scholarly journals Zeolites: Promised Materials for the Sustainable Production of Hydrogen

2013 ◽  
Vol 2013 ◽  
pp. 1-19 ◽  
Author(s):  
Antonio Chica
Keyword(s):  
Water Splitting ◽  
Environmental Sustainability ◽  
High Surface ◽  
High Surface Area ◽  
Clean Energy ◽  
Sustainable Production ◽  
Pore Channel ◽  
Highly Active ◽  
Reforming Catalysts ◽  
Production Of Hydrogen

Zeolites have been shown to be useful catalysts in a large variety of reactions, from acid to base and redox catalysis. The particular properties of these materials (high surface area, uniform porosity, interconnected pore/channel system, accessible pore volume, high adsorption capacity, ion-exchange ability, and shape/size selectivity) provide crucial features as effective catalysts and catalysts supports. Currently, new applications are being developed from the considerable existing knowledge about these important and remarkable materials. Among them, those applications related to the development of processes with less impact on the environment (green processes) and with the production of alternative and cleaner energies are of paramount importance. Hydrogen is believed to be critical for the energy and environmental sustainability. It is a clean energy carrier which can be used for transportation and stationary power generation. In the production of hydrogen, the development of new catalysts is one of the most important and effective ways to address the problems related to the sustainable production of hydrogen. This paper explores the possibility to use zeolites as catalysts or supports of catalysts to produce hydrogen from renewable resources. Specifically, two approaches have been considered: reforming of biomass-derived compounds (reforming of bioethanol) and water splitting using solar energy. This paper examines the role of zeolites in the preparation of highly active and selective ethanol steam reforming catalysts and their main properties to be used as efficient water splitting photocatalysts.

scholarly journals Photocatalytic Activity of Silver-Based Biomimetics Composites

Biomimetics ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 4
Author(s):  
Abniel Machín ◽  
Loraine Soto-Vázquez ◽  
Carla Colón-Cruz ◽  
Carlos A. Valentín-Cruz ◽  
Gerardo J. Claudio-Serrano ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Photocatalytic Activity ◽  
Catalytic Activity ◽  
Hydrogen Production ◽  
Water Splitting ◽  
High Surface ◽  
High Surface Area ◽  
Production Of Hydrogen ◽  
Dramatic Difference ◽  
Pristine Tio2

Different Ag@TiO2 and Ag@ZnO catalysts, with nanowire (NW) structure, were synthesized containing different amounts of silver loading (1, 3, 5, and 10 wt.%) and characterized by FE-SEM, HRTEM, BET, XRD, Raman, XPS, and UV–vis. The photocatalytic activity of the composites was studied by the production of hydrogen via water splitting under UV–vis light and the degradation of the antibiotic ciprofloxacin. The maximum hydrogen production of all the silver-based catalysts was obtained with a silver loading of 10 wt.% under irradiation at 500 nm. Moreover, 10%Ag@TiO2 NWs was the catalyst with the highest activity in the hydrogen production reaction (1119 µmol/hg), being 18 times greater than the amount obtained with the pristine TiO2 NW catalyst. The most dramatic difference in hydrogen production was obtained with 10%Ag@TiO2-P25, 635 µmol/hg, being 36 times greater than the amount reported for the unmodified TiO2-P25 (18 µmol/hg). The enhancement of the catalytic activity is attributed to a synergism between the silver nanoparticles incorporated and the high surface area of the composites. In the case of the degradation of ciprofloxacin, all the silver-based catalysts degraded more than 70% of the antibiotic in 60 min. The catalyst that exhibited the best result was 3%Ag@ZnO commercial, with 99.72% of degradation. The control experiments and stability tests showed that photocatalysis was the route of degradation and the selected silver-based catalysts were stable after seven cycles, with less than 1% loss of efficiency per cycle. These results suggest that the catalysts could be employed in additional cycles without the need to be resynthesized, thus reducing remediation costs.

Amorphous Ni–Fe–Se hollow nanospheres electrodeposited on nickel foam as a highly active and bifunctional catalyst for alkaline water splitting

2020 ◽  
Vol 49 (20) ◽  
pp. 6764-6775 ◽  
Author(s):  
Xuerui Yi ◽  
Xiaobo He ◽  
Fengxiang Yin ◽  
Biaohua Chen ◽  
Guoru Li ◽  
...  
Keyword(s):  
Water Splitting ◽  
Nickel Foam ◽  
Bifunctional Catalyst ◽  
Sustainable Production ◽  
Hollow Nanospheres ◽  
Alkaline Water ◽  
Highly Efficient ◽  
Highly Active ◽  
Production Of Hydrogen

The electrodeposition of amorphous Ni–Fe–Se hollow nanospheres as a highly efficient bifunctional catalyst for the sustainable production of hydrogen.

