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Comptes Rendus Chimie
Sous presse. Epreuves corrigées par l'auteur. Disponible en ligne depuis le samedi 31 août 2019
Doi : 10.1016/j.crci.2019.07.006
Received : 28 May 2019 ;  accepted : 17 July 2019
Tungsten-doped titanium-dioxide-supported low-Pt-loading electrocatalysts for the oxidation reaction of ethanol in acidic fuel cells
 

Hau Quoc Pham a, Tai Thien Huynh a, b, Hoang Ngoc Bich c, Toan Minh Pham a, Son Truong Nguyen a, Le Trong Lu d, Van Thi Thanh Ho b,
a Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam 
b Hochiminh City University of Natural Resources and Environment (HCMUNRE), Viet Nam 
c Center of Excellence for Functional Polymers and NanoEngineering, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam 
d Institute for Tropical Technology, Vietnam Academy of Science and Technology, Ha Noi, Viet Nam 

Corresponding author.
Abstract

High cost and poor durability of Pt-based electrocatalysts are the main challenges for future commercialization of direct ethanol fuel cells (DEFCs). In the present work, a stable and effective Pt/Ti0.8 W0.2 O2 electrocatalyst toward ethanol electrooxidation reactions (EORs) was prepared by utilizing the attributes of noncarbon catalyst supports and low Pt loading. The 18.5 wt % Pt/Ti0.8 W0.2 O2 electrocatalyst was successfully fabricated through a simple and rapid microwave-assisted polyol route (ethylene glycol was used as a reducing agent). In comparison with a conventional 20 wt % Pt/C electrocatalyst, the as-prepared 18.5 wt % Pt/Ti0.8 W0.2 O2 electrocatalyst resulted in much lower onset potential, higher I f /I b value, and superior stability toward EOR, which can be ascribed to the synergistic effect between Pt nanocatalyst and the Ti0.8 W0.2 O2 catalyst support. Therefore, these findings imply that 18.5 wt % Pt/Ti0.8 W0.2 O2 is a promising anodic electrocatalyst and possesses the ability to replace Pt/C electrocatalysts in the future.

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Keywords : Direct ethanol fuel cells, Low Pt loading, Noncarbon materials, W-doped TiO2




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