Recent advances and strategies to tailor the energy levels, active sites and electron mobility in titania and its doped/composite analogues for hydrogen evolution in sunlight

2019 ◽  
Vol 9 (1) ◽  
pp. 12-46 ◽  
Author(s):  
R. Shwetharani ◽  
M. Sakar ◽  
C. A. N. Fernando ◽  
Vassilis Binas ◽  
R. Geetha Balakrishna
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Electron Mobility ◽  
Active Sites ◽  
Sustainable Energy ◽  
Energy Levels ◽  
Energy Generation ◽  
Water Reduction ◽  
Recent Advances ◽  
Renewable And Sustainable Energy

Hydrogen production through photocatalytic water reduction, a potential path for future renewable and sustainable energy generation.

Colocalization of Light Harvesting and Catalytic Units in ‘Soft’ Coordination Polymer Hydrogel toward Visible-Light Driven Photocatalytic Hydrogen Production

2021 ◽  
Author(s):  
Parul Verma ◽  
Ashish Singh ◽  
Faruk Ahamed Rahimi ◽  
Tapas Kumar Maji
Keyword(s):  
Hydrogen Production ◽  
Coordination Polymer ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Light Harvesting ◽  
Sustainable Energy ◽  
Supramolecular Assembly ◽  
Polymer Hydrogel ◽  
Visible Light Driven ◽  
Molecular Components

Colocalization of essential molecular components in the solvated soft supramolecular assembly towards realizing visible-light-driven hydrogen evolution would be an exciting approach for sustainable energy by generating clean solar fuel. In...

Hexagonal SiC with spatially separated active sites on polar and nonpolar facets achieving enhanced hydrogen production from photocatalytic water reduction

2018 ◽  
Vol 20 (7) ◽  
pp. 4787-4792 ◽  
Author(s):  
Da Wang ◽  
Ning Liu ◽  
Zhongnan Guo ◽  
Wenjun Wang ◽  
Liwei Guo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Water Splitting ◽  
Active Sites ◽  
Spatial Separation ◽  
Water Reduction

The spatial separation of the photo-generated electrons and holes between the polar Si-{0001} and non-polar {10−10} crystal facets on 6H-SiC highly improves the photocatalytic activity of water splitting by nearly 5 times.

Sediment microbial fuel cells as a new source of renewable and sustainable energy: present status and future prospects

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 94171-94183 ◽  
Author(s):  
Atieh Zabihallahpoor ◽  
Mostafa Rahimnejad ◽  
Farid Talebnia
Keyword(s):  
Organic Matter ◽  
Fuel Cells ◽  
Low Power ◽  
Production Technology ◽  
Present Status ◽  
Microbial Fuel Cells ◽  
Sustainable Energy ◽  
Future Prospects ◽  
Recent Advances ◽  
Renewable And Sustainable Energy

SMFCs are a bioelectricity production technology for low power applications. Recent advances in SMFCs are investigated to enhance their performance. Power improvement and organic matter reduction in SMFCs enlarge their range of applications.

Ru single atoms and nanoclusters on highly porous N–doped carbon as hydrogen evolution catalyst in alkaline solutions with ultrahigh mass activity and turnover frequency

2021 ◽  
Author(s):  
Yijun Li ◽  
Huijing Liu ◽  
Bing Li ◽  
Zhenzhen Yang ◽  
Zhenguo Guo ◽  
...  
Keyword(s):  
Energy Source ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Active Sites ◽  
Sustainable Energy ◽  
Alkaline Solutions ◽  
Turnover Frequency ◽  
Single Atoms ◽  
Mass Activity ◽  
Highly Porous

Electrocatalytic water splitting is one of the most desirable ways to provide hydrogen which is a clean and sustainable energy source. Improving the formation and the exposure of active sites...

Acetylenic bond-driven efficient hydrogen production of a graphdiyne based catalyst

2021 ◽  
Vol 5 (5) ◽  
pp. 2247-2254
Author(s):  
Ling Bai ◽  
Zhiqiang Zheng ◽  
Zhongqiang Wang ◽  
Feng He ◽  
Yurui Xue ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
High Hydrogen ◽  
Acetylenic Bond ◽  
Reaction Performance

3D acetylenic bonds distributing makes tetraphenyl methane substitute graphdiyne (TPM-GDY) show more active sites and high hydrogen evolution reaction performance.

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.

scholarly journals Facile Fabrication of Rhodium/Nanodiamond Hybrid as Advanced Catalyst toward Hydrogen Production from Ammonia–Borane

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1037
Author(s):  
Zhaoyu Wen ◽  
Jie Wu ◽  
Guangyin Fan
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Active Sites ◽  
Hydrogen Generation ◽  
Ammonia Borane ◽  
Green Energy ◽  
Homogeneous Distribution ◽  
High Turnover ◽  
Design And Synthesis ◽  
Facile Fabrication

Hydrogen generation through ammonia–borane (AB) hydrolysis has been regarded as one of the most promising pathways to tap renewable green energy. The design and synthesis of highly effective catalysts toward hydrogen production from aqueous AB is of paramount significance. Here, the facile synthesis of Rh nanoparticles (NPs) immobilized on nanodiamond (nano-DA) and concomitant AB hydrolysis to produce hydrogen was successfully achieved. The in situ generated Rh/nano-DA exhibited excellent catalytic activity toward AB hydrolysis, with a high turnover frequency (TOF) value of 729.4 min−1 at 25 °C and a low activation energy of 25.6 kJ mol−1. Moreover, the catalyst could be reused four times. The unique properties of DA with abundant oxygen-containing groups enable the homogeneous distribution of small and surface-clean Rh NPs on the nano-DA surface, which can supply abundant accessible active sites for hydrogen evolution from AB hydrolysis. This study demonstrated that nano-DA can be applied as an ideal matrix to deposit efficient Rh nanocatalyst toward hydrogen evolution reaction.

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