Details

Autor(en) / Beteiligte

• Wang, Ze-Hong
• Wu, Ya-Jiao
• Xue, Huan-Huan
• Zhou, Lin-Nan
• Geng, Wen-Chao
• Yi, Hai-Bo
• Li, Yong-Jun

Titel

What dictates which ion, I - or Br - , mediates the growth of cubic Pd nanocrystals?

Ist Teil von

• Physical chemistry chemical physics : PCCP, 2018, Vol.20 (16), p.10997-11002

Ort / Verlag

England: Royal Society of Chemistry

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Cubic Pd nanocrystals (CPNCs) as one of typical nanostructures are generally fabricated using I- or Br- as capping ions. However, which ion, I- or Br-, exclusively mediates the growth of CPNCs in a given reaction system is not well understood. Herein, regardless of I- or Br- as the capping ion, we successfully achieved CPNCs in the same reaction system simply by adjusting the pH. Based on the Finke-Watzky kinetic model, an increase in pH accelerates the overall reduction rate of Pd2+, and the formation of CPNCs only occurs over the range of specific solution reduction rate constants (k1). This kinetically illuminates that the reduction rate of Pd2+ is the physicochemical parameter that determines which ion, I- or Br-, dictates the growth of CPNCs. Also, density functional theory (DFT) calculations further elucidate the dependence of the reduction rate of Pd2+ on pH and the configuration of the activated Pd2+ complex.