An electrodeposition approach to metal/metal oxide heterostructures for active hydrogen evolution catalysts in near-neutral electrolytes

Michael J. Kenney, Jianan Erick Huang, Yong Zhu, Yongtao Meng, Mingquan Xu, Guanzhou Zhu, Wei Hsuan Hung, Yun Kuang, Mengchang Lin, Xiaoming Sun, Wu Zhou, Hongjie Dai

研究成果: 雜誌貢獻文章同行評審

11 引文 斯高帕斯(Scopus)

摘要

Neutral water splitting is attractive for its use of non-corrosive and environmentally friendly electrolytes. However, catalyst development for hydrogen and oxygen evolution remains a challenge under neutral conditions. Here we report a simple electrodeposition and reductive annealing procedure to produce a highly active Ni-Co-Cr metal/metal oxide heterostructured catalyst directly on Ni foam. The resulting electrocatalyst for hydrogen evolution reaction (HER) requires only 198 mV of overpotential to reach 100 mA/cm 2 in 1 M potassium phosphate (pH = 7.4) and can operate for at least two days without significant performance decay. Scanning transmission electron microscopy coupled with electron energy loss spectroscopy (STEM-EELS) imaging reveals a Ni-Co alloy core decorated with blended oxides layers of NiO, CoO and Cr 2 O 3 . The metal/metal oxide interfaces are suggested to be responsible for the high HER activity. [Figure not available: see fulltext.].
原文英語
期刊Nano Research
DOIs
出版狀態接受/付印 - 2019
對外發佈

ASJC Scopus subject areas

  • 原子與分子物理與光學
  • 材料科學(全部)
  • 凝聚態物理學
  • 電氣與電子工程

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