Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Ultrahigh Electrocatalytic Activity with Trace Amount Platinum Loadings on Free-standing Mesoporous Titanium Nitride Nanotube Arrays for Hydrogen Evolution Reaction

Abstract

Minimizing Pt loadings on electrocatalysts for hydrogen evolution reaction (HER) is essential for its commercial applications. Herein, free-standing mesoporous titanium nitride nanotube arrays (TiN NTAs) were fabricated to serve as the substrate for trace Pt loading. The uniform TiN NTAs show inner diameter of ~80 nm and length of ~7 μm, with many mesoporous holes in diameters ranging from 5 to 10 nm on the nanotube walls. Pt species dissolved from the Pt counter electrode in electrochemical cycling were redeposited on the mesoporous TiN NTAs to produce the Pt-TiN NTAs with an ultra-low Pt loading of 8.3 μg cm-2. The Pt-TiN NTAs exhibit 15-fold higher mass activity towards HER than the benchmark 20 wt% Pt/C in acidic media, with an overpotential of 71 mV vs. RHE at a current density of 10 mA cm-2, a Tafel slope value of 46.4 mV dec−1 and excellent stability. The performance of Pt-TiN NTAs is also much better than that of Pt species deposited on the independent nanotube arrays, due to the shortcuts originated from the mesoporous holes on the nanotube walls for electron and mass transfer.

Back to tab navigation

Supplementary files

Article information


Submitted
16 Feb 2020
Accepted
24 Jun 2020
First published
24 Jun 2020

Nanoscale, 2020, Accepted Manuscript
Article type
Paper

Ultrahigh Electrocatalytic Activity with Trace Amount Platinum Loadings on Free-standing Mesoporous Titanium Nitride Nanotube Arrays for Hydrogen Evolution Reaction

J. Zhao, Y. Zen, J. Wang, Q. Xu, R. Chen, H. Ni and G. J. Cheng, Nanoscale, 2020, Accepted Manuscript , DOI: 10.1039/D0NR01316A

Social activity

Search articles by author

Spotlight

Advertisements