scholarly journals A functionalised nickel cyclam catalyst for CO2 reduction: electrocatalysis, semiconductor surface immobilisation and light-driven electron transfer

2015 ◽  
Vol 17 (3) ◽  
pp. 1562-1566 ◽  
Author(s):  
Gaia Neri ◽  
James J. Walsh ◽  
Calum Wilson ◽  
Anna Reynal ◽  
Jason Y. C. Lim ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Low Cost ◽  
Co2 Reduction ◽  
Semiconductor Surface ◽  
Covalent Immobilisation

Covalent immobilisation of a low cost electrocatalyst leads to an enhanced rate of photoelectron transfer from a light absorbing semiconductor.

Graphene Supported Tungsten Carbide as Catalyst for Electrochemical Reduction of CO2

2019 ◽  
Author(s):  
Sahithi Ananthaneni ◽  
Rees Rankin
Keyword(s):  
Tungsten Carbide ◽  
Electrochemical Reduction ◽  
Low Cost ◽  
Co2 Reduction ◽  
Platinum Group Metal ◽  
Reduction Reaction ◽  
Metal Carbides ◽  
Depth Study ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction

<div>Electrochemical reduction of CO2 to useful chemical and fuels in an energy efficient way is currently an expensive and inefficient process. Recently, low-cost transition metal-carbides (TMCs) are proven to exhibit similar electronic structure similarities to Platinum-Group-Metal (PGM) catalysts and hence can be good substitutes for some important reduction reactions. In this work, we test graphenesupported WC (Tungsten Carbide) nanocluster as an electrocatalyst for the CO2 reduction reaction. Specifically, we perform DFT studies to understand various possible reaction mechanisms and determine the lowest thermodynamic energy landscape of CO2 reduction to various products such as CO, HCOOH, CH3OH, and CH4. This in-depth study of reaction energetics could lead to improvements and develop more efficient electrocatalysts for CO2 reduction.<br></div>

scholarly journals Molecular Engineering for High-Performance Fullerene Broadband Photodetector

2021 ◽  
Author(s):  
Mingming Su ◽  
Yajing Hu ◽  
Ao Yu ◽  
Zhiyao Peng ◽  
Wangtao Long ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Low Temperature ◽  
Electron Acceptor ◽  
Photoinduced Electron Transfer ◽  
High Performance ◽  
Organic Molecules ◽  
Low Cost ◽  
Molecular Engineering ◽  
Temperature Requirement ◽  
High Flexibility

Broadband photodetectors fabricated with organic molecules have the advantages of low cost, high flexibility, easy processing and low-temperature requirement. Fullerene molecules, due to the electron acceptor and photoinduced electron transfer...

Effective Measures for CO2 Reduction Harnessing the Potential Water Energy Present in the Water Service Industry

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
Ohbuchi Yoshihiro ◽  
Sasaki Takanori ◽  
Sumitomo Hiroaki ◽  
Saito Susumu ◽  
Tanaka Yoshiaki
Keyword(s):  
Power Generation ◽  
Water Purification ◽  
Service Industry ◽  
Low Cost ◽  
Co2 Reduction ◽  
Clean Energy ◽  
Net Benefit ◽  
Private Company ◽  
Joint Project ◽  
Purification Plant

Sapporo Waterworks Bureau's (SWB's) measures for CO2 reduction started in 1982 with a hydropower project at the Moiwa Water Purification Plant (MWPP) (cap. 155,000 m3/day). Operation of the generator was temporarily discontinued in 2001 for full-scale reconstruction of the water purification plant (WPP); after the completion of the reconstruction, the power generation equipment was renewed, and the operation resumed as a joint project with a private company in 2007. Power generation is on-site since the hydropower generator within the MWPP area provides energy consumed at the MWPP and the adjoining Waterworks Museum. This power generation is expected to create an energy saving effect equivalent to 1,500 tons of CO2 and over 10 million yen of annual net benefit. In order to increase the usage rate of low-cost, clean energy like hydropower at the WPP, SWB has made a series of adjustments to the operating methods of the plant. Then, as a result, the generation covers 97% of the energy used on-site at present. Furthermore, SWB is considering introducing other hydropower facilities of this kind that harness water transmission energy from the Shiraikawa WPP (cap. 650,000 m3/day) to the major distribution reservoirs.

scholarly journals Copper Oxide-Based Photocatalysts and Photocathodes: Fundamentals and Recent Advances

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7271
Author(s):  
Tomasz Baran ◽  
Alberto Visibile ◽  
Michael Busch ◽  
Xiufang He ◽  
Szymon Wojtyla ◽  
...  
Keyword(s):  
New Technologies ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Co2 Reduction ◽  
Chemical Properties ◽  
Water Electrolysis ◽  
Pollutant Emissions ◽  
Low Toxicity ◽  
Abundant Element ◽  
Direct Use

