Ni, beyond thermodynamic tuning, maintains the catalytic activity of V species in Ni3(VO4)2 doped MgH2

2021 ◽  
Vol 9 (13) ◽  
pp. 8341-8349
Author(s):  
Jiahe Zang ◽  
Shaofei Wang ◽  
Rongrun Hu ◽  
Han Man ◽  
Jichao Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Storage ◽  
Active Species ◽  
Ni Alloy

A bimetallic oxide Ni3(VO4)2 has been synthesized to catalyze the hydrogen storage reaction of MgH2. The formation of the Mg2Ni alloy and the kinetic modulation of V results in a dehydrogenation temperature of 210 °C. The NiV2O4 intermediate active species is also detected.

Effect of CeO$lt;inf$gt;2$lt;/inf$gt;-based Solid Solutions on Hydrogen Storage Kinetic Properties of Mg$lt;inf$gt;2$lt;/inf$gt;Ni Alloy

2014 ◽  
Vol 29 (12) ◽  
pp. 1241
Author(s):  
ZHANG Guo-Fang ◽  
ZHANG Yang-Huan ◽  
LIU Zhuo-Cheng ◽  
XU Jian-Yi ◽  
ZHANG Yin
Keyword(s):  
Hydrogen Storage ◽  
Solid Solutions ◽  
Kinetic Properties ◽  
Ni Alloy

scholarly journals ZnCDs/ZnO@ZIF-8 Zeolite Composites for the Photocatalytic Degradation of Tetracycline

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 934
Author(s):  
Yong Cheng ◽  
Xiuxiu Wang ◽  
Yu Mei ◽  
Dan Wang ◽  
Changchun Ji
Keyword(s):  
Catalytic Activity ◽  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
Active Species ◽  
Degradation Efficiency ◽  
Experimental Result ◽  
Porous Nanostructure ◽  
Resultant Material

Considering the photocatalytic performance of CDs, ZnO, and the unique porous nanostructure and stability of ZIF-8, we prepared ZnCDs/ZnO@ZIF-8 zeolite composites. The resultant material represented an enhanced ability for the photodegradation of TC compared with that of ZnCDs and ZnO. The photocatalytic degradation efficiency reached over 85%. The catalytic activity of the composites was maintained after four cycles. The experimental result indicated that ×O2 radical was the active species in the reaction.

Evolution of the active species and catalytic mechanism of Ti doped NaAlH 4 for hydrogen storage

2017 ◽  
Vol 42 (9) ◽  
pp. 6088-6095 ◽  
Author(s):  
Renjin Xiong ◽  
Ge Sang ◽  
Guanghui Zhang ◽  
Xiayan Yan ◽  
Peilong Li ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Catalytic Mechanism ◽  
Active Species

Superior catalytic activity derived from a two-dimensional Ti3C2 precursor towards the hydrogen storage reaction of magnesium hydride

2016 ◽  
Vol 52 (4) ◽  
pp. 705-708 ◽  
Author(s):  
Yongfeng Liu ◽  
Hufei Du ◽  
Xin Zhang ◽  
Yaxiong Yang ◽  
Mingxia Gao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Storage ◽  
Catalytic Properties ◽  
Magnesium Hydride ◽  
Two Dimensional

A 2D Ti3C2 synthesized by the exfoliation of Ti3AlC2 powders exhibits superior catalytic properties for the hydrogen storage reaction of MgH2.

scholarly journals Effect of Mg-Based of Multi-Layered Structure on Hydrogen Desorption Properties

2019 ◽  
Vol 804 ◽  
pp. 35-40
Author(s):  
Ning Ning Zhou ◽  
Dong Ying Ju
Keyword(s):  
Composite Material ◽  
Hydrogen Storage ◽  
Layered Structure ◽  
Atomic Radius ◽  
Hydrogen Desorption ◽  
Multilayer Composite ◽  
Mixed Powder ◽  
Temperature Range ◽  
Ni Alloy ◽  
Cladding Material

