Swapping Catalytic Active Sites from Cationic Ni to Anionic S in Nickel Sulfide Enables More Efficient Alkaline Hydrogen Generation

2022 ◽  
pp. 2103359
Pengyan Wang ◽  
Tingting Wang ◽  
Rui Qin ◽  
Zonghua Pu ◽  
Chengtian Zhang ◽  
Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3783
Jian-Qing Qiu ◽  
Huan-Qing Xie ◽  
Ya-Hao Wang ◽  
Lan Yu ◽  
Fang-Yuan Wang ◽  

The removal of organic pollutants using green environmental photocatalytic degradation techniques urgently need high-performance catalysts. In this work, a facile one-step hydrothermal technique has been successfully applied to synthesize a Nb2O5 photocatalyst with uniform micro-flower structure for the degradation of methyl orange (MO) under UV irradiation. These nanocatalysts are characterized by transmission and scanning electron microscopies (TEM and SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) method, and UV-Vis diffuse reflectance spectroscopy (DRS). It is found that the prepared Nb2O5 micro-flowers presents a good crystal phases and consist of 3D hierarchical nanosheets with 400–500 nm in diameter. The surface area is as large as 48.6 m2 g−1. Importantly, the Nb2O5 micro-flowers exhibit superior catalytic activity up to 99.9% for the photodegradation of MO within 20 mins, which is about 60-fold and 4-fold larger than that of without catalysts (W/O) and commercial TiO2 (P25) sample, respectively. This excellent performance may be attributed to 3D porous structure with abundant catalytic active sites.

ACS Catalysis ◽  
2012 ◽  
Vol 2 (4) ◽  
pp. 684-694 ◽  
Bert D. Chandler ◽  
Shane Kendell ◽  
Hieu Doan ◽  
Rachel Korkosz ◽  
Lars C. Grabow ◽  

2021 ◽  
Daniyal Kiani ◽  
Sagar Sourav ◽  
Jonas Baltrusaitis ◽  
Israel E Wachs

The experimentally validated computational models developed herein, for the first time, show that Mn-promotion does not enhance the activity of the surface Na2WO4 catalytic active sites for CH4 heterolytic dissociation...

RSC Advances ◽  
2017 ◽  
Vol 7 (82) ◽  
pp. 51958-51964 ◽  
Manshu Han ◽  
Shuang Lu ◽  
Jiangang Ma ◽  
Haiyang Xu ◽  
Yinglin Wang ◽  

Vertical Bi2Se3 flake arrays work as counter-electrode in DSSCs due to its high electrical conductivity and abundance of catalytic active sites.

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