Rhenium (Re), as a promising electrocatalyst with favorable abilities to adsorb/desorb the intermediate species (H*), is desirable for hydrogen evolution reaction (HER) in acidic solution, but the activity of Re remains a bottleneck in alkaline solution due to the weak ability to cleave the OH bonds of H₂O as well as the lack of effective preparation strategies. Herein, an in situ phase separated strategy is developed to fabricate heterostructure rhenium/rhenium disulfide (Re/ReS₂) nanosheet arrays with the characteristics of rich micropore structure, an abundance of metal–support interfaces, interface enrichment of charge, and favorable d-band level. As a result, the Re/ReS₂ heterostructures on 3D carbon cloth show a splendid catalytic performance toward the alkaline HER with an overpotential of 66 mV to achieve a current density of 10 mA cm⁻² and a Tafel slope value of 45.23 mV dec⁻¹, as well as an overpotential of only 145 mV at 200 mA cm⁻². Experimental characterization combined with density functional theory calculations reveal that the excellent catalytic activity originates from the electronic reconfiguration of metal Re induced by strong Re/ReS₂ interface interaction.

中文翻译：

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强金属-载体相互作用引起的金属铼电子重构促进析氢反应

铼（Re）作为一种有前途的电催化剂，具有良好的吸附/解吸中间物种（H*）的能力，是酸性溶液中析氢反应（HER）的理想选择，但由于 Re 的活性仍然是碱性溶液中的瓶颈H ₂ O的 O  H 键断裂能力弱，缺乏有效的制备策略。在这里，开发了一种原位相分离策略来制造异质结构铼/二硫化铼 (Re/ReS ₂ ) 纳米片阵列，具有丰富的微孔结构、丰富的金属-载体界面、电荷界面富集和有利的 d-带级。结果，Re/ReS ₂3D碳布上的异质结构对碱性HER具有出色的催化性能，过电位为66 mV，电流密度为10 mA cm ^-2，塔菲尔斜率值为45.23 mV dec ^-1，过电位仅为在 200 mA cm ^-2时为 145 mV 。结合密度泛函理论计算的实验表征表明，优异的催化活性源于强 Re/ReS ₂界面相互作用引起的金属 Re 的电子重构。