Solar pyrometallurgy—An historic review

Neelameggham, Neale R.

doi:10.1007/s11837-008-0018-y

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…The sp group metals [6][7][8][9][28][29][30][31][32][33][34] have been applied more commonly with high current efficiency for the production of formic acid arising from their excellent ability to suppress hydrogen generation that tends to compete with the formation of the desired products. [30,35] Neelameggham et al [36] also reported that formic acid from CO 2 could be kinetically more favored by electrodes such as Mo, Cu, In, Sn, and Sb, since they are regarded as a poor catalysts for water reduction.…”

Section: Choice Of Catalysts and Desired Productsmentioning

confidence: 99%

Electrocatalytic Recycling of CO₂ and Small Organic Molecules

Lee

Kwon

Machunda

et al. 2009

Chemistry An Asian Journal

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As global warming directly affects the ecosystems and humankind in the 21st century, attention and efforts are continuously being made to reduce the emission of greenhouse gases, especially carbon dioxide (CO2). In addition, there have been numerous efforts to electrochemically convert CO2 gas to small organic molecules (SOMs) and vice versa. Herein, we highlight recent advances made in the electrocatalytic recycling of CO2 and SOMs including (i) the overall trend of research activities made in this area, (ii) the relations between reduction conditions and products in the aqueous phase, (iii) the challenges in the use of gas diffusion electrodes for the continuous gas phase CO2 reduction, as well as (iv) the development of state of the art hybrid techniques for industrial applications. Perspectives geared to fully exploit the potential of zero-gap cells for CO2 reduction in the gaseous phase and the high applicability on a large scale are also presented. We envision that the hybrid system for CO2 reduction supported by sustainable solar, wind, and geothermal energies and waste heat will provide a long term reduction of greenhouse gas emissions and will allow for continued use of the abundant fossil fuels by industries and/or power plants but with zero emissions.

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Section: Choice Of Catalysts and Desired Productsmentioning

confidence: 99%

Electrocatalytic Recycling of CO₂ and Small Organic Molecules

Lee

Kwon

Machunda

et al. 2009

Chemistry An Asian Journal

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“…However, the yield of product formic acid was relatively low, even with the addition of a nickel catalyst, and the highest formic acid yield on a carbon basis was approximately 16%. − Mn, as a first-row transition metal, has an extraordinarily appealing coordination chemistry because of its reactive redox nature . As a key element in photosynthesis, Mn can mediate the splitting of water to provide the necessary electrons for photosynthesis. − In addition, Mn plays a significant role in the synthesis of catalysts for CO 2 hydrogenation and Fischer–Tropsch (FT) synthesis . Moreover, many researchers have reported a redox process of ZnO/Zn, Mn(III)/Mn(II), and Mn(IV)/Mn(II) reactions using solar energy. , Recently, Uchida et al have also demonstrated that MgO/Mg can be circulated by solar power concentration using laser technology .…”

Section: Introductionmentioning

confidence: 99%

No Catalyst Addition and Highly Efficient Dissociation of H₂O for the Reduction of CO₂ to Formic Acid with Mn

Lyu

Yun

et al. 2014

Environ. Sci. Technol.

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The "greenhouse effect" caused by the increasing atmospheric CO2 level is becoming extremely serious, and thus, the reduction of CO2 emissions has become an extensive, urgent, and long-term task. The dissociation of water for CO2 reduction with solar energy is regarded as one of the most promising methods for the sustainable development of the environment and energy. However, a high solar-to-fuel efficiency keeps a great challenge. In this work, the first observation of a highly effective, highly selective, and robust system of dissociating water for the reduction of carbon dioxide (CO2) into formic acid with metallic manganese (Mn) is reported. A considerably high formic acid yield of more than 75% on a carbon basis from NaHCO3 was achieved with 98% selectivity in the presence of simple commercially available Mn powder without the addition of any catalyst, and the proposed process is exothermic. Thus, this study may provide a promising method for the highly efficient dissociation of water for CO2 reduction by combining solar-driven thermochemistry with the reduction of MnO into Mn.

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“…Mn, a first-row transition metal, has special coordination chemistry due to its reactive redox nature. Mn can mediate the H 2 O dissociation to provide the necessary electrons for photosynthesis [ 36 , 37 ]. Besides, Mn plays an important role in the CO 2 hydrogenation and Fischer−Tropsch synthesis [ 38 ].…”

Section: Experimental Studies Of Co 2 Reduction To...mentioning

confidence: 99%

Hydrothermal Reduction of CO2 to Value-Added Products by In Situ Generated Metal Hydrides

2023

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An integrated process by coupling hydrothermal reactions, including CO2 reduction and H2O dissociation with metals, is proposed. The hydrogen could be rapidly produced under hydrothermal conditions, owing to the special characteristics of high temperature water, generating metal hydrides as intermediates. Hydrogen production from the H2O dissociation under hydrothermal conditions is one of the most ideal processes due to its environmentally friendly impact. Recent experimental and theoretical studies on the hydrothermal reduction of CO2 to value-added products by in situ generated metal hydrides are introduced, including the production of formic acid, methanol, methane, and long-chain hydrocarbons. These results indicate that this process holds promise in respect to the conversion of CO2 to useful chemicals and fuels, and for hydrogen storage, which could help alleviate the problems of climate change and energy shortage.

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Solar pyrometallurgy—An historic review

Cited by 9 publications

References 15 publications

Electrocatalytic Recycling of CO₂ and Small Organic Molecules

Electrocatalytic Recycling of CO₂ and Small Organic Molecules

No Catalyst Addition and Highly Efficient Dissociation of H₂O for the Reduction of CO₂ to Formic Acid with Mn

Hydrothermal Reduction of CO2 to Value-Added Products by In Situ Generated Metal Hydrides

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Solar pyrometallurgy—An historic review

Cited by 9 publications

References 15 publications

Electrocatalytic Recycling of CO2 and Small Organic Molecules

Electrocatalytic Recycling of CO2 and Small Organic Molecules

No Catalyst Addition and Highly Efficient Dissociation of H2O for the Reduction of CO2 to Formic Acid with Mn

Hydrothermal Reduction of CO2 to Value-Added Products by In Situ Generated Metal Hydrides

Contact Info

Product

Resources

About

Electrocatalytic Recycling of CO₂ and Small Organic Molecules

Electrocatalytic Recycling of CO₂ and Small Organic Molecules

No Catalyst Addition and Highly Efficient Dissociation of H₂O for the Reduction of CO₂ to Formic Acid with Mn