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Metal–Organic Framework-Derived CoWP@C Composite Nanowire Electrocatalyst for Efficient Water Splitting AITranslate

Baicheng Weng; Corey R. Grice; Weiwei Meng; Lei Guan; Fenghua Xu; Yue Yu; Changlei Wang; Dewei Zhao; Yanfa Yan;
The University of Toledo; The University of Toledo; The University of Toledo; The University of Toledo; The University of Toledo; The University of Toledo; The University of Toledo; The University of Toledo; The University of Toledo
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Publisher: ACS
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Abstract AITranslate

Practical application of electrochemical water splitting demands durable, efficient, and non-noble metal catalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Herein, we report a new hydrogen evolution nanowire electrocatalyst, consisting of S-doped CoWP nanoparticles embedded in S- and N-doped carbon matrix (S-CoWP@(S,N)-C), which is in situ transformed from Hofmann-type (Co, W)-based metal–organic framework (MOF) nanowires. Because of S and N doping to the carbon matrix and the S doping to CoWP nanoparticles, the obtained S-CoWP@(S,N)-C catalyst reaches a current density of −10 mA cm–2 at −35 and −67 mV (vs RHE) in acidic and alkaline electrolytes, respectively. Powered by a lead halide perovskite solar cell, an unassisted two-electrode solar water-splitting device using MOF-derived S-CoWP@(S,N)-C HER electrocatalysts and S-CoW@(S,N)-C OER electrocatalysts displays a solar-to-hydrogen conversion efficiency of 10.98%. Our method is highly applicable for developing robust electrocatalysts toward efficient and low-cost solar-driven water splitting.

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DOI：https://doi.org/10.1021/acsenergylett.8b00584

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Citation Information:

Practical application of electrochemical water splitting demands durable, efficient, and non-noble metal catalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Herein, we report a new hydrogen evolution nanowire electrocatalyst, consisting of S-doped CoWP nanoparticles embedded in S- and N-doped carbon matrix (S-CoWP@(S,N)-C), which is in situ transformed from Hofmann-type (Co, W)-based metal–organic framework (MOF) nanowires. Because of S and N doping to the carbon matrix and the S doping to CoWP nanoparticles, the obtained S-CoWP@(S,N)-C catalyst reaches a current density of −10 mA cm–2 at −35 and −67 mV (vs RHE) in acidic and alkaline electrolytes, respectively. Powered by a lead halide perovskite solar cell, an unassisted two-electrode solar water-splitting device using MOF-derived S-CoWP@(S,N)-C HER electrocatalysts and S-CoW@(S,N)-C OER electrocatalysts displays a solar-to-hydrogen conversion efficiency of 10.98%. Our method is highly applicable for developing robust electrocatalysts toward efficient and low-cost solar-driven water splitting.

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GB/T 7714-2015 [1] Baicheng Weng, Corey R. Grice, Weiwei Meng, et al. ACS Energy Letters, 2018(3). DOI:10.1021/acsenergylett.8b00584.
MLA [1] Baicheng Weng, et al., ACS Energy Letters, no. 3, 2018, https://doi.org/10.1021/acsenergylett.8b00584.
APA [1] Baicheng Weng, Corey R. Grice, Weiwei Meng, Lei Guan, Fenghua Xu, Yue Yu, Changlei Wang, Dewei Zhao, & Yanfa Yan. (2018). ACS Energy Letters(3). https://doi.org/10.1021/acsenergylett.8b00584
IEEE [1] Baicheng Weng, Corey R. Grice, Weiwei Meng, Lei Guan, Fenghua Xu, Yue Yu, Changlei Wang, Dewei Zhao, and Yanfa Yan, ACS Energy Letters, no. 3, 2018, doi: 10.1021/acsenergylett.8b00584.