahrani ◽  
Muhammad A. Daous ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Ammonia Decomposition

Visible-light-induced hydrogen production over Pt-Eosin Y catalysts with high surface area silica gel as matrix

2007 ◽  
Vol 166 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Xiaojie Zhang ◽  
Zhiliang Jin ◽  
Yuexiang Li ◽  
Shuben Li ◽  
Gongxuan Lu
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Surface Area ◽  
Silica Gel ◽  
High Surface ◽  
High Surface Area ◽  
Eosin Y

Ni–Cu nano-crystalline alloys for efficient electrochemical hydrogen production in acid water

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 51111-51119 ◽  
Author(s):  
H. Nady ◽  
M. Negem
Keyword(s):  
Hydrogen Production ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Acid Water ◽  
Nano Crystalline

The Ni–49%Cu nano-crystallins alloy showed higher HER activity than electrodeposited Ni because their nano-sized roughness results in a high surface area.

scholarly journals Synthesis of NiAl2O4 with high surface area as precursor of Ni nanoparticles for hydrogen production

2010 ◽  
Vol 35 (21) ◽  
pp. 11725-11732 ◽  
Author(s):  
Nielson F.P. Ribeiro ◽  
Raimundo C.R. Neto ◽  
Silvia F. Moya ◽  
Mariana M.V.M. Souza ◽  
Martin Schmal
Keyword(s):  
Hydrogen Production ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Ni Nanoparticles

Atomically Ordered Rh2P Catalysts Anchored within Hollow Mesoporous Carbon for Efficient Hydrogen Production

2021 ◽  
Author(s):  
Xuwen Guo ◽  
Xin Chen ◽  
Yanping Huang ◽  
Xiaowen Min ◽  
Chuncai Kong ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Mesoporous Carbon ◽  
Room Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Catalytically Active

Atomically ordered Rh2P nanocluster encapsulated within a high-surface-area hollow mesoporous carbon nanoreactor (Rh2P@HMC) is catalytically active for hydrogen production via electrocatalytic hydrogen evolution reaction (HER) and room-temperature dehydrogenation of ammonia...

Preparation and photocatalytic activity of Au/TiO2 lyogels for hydrogen production

2018 ◽  
Vol 2 (10) ◽  
pp. 2284-2295 ◽  
Author(s):  
Lester Martínez ◽  
Mónica Benito ◽  
Ignasi Mata ◽  
Lluís Soler ◽  
Elies Molins ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Ball Milling ◽  
Surface Area ◽  
Au Nanoparticles ◽  
High Surface ◽  
High Surface Area ◽  
Contact Points ◽  
Metal Support

High surface area titania lyogels have been prepared, thermally transformed into TiO2 polymorphs at 400–850 °C, and decorated by ball milling with preformed Au nanoparticles of ca. 2 nm to ensure the same contact points at the metal–support interphase.

scholarly journals The Comparative Study of Pure Mesoporous Silica SBA-15 and CPTMS-SBA-15 Adsorption of Pb Heavy Metal

2018 ◽  
Vol 65 ◽  
pp. 05016 ◽  
Author(s):  
Jaka Fajar Fatriansyah ◽  
Donanta Dhaneswara ◽  
Frans Wensten Situmorang ◽  
Aloysius Brahmarsi ◽  
Farhan Delayori ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Surface Area ◽  
Industrial Wastewater ◽  
High Surface ◽  
High Surface Area ◽  
Lower Surface ◽  
High Concentration ◽  
Lead Adsorption ◽  
The Comparative Study ◽  
Very High

Mesoporous silica SBA-15 has been successfully synthesized and its surface has been modified/functionalized with CPTMS. The making of pure SBA-15 was operated at an optimized concentration of Pluronic 123 surfactant at 60 mM which yields surface area of 831.996 m2/g determined by BET. The modified SBA-15, SBA-15+CPTMS have a lower surface area in comparison with neat SBA-15. In this study, SBA-15+CPTMS have a surface area of about 711.061 m2/g. This very high surface area was utilized to remove the Pb in industrial wastewater using laboratory made water samples. Despite lower surface area and pore diameter of SBA-15+CPTMS in comparison with pure SBA-15, the effectivity of SBA-15+CPTMS in lead adsorption much higher than mesoporous silica SBA-15 especially at a lower concentration of adsorbents. In this paper, we compared the percentage of Pb removal using mesoporous silica SBA-15 and CPTMS-SBA-15 systems. It was found at a low concentration of adsorbent, CPTMS-SBA-15 yields three times percentage of Pb removal than pure SBA-15. However, at high concentration of adsorbent, CPTMS-SBA-15 percentage of Pb removal is just slightly higher than the pure SBA-15 percentage of Pb removal.

Gas Phase Synthesis of Molybdenum and/or Iron Nitrides, Carbides and Sulfides

1994 ◽  
Vol 368 ◽  
Author(s):  
Michael R. Close ◽  
Jeffrey L. Petersen
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Lower Surface ◽  
Iron Nitrides ◽  
Ammonia Vapor ◽  
Surface Areas ◽  
Molybdenum Sulfides ◽  
Molybdenum Carbides ◽  
Increasing Temperature

ABSTRACTThe thermolytic decomposition of Mo(CO)6 with hydrogen sulfide or ammonia vapor (in a He carrier stream) at temperatures ranging from 300 to 1100 °C produces high surface area molybdenum sulfides (MoS2 or Mo2S3) or molybdenum carbides (hexagonal Mo2C) and carbonitrides, (hexagonal MoN(C) or cubic Mo2N(C)), respectively. The MoS2 surface areas range from 16.7 to 82.0 m2/g, while the surface areas of molybdenum carbides and carbonitrides vary from 14.9 to 21.1 m2/g. The maximum surface area for MoS2 is achieved at 500 °C and decreases with increasing or decreasing temperature. The surface area of the carbonitrides formed from 300 to 800 °C increases with increasing temperature up to 950 °C, where lower surface area Mo2C is formed. Crystallographically pure hexagonal MoN is prepared by decomposing Mo(CO) 6 in pure ammonia. Fe(CO) 5 decompositions in ammonia produce FexZ (where 5.8≥x≥1.6 and Z=C and N), and in some cases elemental Fe. Hexagonal Fe3 N(C) forms when Fe(CO) 5 is thermolyzed in ammonia from 300 to 600 °C, with surface areas ranging from 9.5 to 13.7 m2/g, whereas orthorhombic Fe3C and cubic Fe are produced at 700, 800, 900 and 1000 °C with surface areas of 6.7, 7.6, 2.2 and 2.0 m2/g, respectively. Within the same phase, the surface areas of the carbonitrides increase with increasing reaction temperature. These iron and molybdenum carbonitrides catalyze the conversion of CO/H2 to alkanes and methanol. Based on preliminary catalytic studies, the highest rate of methane (2850 g/kg/hr at 374 °C) and methanol (440 g/kg/hr at 284 °C) formation was accomplished with an FeMo carbonitride prepared by decomposing Mo(CO)6 and Fe(CO)5 in ammonia at 800 °C.

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