Pt Monolayer Creation on a Au Surface via an Underpotentially Deposited Cu Route

2019 ◽  
Vol 123 (5) ◽  
pp. 2872-2881 ◽  
Author(s):  
Deyu Qu ◽  
Chan-Yong Jung ◽  
Chi-Woo Lee ◽  
Kohei Uosaki
Keyword(s):  
Underpotentially Deposited

The role of underpotentially deposited silver on platinum in sers

1989 ◽  
Vol 222 (2-3) ◽  
pp. L861-L870
Author(s):  
L.C. Tuo ◽  
T.T. Chen ◽  
Y.C. Chou ◽  
N.T. Liang
Keyword(s):  
Underpotentially Deposited

scholarly journals Ultrathin Film PtxPd(1-x) Alloy Catalysts for Formic Acid Oxidation Synthesized by Surface Limited Redox Replacement of Underpotentially Deposited H Monolayer

Electrochem ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 4-19
Author(s):  
Innocent Achari ◽  
Nikolay Dimitrov
Keyword(s):  
Formic Acid ◽  
Sacrificial Layer ◽  
Close Correlation ◽  
Formic Acid Oxidation ◽  
Ultrathin Film ◽  
Molar Ratio ◽  
Acid Oxidation ◽  
Synthetic Approach ◽  
Alloy Catalysts ◽  
Underpotentially Deposited

This work emphasizes the development of a green synthetic approach for growing ultrathin film PtxPd(1-x) alloy catalysts for formic acid oxidation (FAO) by surface limited redox replacement of underpotentially deposited H sacrificial layer. Up to three-monolayers-thick PtxPd(1-x) films with different composition are generated on Au electrodes and characterized for composition and surface roughness using XPS and electrochemical methods, respectively. XPS results show close correlation between solution molar ratio and atomic composition, with slightly higher Pt fraction in the deposited films. The accordingly deposited Pt42Pd58 films demonstrated remarkable specific and mass activities of up to 35 mAcm−2 and 45 Amg−1 respectively, lasting for more than 1500 cycles in FAO tests. This performance, found to be better twice or more than that of pure Pt counterparts, renders the Pt42Pd58 films comparable with the frontrunner FAO catalysts. In addition, the best alloy catalyst establishes a nearly hysteresis-free FAO CV curve a lot earlier than its Pt counterpart and thus supports the direct FAO pathway for longer. Overall, the combination of high Pd activity and CO tolerance with the remarkable Pt stability results in highly active and durable FAO catalysts. Finally, this facile and cost-effective synthetic approach allows for scaling the catalyst production and is thus appropriate for foreseeable commercialization.

Direct determination of the mass of an underpotentially deposited monolayer of lead on gold

Langmuir ◽  
1986 ◽  
Vol 2 (6) ◽  
pp. 697-700 ◽  
Author(s):  
O. Melroy ◽  
K. Kanazawa ◽  
J. G. Gordon ◽  
D. Buttry
Keyword(s):  
Direct Determination ◽  
Underpotentially Deposited
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