电催化剂
表面改性
析氧
螺旋烯
催化作用
材料科学
分子
电化学
组合化学
电极
纳米技术
化学
化学工程
化学物理
有机化学
物理化学
工程类
作者
Yunchang Liang,Karla Banjac,Kévin Martin,Nicolas Zigon,Seung-Hwa Lee,Nicolas Vanthuyne,Felipe A. Garcés-Pineda,José Ramón Galán-Mascarós,Xile Hu,Narcis Avarvari,Magalí Lingenfelder
标识
DOI:10.1038/s41467-022-31096-8
摘要
A sustainable future requires highly efficient energy conversion and storage processes, where electrocatalysis plays a crucial role. The activity of an electrocatalyst is governed by the binding energy towards the reaction intermediates, while the scaling relationships prevent the improvement of a catalytic system over its volcano-plot limits. To overcome these limitations, unconventional methods that are not fully determined by the surface binding energy can be helpful. Here, we use organic chiral molecules, i.e., hetero-helicenes such as thiadiazole-[7]helicene and bis(thiadiazole)-[8]helicene, to boost the oxygen evolution reaction (OER) by up to ca. 130 % (at the potential of 1.65 V vs. RHE) at state-of-the-art 2D Ni- and NiFe-based catalysts via a spin-polarization mechanism. Our results show that chiral molecule-functionalization is able to increase the OER activity of catalysts beyond the volcano limits. A guideline for optimizing the catalytic activity via chiral molecular functionalization of hybrid 2D electrodes is given.
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