This work aims at reviewing the most impactful results obtained on the development of Cu-based photocathodes. The need of a sustainable exploitation of renewable energy sources and the parallel request of reducing pollutant emissions in airborne streams and in waters call for new technologies based on the use of efficient, abundant, low-toxicity and low-cost materials. Photoelectrochemical devices that adopts abundant element-based photoelectrodes might respond to these requests being an enabling technology for the direct use of sunlight to the production of energy fuels form water electrolysis (H2) and CO2 reduction (to alcohols, light hydrocarbons), as well as for the degradation of pollutants. This review analyses the physical chemical properties of Cu2O (and CuO) and the possible strategies to tune them (doping, lattice strain). Combining Cu with other elements in multinary oxides or in composite photoelectrodes is also discussed in detail. Finally, a short overview on the possible applications of these materials is presented.

Photoinduced electron transfer dynamics in dye-sensitized ZnO nanowire photoanodes

2018 ◽  
Vol 32 (19) ◽  
pp. 1840049
Author(s):  
Akihiro Furube ◽  
Takahiro Arai ◽  
Masahiro Okazaki ◽  
Shinichiro Yanagiya ◽  
Liang-Yih Chen ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Transient Absorption ◽  
Low Cost ◽  
Transient Absorption Spectroscopy ◽  
Zno Nanowire ◽  
Dye Sensitized ◽  
Femtosecond Transient Absorption ◽  
State Formula ◽  
Flexible Solar Cell

A photoanode using dye-sensitized ZnO nanowire (NW) is a good candidate for low-cost, colorful, light-weight and flexible solar cell material. We have synthesized a ZnO NW anode and a ZnO nanowire–nanoparticle (NWNP) anode, in which ZnO nanoparticles (NPs) are decollated on the surface of NWs. Photo-induced electron transfer dynamics from the excited state of sensitizer dye (D149) to the conduction band of ZnO NW and ZnO NWNP was clarified using femtosecond transient absorption spectroscopy. The decay of the single excited state ([Formula: see text]) of D149 was faster in ZnO NW than that of ZnO NWNP, indicating that NW is more suitable as an efficient electron acceptor.

Bioconversion of Carbon Monoxide to Formate Using Artificially Designed Carbon Monoxide:Formate Oxidoreductase in Hyperthermophilic Archaea

2021 ◽  
Author(s):  
Jae Kyu Lim ◽  
Ji-In Yang ◽  
Yun Jae Kim ◽  
Yeong-Jun Park ◽  
Yong Hwan Kim
Keyword(s):  
Carbon Monoxide ◽  
Electron Transfer ◽  
Fusion Protein ◽  
Direct Electron Transfer ◽  
Co2 Reduction ◽  
Hyperthermophilic Archaea ◽  
Production Activity ◽  
Formate Production

Abstract Ferredoxin-dependent metabolic engineering of electron transfer circuits has been developed to enhance redox efficiency in the field of synthetic biology, e.g., for hydrogen production and for reduction of flavoproteins or NAD(P)+. Here, we present the bioconversion of carbon monoxide (CO) gas to formate via a synthetic CO:formate oxidoreductase (CFOR), designed as an enzyme complex for direct electron transfer between noninteracting CO dehydrogenase and formate dehydrogenase using an electron-transferring Fe-S fusion protein. The CFOR-introduced Thermococcus onnurineus mutant strains showed CO-dependent formate production in vivo and in vitro. The formate production rate from purified CFOR complex and specific formate productivity from the bioreactor were 348 ± 34 μmol/mg/min and 90.2 ± 20.4 mmol/g-cells/h, respectively. The CO-dependent CO2 reduction/formate production activity of synthetic CFOR was confirmed, indicating that direct electron transfer between two unrelated dehydrogenases was feasible via mediation of the FeS-FeS fusion protein.

scholarly journals Proton-coupled electron transfer in the electrocatalysis of CO2 reduction: prediction of sequential vs. concerted pathways using DFT

2017 ◽  
Vol 8 (1) ◽  
pp. 458-465 ◽  
Author(s):  
Adrien J. Göttle ◽  
Marc T. M. Koper
Keyword(s):  
Electron Transfer ◽  
Co2 Reduction ◽  
Electrocatalytic Reduction ◽  
Cobalt Porphyrin ◽  
Proton Coupled Electron Transfer ◽  
Detailed Picture

We provide a complete and computationally detailed picture of the mechanism of the initial stages of the electrocatalytic reduction of CO2 in water catalysed by cobalt porphyrin complexes.

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