In the present work, the effect of surface strain in the carbon supported Pt₃Co dealloy catalyst towards hydrogen evolution reaction (HER) has been reported. Dealloying process is adopted to generate the geometric strain in Pt₃Co/C alloy by preferential dissolution of non-noble metal (Co) from the alloy. The developed geometric strain has been estimated by different microstructural characterization techniques. Electrochemical studies showed that the highest current density for HER was obtained for Pt₃Co/C dealloy catalyst and it was nearly 2 and 5 times higher than Pt₃Co/C alloy and Pt/C respectively. Tafel slope for HER was improved from 49 (Pt/C) to 34 mV dec⁻¹ (Pt₃Co/C dealloy), indicating that the surface strain plays important role in the improvement of the catalytic activity of Pt₃Co catalyst. The chronoamperometry data, LSV curves and ECSA values before and after chronoamperometry confirmed that Pt₃Co/C dealloy catalyst was a stable as well as a durable electrocatalyst for HER.

在目前的工作中，已经报道了碳负载的Pt ₃ Co脱合金催化剂中的表面应变对氢析出反应（HER）的影响。采用脱合金工艺通过优先从合金中溶解非贵金属（Co）来在Pt ₃ Co / C合金中产生几何应变。已经通过不同的微结构表征技术估计了所发展的几何应变。电化学研究表明，Pt ₃ Co / C脱合金催化剂可获得最高的HER电流密度，分别是Pt ₃ Co / C合金和Pt / C的近2倍和5倍。HER的Tafel斜率从49（Pt / C）提高到34 mV dec ^-1（Pt ₃Co / C合金），表明表面应变在提高Pt ₃ Co催化剂的催化活性方面起着重要作用。计时电流法之前和之后的计时电流法数据，LSV曲线和ECSA值证实，Pt ₃ Co / C脱合金催化剂是HER的稳定和耐用电催化剂。