Topotactic Transformation of Metal–Organic Frameworks to Graphene-Encapsulated Transition-Metal Nitrides as Efficient Fenton-like Catalysts

ACS Nano ◽  
2016 ◽  
Vol 10 (12) ◽  
pp. 11532-11540 ◽  
Author(s):  
Xuning Li ◽  
Zhimin Ao ◽  
Jiayi Liu ◽  
Hongqi Sun ◽  
Alexandre I. Rykov ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Organic Frameworks ◽  
Metal Nitrides ◽  
Transition Metal Nitrides ◽  
Metal Organic ◽  
Topotactic Transformation

scholarly journals High-Pressure Annealing of a Prestructured Nanocrystalline Precursor to Obtain Tetragonal and Orthorhombic Polymorphs of Hf3N4

2014 ◽  
Vol 1655 ◽  
Author(s):  
Ashkan Salamat ◽  
Pierre Bouvier ◽  
Benjamin M. Gray ◽  
Andrew L. Hector ◽  
Simon A. J. Kimber ◽  
...  
Keyword(s):  
High Pressure ◽  
Transition Metal ◽  
Fluorite Structure ◽  
Metal Nitrides ◽  
Transition Metal Nitrides ◽  
X Ray Diffraction ◽  
Semiconducting Materials ◽  
Composition And Structure ◽  
Metal Organic ◽  
Diamond Anvil

ABSTRACTTransition metal nitrides containing metal ions in high oxidation states are a significant goal for the discovery of new families of semiconducting materials. Most metal nitride compounds prepared at high temperature and high pressure from the elements have metallic bonding. However amorphous or nanocrystalline compounds can be prepared via metal-organic chemistry routes giving rise to precursors with a high nitrogen:metal ratio. Using X-ray diffraction in parallel with high pressure laser heating in the diamond anvil cell this work highlights the possibility of retaining the composition and structure of a metastable nanocrystalline precursor under high pressure-temperature conditions. Specifically, a nanocrystalline Hf3N4 with a tetragonal defect-fluorite structure can be crystallized under high-P,T conditions. Increasing the pressure and temperature of crystallization leads to the formation of a fully recoverable orthorhombic (defect cottunite-structured) polymorph. This approach identifies a novel class of pathways to the synthesis of new crystalline nitrogen-rich transition metal nitrides.

Clustering of oxygen point defects in transition metal nitrides

2021 ◽  
Vol 129 (5) ◽  
pp. 055305
Author(s):  
Rajendra Kumar ◽  
Sanjay Nayak ◽  
Magnus Garbrecht ◽  
Vijay Bhatia ◽  
Ashalatha Indiradevi Kamalasanan Pillai ◽  
...  
Keyword(s):  
Transition Metal ◽  
Point Defects ◽  
Metal Nitrides ◽  
Transition Metal Nitrides

scholarly journals The role of nitrogen in transition-metal nitrides in electrochemical water splitting

2021 ◽  
Author(s):  
Rabia Jamil ◽  
Rashad Ali ◽  
Suraj Loomba ◽  
Jian Xian ◽  
Muhammad Yousaf ◽  
...  
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Metal Nitrides ◽  
Transition Metal Nitrides ◽  
Electrochemical Water Splitting

scholarly journals Magneto-Ionics in Single-Layer Transition Metal Nitrides

2021 ◽  
Author(s):  
Julius de Rojas ◽  
Joaquín Salguero ◽  
Fatima Ibrahim ◽  
Mairbek Chshiev ◽  
Alberto Quintana ◽  
...  
Keyword(s):  
Transition Metal ◽  
Single Layer ◽  
Metal Nitrides ◽  
Transition Metal Nitrides ◽  
Layer Transition
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