Affiliation:
1. Department of Chemistry, Bar Ilan Institute of Nanotechnology and Advanced Materials (BINA) Bar Ilan University Ramat Gan Israel
2. Department of Chemistry, Molecular Science Research Hub, Imperial College London London UK
Abstract
AbstractUtilizing supported single atoms as catalysts presents an opportunity to reduce the usage of critical raw materials such as platinum, which are essential for electrochemical reactions such as hydrogen oxidation reaction (HOR). Herein, we describe the synthesis of a Pt single electrocatalyst inside single‐walled carbon nanotubes (SWCNTs) via a redox reaction. Characterizations via electron microscopy, X‐ray photoelectron microscopy, and X‐ray absorption spectroscopy show the single‐atom nature of the Pt. The electrochemical behavior of the sample to hydrogen and oxygen was investigated using the advanced floating electrode technique, which minimizes mass transport limitations and gives a thorough insight into the activity of the electrocatalyst. The single‐atom samples showed higher HOR activity than state‐of‐the‐art 30% Pt/C while almost no oxygen reduction reaction activity in the proton exchange membrane fuel cell operating range. The selective activity toward HOR arose as the main fingerprint of the catalyst confinement in the SWCNTs.
Subject
Materials Chemistry,Energy (miscellaneous),Materials Science (miscellaneous),Renewable Energy, Sustainability and the Environment
Cited by
11 articles.
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