Catalytic Mechanism and Design Principle of Coordinately Unsaturated Single Metal Atom-Doped Covalent Triazine Frameworks with High Activity and Selectivity for CO2 Electroreduction

2021 ◽  
Author(s):  
Lele Gong ◽  
Xiaowei Wang ◽  
Tao Zheng ◽  
Jerry Liu ◽  
Jie Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Activity ◽  
Metal Atom ◽  
Design Principle ◽  
High Selectivity ◽  
Catalytic Mechanism ◽  
Direct Conversion ◽  
Greenhouse Emissions ◽  
Co2 Electroreduction ◽  
Carbon Dioxide Co2

Direct conversion of carbon dioxide (CO2) to chemicals or fuels can mitigate greenhouse emissions and reduce dependence on petrochemicals, but experimentally finding an electrocatalyst with high selectivity for desired final...

Measuring complex for monitoring carbon dioxide in air

2021 ◽  
pp. 68-71
Author(s):  
Igor M. Ageev ◽  
Yuri M. Rybin
Keyword(s):  
Carbon Dioxide ◽  
High Selectivity ◽  
Distilled Water ◽  
Measuring Systems ◽  
Advantages And Disadvantages ◽  
Measuring Complex ◽  
Co2 Level ◽  
Carbon Dioxide Co2 ◽  
Term Monitoring

The advantages and disadvantages of infrared and electrochemical gas analyzers for carbon dioxide CO2 are described. The possibility of using conductometric sensors with distilled water for monitoring the CO2 content in the air has been investigated. Two identical measuring systems were manufactured, each containing two open-type conductometric cells, a matching device and a personal computer. With the help of these complexes, experiments were carried out on the simultaneous measurement of the CO2 content in the air in two places (a laboratory room and a building in a forest, located at a distance of 15 km from each other) with deliberately different daily dynamics of the CO2 level change. A special experiment was carried out, which made it possible to obtain an estimate of the inertia of conductometric cells and a conversion factor for the values of CO2 content into standard units of measurement. It is shown that the daily dynamics of changes in the electrical conductivity of distilled water in open cells corresponds to the expected dynamics of changes in the CO2 content in the rooms where the measurements were carried out. The operability of the measuring complex and the possibility of creating on its basis a device for long-term monitoring of the CO2 content in the air mixture of gases has been confirmed. The principal high selectivity of the measuring complex to CO2 in relation to other gases of the atmosphere has been established.

Rigorous assessment of CO2 electroreduction products in a flow cell

2021 ◽  
Author(s):  
Zhuang-Zhuang Niu ◽  
Li-Ping Chi ◽  
Ren Liu ◽  
Zhi Chen ◽  
Min-Rui Gao
Keyword(s):  
Carbon Dioxide ◽  
Flow Cell ◽  
Renewable Electricity ◽  
Electrochemical Conversion ◽  
Co2 Electroreduction ◽  
Carbon Dioxide Co2 ◽  
Carbon Based

Electrochemical conversion of carbon dioxide (CO2) into valuable carbon-based chemicals provides a route to store renewable electricity and close the carbon loop. In comparison to the conventional "H-cells", the flow-cell...

A novel phosphotungstic acid-supported single metal atom catalyst with high activity and selectivity for the synthesis of NH3 from electrochemical N2 reduction: a DFT prediction

2019 ◽  
Vol 7 (34) ◽  
pp. 19838-19845 ◽  
Author(s):  
Liye Gao ◽  
Feiteng Wang ◽  
Ming-an Yu ◽  
Fenfei Wei ◽  
Jiamin Qi ◽  
...  
Keyword(s):  
High Activity ◽  
Metal Atom ◽  
High Selectivity ◽  
Phosphotungstic Acid ◽  
Reduction Reaction ◽  
Nitrogen Reduction

A phosphotungstic acid-supported single metal atom is a potential electrocatalyst for the nitrogen reduction reaction with high activity and high selectivity.

Catalysts for the Electrochemical Reduction of Carbon Dioxide to Methanol

2020 ◽  
Vol 17 (4) ◽  
Author(s):  
Qi Hang Low ◽  
Boon Siang Yeo
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reduction ◽  
Fossil Fuels ◽  
Negative Impact ◽  
Anthropogenic Activities ◽  
Renewable Electricity ◽  
Co2 Electroreduction ◽  
Carbon Dioxide Co2 ◽  
Reduction Of Co2 ◽  
Made In

Abstract Anthropogenic activities powered by the burning of fossil fuels have caused excessive emissions of carbon dioxide (CO2) to the atmosphere. This has a negative impact on our environment. One promising approach to reduce the concentration of atmospheric CO2 is to convert it to useful products. This could be achieved via the electrochemical reduction of CO2 using renewable electricity. Methanol (CH3OH), a valuable fuel and feedstock, is one of the CO2 electroreduction products. However, its formation, thus far, has been plagued by the inadequacy of functional electrocatalysts. In this review, we summarize progresses made in the development of methanol-selective electrocatalysts, which provides us with a basis to discuss the underlying challenges of electroreducing CO2 to methanol.

