Indirect (hydrogen-driven) electrodeposition of porous silver onto a palladium membrane
Indirect (hydrogen-driven) electrodeposition of porous silver onto a palladium membrane
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DOI：
10.1007/s10008-020-04592-4
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发表时间：
2020-04
影响因子：
2.5
通讯作者：
Tinakorn Kanyanee;P. Fletcher;E. Madrid;F. Marken
中科院分区：
文献类型：
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作者：
Tinakorn Kanyanee;P. Fletcher;E. Madrid;F. Marken
氢气渗透穿过纯钯膜（25 μm 厚，光学致密），用于触发外部钯处的电子转移（氢驱动）反应 |二室电化学电池的水电解质界面。研究了两个系统，以证明（i）外部施加电势的间接氢介导银电沉积和（ii）由外部甲酸分解驱动的间接氢介导银电沉积的可行性。在这两种情况下，通过光学和电子显微镜观察，都会形成多孔金属沉积物。由于金属沉积会阻挡钯表面，从而减缓氢的进一步渗透，因此该过程是自我限制的。所提出的方法可用于更广泛的金属，并且它们可以为金属去除或金属回收过程或间接金属传感提供替代（非电化学或间接）程序。图形摘要
Hydrogen permeation through a pure palladium film (25 μm thickness, optically dense) is employed to trigger electron transfer (hydrogen-driven) reactions at the external palladium | aqueous electrolyte interface of a two-compartment electrochemical cell. Two systems are investigated to demonstrate feasibility for (i) indirect hydrogen-mediated silver electrodeposition with externally applied potential and (ii) indirect hydrogen-mediated silver electrodeposition driven by external formic acid decomposition. In both cases, porous metal deposits form as observed by optical and electron microscopies. Processes are self-limited as metal deposition blocks the palladium surface and thereby slows down further hydrogen permeation. The proposed methods could be employed for a wider range of metals, and they could provide an alternative (non-electrochemical or indirect) procedure for metal removal or metal recovery processes or for indirect metal sensing.Graphical abstract