Vanadium Oxide Clusters Decorated Metallic Cobalt Catalyst for Active Alkaline Hydrogen Evolution

Yibing Li; Xin Tan; Wanfeng Yang; Xin Bo; Zhen Su; Tingwen Zhao; Sean C. Smith; Chuan Zhao

doi:10.1016/j.xcrp.2020.100275

Vanadium Oxide Clusters Decorated Metallic Cobalt Catalyst for Active Alkaline Hydrogen Evolution

Yibing Li, Xin Tan, Wanfeng Yang, Xin Bo, Zhen Su, Tingwen Zhao, Sean C. Smith, Chuan Zhao^*

^*Corresponding author for this work

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

16 Citations (Scopus)

Abstract

Promoting active and stable H₂ evolution reaction (HER) on metallic Fe triad materials is important yet challenging. Here, we report a metallic Co catalyst modulated by vanadium oxide (VOx) clusters (denoted as Co(VOx)) for active alkaline HER activity. Systematic X-ray absorption spectroscopy (XAS) and X-ray crystallography studies verify that VOx clusters endow Co with a highly disordered lattice and downsized particle size. The best Co(VOx) electrode is achieved with an optimal doping level of 3%, which delivers −100 mA cm⁻² at an overpotential merely of 178 mV, in contrast to 344 mV and continuous activity decay on pure Co. The lower or higher doping level is unable either to regulate the atomic structure and reduce the H binding or to provide fewer active sites. Density functional theory (DFT) calculations reveal that VOx enables efficient electron transfer from Co to VOx, thus decreasing the H-adsorption on V-Co(001) for enhanced HER.

Original language	English
Article number	100275
Journal	Cell Reports Physical Science
Volume	1
Issue number	12
DOIs	https://doi.org/10.1016/j.xcrp.2020.100275
Publication status	Published - 23 Dec 2020

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@article{a3177c309fb549be9ca45015044edfc5,

title = "Vanadium Oxide Clusters Decorated Metallic Cobalt Catalyst for Active Alkaline Hydrogen Evolution",

abstract = "Promoting active and stable H2 evolution reaction (HER) on metallic Fe triad materials is important yet challenging. Here, we report a metallic Co catalyst modulated by vanadium oxide (VOx) clusters (denoted as Co(VOx)) for active alkaline HER activity. Systematic X-ray absorption spectroscopy (XAS) and X-ray crystallography studies verify that VOx clusters endow Co with a highly disordered lattice and downsized particle size. The best Co(VOx) electrode is achieved with an optimal doping level of 3%, which delivers −100 mA cm−2 at an overpotential merely of 178 mV, in contrast to 344 mV and continuous activity decay on pure Co. The lower or higher doping level is unable either to regulate the atomic structure and reduce the H binding or to provide fewer active sites. Density functional theory (DFT) calculations reveal that VOx enables efficient electron transfer from Co to VOx, thus decreasing the H-adsorption on V-Co(001) for enhanced HER.",

keywords = "Co(VOx), H evolution, XAS, downsize and disorder, operando Raman",

author = "Yibing Li and Xin Tan and Wanfeng Yang and Xin Bo and Zhen Su and Tingwen Zhao and Smith, {Sean C.} and Chuan Zhao",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = dec,

day = "23",

doi = "10.1016/j.xcrp.2020.100275",

language = "English",

volume = "1",

journal = "Cell Reports Physical Science",

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T1 - Vanadium Oxide Clusters Decorated Metallic Cobalt Catalyst for Active Alkaline Hydrogen Evolution

AU - Li, Yibing

AU - Tan, Xin

AU - Yang, Wanfeng

AU - Bo, Xin

AU - Su, Zhen

AU - Zhao, Tingwen

AU - Smith, Sean C.

AU - Zhao, Chuan

PY - 2020/12/23

Y1 - 2020/12/23

N2 - Promoting active and stable H2 evolution reaction (HER) on metallic Fe triad materials is important yet challenging. Here, we report a metallic Co catalyst modulated by vanadium oxide (VOx) clusters (denoted as Co(VOx)) for active alkaline HER activity. Systematic X-ray absorption spectroscopy (XAS) and X-ray crystallography studies verify that VOx clusters endow Co with a highly disordered lattice and downsized particle size. The best Co(VOx) electrode is achieved with an optimal doping level of 3%, which delivers −100 mA cm−2 at an overpotential merely of 178 mV, in contrast to 344 mV and continuous activity decay on pure Co. The lower or higher doping level is unable either to regulate the atomic structure and reduce the H binding or to provide fewer active sites. Density functional theory (DFT) calculations reveal that VOx enables efficient electron transfer from Co to VOx, thus decreasing the H-adsorption on V-Co(001) for enhanced HER.

AB - Promoting active and stable H2 evolution reaction (HER) on metallic Fe triad materials is important yet challenging. Here, we report a metallic Co catalyst modulated by vanadium oxide (VOx) clusters (denoted as Co(VOx)) for active alkaline HER activity. Systematic X-ray absorption spectroscopy (XAS) and X-ray crystallography studies verify that VOx clusters endow Co with a highly disordered lattice and downsized particle size. The best Co(VOx) electrode is achieved with an optimal doping level of 3%, which delivers −100 mA cm−2 at an overpotential merely of 178 mV, in contrast to 344 mV and continuous activity decay on pure Co. The lower or higher doping level is unable either to regulate the atomic structure and reduce the H binding or to provide fewer active sites. Density functional theory (DFT) calculations reveal that VOx enables efficient electron transfer from Co to VOx, thus decreasing the H-adsorption on V-Co(001) for enhanced HER.

KW - Co(VOx)

KW - H evolution

KW - XAS

KW - downsize and disorder

KW - operando Raman

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U2 - 10.1016/j.xcrp.2020.100275

DO - 10.1016/j.xcrp.2020.100275

M3 - Article

SN - 2666-3864

VL - 1

JO - Cell Reports Physical Science

JF - Cell Reports Physical Science

IS - 12

M1 - 100275

ER -

Vanadium Oxide Clusters Decorated Metallic Cobalt Catalyst for Active Alkaline Hydrogen Evolution

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