Hydrogen evolution reaction (HER) is regarded as a feasible strategy for producing high-purity hydrogen from abundant water. It is significant yet challenging for synthesis of Pt-based pH-universal HER electrocatalysts by substantially reducing the Pt loading without any decay in the activity. Herein, bimetallic PtRh alloyed dendritic nanoassemblies (DNAs) were efficiently prepared by a facile one-pot solvothermal strategy in oleylamine (OAm), coupling with the aid of glycine and cetyltrimethylammonium chloride (CTAC). By virtue of the unique branch-like structures and compositions advantages, the PtRh DNAs catalyst showed steeply enhanced HER activity with small overpotentials (i.e. 28 mV in 1.0 M KOH, 23 mV in 1.0 M phosphate buffer solution and 27 mV in 0.5 M H₂SO₄) at the current density of 10 mA cm⁻², surpassing those of commercial Pt/C under such conditions. This work provides a facile and rational strategy to construct advanced Pt-based bimetallic electrocatalyst for energy-correlated applications.

氢气析出反应（HER）被认为是从丰富的水中生产高纯度氢气的可行策略。通过显着降低Pt负载而活性没有任何下降，合成基于Pt的pH通用的HER电催化剂是重要的但又具有挑战性。在这里，双金属PtRh合金树突状纳米组件（DNAs）是通过在甘胺酸和十六烷基三甲基氯化铵（CTAC）的帮助下，在油胺（OAm）中通过简便的一锅溶剂热法有效制备的。凭借独特的分支状结构和组成优势，PtRh DNAs催化剂具有显着增强的HER活性，并具有较小的超电势（即1.0 M KOH中的28 mV，1.0 M磷酸盐缓冲溶液中的23 mV和0.5 M H ₂ SO中的27 mV ₄）在10 mA cm ^-2的电流密度下，在这种条件下超过了商用Pt / C。这项工作为构建用于能源相关应用的先进的Pt基双金属电催化剂提供了一种简便合理的策略。