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Plasma Synthesized Trilayered Rhodium−Platinum−Tin Oxide Nanostructures with Enhanced Tolerance to CO Poisoning and High Electroactivity for Ethanol Oxidation
Author(s) -
Wang Haixia,
Sun Shuhui,
Mohamedi Mohamed
Publication year - 2021
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000949
Subject(s) - catalysis , rhodium , materials science , tin , chemical engineering , platinum , direct ethanol fuel cell , noble metal , anode , oxide , inorganic chemistry , nanotechnology , chemistry , proton exchange membrane fuel cell , metallurgy , organic chemistry , electrode , engineering
The future of fuel cells technology will require porous or very organized multicomponent catalytic layers that can be prepared by thin film growth methods. Reducing the cost of these energy systems will also necessitate that the catalytic layers be binderless and contain low amount of the noble catalyst until efficient non‐noble catalysts are discovered. To address these requirements, monolayered SnO 2 , Pt and Rh, bi‐layered Pt/SnO 2 and Rh/Pt and novel tri‐layered Rh (various thicknesses)/Pt/SnO 2 catalysts supported on carbon paper are synthesized at room temperature via pulsed laser deposition. The catalysts are evaluated for their catalytic performance for the ethanol oxidation reaction (EOR), durability, and tolerance to CO‐poisoning. All the Rh/Pt/SnO 2 catalysts produce high CO‐tolerance, high EOR catalytic activity and durability as compared to pure Pt. The possible mechanism by which SnO 2 and Rh atoms enhanced the performance is also considered herein, and an optimal Rh/Pt/SnO 2 structure having a 10 nm thickness of Rh layer offers a promising anode catalyst for ethanol fuel cells. Notably, the onset potential for CO oxidation is extraordinarily 430 mV lower than on Pt, and the mass activity for EOR and durability are 2.25 and 4.2 times higher than on Pt.