Highly active catalyst derived from a 3D foam of Fe(PO3)2/Ni2P for extremely efficient water oxidation

Haiqing Zhou, Fang Yu, Jingying Sun, Ran He, Shuo Chen, Ching Wu Chu, Zhifeng Ren

研究成果: Article同行評審

288 引文 斯高帕斯(Scopus)

摘要

Commercial hydrogen production by electrocatalytic water splitting will benefit from the realization of more efficient and less expensive catalysts compared with noble metal catalysts, especially for the oxygen evolution reaction, which requires a current density of 500 mA/cm2 at an overpotential below 300 mV with long-term stability. Here we report a robust oxygen-evolving electrocatalyst consisting of ferrous metaphosphate on self-supported conductive nickel foam that is commercially available in large scale. We find that this catalyst, which may be associated with the in situ generated nickel-iron oxide/hydroxide and iron oxyhydroxide catalysts at the surface, yields current densities of 10 mA/cm2 at an overpotential of 177 mV, 500 mA/cm2 at only 265 mV, and 1,705 mA/cm2 at 300 mV, with high durability in alkaline electrolyte of 1 M KOH even after 10,000 cycles, representing activity enhancement by a factor of 49 in boosting water oxidation at 300 mV relative to the state-of-the-art IrO2 catalyst.

原文English
頁(從 - 到)5607-5611
頁數5
期刊Proceedings of the National Academy of Sciences of the United States of America
114
發行號22
DOIs
出版狀態Published - 2017 5月 30

All Science Journal Classification (ASJC) codes

  • 多學科

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