Figure 2. (IMAGE) Science China Press Caption The HER polarization curves of hollow PtNiCu nanoparticles, commercial Pt/C, hollow PtCoCu nanoparticles, hollow PtCu nanoparticles and Cu nanoparticles in 1.0 M KOH aqueous solution at a scan rate of 5 mV s-1. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.