Pt–Ni octahedral nanocrystals as a class of highly active electrocatalysts toward the hydrogen evolution reaction in an alkaline electrolyte

Reza Kavian; Sang-Il Choi; Jinho Park; Tianyuan Liu; Hsin-Chieh Peng; Ning Lu; Jinguo Wang; Moon J. Kim; Younan Xia; Seung Woo Lee

doi:10.1039/C6TA05411K

Pt–Ni octahedral nanocrystals as a class of highly active electrocatalysts toward the hydrogen evolution reaction in an alkaline electrolyte†

Reza Kavian,‡^a Sang-Il Choi,§‡^b Jinho Park,^c Tianyuan Liu,^a Hsin-Chieh Peng,^b Ning Lu,^d Jinguo Wang,^d Moon J. Kim,^d Younan Xia*^bc and Seung Woo Lee

*^a

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* Corresponding authors

^a The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
E-mail: seung.lee@me.gatech.edu

^b The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA
E-mail: younan.xia@bme.gatech.edu

^c School of Chemistry and Biochemistry, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

^d Department of Materials Science and Engineering, University of Texas at Dallas, Richardson, Texas 75080, USA

Abstract

We have synthesized Pt–Ni octahedral nanocrystals with Ni(OH)₂ naturally formed on their surfaces as a promising catalyst for the hydrogen evolution reaction (HER) in an alkaline solution. For Pt–Ni octahedra of 9 nm in size, they exhibited specific and mass HER activities 15 times and 4.6 times greater than those of a commercial Pt/C catalyst in 0.1 M KOH solution.

Journal of Materials Chemistry A

Pt–Ni octahedral nanocrystals as a class of highly active electrocatalysts toward the hydrogen evolution reaction in an alkaline electrolyte†

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Pt–Ni octahedral nanocrystals as a class of highly active electrocatalysts toward the hydrogen evolution reaction in an alkaline electrolyte

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