Enhanced methanol electrooxidation over defect-rich Pt-M (M = Fe, Co, Ni) ultrathin nanowires

Xiao Jing Liu; Yi Dan Sun; Xing Yin; Chun Jia; Meng Ma; Yuhui Chen

doi:10.1021/acs.energyfuels.0c01850

Enhanced methanol electrooxidation over defect-rich Pt-M (M = Fe, Co, Ni) ultrathin nanowires

Xiao Jing Liu, Yi Dan Sun, Xing Yin, Chun Jia, Meng Ma, Yuhui Chen

School of energy science and engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

How to improve the intrinsic activity of the Pt catalysts is still a pivotal issue in direct methanol fuel cells. Here, we prepared ultrathin Pt-M (M = Fe, Co, Ni) bimetallic networked nanowire using a soft template. These networked nanowires possess the one-dimension structural motif with a small diameter just around 2-3 nm and defect-rich surfaces (including grain boundaries, twin boundaries, and low-coordinated defects). Benefiting from the defect surface and electronic effect arising from the introduced transition metals, these Pt-M ultrathin nanowires (UNWs) exhibit enhanced electrocatalytic activity, CO tolerance, and stability toward methanol electrooxidation compared with monometallic Pt UNWs. In particular, due to the modified electronic structure from the appropriate content of Fe, Pt84Fe16 UNWs show 3.06-fold higher mass activity and 2.26-fold higher specific activity than those of Pt UNWs.

Original language	English
Pages (from-to)	10078-10086
Number of pages	9
Journal	Energy and Fuels
Volume	34
Issue number	8
DOIs	https://doi.org/10.1021/acs.energyfuels.0c01850
State	Published - 20 Aug 2020

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abstract = "How to improve the intrinsic activity of the Pt catalysts is still a pivotal issue in direct methanol fuel cells. Here, we prepared ultrathin Pt-M (M = Fe, Co, Ni) bimetallic networked nanowire using a soft template. These networked nanowires possess the one-dimension structural motif with a small diameter just around 2-3 nm and defect-rich surfaces (including grain boundaries, twin boundaries, and low-coordinated defects). Benefiting from the defect surface and electronic effect arising from the introduced transition metals, these Pt-M ultrathin nanowires (UNWs) exhibit enhanced electrocatalytic activity, CO tolerance, and stability toward methanol electrooxidation compared with monometallic Pt UNWs. In particular, due to the modified electronic structure from the appropriate content of Fe, Pt84Fe16 UNWs show 3.06-fold higher mass activity and 2.26-fold higher specific activity than those of Pt UNWs.",

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AU - Liu, Xiao Jing

AU - Sun, Yi Dan

AU - Yin, Xing

AU - Jia, Chun

AU - Ma, Meng

AU - Chen, Yuhui

PY - 2020/8/20

Y1 - 2020/8/20

N2 - How to improve the intrinsic activity of the Pt catalysts is still a pivotal issue in direct methanol fuel cells. Here, we prepared ultrathin Pt-M (M = Fe, Co, Ni) bimetallic networked nanowire using a soft template. These networked nanowires possess the one-dimension structural motif with a small diameter just around 2-3 nm and defect-rich surfaces (including grain boundaries, twin boundaries, and low-coordinated defects). Benefiting from the defect surface and electronic effect arising from the introduced transition metals, these Pt-M ultrathin nanowires (UNWs) exhibit enhanced electrocatalytic activity, CO tolerance, and stability toward methanol electrooxidation compared with monometallic Pt UNWs. In particular, due to the modified electronic structure from the appropriate content of Fe, Pt84Fe16 UNWs show 3.06-fold higher mass activity and 2.26-fold higher specific activity than those of Pt UNWs.

AB - How to improve the intrinsic activity of the Pt catalysts is still a pivotal issue in direct methanol fuel cells. Here, we prepared ultrathin Pt-M (M = Fe, Co, Ni) bimetallic networked nanowire using a soft template. These networked nanowires possess the one-dimension structural motif with a small diameter just around 2-3 nm and defect-rich surfaces (including grain boundaries, twin boundaries, and low-coordinated defects). Benefiting from the defect surface and electronic effect arising from the introduced transition metals, these Pt-M ultrathin nanowires (UNWs) exhibit enhanced electrocatalytic activity, CO tolerance, and stability toward methanol electrooxidation compared with monometallic Pt UNWs. In particular, due to the modified electronic structure from the appropriate content of Fe, Pt84Fe16 UNWs show 3.06-fold higher mass activity and 2.26-fold higher specific activity than those of Pt UNWs.

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Enhanced methanol electrooxidation over defect-rich Pt-M (M = Fe, Co, Ni) ultrathin nanowires

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