Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 318, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121808
Keywords
Pt; SMSI; High-current-density; Seawater; Hydrogen evolution
Funding
- National Natural Science Foundation of China [51772162, 22001143, 52072197]
- Youth Innovation and Technology Foundation of Shandong Higher Education Institutions, China [2019KJC004]
- Outstanding Youth Foundation of Shandong Province, China [ZR2019JQ14]
- Taishan Scholar Young Talent Program [tsqn201909114, tsqn201909123]
- Natural Science Foundation of Shandong Province [ZR2020YQ34, ZR2020ZD09]
- Major Scientific and Technological Innovation Project [2019JZZY020405]
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In this study, a novel strategy for constructing stable electrocatalysts for high-current-density neutral seawater hydrogen evolution was developed through strong metal-support interaction (SMSI) and incorporation of Pt. The optimized PtNb-Nb2O5@CC exhibited excellent electrochemical performance and durability, and opened up new opportunities for further exploration of SMSI and Pt incorporation in catalytic applications.
Powerful, efficient, and corrosion-resistant electrocatalysts are in need to achieve high-current-density neutral seawater hydrogen evolution. Here, a novel strategy through strong metal-support interaction (SMSI) and incorporation of Pt to construct PtNb-Nb2O5 clusters @C was developed with stable high-current-density neutral seawater hydrogen evolution property for the first time. SMSI prevents agglomeration and corrosion of nano-materials. Pt sites were proposed to play an anabranch role by binding H* to stabilize the Nb valence state and prevent water dissociation incapacitation. The optimized PtNb-Nb2O5 @CC delivers low overpotentials of 440 mV (500 mA cm(-2)) and 570 mV (1000 mA cm(-2)) in neutral seawater and has 360 h excellent durability at 500 mA cm(-2). In-situ Fourier transform infrared spectroscopy (FTIR), in-situ Raman spectroscopies and theoretical calculations supported the hydrogen evolution reaction (HER) mechanism. PtNb-Nb2O5 heterogeneous interface provided more active sites for water dissociation. OH* adsorbed on Nb sites in stable Nb2O5, and H* adsorbed on Nb sites and desorbed as H-2 on Pt sites in stable PtNb. Overall, this work not only first achieves stable high-current-density neutral seawater hydrogen evolution property, but also opens a new opportunity to explore SMSI and incorporation of Pt to prevent agglomeration, corrosion, and water dissociation incapacitation for catalytic applications under high current densities.
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