School of Engineering Department of Chemical and Biological Engineering 85 Rational Design of Wearable Device for Stress Assessment via Perspiration Analysis Supervisor: NYEIN Hnin Yin Yin / CBE Student: TRAN Minh Tri / CENG Course: UROP 1000, Summer This report outlines the development of an enzymatic electrochemical biosensor designed for non-invasive glucose monitoring via saliva, offering a potential alternative to invasive blood sampling in diabetes management. The sensor uses glucose oxidase (GOx) immobilized on a Prussian Blue (PB)/nickel hexacyanoferrate (NiHCF)-modified gold electrode to detect glucose via its oxidation reaction. Fabrication involved electrodepositing Au nanodendrites, PB, and NiHCF layers, followed by drop-casting a GOx-BSAglutaraldehyde membrane. Testing across physiologically relevant salivary glucose concentrations (0.25–2.0 mM) demonstrated a linear current response to glucose concentration, validating the sensor’s functionality. However, progressive signal decay over time was observed, consistent with enzymatic degradation. The findings show that the sensor can effectively detect glucose concentration range, commonly found in saliva, but the storage stability remains a challenge. Advanced Catalysts for Water Splitting and Hydrogen Production Supervisor: SHAO Minhua / CBE Student: CHO Sungbin / CEEV Course: UROP 1100, Spring This study investigates the catalytic performance of non-noble metal catalysts in the dehydrogenation of decalin, a promising liquid organic hydrogen carrier (LOHC). Catalysts containing nickel and cobalt supported on carbon black or silicon dioxide were synthesized and tested. Despite previous successes with similar reactions, none of the catalysts facilitated the conversion of decalin to naphthalene, as confirmed by gas chromatography and mass spectrometry analyses. The results suggest that catalytic activities are highly specific to their intended reactions and that the synthesis method may have affected metal loading and activity. Future research can explore alternative synthesis methods using different non-noble metals and supports to improve hydrogen storage systems. Anode Materials for Lithium Ion Batteries Supervisor: SHAO Minhua / CBE Student: ZHU Yihan / CHEM Course: UROP 1100, Spring UROP 2100, Summer To decrease the reliance on fossil fuels, hydrogen fuel cells present a viable alternative. Hydrogen fuel cells need catalysts for both the oxidation of hydrogen and the reduction of oxygen. In this project, catalyst Ru/FeNC and Ru/NC will be prepared and compared the effectiveness with the provided catalyst Pt/C to determine which one has a better efficiency in the hydrogen oxidation reaction. The data collected from cyclic-voltammetry is used to draw the Current Density against Potential graphs for comparison. As a result, the catalyst Pt/C has better performance in hydrogen oxidation reactions than the other two Ru-based catalysts.
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