Hydrogen Sorption Kinetics on Bare and Platinum-Modified Palladium Nanofilms, Grown by Electrochemical Atomic Layer Deposition (E-ALD)

Hydrogen Sorption Kinetics on Bare and Platinum-Modified Palladium Nanofilms, Grown by Electrochemical Atomic Layer Deposition (E-ALD)
复制标题

通过电化学原子层沉积 (E-ALD) 生长的裸钯纳米膜和铂改性钯纳米膜的氢吸附动力学

DOI:
10.1149/2.0051612jes
复制
发表时间:
2016
影响因子:
3.9
通讯作者:
Stickney, John L.
Stickney, John L.
中科院分区:
工程技术4区
文献类型:
--
作者:
Jagannathan, Kaushik;Benson, David M.;Robinson, David B.;Stickney, John L.

文献摘要

参考文献

相似文献

采用电化学原子层沉积(E-ALD)的方法在玻璃表面100 nm蒸发Au膜上制备了Pd纳米薄膜。多个周期的表面受限氧化还原置换(SLRR)被用来生长沉积物。每个SLRR包括铜原子层的欠电位沉积(UPD),然后通过与四氯钯酸氧化还原交换的开路置换,形成一个Pd原子层:一个E-ALD沉积周期。为了生长出所需厚度的沉积物,重复了这一循环。在Au玻璃上沉积了5个循环的Pd,形成了2.5单分子层的Pd。然后用不同的铂覆盖率对这些Pd膜进行修饰,也是使用SLRR形成的。通过改变铜UPD的电位和增加铂沉积循环的次数来控制铂的量。用库仑法和循环伏安法研究了在0.1MH2 SO4中的吸氢与铂覆盖度的关系。即使只有一小部分铂单分子膜的存在,也会极大地提高氢的脱附速度。然而,这并没有降低薄膜的储氢容量。在铂存在的情况下,解吸速率增加了一个数量级以上。
Nanofilms of Pd were grown using an electrochemical form of atomic layer deposition (E-ALD) on 100 nm evaporated Au films on glass. Multiple cycles of surface-limited redox replacement (SLRR) were used to grow deposits. Each SLRR involved the underpotential deposition (UPD) of a Cu atomic layer, followed by open circuit replacement via redox exchange with tetrachloropalladate, forming a Pd atomic layer: one E-ALD deposition cycle. That cycle was repeated in order to grow deposits of a desired thickness. 5 cycles of Pd deposition were performed on the Au on glass substrates, resulting in the formation of 2.5 monolayers of Pd. Those Pd films were then modified with varying coverages of Pt, also formed using SLRR. The amount of Pt was controlled by changing the potential for Cu UPD, and by increasing the number of Pt deposition cycles. Hydrogen absorption was studied using coulometry and cyclic voltammetry in 0.1 MH 2 SO 4 as a function of Pt coverage. The presence of even a small fraction of a Pt monolayer dramatically increased the rate of hydrogen desorption. However, this did not reduce the films' hydrogen storage capacity. The increase in desorption rate in the presence of Pt was over an order of magnitude.
DOI: 10.1149/1.1390925
发表时间: 1999-12
影响因子: --
作者:
T. Wade;L. C. Ward;Clinton B. Maddox;U. Happek;J. Stickney
通讯作者: T. Wade;L. C. Ward;Clinton B. Maddox;U. Happek;J. Stickney
DOI: --
发表时间: 1991
期刊:
影响因子: --
作者:
A. Czerwiński;S. Zamponi;R. Marassi
通讯作者: R. Marassi
DOI: --
发表时间: --
期刊:
影响因子: --
作者:
P. Bartlett;J. Marwan
通讯作者: J. Marwan
金属氢化物的晶格动力学
DOI: --
发表时间: 1981
期刊:
影响因子: --
作者:
H. A. Rafizadeh
通讯作者: H. A. Rafizadeh
通过表面有限氧化还原置换反应生长的裸露和 Rh 修饰的 Pd 纳米膜的氢吸附特性
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
Leah B. Sheridan;Veronica M. Yates;David M Benson;J. Stickney;D. Robinson
通讯作者: D. Robinson