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Type: Journal article
Title: Efficient water oxidation with amorphous transition metal boride catalysts synthesized by chemical reduction of metal nitrate salts at room temperature
Author: Yang, Y.
Zhuang, L.
Rufford, T.
Wang, S.
Zhu, Z.
Citation: RSC Advances, 2017; 7(52):32923-32930
Publisher: Royal Society of Chemistry
Issue Date: 2017
ISSN: 2046-2069
Statement of
Yisu Yang, Linzhou Zhuang, Thomas E. Rufford, Shaobin Wang and Zhonghua Zhu
Abstract: We present a variety of amorphous transition-metal borides prepared at room temperature by a chemical reduction method as highly active catalysts for the oxygen evolution reaction (OER). The amorphous borides exhibit activities much higher than the corresponding crystalline (spinel, layered double hydroxide and perovskite) metal oxides containing the identical metal compositions, which have already been regarded as promising OER catalysts. The amorphous Ni/Fe borides showed the best mass normalized OER current density of 50 A g⁻¹ at an overpotential of 0.35 V, transcending the performance of the state-of-the-art OER catalyst, RuO₂. Amorphous transition-metal borides demonstrated extremely high active OER catalytic activity. The outstanding catalytic activity can be attributed to the amorphous structure, the large specific surface areas (above 110 m² g⁻¹) and the electron-enriched transition metal sites stemming from boron doping. The stoichiometry of the catalysts can be controlled precisely even for the synthesis of quaternary metal boride catalysts, which made it feasible to further optimize the catalytic activity. These results indicated that it is facile to prepare highly active OER catalysts by the one-step chemical reduction process at room temperature.
Description: Published on 28 June 2017
Rights: This journal is © The Royal Society of Chemistry 2017. Open Access Article. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
RMID: 0030096539
DOI: 10.1039/c7ra02558k
Grant ID:
Appears in Collections:Chemical Engineering publications

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