PERANCANGAN PROTEKSI KEBAKARAN OTOMATIS PADA KAPAL BERBASIS ARDUINO

2018 ◽  
Vol 1 (2) ◽  
pp. 1-8
Author(s):  
Dody Hidayat
Keyword(s):  
Carbon Dioxide ◽  
Fire Extinguisher ◽  
Carbon Dioxide Co2

Kebakaran dapat terjadi dimana saja salah satunya dapat terjadi di alat transportasi air yakni kapal. Kebakaran selalu menyebabkan hal-hal yang tidak diinginkan baik kerugian material maupun ancaman keselamatan jiwa manusia. Seiring dari kejadian tersebut musibah kecelakaan kapal yang disebabkan oleh bahaya kebakaran sangatlah mungkin terjadi. Salah satu yang dapat mencegah kejadian kebakaran pada kapal haruslah dapat mendeteksi dini kebakaran tersebut. Untuk mendeteksi dini terjadinya kebakaran dikapal maka dirancanglah sebuah alat proteksi kebakaran otomatisberbasis adruino. Dimana Arduino merupakan board yang memiliki sebuah mikrokontroller sebagai  otak kendali sistem. Sistem otomatisasi atau controller tidak akan terlepas dengan apa yang disebut  dengan ‘sensor’. Sensor adalah sebuah alat untuk mendeteksi atau mengukut sesuatu yang digunakan untuk mengubah variasi mekanis, magnetis, panas, sinar dan kimia menjadi tegangan dan arus listrik. sistem yang dirancang ini dilengkapi dengan beberapa sensor diantaranya adalah sensor apiUV-Tron R2868, sensor asap MQ-2 dan kemudian sensor suhuDS18B20. Mikrokontroller sebagai pengendali akan merespon input yang berupa sensor tersebut ketika data yang dibaca oleh sensor mendeteksikebakaran diantaranya mendeteksi adanya asap, kemudian api dan suhu. Sebagai output dari sistem berupa racun api (fire extinguisher)dimana kandungan yang ada pada racun api tersebut berupa Dry Chemical Powder dan Carbon Dioxide (CO2) yang fungsinya digunakan untuk memadamkan api serta dilengkapi buzzer sebagai alarm peringatan jika terjadi kebakaran. 

The Prenatal Development Effects of Carbon Dioxide (CO2) Exposure in Rats (Rattus Norvegicus)

2012 ◽  
Author(s):  
William R. Howard ◽  
Brian Wong ◽  
Michelle Okolica ◽  
Kimberly S. Bynum ◽  
R. A. James
Keyword(s):  
Carbon Dioxide ◽  
Rattus Norvegicus ◽  
Prenatal Development ◽  
Carbon Dioxide Co2

Physiology of Intraluminal Administration of Carbon Dioxide as a Contrast Medium

2020 ◽  
Vol 25 (44) ◽  
pp. 4656-4661 ◽  
Author(s):  
Nikolaos Patelis ◽  
Mikes Doulaptsis ◽  
Stylianos Kykalos ◽  
Eleftherios Spartalis ◽  
Anastasios Maskanakis ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Contrast Agent ◽  
20Th Century ◽  
English Literature ◽  
Human Organism ◽  
Digital Subtraction ◽  
Extensive Search ◽  
Iodinated Contrast ◽  
Iodinated Contrast Agent ◽  
Carbon Dioxide Co2

Background: Carbon dioxide (CO2) exists in nature around us. In the middle of the 20th century, the intraluminal injection of CO2 demonstrated similar results to those of Digital Subtraction Angiography (DSA) with an iodinated contrast agent (ICA). Since then, the technology behind CO2 DSA has developed significantly. Objective: The aim of this study is to inform physicians about the unique properties of CO2 and its physiology after intraluminal injection. Methods: An extensive search for English literature on the properties of CO2 and the physiology of intraluminal administration was conducted using Pubmed. Results: There is sufficient literature on the properties of CO2 and the physiology of CO2 DSA. A review of this literature explains what happens to the human organism after the injection of CO2. Conclusions: There is enough evidence that CO2 DSA is both effective, diagnostic and safe, but the properties of CO2 should be taken under consideration as complications occur, although rarely.

scholarly journals Carbon Dioxide Laser Vulvovaginal Rejuvenation: A Systematic Review

Cosmetics ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 56
Author(s):  
Tassahil Messas ◽  
Achraf Messas ◽  
George Kroumpouzos
Keyword(s):  
Carbon Dioxide ◽  
Systematic Review ◽  
Laser Therapy ◽  
Carbon Dioxide Laser ◽  
Invasive Treatment ◽  
Erbium:Yag Laser ◽  
Non Invasive ◽  
Level I ◽  
Carbon Dioxide Co2

Genitourinary syndrome of menopause (GSM) causes significant symptomatic aggravation that affects the quality of life (QoL). Vulvovaginal atrophy (VVA), the hallmark of GSM, is managed with topical non-hormonal therapy, including moisturizers and lubricants, and topical estrogen application. Patients not responding/being unsatisfied with previous local estrogen therapies are candidates for a noninvasive modality. Carbon dioxide (CO2) laser therapy, especially the fractionated type (FrCO2), has drawn considerable attention over the past two decades as a non-invasive treatment for GSM. This systematic review describes the accumulated evidence from 40 FrCO2 laser studies (3466 participants) in GSM/VVA. MEDLINE, Scopus and Cochrane databases were searched through April 2021. We analyze the effects of FrCO2 laser therapy on symptoms, sexual function, and QoL of patients with GSM/VVA. As shown in this review, FrCO2 laser therapy for GSM shows good efficacy and safety. This modality has the potential to advance female sexual wellness. Patient satisfaction was high in the studies included in this systematic review. However, there is a lack of level I evidence, and more randomized sham-controlled trials are required. Furthermore, several clinical questions, such as the number of sessions required that determine cost-effectiveness, should be addressed. Also, whether FrCO2 laser therapy may exert a synergistic effect with systemic and/or local hormonal/non-hormonal treatments, energy-based devices, and other modalities to treat GMS requires further investigation. Lastly, studies are required to compare FrCO2 laser therapy with other energy-based devices such as erbium:YAG laser and radiofrequency.

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