scholarly journals New Class of Hybrid Materials for Detection, Capture, and “On-Demand” Release of Carbon Monoxide

2018 ◽  
Vol 10 (16) ◽  
pp. 13693-13701 ◽  
Author(s):  
Anaïs Pitto-Barry ◽  
Alexandru Lupan ◽  
Christopher Ellingford ◽  
Amr A. A. Attia ◽  
Nicolas P. E. Barry
2019 ◽  
Vol 141 (2) ◽  
Author(s):  
Silvan Siegrist ◽  
Henrik von Storch ◽  
Martin Roeb ◽  
Christian Sattler

Three crucial aspects still to be overcome to achieve commercial competitiveness of the solar thermochemical production of hydrogen and carbon monoxide are recuperating the heat from the solid phase, achieving continuous or on-demand production beyond the hours of sunshine, and scaling to commercial plant sizes. To tackle all three aspects, we propose a moving brick receiver–reactor (MBR2) design with a solid–solid heat exchanger. The MBR2 consists of porous bricks that are reversibly mounted on a high temperature transport mechanism, a receiver–reactor where the bricks are reduced by passing through the concentrated solar radiation, a solid–solid heat exchanger under partial vacuum in which the reduced bricks transfer heat to the oxidized bricks, a first storage for the reduced bricks, an oxidation reactor, and a second storage for the oxidized bricks. The bricks may be made of any nonvolatile redox material suitable for a thermochemical two-step (TS) water splitting (WS) or carbon dioxide splitting (CDS) cycle. A first thermodynamic analysis shows that the MBR2 may be able to achieve solar-to-chemical conversion efficiencies of approximately 0.25. Additionally, we identify the desired operating conditions and show that the heat exchanger efficiency has to be higher than the fraction of recombination in order to increase the conversion efficiency.


1987 ◽  
Vol 109 (12) ◽  
pp. 3797-3799 ◽  
Author(s):  
M. G. Kanatzidis ◽  
L. M. Tonge ◽  
T. J. Marks ◽  
H. O. Marcy ◽  
C. R. Kannewurf

Science ◽  
2018 ◽  
Vol 361 (6403) ◽  
pp. 690-693 ◽  
Author(s):  
Rebeca Ribeiro-Palau ◽  
Changjian Zhang ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
James Hone ◽  
...  

In heterostructures of two-dimensional materials, electronic properties can vary dramatically with relative interlayer angle. This effect makes it theoretically possible to realize a new class of twistable electronics in which properties can be manipulated on demand by means of rotation. We demonstrate a device architecture in which a layered heterostructure can be dynamically twisted in situ. We study graphene encapsulated by boron nitride, where, at small rotation angles, the device characteristics are dominated by coupling to a long-wavelength moiré superlattice. The ability to investigate arbitrary rotation angle in a single device reveals features of the optical, mechanical, and electronic response in this system not captured in static rotation studies. Our results establish the capability to fabricate twistable electronic devices with dynamically tunable properties.


2001 ◽  
Vol 79 (5-6) ◽  
pp. 587-592 ◽  
Author(s):  
Christophe Moineau ◽  
Giuseppe Mele ◽  
Howard Alper

The copolymerization of carbon monoxide with different olefins bearing carbamate and amide functionalities was effected using [Pd(CH3CN)4](BF4)2 as the catalyst and (R,R)-Me-DUPHOS (2:1 (v/v) MeNO2–MeOH or CH2Cl2 as the solvent). The products constitute a new class of functionalized copolymers, and were found to be optically active with a mixture of 1,4-ketone and spiroketal repeating units in the backbone. The influence of different parameters on the copolymerization of methyl N-(3-butenyl)carbamate with carbon monoxide was examined.Key words: copolymerization, carbon monoxide, olefins bearing carbamate and amide functionalities.


2015 ◽  
Vol 3 (2) ◽  
pp. 239-242 ◽  
Author(s):  
Sung Jin Park ◽  
Hyeon Mo Cho ◽  
Myong Euy Lee ◽  
Miyoung Kim ◽  
Kwenwoo Han ◽  
...  

Silicon thin films that fulfil the needs of current semiconductor lithography were prepared from a new class of polycyclosilane–polysiloxane hybrid materials.


2007 ◽  
Vol 13 (7) ◽  
pp. 2118-2129 ◽  
Author(s):  
Jean-Michel Barbe ◽  
Gabriel Canard ◽  
Stéphane Brandès ◽  
Roger Guilard

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