析氧
氧气
化学工程
分解水
材料科学
氢
纳米技术
制氢
化学
化学物理
光化学
催化作用
物理化学
电化学
电极
有机化学
工程类
光催化
作者
Abdulwahab Salah,Hong‐Da Ren,Nabilah Al‐Ansi,Adel Al‐Salihy,Samah A. Mahyoub,Fahim A. Qaraah,Abdo Hezam,Q.A. Drmosh
标识
DOI:10.1002/cssc.202401862
摘要
Abstract Zeolitic imidazolate frameworks (ZIFs) are commonly used to create complex hollow structures for energy applications. This study presents a simple method to produce a novel hollow nanoprism Co@C hierarchical composite from ZIF‐67 through high‐temperature treatment at 800 °C. This composite serves as a platform for Ru nanoparticle deposition, forming RuCo@C hollow nanoprism (RuCo@C HNP). As an electrocatalyst in 1 M KOH, RuCo@C HNP exhibits excellent hydrogen evolution reaction (HER) performance, with a low overpotential of 32 mV to reach 10 mA cm −2 , a Tafel slope of 39.67 mV dec −1 , a high turnover frequency (TOF) of 3.83 s −1 at η 200 , and stable performance over 50 h. It also achieves a low η 10 of 266 mV for the oxygen evolution reaction (OER) with a Tafel slope of 45.22 mV dec −1 . Density functional theory (DFT) calculations reveal that Ru doping in Ni/Co maintains a low water dissociation barrier, reduces the energy barrier for the OER rate‐determining step, and creates active sites for H*, enhancing adsorption/desorption abilities. These results are attributed to the synergy between Co and Ru and the hollow prism structure′s increased surface area. This method for synthesizing hollow structures using ZIF composites shows promise for applications in the energy sector.
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