NDLI: Titanium Dioxide-Grafted Copper Complexes: High-Performance Electrocatalysts for the Oxygen Reduction Reaction in Alkaline Media

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Titanium Dioxide-Grafted Copper Complexes: High-Performance Electrocatalysts for the Oxygen Reduction Reaction in Alkaline Media

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Yu, Guo-qiang Wei, Ping-jie Wang, Fei-fei Liu, Jin-gang
Description	Author Affiliation: Wang FF ( Key Laboratory for Advanced Materials of MOE, Department of Chemistry, East China University of Science and Technology, Shanghai, 200237 (China).); Wei PJ ( Key Laboratory for Advanced Materials of MOE, Department of Chemistry, East China University of Science and Technology, Shanghai, 200237 (China).); Yu GQ ( Key Laboratory for Advanced Materials of MOE, Department of Chemistry, East China University of Science and Technology, Shanghai, 200237 (China).); Liu JG ( Key Laboratory for Advanced Materials of MOE, Department of Chemistry, East China University of Science and Technology, Shanghai, 200237 (China). liujingang@ecust.edu.cn.)
Abstract	The sluggish kinetics of the oxygen reduction reaction (ORR) at the cathodes of fuel cells significantly hampers fuel cell performance. Therefore, the development of high-performance, non-precious-metal catalysts as alternatives to noble metal Pt-based ORR electrocatalysts is highly desirable for the large-scale commercialization of fuel cells. $TiO_{2}-grafted$ copper complexes deposited on multiwalled carbon nanotubes (CNTs) form stable and efficient electrocatalysts for the ORR. The optimized catalyst composite $CNTs@TiO_{2}–ZA–[Cu(phen)(BTC)]$ shows surprisingly high selectivity for the $4 e^{−}$ reduction of $O_{2}$ to water (approximately 97 %) in alkaline solution with an onset potential of 0.988 V vs. RHE, and demonstrates superior stability and excellent tolerance for the methanol crossover effect in comparison to a commercial Pt/C catalyst. The copper complexes were grafted onto the surface of $TiO_{2}$ through coordination of an imidazole-containing ligand, zoledronic acid (ZA), which binds to $TiO_{2}$ through its bis-phosphoric acid anchoring group. Rational optimization of the copper catalyst’s ORR performance was achieved by using an electron-deficient ligand, 5-nitro-1,10-phenanthroline (phen), and bridging benzene-1,3,5-tricarboxylate (BTC). This facile approach to the assembly of copper catalysts on $TiO_{2}$ with rationally tuned ORR activity will have significant implications for the development of high-performance, non-precious-metal ORR catalysts.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	1
Volume Number	22
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2016-01-04
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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