Autonomous Electrochemical System for Ammonia Oxidation Reaction Measurements at the International Space Station
| Autor: | Camila Morales-Navas, Roberto A. Martínez-Rodríguez, Francisco J. Vidal-Iglesias, Armando Peña, Joesene J. Soto-Pérez, Pedro Trinidad, José Solla-Gullón, Toshko Tzvetkov, Jonathan Doan, Eugene S. Smotkin, Eduardo Nicolau, Juan M. Feliu, Carlos R. Cabrera |
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| Přispěvatelé: | Universidad de Alicante. Departamento de Química Física, Universidad de Alicante. Instituto Universitario de Electroquímica, Electroquímica Aplicada y Electrocatálisis, Electroquímica de Superficies |
| Rok vydání: | 2022 |
| Předmět: |
Physics and Astronomy (miscellaneous)
Space and Planetary Science Autonomous electrochemical system Materials Science (miscellaneous) Ammonia oxidation reaction Medicine (miscellaneous) Microgravity Agricultural and Biological Sciences (miscellaneous) Biochemistry Genetics and Molecular Biology (miscellaneous) International Space Station |
| DOI: | 10.21203/rs.3.rs-1638507/v1 |
| Popis: | An autonomous electrochemical system prototype for ammonia oxidation reaction (AOR) measurements was efficiently done inside a 4'' x 4'' x 8'' 2U Nanoracks module at the International Space Station (ISS). This device, the Ammonia Electrooxidation Lab at the ISS (AELISS), included an autonomous electrochemical system that complied with NASA ISS nondisclosure agreements, power, safety, security, size constrain, and material compatibility established for space missions. The integrated autonomous electrochemical system was tested on-ground and deployed to the International Space Station as a “proof-of-concept” ammonia oxidation reaction testing space device. Here are discussed the results of cyclic voltammetry and chronoamperometry measurements done at the ISS with a commercially available channel flow-cell with eight screen-printed electrodes, including Ag quasi-reference (Ag QRE) and carbon counter electrodes. Pt nanocubes in Carbon Vulcan XC-72R were used as the catalyst for the AOR and 2 μL drop of Pt nanocubes/ Carbon Vulcan XC-72R, 20 wt%, ink was placed on the carbon working electrodes and allowed to dry in air. After the AELISS was prepared for launch to the ISS, a 4 days delayed (2 days in the space vehicle Antares and 2 days space transit to the ISS) cause a slight shift on the Ag QRE potential. Nevertheless, the AOR cyclic voltametric peak was observed in the ISS and showed ca. 70% current density decrease due to the buoyancy effect in agreement with previous microgravity experiments done at the zero-g aircraft. This work was supported by the Puerto Rico NASA Space Grant Consortium, funded through the NASA Cooperative Agreement Grant Number 80NSSC20M0052, NASA-EPSCoR-International Space Station (ISS) Flight Opportunity Grant Number NNH14ZHA002C, NASA-RID Grant Number 80NSSC19M0049, and the National Science Foundation (NSF) CREST Center for Innovation Research and Education in Environmental Nanotechnology Grant Number 1736093. C.R.C acknowledges the STARs Award (2021) of the University of Texas System. |
| Databáze: | OpenAIRE |
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