催化作用
材料科学
合金
化学工程
密度泛函理论
溶剂
放热反应
纳米技术
氢
离解(化学)
物理化学
化学
冶金
计算化学
有机化学
工程类
作者
Huan Zhao,Dan Zhang,Yueyue Yuan,Xueke Wu,Shaoxiang Li,Zhenjiang Li,Jianping Lai,Lei Wang
标识
DOI:10.1016/j.apcatb.2021.120916
摘要
It is an insurmountable challenge to synthesize carrier-supported ultra-small immiscible alloy catalyst with simple one-step method today. Here, we creatively report the first preparation of immiscible Ru-based alloys (RuRE-rGO NPs, RE=Gd, Er, Yb, La) with ~5 nm by solvent-free microwave reduction. Additionally, in alkaline electrocatalytic hydrogen evolution reaction (HER), RuGd-rGO NPs performed admirable (η = 12 mV at 10 mA cm−2, TOF=30.6 H2 s−1 at 0.1 V), which also can be stable for 500 h even if it provides industry-related current density of 500 mA cm−2. Density functional theory further indicates that from initial to final state of the reaction, RuGd-rGO NPs have large exothermic energy (−1.34 eV), while the dissociation energy barrier of H2O is relatively low, causing the most likely occurrence of HER. This work provides sufficient space for the synthesis of ultra-small immiscible nano-alloy supported catalysts.
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