scholarly journals Time-Resolved Detection of Surface Oxide Formation at Individual Gold Nanoparticles: Role in Electrocatalysis and New Approach for Sizing by Electrochemical Impacts

2016 ◽  
Vol 138 (39) ◽  
pp. 12755-12758 ◽  
Author(s):  
Cameron L. Bentley ◽  
Minkyung Kang ◽  
Patrick R. Unwin

1995 ◽  
Vol 384 (1-2) ◽  
pp. 99-103 ◽  
Author(s):  
P.G. Allen ◽  
S.D. Conradson ◽  
M.S. Wilson ◽  
S. Gottesfeld ◽  
I.D. Raistrick ◽  
...  


2021 ◽  
Vol 12 (1) ◽  
Author(s):  
P. Winkler ◽  
J. Zeininger ◽  
Y. Suchorski ◽  
M. Stöger-Pollach ◽  
P. Zeller ◽  
...  

AbstractScanning photoelectron microscopy (SPEM) and photoemission electron microscopy (PEEM) allow local surface analysis and visualising ongoing reactions on a µm-scale. These two spatio-temporal imaging methods are applied to polycrystalline Rh, representing a library of well-defined high-Miller-index surface structures. The combination of these techniques enables revealing the anisotropy of surface oxidation, as well as its effect on catalytic hydrogen oxidation. In the present work we observe, using locally-resolved SPEM, structure-sensitive surface oxide formation, which is summarised in an oxidation map and quantitatively explained by the novel step density (SDP) and step edge (SEP) parameters. In situ PEEM imaging of ongoing H2 oxidation allows a direct comparison of the local reactivity of metallic and oxidised Rh surfaces for the very same different stepped surface structures, demonstrating the effect of Rh surface oxides. Employing the velocity of propagating reaction fronts as indicator of surface reactivity, we observe a high transient activity of Rh surface oxide in H2 oxidation. The corresponding velocity map reveals the structure-dependence of such activity, representing a direct imaging of a structure-activity relation for plenty of well-defined surface structures within one sample.



2020 ◽  
Vol 38 (2) ◽  
pp. 022609 ◽  
Author(s):  
Nathan Marchack ◽  
Jon-l Innocent-Dolor ◽  
Marinus Hopstaken ◽  
Sebastian Engelmann


1993 ◽  
Vol 32 (Part 1, No. 11A) ◽  
pp. 4870-4877 ◽  
Author(s):  
Shinji Hayashi ◽  
Satoshi Kawata ◽  
Han Min Kim ◽  
Keiichi Yamamoto




2014 ◽  
Vol 630 ◽  
pp. 229-235 ◽  
Author(s):  
Mikhail Shipilin ◽  
Uta Hejral ◽  
Edvin Lundgren ◽  
Lindsay R. Merte ◽  
Chu Zhang ◽  
...  




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