摘要
Alcohol fuel electro-reforming is promising for green hydrogen generation while developing efficient bifunctional catalysts for alcohol fuel electrolysis is still very tricky.Herein,we for the first time proposed the electron-enriched Pt induced by CoSe_(2)has an efficient bi-functional catalytic ability for alcohol fuels electro-reforming of hydrogen in acid electrolytes.The theoretical calculation revealed the advantages of electron-enriched Pt surface for the adsorption of intermediate,which is well supported by spectroscopic analysis and CO-stripping techniques.Largely improved catalytic performances of activity,durability,and kinetics are demonstrated compared to the conventional alloy system and commercial Pt/C catalyst,due to the efficient synergism of Pt and CoSe_(2);the peak current density of Pt/CoSe_(2)for methanol(ethanol)oxidation is 87.61(48.27)m A cm^(-2),which is about 3.3(2.0)times higher than that of Pt/C catalyst and 2.0(1.5)times that of the traditional PtCo alloy catalysts.Impressively,about 80%of the initial current was found after 1000 cycles of stability test for alcohol fuel oxidation of Pt/CoSe_(2)catalyst,higher than that of Pt/C(ca.50%)and PtCo catalyst(65%).When Pt/CoSe_(2)catalyst serviced as bi-functional catalysts for electrolyzer,a low cell potential of 0.65(0.78)V for methanol(ethanol)electrolysis was required to reach 10 m A cm^(-2),which was about 1030(900)m V less than that of conventional water electrolysis using Pt/C as the catalyst.The current result is instructive for the design of novel bifunctional catalyst and the understanding of hydrogen generation via alcohol fuel electro-reforming.
基金
supported by the National Natural Science Foundation of China(21972124,22102105)
a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institution
the support of the Six Talent Peaks Project of Jiangsu Province(XCL-070-2018)。
