Tuning Surface Lattice Strain toward a Pt-Skin CoPtx Truncated Octahedron for Hydrogen Evolution Reaction
Author(s)
Lin, Liu
Sun, Zemin
Yao, Huiying
Yuan, Mengwei
Yang, Han
Li, Huifeng
Zhang, Qinghua
Wang, Dawei
Gu, Lin
Sun, Genban
Zhu, Jia
Fang, Weihai
Tang, Zhiyong
Griffith University Author(s)
Year published
2019
Metadata
Show full item recordAbstract
Lattice strain plays a critical role in controlling catalytic performance. However, few experiments or theoretical works have been reported regarding the strain–activity relationship in the hydrogen evolution reaction (HER). Herein, we have prepared platinum–skin-truncated octahedra with the formula CoPtx. Among the prepared nanocatalysts of varied composition, the CoPt2 nanocatalyst exhibits an extremely small overpotential of 17 mV in acid solution at −10 mA cm–2, which is obviously superior to commercial Pt/C (30 mV). Furthermore, the overpotential of the CoPt2 nanocatalyst is only 20 mV in alkaline solution, which is ...
View more >Lattice strain plays a critical role in controlling catalytic performance. However, few experiments or theoretical works have been reported regarding the strain–activity relationship in the hydrogen evolution reaction (HER). Herein, we have prepared platinum–skin-truncated octahedra with the formula CoPtx. Among the prepared nanocatalysts of varied composition, the CoPt2 nanocatalyst exhibits an extremely small overpotential of 17 mV in acid solution at −10 mA cm–2, which is obviously superior to commercial Pt/C (30 mV). Furthermore, the overpotential of the CoPt2 nanocatalyst is only 20 mV in alkaline solution, which is about a third of that of commercial Pt/C (53 mV). The experiments and density functional theory calculations reveal a “volcano”-type relationship for the strain-HER catalytic activity relationship for the first time. The theoretical calculated “volcano” relationship gives a clearer scope of the best strain toward further investigation on higher HER activity.
View less >
View more >Lattice strain plays a critical role in controlling catalytic performance. However, few experiments or theoretical works have been reported regarding the strain–activity relationship in the hydrogen evolution reaction (HER). Herein, we have prepared platinum–skin-truncated octahedra with the formula CoPtx. Among the prepared nanocatalysts of varied composition, the CoPt2 nanocatalyst exhibits an extremely small overpotential of 17 mV in acid solution at −10 mA cm–2, which is obviously superior to commercial Pt/C (30 mV). Furthermore, the overpotential of the CoPt2 nanocatalyst is only 20 mV in alkaline solution, which is about a third of that of commercial Pt/C (53 mV). The experiments and density functional theory calculations reveal a “volcano”-type relationship for the strain-HER catalytic activity relationship for the first time. The theoretical calculated “volcano” relationship gives a clearer scope of the best strain toward further investigation on higher HER activity.
View less >
Journal Title
Journal of Physical Chemistry C
Volume
123
Issue
49
Subject
Chemical sciences
Engineering
Science & Technology
Physical Sciences
Chemistry, Physical
Nanoscience & Nanotechnology