Herein, PVA-Mo₂C/Mo₂N nanospheres with surface roughness are synthesized via a polyvinyl alcohol (PVA) involved approach and used for hydrogen evolution reaction (HER). The average crystallite size of the PVA protected PVA-Mo₂C/Mo₂N nanospheres (6.1 nm) is one third of that of the PVA-Mo₂C/Mo₂N without PVA protection (17.9 nm). At 10 mA cm⁻² current density, the as-synthesized PVA-Mo₂C/Mo₂N nanospheres with surface roughness exhibits HER overpotentials of 132 mV and 142 mV with corresponding Tafel slope of 51.8 mV dec⁻¹ and 50.4 mV dec⁻¹ in acid and alkaline medium, respectively. This high apparent activity can be attributed to the high intrinsic activity originated from the adjacent surface active sites of Mo₂C and Mo₂N as well as the large ECSA of PVA-Mo₂C/Mo₂N nanospheres with surface roughness.

在此，通过涉及聚乙烯醇（PVA）的方法合成具有表面粗糙度的PVA-Mo ₂ C / Mo ₂ N纳米球，并将其用于析氢反应（HER）。PVA的平均微晶尺寸，保护PVA-沫₂ C /沫₂ Ñ纳米球（6.1 nm）为三分之一的该PVA-的Mo ₂ C /沫₂ Ñ不用PVA保护（17.9纳米）。在10mA厘米^-2的电流密度，所合成的PVA-沫₂ C /沫₂ Ñ纳米球的表面粗糙度显示出HER超电势132毫伏和142毫伏与对应51.8毫伏癸的塔菲尔斜率^-1和50.4毫伏癸^{- 1个}分别在酸性和碱性介质中。这种高的表观活性可以归因于源自于Mo ₂ C和Mo ₂ N的相邻表面活性位的高固有活性，以及具有表面粗糙度的PVA-Mo ₂ C / Mo ₂ N纳米球的大ECSA 。