Multicomponent electrocatalyst with ultralow Pt loading and high hydrogen evolution activity

Jitendra N. Tiwari, Siraj Sultan, Chang Woo Myung, Taeseung Yoon, Nannan Li, Miran Ha, Ahmad M. Harzandi, Hyo Ju Park, Dong Yeon Kim, S. Selva Chandrasekaran, Wang Geun Lee, Varun Vij, Hoju Kang, Tae Joo Shin, Hyeon Suk Shin, Geunsik Lee, Zonghoon Lee and Kwang S. Kim ()
Additional contact information
Jitendra N. Tiwari: Ulsan National Institute of Science and Technology (UNIST)
Siraj Sultan: Ulsan National Institute of Science and Technology (UNIST)
Chang Woo Myung: Ulsan National Institute of Science and Technology (UNIST)
Taeseung Yoon: Ulsan National Institute of Science and Technology (UNIST)
Nannan Li: Ulsan National Institute of Science and Technology (UNIST)
Miran Ha: Ulsan National Institute of Science and Technology (UNIST)
Ahmad M. Harzandi: Ulsan National Institute of Science and Technology (UNIST)
Hyo Ju Park: UNIST
Dong Yeon Kim: Ulsan National Institute of Science and Technology (UNIST)
S. Selva Chandrasekaran: Ulsan National Institute of Science and Technology (UNIST)
Wang Geun Lee: Ulsan National Institute of Science and Technology (UNIST)
Varun Vij: Ulsan National Institute of Science and Technology (UNIST)
Hoju Kang: UNIST Central Research Facilities, UNIST
Tae Joo Shin: UNIST Central Research Facilities, UNIST
Hyeon Suk Shin: UNIST
Geunsik Lee: UNIST
Zonghoon Lee: UNIST
Kwang S. Kim: Ulsan National Institute of Science and Technology (UNIST)

Nature Energy, 2018, vol. 3, issue 9, 773-782

Abstract: 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.

Date: 2018
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DOI: 10.1038/s41560-018-0209-x

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