This study proposed the new method of preparing Mg-based composite by mixed powder Ni and Ti onto the surface of pure Mg ingot. The prepared method caused that hydrogen absorbing phase Mg2Ni and catalytic phase NiTi generated and distributed regularly. The pure Mg ingot as the center and the powder Ni and Ti as cladding material on the surface were formed and sintered, in which the temperature range of generated alloy phase Mg2Ni and NiTi was confirmed at first; according to the temperature range, the size of Mg2Ni and NiTi crystal grains at 650°C and 850°C were analyzed and compared, respectively; The size of Mg2Ni alloy phase at the surface and center was calculated by comparing the atomic radius of Ni, Ti to confirm that Mg2Ni distributed on the surface due to the atom Ti replaced the atom Ni in Mg2Ni to generate the alloy phase NiTi; the capacity of the hydrogen desorption reached 4wt% within 5min. The disadvantages that easy to chalking and difficult to activate in the conventional method were avoided and achieved the application of the multilayer composite material in hydrogen storage field.

Excellent catalytic activity of a two-dimensional Nb4C3Tx (MXene) on hydrogen storage of MgH2

2019 ◽  
Vol 493 ◽  
pp. 431-440 ◽  
Author(s):  
Yana Liu ◽  
Haiguang Gao ◽  
Yunfeng Zhu ◽  
Shenyang Li ◽  
Jiguang Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Storage ◽  
Two Dimensional

Enhanced hydrogen storage properties of MgH2 co-catalyzed with K2NiF6 and CNTs

2016 ◽  
Vol 45 (48) ◽  
pp. 19380-19388 ◽  
Author(s):  
N. N. Sulaiman ◽  
M. Ismail
Keyword(s):  
Hydrogen Storage ◽  
Active Species ◽  
Hydrogen Storage Properties ◽  
Unique Structure ◽  
Storage Properties

The active species KF, KH and Mg2Ni together with the unique structure of the CNTs functioned as a real catalyst.

In situ formed ultrafine NbTi nanocrystals from a NbTiC solid-solution MXene for hydrogen storage in MgH2

2019 ◽  
Vol 7 (23) ◽  
pp. 14244-14252 ◽  
Author(s):  
Zeyi Wang ◽  
Xuelian Zhang ◽  
Zhuanghe Ren ◽  
Yong Liu ◽  
Jianjiang Hu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Catalytic Activity ◽  
Hydrogen Storage

In situ formed NbTi nanocrystals from a NbTiC solid-solution MXene offer highly stable catalytic activity for hydrogen storage in MgH2.

The Effect of AlCl3 and Ti on Hydrogen Storage Performance of 4MgH2-Li3AlH6 System

2016 ◽  
Vol 852 ◽  
pp. 876-882
Author(s):  
Fang Yu ◽  
Fen Xu ◽  
Li Xian Sun ◽  
Xiang Fei Zhang ◽  
Lin Wang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Catalytic Activity ◽  
Hydrogen Storage ◽  
Onset Temperature ◽  
High Catalytic Activity ◽  
Storage Performance ◽  
Preparation Conditions ◽  
Solid Ball ◽  
Hydrogen Storage Performance ◽  
Co Doped

The AlCl3/Ti co-doped 4MgH2-Li3AlH6 has been successfully synthesized using solid ball-milled method. The effect of AlCl3/Ti and different preparation conditions on reversible hydrogen storage of 4MgH2-Li3AlH6 were investigated. It was found that the formed Al3Ti and Al can improve the de/rehydriding performance. The onset temperature of the system dehydrogenation decreased to 58 °C, and it can release hydrogen of 7.2 wt.% at 400 °C. The hydriding of the system was found that the adsorption rate greatly increased from 0.02 to 0.35 wt.% min-1. The activation energy (Ea) of MgH2 dehydrogenation decreased from 147 to 113.7 kJ mol-1 by adding additive AlCl3 and Ti. The AlCl3/Ti improved the thermodynamic and kinetic performance of the 4MgH2-Li3AlH6 composite, which was attributed to the high catalytic activity of Al3Ti and Al.

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