Match!
Zhaoyi Yang
University of Science and Technology Beijing
CatalysisInorganic chemistryDirect methanol fuel cellCathodeElectrochemistry
7Publications
3H-index
25Citations
What is this?
Publications 7
Newest
#1Zhaoyi Yang (USTB: University of Science and Technology Beijing)H-Index: 3
#2Meng Wang (USTB: University of Science and Technology Beijing)H-Index: 9
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
view all 8 authors...
Herein, the pulse temperature is provided during the nucleation period of the nanoparticles to shorten the nucleation time for Pt-based nanoparticle growth. Herein, 3-nm-sized Pt-Ni alloy octahedral catalysts were prepared by pulse-like hydrothermal method. The influence of the pulse on nucleation is demonstrated by comparing the morphology obtained from the conditions of constant temperature and pulse temperature. It has been found that pulse temperature could decrease the nucleation time, and ...
Source
#1Zhaoyi Yang (USTB: University of Science and Technology Beijing)H-Index: 3
#2Ming Chen (USTB: University of Science and Technology Beijing)H-Index: 20
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
view all 5 authors...
Abstract In order to inhibit the corrosion of carbon support and agglomeration of Pt nanoparticles in conventional Pt/XC-72 catalyst, the conventional Pt/C catalyst was modified by in-situ deposition of amorphous tungsten carbide (WC) at the catalyst/support interface. The results show that proper amount of WC can improve the performance and durability of catalyst, and excessive addition of W element will combine with oxygen and transform into WO3, thus covering Pt nanoparticles and reducing the...
1 CitationsSource
#1Meng Wang (USTB: University of Science and Technology Beijing)H-Index: 9
#2Ming Chen (USTB: University of Science and Technology Beijing)H-Index: 20
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
view all 7 authors...
Abstract This paper mainly focuses on the optimization and design of cathode catalyst layer structure for low-Pt loading membrane assembly electrode. When Pt loading at cathode increased from 0.025 mg cm−2 to 0.4 mg cm−2, the apparent current density of electrode increases gradually, while the electrochemical active surface area (ECSA) and the utilization rate of catalyst show a downward trend. As Pt loading at cathode keeps at 0.1 mg cm−2, commercial Vulcan XC-72 carbon are doped into the conve...
1 CitationsSource
#1Ming Chen (USTB: University of Science and Technology Beijing)H-Index: 20
#2Meng Wang (USTB: University of Science and Technology Beijing)H-Index: 9
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
view all 5 authors...
Abstract This paper focuses on the gradual performance and durability degradation behaviors of a direct methanol fuel cell (DMFC) with more than 3000 h lifetime. This work adopted a new DMFC test strategy and the entire lifetime test consisted of No.1-No.166 single operation. Stage-failure phenomenon occurred in the lifetime test, which indicated the existence of recoverable and non-recoverable degradations during the entire operation process. In-situ electrochemical tests were applied to the DM...
3 CitationsSource
#1Meng Wang (USTB: University of Science and Technology Beijing)H-Index: 9
#2Ming Chen (USTB: University of Science and Technology Beijing)H-Index: 20
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
view all 8 authors...
Abstract Hydrogen peroxide is added into the anode methanol fuel as a pro-oxygenic agent to improve the electro-oxidation reaction rate of methanol in low-temperature direct methanol fuel cell. Cyclic voltammetry, electrochemical impedance spectroscopy and steady-state polarization with three-electrode system are used to test the catalytic efficiency with different concentrations of hydrogen peroxide additive. The mechanism of pro-oxygenic activity is revealed by cyclic voltammetry method. The r...
4 CitationsSource
#1Peipeng Li (USTB: University of Science and Technology Beijing)H-Index: 1
#2Xianan Ding (USTB: University of Science and Technology Beijing)H-Index: 7
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
view all 6 authors...
This article reported the electrochemical deposition of polyaniline (PANI) on 316-L stainless steel (316LSS) to improve the anti-corrosion performance as PEMFC metal bipolar plates. The results indicate that PANI can increase the corrosion potential of 316LSS by more than 410.57 mV and effectively decrease the corrosion current density by four orders of magnitude in comparison with the uncoated 316LSS. The experimental results showed that the PANI increased the open-circuit potential of the stee...
3 CitationsSource
#1Guicheng Liu (KIST: Korea Institute of Science and Technology)H-Index: 15
#2Zhaoyi Yang (USTB: University of Science and Technology Beijing)H-Index: 3
Last. Joong Kee Lee (KIST: Korea Institute of Science and Technology)H-Index: 33
view all 9 authors...
Abstract To realize gradient activation effect and recover catalytic activity of catalyst in a short time, a gradient activation method has firstly been proposed for enhancing discharge performance and perfecting activation mechanism of the direct methanol fuel cell (DMFC). This method includes four steps, i.e. proton activation, activity recovery activation, H 2 -O 2 mode activation and forced discharging activation. The results prove that the proposed method has gradually realized replenishmen...
13 CitationsSource
1