Magnetic Ni and Ni/Pt hollow nanospheres and their catalytic activities for hydrolysis of ammonia borane

2014 ◽  
Vol 2 (43) ◽  
pp. 18171-18176 ◽  
Author(s):  
Wenliang Jiao ◽  
Xiaopeng Hu ◽  
Hao Ren ◽  
Pengfei Xu ◽  
Ranbo Yu ◽  
...  
Keyword(s):  
Solvothermal Synthesis ◽  
Hollow Spheres ◽  
Ammonia Borane ◽  
Hollow Nanospheres ◽  
Catalytic Activities ◽  
Pt Hollow Nanospheres ◽  
Hydrolysis Of ◽  
Inside Out

The controllable solvothermal synthesis of hollow nickel nanospheres was achieved via an assembly-then-inside-out evacuation process. The Ni/Pt hollow spheres exhibit high catalytic activities for the hydrolysis of ammonia borane.

Synthesis of mesoporous silica–zirconia composite hollow spheres with enhanced activity toward hydrolysis of ammonia borane

2020 ◽  
Vol 294 ◽  
pp. 109839 ◽  
Author(s):  
Naoki Toyama ◽  
Natsumi Nikura ◽  
Ikaru Ito ◽  
Tetsuo Umegaki ◽  
Yoshiyuki Kojima
Keyword(s):  
Mesoporous Silica ◽  
Hollow Spheres ◽  
Ammonia Borane ◽  
Enhanced Activity ◽  
Hydrolysis Of

Micelle-templated synthesis of Pt hollow nanospheres for catalytic hydrogen evolution

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11370-11377 ◽  
Author(s):  
Manickam Sasidharan ◽  
Piyali Bhanja ◽  
Chenrayan Senthil ◽  
Asim Bhaumik
Keyword(s):  
Hydrogen Evolution ◽  
Wall Thickness ◽  
Ammonia Borane ◽  
Hollow Nanospheres ◽  
Void Space ◽  
Templated Synthesis ◽  
Simple Strategy ◽  
Catalytic Hydrogen ◽  
Catalytic Hydrogen Evolution ◽  
Pt Hollow Nanospheres

We report an efficient, mild and simple strategy for the fabrication of colloidal hollow platinum nanospheres with the ability to tune wall-thickness and void-space over several nanometers, for application in hydrogen evolution from ammonia–borane.

Cobalt hollow nanospheres: controlled synthesis, modification and highly catalytic performance for hydrolysis of ammonia borane

2017 ◽  
Vol 62 (5) ◽  
pp. 326-331 ◽  
Author(s):  
Wangya Wei ◽  
Zumin Wang ◽  
Jie Xu ◽  
Lingbo Zong ◽  
Kun Zhao ◽  
...  
Keyword(s):  
Ammonia Borane ◽  
Catalytic Performance ◽  
Controlled Synthesis ◽  
Hollow Nanospheres ◽  
Hydrolysis Of

Methanol-mediated Solvothermal Synthesis of Hexagonal CdS Hollow Nanospheres

2009 ◽  
Vol 24 (1) ◽  
pp. 61-64 ◽  
Author(s):  
Lin-Lin ZHENG ◽  
Shou-Ai FENG ◽  
Feng GAO ◽  
Zhen-Ping ZHU
Keyword(s):  
Solvothermal Synthesis ◽  
Hollow Nanospheres

scholarly journals Catalytic activity and stereoselectivity of engineered phosphotriesterases towards structurally different nerve agents in vitro

2021 ◽  
Author(s):  
Anja Köhler ◽  
Benjamin Escher ◽  
Laura Job ◽  
Marianne Koller ◽  
Horst Thiermann ◽  
...  
Keyword(s):  
Plasma Clearance ◽  
Nerve Agents ◽  
Inhibition Assay ◽  
Ache Inhibition ◽  
Catalytic Activities ◽  
Chiral Lc ◽  
Hydrolysis Of ◽  
Medical Countermeasures

AbstractHighly toxic organophosphorus nerve agents, especially the extremely stable and persistent V-type agents such as VX, still pose a threat to the human population and require effective medical countermeasures. Engineered mutants of the Brevundimonas diminuta phosphotriesterase (BdPTE) exhibit enhanced catalytic activities and have demonstrated detoxification in animal models, however, substrate specificity and fast plasma clearance limit their medical applicability. To allow better assessment of their substrate profiles, we have thoroughly investigated the catalytic efficacies of five BdPTE mutants with 17 different nerve agents using an AChE inhibition assay. In addition, we studied one BdPTE version that was fused with structurally disordered PAS polypeptides to enable delayed plasma clearance and one bispecific BdPTE with broadened substrate spectrum composed of two functionally distinct subunits connected by a PAS linker. Measured kcat/KM values were as high as 6.5 and 1.5 × 108 M−1 min−1 with G- and V-agents, respectively. Furthermore, the stereoselective degradation of VX enantiomers by the PASylated BdPTE-4 and the bispecific BdPTE-7 were investigated by chiral LC–MS/MS, resulting in a several fold faster hydrolysis of the more toxic P(−) VX stereoisomer compared to P(+) VX. In conclusion, the newly developed enzymes BdPTE-4 and BdPTE-7 have shown high catalytic efficacy towards structurally different nerve agents and stereoselectivity towards the toxic P(−) VX enantiomer in vitro and offer promise for use as bioscavengers in vivo.

ISOBAM-stabilized Ni2+ colloidal catalysts: high catalytic activities for hydrogen generation from hydrolysis of KBH4

2020 ◽  
Vol 31 (13) ◽  
pp. 134003 ◽  
Author(s):  
Yuantao Pei ◽  
Liqiong Wang ◽  
Liang Huang ◽  
Yuetong Hu ◽  
Quanli Jia ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Catalytic Activities ◽  
Hydrolysis Of
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