Reply to the ‘Comment on “Nickel nanoparticles catalyse reversible hydration of carbon dioxide for mineralization carbon capture and storage”’ by D. Britt, Catal. Sci. Technol., 2013, 3, DOI: 10.1039/C3CY00142C

Bhaduri, Gaurav A.; Henderson, Richard A.; Šiller, Lidija

doi:10.1039/c3cy00357d

Cited by 7 publications

(7 citation statements)

References 17 publications

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“…The pH profiles show a more rapid change in pH in the presence of the NiNPs than in their absence. The results observed in this study are similar to those observed previously . It is also of note that the rate of change of pH of the uncatalysed sample is lower under solar radiation, for reasons discussed below.…”

Section: Resultssupporting

confidence: 91%

“…In the presence of NiNPs the reaction was faster and was limited by the rate of dissolution of CO 2 . Bhaduri et al . explained that the autocatalytic hydration in the absence of NiNPs is due to the H + ions generated by the dissociation of carbonic acid.…”

Section: Resultsmentioning

confidence: 99%

“…Catalytic activity was qualitatively shown by comparison of pH change profiles observed when CO 2 is bubbled through deionised (DI) water or through a suspension of NiNPs. They also observed that CO 2 hydration in DI water is an autocatalytic process catalysed by the H + ions generated by the dissociation of carbonic acid . The activity of NiNPs as a heterogeneous catalyst was also recently confirmed using DFT, showing that such biomimetic catalysts provide a robust substitute to CA .…”

Section: Introductionmentioning

confidence: 88%

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Photochemical Enhancement in Catalytic Activity of Nickel Nanoparticles for Hydration of CO₂

et al. 2016

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The aqueous route for mineralization of CO 2 is considered one of the least energy consuming processes for carbon capture and storage. Reversible hydration of CO 2 is one of the slowest steps in the mineralization process, however, it can be enhanced using nickel nanoparticles (NiNPs). In this study we evaluate the influence of photochemical effects on the catalytic activity of NiNPs for hydration of CO 2 by comparing pH change profiles of catalysed and uncatalysed reactions under different solar irradiation conditions. The activity of NiNPs for CO 2 hydration is observed under artificial solar radiation, with and without an infrared (IR) filter and in dark conditions. It is found that the rate of CO 2 hydration is enhanced by~16 % in the presence of IR-filtered solar radiation and by~24 % with the presence of IR radiation. The enhancement of activity is attributed to absorption associated with the NiNP surface plasmon resonance at 400 nm.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 88%

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Photochemical Enhancement in Catalytic Activity of Nickel Nanoparticles for Hydration of CO₂

et al. 2016

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“…The study by Bhaduri and Šiller caught the attention of investigators worldwide, as can be appreciated by the comments and rebuttals of their work. , Although their study provided a phenomenal leap forward in the development of truly heterogeneous catalysts, disputes regarding the kinetics and mechanism of the reaction remain, primarily because of the complexity of the experimental procedures inherent in dealing with the system under concern.…”

Section: Introductionmentioning

confidence: 99%

Computational Insights into the Activity of Transition Metals for Biomimetic CO₂ Hydration

2016

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Density functional theory (DFT) calculations were carried out on five transition metals (Co, Ni, Pd, Rh, Ru) to test their activities toward the biomimetic carbon dioxide hydration reaction. Periodic plane-wave calculations demonstrated the formation of surface species in accordance with the mechanism of the reaction known for α-carbonic anhydrase action. To determine different activation barriers for the different elementary steps involved in the reaction, DFT calculations using a cluster model of transition metals with Gaussian-type orbitals were carried out. The periodic and cluster calculations were found to correspond to a mechanism of the reaction constitituting seven steps, namely, surface adsorption of H2O, deprotonation and surface OH formation, adsorption of CO2, OH attack on adsorbed CO2, proton transfer, H2O attack on surface HCO3 – complex, and HCO3 – displacement by H2O. The behaviors of the metals were found to be different in a vacuum and in the solvated state, with Co being the best potential candidate for the biomimetic CO2 hydration reaction in a vacuum and Ru being the best candidate for the reaction in solution.

