Microwave-triggered low temperature thermal reduction of Zr-modified high entropy oxides with extraordinary thermochemical H2 production performance

2022 ◽  
Vol 252 ◽  
pp. 115125
Author(s):  
Yibo Gao ◽  
Miaomaio Zhang ◽  
Yanpeng Mao ◽  
Han Cao ◽  
Shujuan Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thermal Reduction ◽  
H2 Production ◽  
Production Performance ◽  
High Entropy

scholarly journals Conventional and Electromagnetic-induction Sintering of High Entropy Alloys for Low-temperature Applications

2020 ◽  
Vol 26 (S2) ◽  
pp. 2916-2917
Author(s):  
Luis Laguna Zubia ◽  
C.G. Garay-Reyes ◽  
M.A. Ruiz-Esparza-Rodriguez ◽  
J.M. Mendoza-Duarte ◽  
Ivanovich Estrada ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electromagnetic Induction ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Temperature Applications

scholarly journals Microstructure Refinement by Low-Temperature Ausforming in an Fe-Based Metastable High-Entropy Alloy

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 742
Author(s):  
Motomichi Koyama ◽  
Takeaki Gondo ◽  
Kaneaki Tsuzaki
Keyword(s):  
Low Temperature ◽  
Plastic Anisotropy ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Microstructure Refinement ◽  
Hexagonal Close Packed ◽  
Solution Treated Condition ◽  
Solution Treated ◽  
Face Centered

The effects of ausforming in an Fe30Mn10Cr10Co high-entropy alloy on the microstructure, hardness, and plastic anisotropy were investigated. The alloy showed a dual-phase microstructure consisting of face-centered cubic (FCC) austenite and hexagonal close-packed (HCP) martensite in the as-solution-treated condition, and the finish temperature for the reverse transformation was below 200 °C. Therefore, low-temperature ausforming at 200 °C was achieved, which resulted in microstructure refinement and significantly increased the hardness. Furthermore, plasticity anisotropy, a common problem in HCP structures, was suppressed by the ausforming treatment. This, in turn, reduced the scatter of the hardness.

scholarly journals Low-temperature combustion of methane over graphene templated Co3O4 defective-nanoplates

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dian Gong ◽  
Gaofeng Zeng
Keyword(s):  
Low Temperature ◽  
Transition Metal Oxides ◽  
Active Oxygen Species ◽  
Low Cost ◽  
Thermal Reduction ◽  
Low Temperature Combustion ◽  
Solid Catalysts ◽  
Intermittent Feeding ◽  
Co Precipitation ◽  
Catalytic Combustion Of Methane

AbstractTransition metal oxides are the potential catalysts to replace noble-metal based catalyst for the catalytic combustion of methane due to the tolerable reactivity and low cost. However, these catalysts are challenged by the low temperature reactivity. Herein, the surface defective Co3O4 nanoplates are realized through a facile co-precipitation and thermal reduction method with the association of GO. The resultant catalysts (CoGO50) demonstrate a superior low-temperature reactivity for the methane oxidation to CO2 and H2O in comparison with the common Co3O4 catalyst. The reliable stability of CoGO50 catalyst was proved by 80 h testing with intermittent feeding of water vapor. The experimental analysis demonstrates that the presence of a small amount of GO significantly affects the catalysts in surface valence state, active oxygen species and surface oxygen vacancies through reacting with the cobalt oxide as a reductant. Moreover, GO plays as 2D confine template to form smaller and thinner nanoplates. This work provides a facile method to control the surface properties of catalyst not only for Co3O4 based catalysts but also for wider solid catalysts.

Microbial Abundance and Community Composition Influence Production Performance in a Low-Temperature Petroleum Reservoir

2014 ◽  
Vol 48 (9) ◽  
pp. 5336-5344 ◽  
Author(s):  
Guoqiang Li ◽  
Peike Gao ◽  
Yunqiang Wu ◽  
Huimei Tian ◽  
Xuecheng Dai ◽  
...  
Keyword(s):  
Low Temperature ◽  
Community Composition ◽  
Production Performance ◽  
Microbial Abundance ◽  
Petroleum Reservoir

Molten-salt nitridation synthesis of cubic ZrN nanopowders at low temperature via magnesium thermal reduction

2018 ◽  
Vol 44 (7) ◽  
pp. 8710-8715 ◽  
Author(s):  
Yang Chen ◽  
Chengji Deng ◽  
Chao Yu ◽  
Jun Ding ◽  
Hongxi Zhu
Keyword(s):  
Low Temperature ◽  
Molten Salt ◽  
Thermal Reduction ◽  
Magnesium Thermal Reduction

Local chemical fluctuation mediated ultra-sluggish martensitic transformation in high-entropy intermetallics

2022 ◽  
Author(s):  
Y. Wu ◽  
Fei Zhang ◽  
Fengshou Li ◽  
Yi Yang ◽  
Jiaming Zhu ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Low Temperature ◽  
Aerospace Industry ◽  
Engineering Applications ◽  
High Entropy ◽  
Temperature Range ◽  
Working Temperature

Superelasticity associated with the martensitic transformation has found a broad range of engineering applications such as low-temperature devices in aerospace industry. Nevertheless, the narrow working temperature range and strong temperature...

scholarly journals Graphitic carbon nitride with thermally-induced nitrogen defects: an efficient process to enhance photocatalytic H2 production performance

RSC Advances ◽  
2020 ◽  
Vol 10 (32) ◽  
pp. 18632-18638 ◽  
Author(s):  
Guangzhi Dong ◽  
Yun Wen ◽  
Huiqing Fan ◽  
Chao Wang ◽  
Zhenxiang Cheng ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Carbon Nitride ◽  
Treatment Method ◽  
H2 Production ◽  
Graphitic Carbon ◽  
Production Performance ◽  
Graphitic Carbon Nitride ◽  
Thermally Induced ◽  
Efficient Process

An efficient thermal-treatment method was developed for the preparation of defect modified g-C3N4 with excellent photocatalytic H2 production performance.

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