Ru nanoassembly catalysts for hydrogen evolution and oxidation reactions in electrolytes at various pH values

Yuzhi Li; Janel Abbott; Yanchun Sun; Jianmin Sun; Yunchen Du; Xijiang Han; Gang Wu; Ping Xu

doi:10.1016/j.apcatb.2019.117952

Ru nanoassembly catalysts for hydrogen evolution and oxidation reactions in electrolytes at various pH values

Yuzhi Li
, Janel Abbott
, Yanchun Sun
, Jianmin Sun
, Yunchen Du
, Xijiang Han
, Gang Wu
, Ping Xu

Department of Chemical and Biological Engineering

Harbin Institute of Technology
SUNY Buffalo
Ministry of Agriculture of the People's Republic of China

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

142 Scopus citations

Abstract

Here, in an effort to prepare Ru-based metal organic frameworks, we developed a one-step solvothermal synthesis for Ru nanoassembly catalysts, which consist of ˜4 nm Ru nanoparticles well dispersed on amorphous carbon (Ru/C). The Ru/C catalyst obtained from a mixed solvent of H₂O and CH₃CH₂OH (Ru/C-H₂O/CH₃CH₂OH), featured a chain-like porous structure, provides Pt-like catalytic properties with low overpotentials at −10 mA cm⁻² for the hydrogen evolution reaction (HER) within a wide range of pH values, i.e., 35 mV in 0.5 M H₂SO₄, 53 mV in 1.0 M KOH, and 93 mV in 3.5 wt% NaCl. Ru/C is also an efficient hydrogen oxidation reaction (HOR) catalyst at all pH values. In the alkaline media, Ru/C-H₂O/CH₃CH₂OH achieves a mass activity of 41.1 mA mg^-1 at an overpotential of 50 mV and a high exchange current density (0.65 mA cm⁻²). The work provides a facile strategy to synthesize highly active Ru/C catalysts for bifunctional HER and HOR electrocatalysis.

Original language	English
Article number	117952
Journal	Applied Catalysis B: Environmental
Volume	258
DOIs	https://doi.org/10.1016/j.apcatb.2019.117952
State	Published - Dec 5 2019

Keywords

Electrocatalysts
HER
HOR
Reversible fuel cells
Ru nanoassembly

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10.1016/j.apcatb.2019.117952

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title = "Ru nanoassembly catalysts for hydrogen evolution and oxidation reactions in electrolytes at various pH values",

abstract = "Here, in an effort to prepare Ru-based metal organic frameworks, we developed a one-step solvothermal synthesis for Ru nanoassembly catalysts, which consist of ˜4 nm Ru nanoparticles well dispersed on amorphous carbon (Ru/C). The Ru/C catalyst obtained from a mixed solvent of H2O and CH3CH2OH (Ru/C-H2O/CH3CH2OH), featured a chain-like porous structure, provides Pt-like catalytic properties with low overpotentials at −10 mA cm−2 for the hydrogen evolution reaction (HER) within a wide range of pH values, i.e., 35 mV in 0.5 M H2SO4, 53 mV in 1.0 M KOH, and 93 mV in 3.5 wt\% NaCl. Ru/C is also an efficient hydrogen oxidation reaction (HOR) catalyst at all pH values. In the alkaline media, Ru/C-H2O/CH3CH2OH achieves a mass activity of 41.1 mA mg-1 at an overpotential of 50 mV and a high exchange current density (0.65 mA cm−2). The work provides a facile strategy to synthesize highly active Ru/C catalysts for bifunctional HER and HOR electrocatalysis.",

keywords = "Electrocatalysts, HER, HOR, Reversible fuel cells, Ru nanoassembly",

author = "Yuzhi Li and Janel Abbott and Yanchun Sun and Jianmin Sun and Yunchen Du and Xijiang Han and Gang Wu and Ping Xu",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = dec,

day = "5",

doi = "10.1016/j.apcatb.2019.117952",

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T1 - Ru nanoassembly catalysts for hydrogen evolution and oxidation reactions in electrolytes at various pH values

AU - Li, Yuzhi

AU - Abbott, Janel

AU - Sun, Yanchun

AU - Sun, Jianmin

AU - Du, Yunchen

AU - Han, Xijiang

AU - Wu, Gang

AU - Xu, Ping

PY - 2019/12/5

Y1 - 2019/12/5

N2 - Here, in an effort to prepare Ru-based metal organic frameworks, we developed a one-step solvothermal synthesis for Ru nanoassembly catalysts, which consist of ˜4 nm Ru nanoparticles well dispersed on amorphous carbon (Ru/C). The Ru/C catalyst obtained from a mixed solvent of H2O and CH3CH2OH (Ru/C-H2O/CH3CH2OH), featured a chain-like porous structure, provides Pt-like catalytic properties with low overpotentials at −10 mA cm−2 for the hydrogen evolution reaction (HER) within a wide range of pH values, i.e., 35 mV in 0.5 M H2SO4, 53 mV in 1.0 M KOH, and 93 mV in 3.5 wt% NaCl. Ru/C is also an efficient hydrogen oxidation reaction (HOR) catalyst at all pH values. In the alkaline media, Ru/C-H2O/CH3CH2OH achieves a mass activity of 41.1 mA mg-1 at an overpotential of 50 mV and a high exchange current density (0.65 mA cm−2). The work provides a facile strategy to synthesize highly active Ru/C catalysts for bifunctional HER and HOR electrocatalysis.

AB - Here, in an effort to prepare Ru-based metal organic frameworks, we developed a one-step solvothermal synthesis for Ru nanoassembly catalysts, which consist of ˜4 nm Ru nanoparticles well dispersed on amorphous carbon (Ru/C). The Ru/C catalyst obtained from a mixed solvent of H2O and CH3CH2OH (Ru/C-H2O/CH3CH2OH), featured a chain-like porous structure, provides Pt-like catalytic properties with low overpotentials at −10 mA cm−2 for the hydrogen evolution reaction (HER) within a wide range of pH values, i.e., 35 mV in 0.5 M H2SO4, 53 mV in 1.0 M KOH, and 93 mV in 3.5 wt% NaCl. Ru/C is also an efficient hydrogen oxidation reaction (HOR) catalyst at all pH values. In the alkaline media, Ru/C-H2O/CH3CH2OH achieves a mass activity of 41.1 mA mg-1 at an overpotential of 50 mV and a high exchange current density (0.65 mA cm−2). The work provides a facile strategy to synthesize highly active Ru/C catalysts for bifunctional HER and HOR electrocatalysis.

KW - Electrocatalysts

KW - HER

KW - HOR

KW - Reversible fuel cells

KW - Ru nanoassembly

UR - https://www.scopus.com/pages/publications/85068909576

U2 - 10.1016/j.apcatb.2019.117952

DO - 10.1016/j.apcatb.2019.117952

M3 - Article

AN - SCOPUS:85068909576

SN - 0926-3373

VL - 258

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 117952

ER -

Ru nanoassembly catalysts for hydrogen evolution and oxidation reactions in electrolytes at various pH values

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