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Three-Dimensional Boron- and Nitrogen-Codoped Graphene Aerogel-Supported Pt Nanoparticles as Highly Active Electrocatalysts for Methanol Oxidation Reaction
journal contribution
posted on 2018-04-04, 00:00 authored by Miaomiao Li, Quanguo Jiang, Minmin Yan, Yujie Wei, Jianbo Zong, Jianfeng Zhang, Yuping Wu, Huajie HuangAlthough direct methanol
fuel cells have long been regarded as
promising “green” power generators for portable electronics,
their further development has been largely hampered by the high cost
as well as the insufficient activity of the current Pt-based anode
catalysts. Herein, we present a bottom-up approach to the large-scale
fabrication of three-dimensional (3D) hybrid materials made from ultrafine
Pt nanoparticles as well as B- and N-codoped graphene aerogel (BN-GA).
The resulting Pt/BN-GA catalyst possesses 3D cross-linked porous networks,
large specific surface areas, numerous B and N active sites, homogeneous
Pt dispersion, and good electrical conductivity, which are all desirable
for the anode catalytic system in direct methanol fuel cells. As a
consequence, outstanding electrochemical properties in terms of high
catalytic activity, reliable long-term durability, and strong antitoxic
ability are achieved for the Pt/BN-GA catalyst, significantly superior
to those for the conventional Pt/carbon black, Pt/graphene, and Pt/graphene
aerogel catalysts. Density functional theory (DFT) calculations further
reveal that the dramatically enhanced catalytic performance is attributed
to the strong interaction between Pt and the BN-GA support, which
generates remarkable synergetic coupling effects that enable rapid
kinetics for the methanol oxidation reaction.
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methanol oxidation reactionelectrochemical propertiessurface areasNitrogen-Codoped Graphene Aerogel-Supported Pt Nanoparticlesbottom-up approachPt-based anode catalystsActive ElectrocatalystsDFTmethanol fuel cellsThree-Dimensional BoronN-codoped graphene aerogelBN-GA supportMethanol Oxidation ReactionPt dispersionultrafine Pt nanoparticles3 D cross-linkedantitoxic ability
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