Rh nanoroses for isopropanol oxidation reaction
Rh nanoroses for isopropanol oxidation reaction
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Rh纳米玫瑰用于异丙醇氧化反应
DOI：
10.1016/j.apcatb.2019.118082
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Chen Yu
中科院分区：
文献类型：
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作者：
Xing Shihui;Liu Zhao;Xue Qi;Yin Shiwei;Li Fumin;Cai Weiwei;Li Shuni;Chen Pei;Jin Pujun;Yao Hongchang;Chen Yu
降低醇氧化反应的过电势对于碱性直接醇燃料电池来说是非常理想的，但目前还没有实质性进展。在本研究中，合成了独特的三维自支撑Rh纳米玫瑰并将其应用于异丙醇氧化反应。与传统的Pt黑电催化剂相比，所制备的Rh纳米玫瑰在碱性电解质中的异丙醇氧化反应（IOR）中的起始氧化电位（Δ=0.223V）和峰值电位（Δ=0.435V）均表现出显着的负移，并且在0.3V下的质量活性提高了7.5倍。密度泛函理论计算表明，IOR活性的增强源于Rh表面比Pt表面更高的异丙醇吸附能。由于Rh纳米玫瑰具有无与伦比的活性，这项研究可能为异丙醇氧化反应带来新的广阔前景。
Reducing the overpotential of alcohol oxidation reactions is highly desirable for alkaline direct alcohol fuel cells, but there is still no substantial progress. In this study, unique three-dimensional free-standing Rh nanoroses are synthesized and applied to the isopropanol oxidation reaction. Compared to traditional Pt black electrocatalyst, as-prepared Rh nanoroses exhibit a significant negative shift both in the onset oxidation potential (Δ = 0.223 V) and peak potential (Δ = 0.435 V) as well as 7.5-fold mass activity at 0.3 V for the isopropanol oxidation reaction (IOR) in alkaline electrolyte. The density functional theory calculation indicates the enhanced IOR activity originates form the higher adsorption energy of isopropanol on Rh surface than Pt surface. Since Rh nanoroses have unparalleled activity, this research may bring a new broad of perspective on the isopropanol oxidation reaction.