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Shin, Tae Joo
UNIST Central Research Facilities (UCRF)
Research Interests
  • Synchrotron Radiation Application Researches

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Multicomponent electrocatalyst with ultralow Pt loading and high hydrogen evolution activity

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Title
Multicomponent electrocatalyst with ultralow Pt loading and high hydrogen evolution activity
Author
Tiwari, Jitendra N.Sultan, SirajMyung, Chang WooYoon, TaeseungLi, NannanHa, MiranHarzandi, Ahmad M.Park, Hyo JuKim, Dong YeonChandrasekara, S. SelvaLee, Wang GeunVij, VarunKang, HojuShin, Tae JooShin, Hyeon SukLee, GeunsikLee, ZonghoonKim, Kwang S.
Issue Date
201809
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE ENERGY, v.3, no.9, pp.773 - 782
Abstract
Platinum is the most effective electrocatalyst for the hydrogen evolution reaction in acidic solutions, but its high cost limits its wide application. Therefore, it is desirable to design catalysts that only require minimal amounts of Pt to function, but that are still highly active. Here we report hydrogen production in acidic water using a multicomponent catalyst with an ultralow Pt loading (1.4 μg per electrode area (cm2)) supported on melamine-derived graphitic tubes (GTs) that encapsulate a FeCo alloy and have Cu deposited on the inside tube walls. With a 1/80th Pt loading of a commercial 20% Pt/C catalyst, in 0.5 M H2SO4 the catalyst achieves a current density of 10 mA cm−2 at an overpotential of 18 mV, and shows a turnover frequency of 7.22 s−1 (96 times higher than that of the Pt/C catalyst) and long-term durability (10,000 cycles). We propose that a synergistic effect between the Pt clusters and single Pt atoms embedded in the GTs enhances the catalytic activity.
URI
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DOI
http://dx.doi.org/10.1038/s41560-018-0209-x
ISSN
2058-7546
Appears in Collections:
SNS_Journal Papers
UCRF_Journal Papers
MSE_Journal Papers

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