Heterostructured NiFe oxide/phosphide nanoflakes for efficient water oxidation

Ailing Yan; Hao Wan; Gen Chen; Ning Zhang; Wei Ma; Xiaohe Liu; Yijun Cao; Renzhi Ma

doi:10.1039/c9dt01275c

Heterostructured NiFe oxide/phosphide nanoflakes for efficient water oxidation

Dalton Trans. 2019 Jun 21;48(23):8442-8448. doi: 10.1039/c9dt01275c. Epub 2019 May 22.

Authors

Ailing Yan¹, Hao Wan¹, Gen Chen¹, Ning Zhang¹, Wei Ma², Xiaohe Liu¹, Yijun Cao², Renzhi Ma³

Affiliations

¹ State Key Laboratory of Powder Metallurgy and School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, P. R. China. liuxh@csu.edu.cn.
² Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China. yijuncao@126.com.
³ International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.

PMID: 31116198
DOI: 10.1039/c9dt01275c

Abstract

To realise the gradual replacement of noble metal-based materials for electrocatalytic energy conversion, numerous studies need to be focused on the compounds based on inexpensive 3d transition metals (such as Fe and Co). For achieving energetic electrocatalysis, elaborately designed nanostructures are urgently desired. Here, we reported a facile approach for the preparation of a NiFe oxide/phosphide (Ni_2/3Fe_1/3O/Ni_4/3Fe_2/3P) heterostructure with a 2-dimensional (2D) nanoflake-like morphology. Based on the combined advantages of composition and structure, the 2D Ni_2/3Fe_1/3O/Ni_4/3Fe_2/3P nanoflakes were characterized to exhibit a high activity for the electrocatalytic water oxidation, surpassing that of individual Ni_2/3Fe_1/3O or Ni_4/3Fe_2/3P nanoplates. This result may offer a great possibility of delicatedly designing nanostructures for highly efficient electrochemical energy conversion.