High Surface Area NiCoP Nanostructure as Efficient Water Splitting Electrocatalyst for the Oxygen Evolution Reaction

2021 ◽  
pp. 111312
Author(s):  
Sisir Maity ◽  
Dheeraj Kumar Singh ◽  
Divya Bhutani ◽  
Suchitra Prasad ◽  
Umesh V. Waghmare ◽  
...  
Keyword(s):  
Surface Area ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Surface ◽  
High Surface Area

Highly active mixed-valent MnOxspheres constructed by nanocrystals as efficient catalysts for long-cycle Li–O2batteries

2016 ◽  
Vol 4 (43) ◽  
pp. 17129-17137 ◽  
Author(s):  
Sanpei Zhang ◽  
Zhaoyin Wen ◽  
Yang Lu ◽  
Xiangwei Wu ◽  
Jianhua Yang
Keyword(s):  
Surface Area ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Long Cycle ◽  
Highly Active

We demonstrate a low-cost and facile strategy to synthesize mixed-valent MnOxspheres constructed from nanocrystals (~5 nm), containing MnII, MnIII, and MnIVspecies. Such highly active mixed-valent MnOxspheres with high surface area greatly improve the performance of Li–O2batteries.

scholarly journals Ultrasonic-assisted preparation of highly active Co3O4/MCM-41 adsorbent and its desulfurization performance for low H2S concentration gas

RSC Advances ◽  
2020 ◽  
Vol 10 (50) ◽  
pp. 30214-30222
Author(s):  
Bolong Jiang ◽  
Jiaojing Zhang ◽  
Yanguang Chen ◽  
Hua Song ◽  
Tianzhen Hao ◽  
...  
Keyword(s):  
Surface Area ◽  
Active Sites ◽  
High Surface ◽  
High Surface Area ◽  
Highly Active ◽  
Ultrasonic Assisted ◽  
Sulfur Capacity ◽  
Mcm 41

Co3O4/MCM-41 adsorbent with high surface area and more active sites was successfully prepared by ultrasonic assisted impregnation (UAI) technology and it has been found that the sulfur capacity was improved by 33.2% because of ultrasonication.

scholarly journals Heteroepitaxy of GaP on silicon for efficient and cost-effective photoelectrochemical water splitting

2019 ◽  
Vol 7 (14) ◽  
pp. 8550-8558 ◽  
Author(s):  
Mahdi Alqahtani ◽  
Sanjayan Sathasivam ◽  
Fan Cui ◽  
Ludmilla Steier ◽  
Xueming Xia ◽  
...  
Keyword(s):  
Water Splitting ◽  
Cost Effective ◽  
Clean Energy ◽  
Energy Generation ◽  
Photoelectrochemical Water Splitting ◽  
Production Of Hydrogen

Photoelectrochemical production of hydrogen by using sunlight to split water offers a sustainable approach for clean energy generation.

Nickel phosphide decorated with trace amount of platinum as an efficient electrocatalyst for the alkaline hydrogen evolution reaction

2019 ◽  
Vol 3 (8) ◽  
pp. 2006-2014 ◽  
Author(s):  
Jiawei Xia ◽  
Kapil Dhaka ◽  
Michael Volokh ◽  
Guiming Peng ◽  
Zhen Wu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Trace Amount ◽  
Sustainable Production ◽  
Nickel Phosphide ◽  
Promising Technology ◽  
Production Of Hydrogen

Electrocatalytic water-splitting is considered as a highly promising technology for the sustainable production of hydrogen.

scholarly journals Photoelectrochemical Water Splitting Reaction System Based on Metal-Organic Halide Perovskites

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 210 ◽  
Author(s):  
Dohun Kim ◽  
Dong-Kyu Lee ◽  
Seong Min Kim ◽  
Woosung Park ◽  
Uk Sim
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Fossil Fuels ◽  
Reaction System ◽  
Hydrogen Gas ◽  
Production Environment ◽  
Organic Halide ◽  
Highly Active ◽  
Production Of Hydrogen ◽  
Metal Organic

In the development of hydrogen-based technology, a key challenge is the sustainable production of hydrogen in terms of energy consumption and environmental aspects. However, existing methods mainly rely on fossil fuels due to their cost efficiency, and as such, it is difficult to be completely independent of carbon-based technology. Electrochemical hydrogen production is essential, since it has shown the successful generation of hydrogen gas of high purity. Similarly, the photoelectrochemical (PEC) method is also appealing, as this method exhibits highly active and stable water splitting with the help of solar energy. In this article, we review recent developments in PEC water splitting, particularly those using metal-organic halide perovskite materials. We discuss the exceptional optical and electrical characteristics which often dictate PEC performance. We further extend our discussion to the material limit of perovskite under a hydrogen production environment, i.e., that PEC reactions often degrade the contact between the electrode and the electrolyte. Finally, we introduce recent improvements in the stability of a perovskite-based PEC device.

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