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Issue 45, 2019
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Direct immobilization of an atomically dispersed Pt catalyst by suppressing heterogeneous nucleation at −40 °C

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Abstract

Direct deposition of isolated metal atoms onto substrates has been recognized as a simple route to obtain high performance supported atomically dispersed metals (SACs), however, the agglomeration driven by high surface energy is difficult to avoid. Herein, we demonstrate a one-pot solution synthesis to obtain atomically dispersed platinum (Pt) supported on nitrogen (N)-doped mesoporous carbon (NMC) substrates (Pt/NMC-LT) by conducting the whole synthesis at −40 °C, owing to the sluggish nucleation kinetics. We obtained the Pt/NMC-LT catalyst with superior electrochemical hydrogen evolution reaction (HER) activity and stability, in comparison with the NMC supported dominant Pt sub-nanometer cluster catalyst from solution synthesis at RT ∼ 25 °C (Pt/NMC-RT) and commercial carbon supported Pt nanoparticle catalysts (Pt/C). Lower over-potential values (only 17.0 and 49.8 mV) are needed for high HER current densities (10 and 100 mA cm−2, respectively), and no obvious degradation is observed after an accelerated durability test (ADT) for 5000 CV cycles.

Graphical abstract: Direct immobilization of an atomically dispersed Pt catalyst by suppressing heterogeneous nucleation at −40 °C

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Supplementary files

Article information


Submitted
11 Jul 2019
Accepted
08 Sep 2019
First published
09 Sep 2019

J. Mater. Chem. A, 2019,7, 25779-25784
Article type
Communication

Direct immobilization of an atomically dispersed Pt catalyst by suppressing heterogeneous nucleation at −40 °C

K. Huang, R. Wang, H. Wu, H. Wang, X. He, H. Wei, S. Wang, R. Zhang, M. Lei, W. Guo, B. Ge and H. Wu, J. Mater. Chem. A, 2019, 7, 25779
DOI: 10.1039/C9TA07469D

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