NMR evidence of a spatially resolved oscillation in the E_f-LDOS in a nanoscale platinum electrocatalyst

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• 作者：Tong ; YuYe ; Babu ; Panakkattu K. ; Wieckowski ; Andrzej ; Oldfield ; Eric
• 刊名：Chemical Physics Letters
• 出版年：2002
• 出版时间：July 30, 2002
• 年：2002
• 卷：361
• 期：3-4
• 页码：183-188
• 全文大小：123 K

文摘

Indirect nuclear spin–spin J-coupling measurements have been carried out on a conducting, carbon-supported 8.8 nm platinum electrocatalyst by using ¹⁹⁵Pt NMR. The J-coupling values show a marked variation across the spectrum. These J-coupling values were then transformed into the corresponding s-like Fermi level local density of states D_s(E_f,x), where x is the distance from the particle surface, revealing a spatially resolved oscillatory decay in D_s(E_f) which is responsible for the line broadening of the bulk peak in the ¹⁹⁵Pt NMR spectrum.