The development of high-performance electrodes for hydrogen evolution reaction (HER) is essential for commercialization of water electrolyzers. Among the promising candidate for HER catalyst, Re and its oxide display an optimal hydrogen binding energy to that of Pt. Nevertheless, only a few studies have reported the acidic HER catalysts with the high overpotentials (>100 mV at –10 mA cm^–2). Furthermore, Re transition metal alloy for the acidic HER catalyst have rarely been reported. Herein, we report a CoRe alloy catalyst for the acidic HER, which was fabricated by electrodeposition on carbon paper (CP) by controlling the electrodeposition. The optimized CoRe/CP electrode exhibited a higher HER activity than those of the other Re-based catalysts with an overpotential of 45.1 mV at −10 mA cm^–2. The activation energy for the HER of CoRe/CP, which was calculated from the Arrhenius plot, demonstrated a lower value of 8.99 kJ mol^–1 K^–1.

用于氢析出反应（HER）的高性能电极的开发对于水电解器的商业化至关重要。在HER催化剂的有希望的候选物中，Re及其氧化物显示出与Pt相比最佳的氢结合能。然而，只有少数研究报道了酸性HER催化剂具有较高的超电势（在–10 mA cm ^–2时> 100 mV ）。此外，很少有人报道用于酸性HER催化剂的Re过渡金属合金。本文中，我们报告了一种用于酸性HER的CoRe合金催化剂，该催化剂通过控制电沉积在复写纸（CP）上电沉积而制得。经过优化的CoRe / CP电极表现出比其他基于Re的催化剂更高的HER活性，在-10 mA cm ^–2时的超电势为45.1 mV。根据Arrhenius图计算得出的CoRe / CP的HER活化能较低，为8.99 kJ mol ^–1  K ^–1。