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Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO 2 Nanocubes onto Carbon Supports
Author(s) -
Antoniassi Rodolfo M.,
Quiroz Jhon,
Barbosa Eduardo C. M.,
Parreira Luanna S.,
Isidoro Roberta A.,
Spinacé Estevam V.,
Silva Julio C. M.,
Camargo Pedro. H. C.
Publication year - 2021
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202002066
Subject(s) - bifunctional , ethylene glycol , catalysis , materials science , carbon monoxide , methanol , anode , carbon fibers , chemical engineering , electrochemistry , electrocatalyst , platinum , nanotechnology , inorganic chemistry , chemistry , electrode , organic chemistry , composite number , engineering , composite material
Designing efficient anode CO‐tolerant electrocatalysts is critical in low‐temperature fuel cell catalysts fueled either by H 2 /CO or alcohol. We demonstrate that the incorporation of TiO 2 nanocubes (TiO 2 NCs) on Carbon Vulcan supports, followed by the synthesis of Pt NPs at their surface (Pt/TiO 2 NCs‐C material), led to improvements in performance towards the electrooxidation of carbon monoxide, ethanol, methanol, ethylene glycol, and glycerol in acidic media relative to the commercial Pt/C and Pt/TiO 2 ‐C counterparts employing commercial TiO 2 . The nanocubes enabled changes in the electronic properties of Pt NPs while contributing to the bifunctional mechanism as compared to Pt/C and Pt/TiO 2 ‐C with commercial TiO 2 . Fuel cell experiments fed with H 2 /CO steam showed that Pt/TiO 2 NCs‐C employing nanocubes was resistant to CO‐poisoning, yielding superior performance in operational conditions. The results reported herein have important implications for developing electrocatalysts with superior performances in PEMFCs.