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Nano‐Platinum Catalysts Supported by Carbon Aerogel Microsphere with Adjustable Pore Size Tuned by PEG‐200 for Oxygen Reduction Reaction
Author(s) -
Zeng Min,
Wang ChaoYang,
Su Lei,
Luo ZhiHui,
Wu JianKun,
Yi Yong
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001936
Subject(s) - aerogel , catalysis , proton exchange membrane fuel cell , platinum , microporous material , mesoporous material , chemical engineering , electrocatalyst , electrochemistry , materials science , specific surface area , platinum nanoparticles , carbon fibers , template method pattern , chemistry , inorganic chemistry , nanotechnology , electrode , organic chemistry , composite material , composite number , engineering
Carbon‐supported nano‐platinum catalyst is extensively used as electrocatalyst in proton exchange membrane fuel cells (PEMFCs) due to its high catalytic activity towards the oxygen reduction reaction (ORR). phloroglucinol‐resorcinol‐formaldehyde carbon aerogel (CPRF) microsphere with adjustable pore sizes can be prepared by adding template, PEG‐200, on the basis of inverse micro emulsion method. Without cumbersome solvent exchange and supercritical drying, CPRF microspheres with a unique 3D structure can be obtained, which has a suitable microporous structure (10‐35 nm) and applicable mesoporous size (∼20 nm). As the support of the platinum, the CPRF microspheres with high specific surface area (798.3 m 2 g −1 ) show excellent catalytic activity for ORR in alkaline electrolytes. The initial electrochemical active surface area and mass activity of the prepared Pt/CPRF are 2.5 and 2.7 times higher than that of commercial Pt/C respectively. After the accelerated durability test (ADT), the Pt/CPRF still keeps a stable electrochemical active surface area and mass activity up to 56 m 2 g −1 and 0.11 A mg −1 , while the commercial Pt/C lost to 42.8 m 2 g −1 and 0.02 A mg −1 . The stability of the Pt/CPRF shows about 5.5 times enhancement for ORR compared to commercial Pt/C.