Citation: Kai CHEN, Fengshun WU, Shun XIAO, Jinbao ZHANG, Lihua ZHU. PtRu/nitrogen-doped carbon for electrocatalytic methanol oxidation and hydrogen evolution by water electrolysis[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(7): 1357-1367. doi: 10.11862/CJIC.20230350 shu

PtRu/nitrogen-doped carbon for electrocatalytic methanol oxidation and hydrogen evolution by water electrolysis

College of Chemistry and Chemical Engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China

Corresponding author: Lihua ZHU, zhulihua156@163.com
Received Date: 21 September 2023
Revised Date: 24 May 2024

Figures(11)

Melamine, RuCl₃, and carbon black were dispersed in ethanol with a certain proportion, and a nitrogen-doped carbon (NC)-supported Ru catalyst (Ru/NC) was synthesized by spin evaporation drying and high-temperature thermal treatment. The PtRu/NC catalysts with different Pt and Ru contents were synthesized by sodium borohydride liquid phase chemical reduction, which was used for electrocatalytic methanol oxidation reaction (MOR) and hydrogen evolution reaction (HER) by water electrolysis. The results showed that Pt₁Ru/NC (mass fraction: 1.14% for Pt, 0.54% for Ru) had the best MOR performance among as-synthesized catalysts, with a mass activity of 4.96 A·mg_PtRu^-1, and it maintained 91.1% of the initial mass activity after 10 000 s stability test. In addition, when the current density was 100 mA·cm^-2, Pt₁Ru/NC exhibited the lowest overpotential (103 mV) and the smallest Tafel slope (15.29 mV·dec^-1) for HER. The characterization techniques of X-ray diffractometer (XRD), X -ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and STEM-energy-dispersive X-ray spectroscopy (STEM-EDS) were used to analyze the reasons for excellent catalytic performance of Pt₁Ru/NC, as follows: firstly, the PtRu bimetallic nanoparticles are highly dispersed on NC; secondly, Pt is loaded on Ru with nanoclusters or single atoms, forming Pt-Ru phase segregation; thirdly, there is a synergistic effect between Pt, Ru, and N.
- nitrogen-doped carbon support,
- PtRu/NC catalyst,
- methanol oxidation reaction,
- hydrogen evolution reaction
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