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Role of graphene in improving catalytic behaviors of AuNPs/MoS2/Gr/Ni-F structure in hydrogen evolution reaction 下载免费PDF全文
Xian-Wu Xiu 《中国物理 B》2021,30(8):88801-088801
The efficient production of hydrogen through electrocatalytic decomposition of water has broad prospects in modern energy equipment. However, the catalytic efficiency and durability of hydrogen evolution catalyst are still very deficient, which need to be further explored. Here in this work, we prove that introducing a graphene layer (Gr) between the molybdenum disulfide and nickel foam (Ni-F) substrate can greatly improve the catalytic performance of the hybrid. Owing to the excitation of local surface plasmon resonance (LSPR) of gold nanoparticles (NPs), the electrocatalytic hydrogen releasing activity of the MoS2/Gr/Ni-F heterostructure is greatly improved. This results in a significant increase in the current density of AuNPs/MoS2/Gr/Ni-F composite material under light irradiation and in the dark at 0.2 V (versus reversible hydrogen electrode (RHE)), which is much better than in MoS2/Gr/Ni-F composite materials. The enhancement of hydrogen release can be attributed to the injection of hot electrons into MoS2/Gr/Ni-F by AuNPs, which will improve the electron density of MoS2/Gr/Ni-F, promote the reduction of H2O, and further reduce the activation energy of the electrocatalyst hydrogen evolution reaction (HER). We also prove that the introduction of graphene can improve its stability in acidic catalytic environments. This work provides a new way of designing efficient water splitting system. 相似文献
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Effect of RF power on the properties of transparent conducting zirconium-doped zinc oxide films prepared by RF magnetron sputtering 总被引:2,自引:0,他引:2 下载免费PDF全文
Transparent and conducting zirconium-doped zinc oxide films with
high transparency and relatively low resistivity have been
successfully prepared by radio frequency (RF) magnetron sputtering
at room temperature. The RF power is varied from 75 to 150W. At
first the crystallinity and conductivity of the film are improved
and then both of them show deterioration with the increase of the RF
power. The lowest resistivity achieved is 2.07×10-3\Omegacm
at an RF power of 100W with a Hall mobility of
16cm2V-1s-1 and a carrier concentration of
1.95×1020cm-3. The films obtained are polycrystalline
with a hexagonal structure and a preferred orientation along the
c-axis. All the films have a high transmittance of approximately
92% in the visible range. The optical band gap is about 3.33eV
for the films deposited at different RF powers. 相似文献
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The properties of transparent conducting molybdenum-doped ZnO films grown by radio frequency magnetron sputtering 下载免费PDF全文
Transparent conducting molybdenum-doped zinc oxide films are prepared by radio frequency(RF) magnetron sputtering at ambient temperature.The MoO3 content in the target varies from 0 to 5 wt%,and each film is polycrystalline with a hexagonal structure and a preferred orientation along the c axis.The resistivity first decreases and then increases with the increase in MoO3 content.The lowest resistivity achieved is 9.2 × 10-4.cm,with a high Hall mobility of 30 cm2.V-1.s-1 and a carrier concentration of 2.3×1020 cm-3 at an MoO3 content of 2 wt%.The average transmittance in the visible range is reduced from 91% to 80% with the increase in the MoO3 content in the target. 相似文献
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