Synthesis and electrocatalytic performance of multi-component nanoporous PtRuCuW alloy for direct methanol fuel cells

Xiaoting Chen; Hao Wang; Ying Wang; Qingguo Bai; Yulai Gao; Zhonghua Zhang

doi:10.3390/catal5031003

Synthesis and electrocatalytic performance of multi-component nanoporous PtRuCuW alloy for direct methanol fuel cells

Xiaoting Chen, Hao Wang, Ying Wang, Qingguo Bai, Yulai Gao, Zhonghua Zhang^*

^*Corresponding author for this work

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

26 Citations (Scopus)

Abstract

We have prepared a multi-component nanoporous PtRuCuW (np-PtRuCuW) electrocatalyst via a combined chemical dealloying and mechanical alloying process. The X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical measurements have been applied to characterize the microstructure and electrocatalytic activities of the np-PtRuCuW. The np-PtRuCuW catalyst has a unique three-dimensional bi-continuous ligament structure and the length scale is 2.0 ± 0.3 nm. The np-PtRuCuW catalyst shows a relatively high level of activity normalized to mass (467.1 mA mg_Pt^-1) and electrochemically active surface area (1.8 mA cm^-2) compared to the state-of-the-art commercial PtC and PtRu catalyst at anode. Although the CO stripping peak of np-PtRuCuW 0.47 V (vs. saturated calomel electrode, SCE) is more positive than PtRu, there is a 200 mV negative shift compared to PtC (0.67 V vs. SCE). In addition, the half-wave potential and specific activity towards oxygen reduction of np-PtRuCuW are 0.877 V (vs. reversible hydrogen electrode, RHE) and 0.26 mA cm^-2, indicating a great enhancement towards oxygen reduction than the commercial PtC.

Original language	English
Pages (from-to)	1003-1015
Number of pages	13
Journal	Catalysts
Volume	5
Issue number	3
DOIs	https://doi.org/10.3390/catal5031003
Publication status	Published - 24 Jun 2015
Externally published	Yes

Keywords

Dealloying
Direct methanol fuel cells
Methanol oxidation
Nanoporous alloys
Oxygen reduction reaction

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10.3390/catal5031003

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Chen, X., Wang, H., Wang, Y., Bai, Q., Gao, Y., & Zhang, Z. (2015). Synthesis and electrocatalytic performance of multi-component nanoporous PtRuCuW alloy for direct methanol fuel cells. Catalysts, 5(3), 1003-1015. https://doi.org/10.3390/catal5031003

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title = "Synthesis and electrocatalytic performance of multi-component nanoporous PtRuCuW alloy for direct methanol fuel cells",

abstract = "We have prepared a multi-component nanoporous PtRuCuW (np-PtRuCuW) electrocatalyst via a combined chemical dealloying and mechanical alloying process. The X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical measurements have been applied to characterize the microstructure and electrocatalytic activities of the np-PtRuCuW. The np-PtRuCuW catalyst has a unique three-dimensional bi-continuous ligament structure and the length scale is 2.0 ± 0.3 nm. The np-PtRuCuW catalyst shows a relatively high level of activity normalized to mass (467.1 mA mgPt-1) and electrochemically active surface area (1.8 mA cm-2) compared to the state-of-the-art commercial PtC and PtRu catalyst at anode. Although the CO stripping peak of np-PtRuCuW 0.47 V (vs. saturated calomel electrode, SCE) is more positive than PtRu, there is a 200 mV negative shift compared to PtC (0.67 V vs. SCE). In addition, the half-wave potential and specific activity towards oxygen reduction of np-PtRuCuW are 0.877 V (vs. reversible hydrogen electrode, RHE) and 0.26 mA cm-2, indicating a great enhancement towards oxygen reduction than the commercial PtC.",

keywords = "Dealloying, Direct methanol fuel cells, Methanol oxidation, Nanoporous alloys, Oxygen reduction reaction",

author = "Xiaoting Chen and Hao Wang and Ying Wang and Qingguo Bai and Yulai Gao and Zhonghua Zhang",

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T1 - Synthesis and electrocatalytic performance of multi-component nanoporous PtRuCuW alloy for direct methanol fuel cells

AU - Chen, Xiaoting

AU - Wang, Hao

AU - Wang, Ying

AU - Bai, Qingguo

AU - Gao, Yulai

AU - Zhang, Zhonghua

PY - 2015/6/24

Y1 - 2015/6/24

N2 - We have prepared a multi-component nanoporous PtRuCuW (np-PtRuCuW) electrocatalyst via a combined chemical dealloying and mechanical alloying process. The X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical measurements have been applied to characterize the microstructure and electrocatalytic activities of the np-PtRuCuW. The np-PtRuCuW catalyst has a unique three-dimensional bi-continuous ligament structure and the length scale is 2.0 ± 0.3 nm. The np-PtRuCuW catalyst shows a relatively high level of activity normalized to mass (467.1 mA mgPt-1) and electrochemically active surface area (1.8 mA cm-2) compared to the state-of-the-art commercial PtC and PtRu catalyst at anode. Although the CO stripping peak of np-PtRuCuW 0.47 V (vs. saturated calomel electrode, SCE) is more positive than PtRu, there is a 200 mV negative shift compared to PtC (0.67 V vs. SCE). In addition, the half-wave potential and specific activity towards oxygen reduction of np-PtRuCuW are 0.877 V (vs. reversible hydrogen electrode, RHE) and 0.26 mA cm-2, indicating a great enhancement towards oxygen reduction than the commercial PtC.

AB - We have prepared a multi-component nanoporous PtRuCuW (np-PtRuCuW) electrocatalyst via a combined chemical dealloying and mechanical alloying process. The X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical measurements have been applied to characterize the microstructure and electrocatalytic activities of the np-PtRuCuW. The np-PtRuCuW catalyst has a unique three-dimensional bi-continuous ligament structure and the length scale is 2.0 ± 0.3 nm. The np-PtRuCuW catalyst shows a relatively high level of activity normalized to mass (467.1 mA mgPt-1) and electrochemically active surface area (1.8 mA cm-2) compared to the state-of-the-art commercial PtC and PtRu catalyst at anode. Although the CO stripping peak of np-PtRuCuW 0.47 V (vs. saturated calomel electrode, SCE) is more positive than PtRu, there is a 200 mV negative shift compared to PtC (0.67 V vs. SCE). In addition, the half-wave potential and specific activity towards oxygen reduction of np-PtRuCuW are 0.877 V (vs. reversible hydrogen electrode, RHE) and 0.26 mA cm-2, indicating a great enhancement towards oxygen reduction than the commercial PtC.

KW - Dealloying

KW - Direct methanol fuel cells

KW - Methanol oxidation

KW - Nanoporous alloys

KW - Oxygen reduction reaction

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ER -

Synthesis and electrocatalytic performance of multi-component nanoporous PtRuCuW alloy for direct methanol fuel cells

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Keywords

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