scholarly journals Synthesizing the High Surface Area g-C3N4 for Greatly Enhanced Hydrogen Production

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 832
Author(s):  
Chengfei Wang ◽  
Tongxin Han ◽  
Chang Xin ◽  
Hui Miao
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
Redox Reaction ◽  
Active Sites ◽  
High Surface ◽  
High Surface Area ◽  
Ambient Atmosphere ◽  
Diffusion Distance

Adjusting the structure of g-C3N4 to significantly enhance its photocatalytic activity has attracted considerable attention. Herein, a novel, sponge-like g-C3N4 with a porous structure is prepared from the annealing of protonated melamine under N2/H2 atmosphere (PH-CN). Compared to bulk g-C3N4 via calcination of melamine under ambient atmosphere (B-CN), PH-CN displays thinner nanosheets and a higher surface area (150.1 m2/g), which is a benefit for shortening the diffusion distance of photoinduced carriers, providing more active sites, and finally favoring the enhancement of the photocatalytic activity. Moreover, it can be clearly observed from the UV-vis spectrum that PH-CN displays better performance for harvesting light compared to B-CN. Additionally, the PH-CN is prepared with a larger band gap of 2.88 eV with the Fermi level and conduction band potential increased and valence band potential decreased, which could promote the water redox reaction. The application experiment results show that the hydrogen evolution rate on PH-CN was nearly 10 times higher than that of B-CN, which was roughly 4104 μmol h−1 g−1. The method shown in this work provides an effective approach to adjust the structure of g-C3N4 with considerable photocatalytic hydrogen evolution activity.

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 Rugae-like FeP nanocrystal assembly on a carbon cloth: an exceptionally efficient and stable cathode for hydrogen evolution

Nanoscale ◽  
2015 ◽  
Vol 7 (25) ◽  
pp. 10974-10981 ◽  
Author(s):  
Xiulin Yang ◽  
Ang-Yu Lu ◽  
Yihan Zhu ◽  
Shixiong Min ◽  
Mohamed Nejib Hedhili ◽  
...  
Keyword(s):  
Gas Phase ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Efficiency ◽  
Carbon Cloth ◽  
Nanocrystal Assembly

High surface area FeP nanosheets on a carbon cloth were prepared by gas phase phosphidation of electroplated FeOOH, which exhibit exceptionally high catalytic efficiency and stability for hydrogen generation.

Spidery catalyst for the synthesis of quinazoline-2,4(1H,3H)-diones

2016 ◽  
Vol 6 (5) ◽  
pp. 1435-1441 ◽  
Author(s):  
Seyed Mohsen Sadeghzadeh
Keyword(s):  
Surface Area ◽  
Active Sites ◽  
High Surface ◽  
High Surface Area

In this study, a novel fibrous nanosilica (KCC-1) based nanocatalyst (Au, Pd, and Cu) with a high surface area and easy accessibility of active sites was successfully developed by a facile approach.

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

scholarly journals Catalytic Cracking of n-Hexadecane Using Carbon Nanostructures/Nano-Zeolite-Y Composite Catalyst

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1385
Author(s):  
Botagoz Zhuman ◽  
Shaheen Fatima Anis ◽  
Saepurahman ◽  
Gnanapragasam Singravel ◽  
Raed Hashaikeh
Keyword(s):  
Surface Area ◽  
Catalytic Cracking ◽  
Carbon Nanostructures ◽  
Active Sites ◽  
Zeolite Y ◽  
High Surface ◽  
High Surface Area ◽  
Composite Catalyst ◽  
Homogeneous Distribution ◽  
Binding Material

Zeolite-based catalysts are usually utilized in the form of a composite with binders, such as alumina, silica, clay, and others. However, these binders are usually known to block the accessibility of the active sites in zeolites, leading to a decreased effective surface area and agglomeration of zeolite particles. The aim of this work is to utilize carbon nanostructures (CNS) as a binding material for nano-zeolite-Y particles. The unique properties of CNS, such as its high surface area, thermal stability, and flexibility of its fibrous structure, makes it a promising material to hold and bind the nano-zeolite particles, yet with a contemporaneous accessibility of the reactants to the porous zeolite structure. In the current study, a nano-zeolite-Y/CNS composite catalyst was fabricated through a ball milling approach. The catalyst possesses a high surface area of 834 m2/g, which is significantly higher than the conventional commercial cracking catalysts. Using CNS as a binding material provided homogeneous distribution of the zeolite nanoparticles with high accessibility to the active sites and good mechanical stability. In addition, CNS was found to be an effective binding material for nano-zeolite particles, solving their major drawback of agglomeration. The nano-zeolite-Y/CNS composite showed 80% conversion for hexadecane catalytic cracking into valuable olefins and hydrogen gas, which was 14% higher compared to that of pure nano-zeolite-Y particles.

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.

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