Cheng, Peng

Han , Zongsu

Kang , Xinchen

Lv, Kai

Shi, Wei

Wang, Kunyu

Yan, Zheng

Yang, Sihai

Zhang, Xiaoping

Zhou, Zhen

The development of efficient electrocatalysts based on non-noble metals for oxygen evolution reaction (OER) remains an important and challenging task. Multinuclear transition-metalclusters with high structural stability are promising OER catalysts but their catalytic role is poorly understood. Here we report the crystallographic observation of OER activity over robust {Ni12}-clusters immobilised in a porous metal-organic framework, NKU-100, by single-crystal X-ray diffraction as a function of external applied potential. We observed the aggregation of confined oxygen species around the {Ni12}-cluster as a function of applied potential during the electrocatalytic process. The refined occupancy of these oxygen species shows a strong correlation with the variation of current density. This study demonstrates that the enrichment of oxygen species in the secondary coordination sphere of multinuclear transition-metal clusters can promote the OER activity.metal-organic framework, oxygen evolution reaction, secondary coordination sphere, X-ray diffraction, binding sit

The University of Manchester - Institutional Repository

Observation of oxygen evolution over a {Ni12}-cluster-based metal-organic framework

Observation of oxygen evolution over a {Ni12}-cluster-based metal-organic framework

Abstract

Similar works

Full text

Available Versions

The University of Manchester - Institutional Repository