Stalagmite Al(OH)3 growth on aluminum foil surface by catalytic CO2 reduction with H2O

Yoon, Hee Jung; Kim, Seog K.; Lee, Sung Woo; Sohn, Youngku

doi:10.1016/j.apsusc.2018.04.178

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…Al as a foil has been reported to be electrochemically inactive for carbon dioxide reduction (Lee, De Riccardis, Kazantsev, Cooper, Buckley, Burroughs et al, 2020). However, encouraged by an earlier report of the reduction of CO 2 to CO (Yoon, Kim, Lee & Sohn, 2018), the Al surface is activated in the present experiment by removal of its natural oxide layer with a solution of CuCl 2 produced in an electrochemical cell. CuCl 2 is known to etch Al 2 O 3 , and therefore the next step was to find a suitable home preparation for this chemical.…”

Section: Methodsmentioning

confidence: 66%

CO2 capture and conversion: A homemade experimental approach

Acuña-Girault

Campo-Rábago²,

Contreras-Ruiz³

et al. 2022

J. Technol. Sci. Educ.

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During the SARS-2-Covid pandemic our institution sought to continue the teaching and learning of experimental laboratories by designing, assembling, and delivering a microscale chemistry kit to the students´ homes. Thanks to this approach students were able to perform ~25 experiments during each one of the Fall 2020 and Spring 2021 semesters in an elective Electrochemistry and Corrosion course offered to Chemical Engineering undergraduates. In addition to performing traditional experiments, students were encouraged to design some of their own and have the entire group reproduce them. One of such student-designed experiments involved the capture of CO2 and its reduction with a readily available active metal (i.e., Al foil) in aqueous media to generate potentially useful products. The highly negative standard potential of Al is exploited for the reduction of lab-generated CO2, and the products are chemically tested. Al as a foil has been reported to be electrochemically inactive for carbon dioxide reduction. However, encouraged by an earlier report of the reduction of CO2 to CO, the Al surface is activated in the present experiment by removal of its natural oxide layer with a solution of CuCl2 produced in an electrochemical cell. This procedure enables Al to react with CO2 and yield useful chemistry. This experiment turned to be a discovery trip. The detailed procedure is discussed here, as well as the teaching methodology, grading scheme, and student outcomes.

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Section: Methodsmentioning

confidence: 66%

CO2 capture and conversion: A homemade experimental approach

Acuña-Girault

Campo-Rábago²,

Contreras-Ruiz³

et al. 2022

J. Technol. Sci. Educ.

View full text Add to dashboard Cite

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Section: Resultsmentioning

confidence: 99%

“…For the Al 2p XPS profiles (Supporting Information, Figure S5), a broad peak was commonly observed around 74.1 eV, attributed to Al of the Al 2 O 3 support [32,38]. An additional peak at 75.0 eV was observed and attributed to the Al of surface Al-OH species [32,38]. For the O 1s XPS profiles (Supporting Information, Figure S5), a broad peak was commonly observed around 530.9 eV due to lattice O of Al 2 O 3 support.…”

Section: Resultsmentioning

confidence: 99%

“…The generation of electrons was an important factor for the multielectron processes. The mechanisms for the productions of CO (in reaction ( 12)), CH 3 OH (in reaction ( 13)), and CH 4 (in reaction ( 14)) are written as below and shown in Figure 6 [38,39]. These reaction channels were closely spaced in free energy change, and, thus, the hydrogen production channel (H + + e − → 1/2H 2 , −0.42 V vs. SHE) occurred competitively.…”

Section: Resultsmentioning

confidence: 99%

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Thermal CO Oxidation and Photocatalytic CO2 Reduction over Bare and M-Al2O3 (M = Co, Ni, Cu, Rh, Pd, Ag, Ir, Pt, and Au) Cotton-Like Nanosheets

et al. 2021

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Aluminum oxide (Al2O3) has abundantly been used as a catalyst, and its catalytic activity has been tailored by loading transition metals. Herein, γ-Al2O3 nanosheets were prepared by the solvothermal method, and transition metals (M = Co, Ni, Cu, Rh, Pd, Ag, Ir, Pt, and Au) were loaded onto the nanosheets. Big data sets of thermal CO oxidation and photocatalytic CO2 reduction activities were fully examined for the transition metal-loaded Al2O3 nanosheets. Their physicochemical properties were examined by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction crystallography, and X-ray photoelectron spectroscopy. It was found that Rh, Pd, Ir, and Pt-loading showed a great enhancement in CO oxidation activity while other metals negated the activity of bare Al2O3 nanosheets. Rh-Al2O3 showed the lowest CO oxidation onset temperature of 172 °C, 201 °C lower than that of bare γ-Al2O3. CO2 reduction experiments were also performed to show that CO, CH3OH, and CH4 were common products. Ag-Al2O3 nanosheets showed the highest performances with yields of 237.3 ppm for CO, 36.3 ppm for CH3OH, and 30.9 ppm for CH4, 2.2×, 1.2×, and 1.6× enhancements, respectively, compared with those for bare Al2O3. Hydrogen production was found to be maximized to 20.7 ppm during CO2 reduction for Rh-loaded Al2O3. The present unique pre-screening test results provided very useful information for the selection of transition metals on Al2O3-based energy and environmental catalysts.

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