Enhanced nitrate reduction over functionalized Pd/Cu electrode with tunable conversion to nitrogen and sodium hydroxide recovery

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Chen K., Ahmad M. S., Chen C.

SCIENCE OF THE TOTAL ENVIRONMENT, cilt.869, 2023 (SCI-Expanded, Scopus)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 869
• Basım Tarihi: 2023
• Doi Numarası: 10.1016/j.scitotenv.2023.161849
• Dergi Adı: SCIENCE OF THE TOTAL ENVIRONMENT
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Analytical Abstracts, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, Environment Index, Food Science & Technology Abstracts, Geobase, Greenfile, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
• Kocaeli Üniversitesi Adresli: Hayır

Özet

Development of heteroatomic electrocatalysts with a particular geometric structure for wastewater denitrification remains a formidable challenge. Herein, we reported the fabrication of a series of Pd\\Cu electrodes with Pd electro-deposition times varying from 60 s to 360 s. Physiochemical and electrochemical techniques were used to analyze the structure, morphology and activity of as prepared catalytic electrodes. XRD data revealed the formation of a Pd\\Cu alloy, while a reduced particle sizes (ca. 5.3 nm) and a uniform distribution of Pd over Cu was demonstrated by TEM. The XPS measurement indicated the presence of redox (Pd0 and Cu+2) states hence demonstrating the formation of a Pd\\Cu alloy. A nitrate removal efficiency of-98 %, N2 selectivity-86 % with an alkali recovery of 335 mM was obtained over Pd/Cu 180 s at 0.68 mA cm-2. Enhanced nitrate reducibility and extended durability reveal the viability of a novel electrocatalytic and electrodialysis system for degrading NO3- in water, as well as a system for efficiently recovering liquid alkali.