Volume 57, Issue 15 pp. 4020-4024
Communication

Synthesis of Sub-2 nm Iron-Doped NiSe2 Nanowires and Their Surface-Confined Oxidation for Oxygen Evolution Catalysis

Chao Gu

Chao Gu

Division of Nanomaterials & Chemistry, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence in Nanoscience, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

These authors contributed equally to this work.

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Shaojin Hu

Shaojin Hu

Division of Theoretical and Computational Sciences, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026 China

These authors contributed equally to this work.

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Dr. Xusheng Zheng

Dr. Xusheng Zheng

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 China

These authors contributed equally to this work.

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Prof. Min-Rui Gao

Corresponding Author

Prof. Min-Rui Gao

Division of Nanomaterials & Chemistry, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence in Nanoscience, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Dr. Ya-Rong Zheng

Dr. Ya-Rong Zheng

Division of Nanomaterials & Chemistry, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence in Nanoscience, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Dr. Lei Shi

Dr. Lei Shi

Division of Nanomaterials & Chemistry, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence in Nanoscience, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Dr. Qiang Gao

Dr. Qiang Gao

Division of Nanomaterials & Chemistry, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence in Nanoscience, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Prof. Xiao Zheng

Prof. Xiao Zheng

Division of Theoretical and Computational Sciences, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026 China

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Dr. Wangsheng Chu

Dr. Wangsheng Chu

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 China

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Prof. Hong-Bin Yao

Prof. Hong-Bin Yao

Division of Nanomaterials & Chemistry, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence in Nanoscience, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Prof. Junfa Zhu

Prof. Junfa Zhu

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 China

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Prof. Shu-Hong Yu

Corresponding Author

Prof. Shu-Hong Yu

Division of Nanomaterials & Chemistry, Hefei National Research Centre for Physical Sciences at the Microscale, CAS Centre for Excellence in Nanoscience, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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First published: 14 February 2018
Citations: 152

Graphical Abstract

Down to the wire: Colloidal Fe-doped NiSe2 ultrathin nanowires (UNWs) down to 1.7 nm in diameter were synthesized by a binary soft-template strategy. These UNWs yield surface-confined electrochemical oxidation, enabling efficient and robust oxygen evolution catalysis owing to their favorable electronic structures and unsaturated local coordination environments.

Abstract

Ultrathin nanostructures are attractive for diverse applications owing to their unique properties compared to their bulk materials. Transition-metal chalcogenides are promising electrocatalysts, yet it remains difficult to make ultrathin structures (sub-2 nm), and the realization of their chemical doping is even more challenging. Herein we describe a soft-template mediated colloidal synthesis of Fe-doped NiSe2 ultrathin nanowires (UNWs) with diameter down to 1.7 nm. The synergistic interplay between oleylamine and 1-dodecanethiol is crucial to yield these UNWs. The in situ formed amorphous hydroxide layers that is confined to the surface of the ultrathin scaffolds enable efficient oxygen evolution electrocatalysis. The UNWs exhibit a very low overpotential of 268 mV at 10 mA cm−2 in 0.1 m KOH, as well as remarkable long-term stability, representing one of the most efficient noble-metal-free catalysts.

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