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“…The pH of the NiNP solution remains lower for the 22-minute duration of the experiment, though the difference between the curves decreases over time. Bhaduri et al [ 16 ] observed that in equilibrium studies the reaction rate of the reaction between carbonic acid and sodium carbonate is not catalysed by NiNP, but when the same reaction is done in a nonequilibrium system (e.g., with alkaline pH due to 0.1 M sodium carbonate addition) the enhancement in rate is obtained. This may explain the diminishing effect of NiNP over time as the solution equilibrates.…”

Section: Resultsmentioning

confidence: 99%

Impacts of Nickel Nanoparticles on Mineral Carbonation

Bodor

Chiang

Vlad

et al. 2014

The Scientific World Journal

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This work presents experimental results regarding the use of pure nickel nanoparticles (NiNP) as a mineral carbonation additive. The aim was to confirm if the catalytic effect of NiNP, which has been reported to increase the dissolution of CO2 and the dissociation of carbonic acid in water, is capable of accelerating mineral carbonation processes. The impacts of NiNP on the CO2 mineralization by four alkaline materials (pure CaO and MgO, and AOD and CC steelmaking slags), on the product mineralogy, on the particle size distribution, and on the morphology of resulting materials were investigated. NiNP-containing solution was found to reach more acidic pH values upon CO2 bubbling, confirming a higher quantity of bicarbonate ions. This effect resulted in acceleration of mineral carbonation in the first fifteen minutes of reaction time when NiNP was present. After this initial stage, however, no benefit of NiNP addition was seen, resulting in very similar carbonation extents after one hour of reaction time. It was also found that increasing solids content decreased the benefit of NiNP, even in the early stages. These results suggest that NiNP has little contribution to mineral carbonation processes when the dissolution of alkaline earth metals is rate limiting.

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Reply to the ‘Comment on “Nickel nanoparticles catalyse reversible hydration of carbon dioxide for mineralization carbon capture and storage”’ by D. Britt, Catal. Sci. Technol., 2013, 3, DOI: 10.1039/C3CY00142C

Abstract: Reply to the 'Comment on ''Nickel nanoparticles reversible hydration of carbon dioxide for mineralization carbon capture and storage''' by D.

Cited by 7 publications

References 17 publications

Photochemical Enhancement in Catalytic Activity of Nickel Nanoparticles for Hydration of CO₂

Photochemical Enhancement in Catalytic Activity of Nickel Nanoparticles for Hydration of CO₂

Computational Insights into the Activity of Transition Metals for Biomimetic CO₂ Hydration

Impacts of Nickel Nanoparticles on Mineral Carbonation

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Reply to the ‘Comment on “Nickel nanoparticles catalyse reversible hydration of carbon dioxide for mineralization carbon capture and storage”’ by D. Britt, Catal. Sci. Technol., 2013, 3, DOI: 10.1039/C3CY00142C

Abstract: Reply to the 'Comment on ''Nickel nanoparticles reversible hydration of carbon dioxide for mineralization carbon capture and storage''' by D.

Cited by 7 publications

References 17 publications

Photochemical Enhancement in Catalytic Activity of Nickel Nanoparticles for Hydration of CO2

Photochemical Enhancement in Catalytic Activity of Nickel Nanoparticles for Hydration of CO2

Computational Insights into the Activity of Transition Metals for Biomimetic CO2 Hydration

Impacts of Nickel Nanoparticles on Mineral Carbonation

Contact Info

Product

Resources

About

Photochemical Enhancement in Catalytic Activity of Nickel Nanoparticles for Hydration of CO₂

Photochemical Enhancement in Catalytic Activity of Nickel Nanoparticles for Hydration of CO₂

Computational Insights into the Activity of Transition Metals for Biomimetic CO₂ Hydration