Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid

作者：Wang Ying; Sun Yuanmiao; Liao Hanbin; Sun Shengnan; Li Shuzhou; Ager Joel W III; Xu Zhichuan J

来源：Electrochimica Acta, 2016, 209: 440-447.

DOI：10.1016/j.electacta.2016.05.095

• electrocatalysis
• gold
• nanoparticles
• hydrogen evolution reaction

This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64 V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128 mV drop of the overpotential, a decrease of 23 mV/dec for the Tafel slope as well as a nearly twenty times increase of the turn-over frequency (TOF). This enhanced activity is tentatively assigned to the formation of stepped like structures by the consecutive electrochemical cycling in the double layer region.

• 出版日期2016-8-10