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Efficient Dual-Site Carbon Monoxide Electro-Catalysts via Interfacial Nano-Engineering

Undergraduate #181
Discipline: Chemistry and Chemical Sciences
Subcategory: Chemistry (not Biochemistry)

D'Lauren Falkner - Xavier University of Louisiana
Co-Author(s): Zhen Liu, Xavier University of Louisiana, New Orleans, LA; Zhongyuan Huang, Xavier University of Louisiana, New Orleans, LA; Feifei Cheng, Xavier University of Louisiana, New Orleans, LA; Zhanhu Guo, Xavier University of Louisiana, New Orleans, LA; Guangdi Wang, Xavier University of Louisiana, New Orleans, LA; Xu Chen,Xavier University of Louisiana, New Orleans, LA; Zhe Wang, Xavier University of Louisiana, New Orleans, LA



Durable, highly efficient, and economic sound electrocatalysts for CO electrooxidation (COE) are the emerging key for wide variety of energy solutions, especially fuel cells and rechargeable metal?air batteries. Herein, we report the novel system of nickel aluminum double layered hydroxide (NiAl- LDH) nanoplates on carbon nanotubes (CNTs) network. The formulation of such complexes system was to be induced through the assistance of gold nanoparticles in order to form dual-metal active sites so as to create a extended Au/NiO two phase zone. Bis (tri uoromethylsulfonyl)imide (NTf2) anion of ionic liquid electrolyte was selected to enhance the CO/O2 adsorption and to facilitate electro- catalyzed oxidation of Ni (OH)2 to NiOOH by increasing the electrophilicity of catalytic interface. The resulting neutral catalytic system exhibited ultra-high electrocatalytic activity and stability for CO electrooxidation than commercial and other reported precious metal catalysts. The turnover frequency (TOF) of the LDH-Au/CNTs COE catalyst was much higher than the previous reported other similar electrocatalysts, even close to the activity of solid-gas chemical catalysts at high temperature. Moreover, in the long-term durability testing, the negligible variation of current density remains exsisting after 1000 electrochemistry cycles.

Not Submitted

Funder Acknowledgement(s): NSF (HRD 1700429)

Faculty Advisor: Dr. Zhe Wang, zwang@xula.edu

Role: Testing of the measurements

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This material is based upon work supported by the National Science Foundation (NSF) under Grant No. DUE-1930047. Any opinions, findings, interpretations, conclusions or recommendations expressed in this material are those of its authors and do not represent the views of the AAAS Board of Directors, the Council of AAAS, AAAS’ membership or the National Science Foundation.

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