Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 44, Pages 13694-13698Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201706921
Keywords
electrode materials; hydrogen evolution reaction; platinum; potential cycling; single-atom catalysis
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Funding
- National Natural Science Foundation of China [21601136, 51572016]
- National Program for Thousand Young Talents of China
- Tianjin Municipal Education Commission
- Tianjin Municipal Science and Technology Commission [15JCYBJC52600]
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Single-atom catalysts (SACs) have exhibited high activities for the hydrogen evolution reaction (HER) electrocatalysis in acidic or alkaline media, when they are used with binders on cathodes. However, to date, no SACs have been reported for the HER electrocatalysis in neutral media. We demonstrate a potential-cycling method to synthesize a catalyst comprising single Pt atoms on CoP-based nanotube arrays supported bya Ni foam, termed PtSA-NT-NF. This binder-free catalyst is centimeter-scale and scalable. It is directly used as HER cathodes, whose performances at low and high current densities in phosphate buffer solutions (pH 7.2) are comparable to and better than, respectively, those of commercial Pt/C. The Pt mass activity of PtSA-NT-NF is 4 times of that of Pt/C, and its electrocatalytic stability is also better than that of Pt/C. This work provides a large-scale production strategy for binder-free Pt SAC electrodes for efficient HER in neutral media.
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