MOF-Derived Zn-Doped CoSe2 as an Efficient and Stable Free-Standing Catalyst for Oxygen Evolution Reaction

Qiuchun Dong; Qian Wang; Ziyang Dai; Huajun Qiu; Xiaochen Dong

doi:10.1021/acsami.6b10160

MOF-Derived Zn-Doped CoSe₂ as an Efficient and Stable Free-Standing Catalyst for Oxygen Evolution Reaction

ACS Appl Mater Interfaces. 2016 Oct 12;8(40):26902-26907. doi: 10.1021/acsami.6b10160. Epub 2016 Sep 28.

Authors

Qiuchun Dong¹, Qian Wang¹, Ziyang Dai¹, Huajun Qiu², Xiaochen Dong¹

Affiliations

¹ Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211816, China.
² School of Chemistry and Chemical Engineering, Chongqing University , Chongqing 400044, China.

PMID: 27642808
DOI: 10.1021/acsami.6b10160

Abstract

Developing highly active electrocatalysts with low cost and high efficiency for oxygen evolution reactions (OER) is important for the practical implementations of hydrogen energy. Here, we report a Zn-doped CoSe₂ nanosheets grown on free-standing carbon fabric collector (CFC), which was synthesized by using a metal-organic framework (MOF) as precursor and followed by a selenylation process. Importantly, the Zn-doped CoSe₂/CFC electrode exhibited an obviously enhanced catalytic activity for OER in 1 M KOH aqueous solution compared with CoSe₂/CFC, showing a small overpotential of 356 mV for a current density of 10 mA cm^-2, a small Tafel slope of 88 mV dec^-1, and an excellent stability. The robust and free-standing electrode shows great potential as an economic catalyst for OER applications.

Keywords: CoSe2; MOF derivative; atomic doping; free-standing; water splitting.