Mesoporous Iron-doped MoS2/CoMo2S4 Heterostructures through Organic-Metal Cooperative Interactions on Spherical Micelles for Electrochemical Water Splitting

Yanna Guo; Jing Tang; Joel Henzie; Bo Jiang; Wei Xia; Tao Chen; Yoshio Bando; Yong-Mook Kang; Md Shahriar A Hossain; Yoshiyuki Sugahara; Yusuke Yamauchi

doi:10.1021/acsnano.9b08904

Mesoporous Iron-doped MoS₂/CoMo₂S₄ Heterostructures through Organic-Metal Cooperative Interactions on Spherical Micelles for Electrochemical Water Splitting

ACS Nano. 2020 Apr 28;14(4):4141-4152. doi: 10.1021/acsnano.9b08904. Epub 2020 Apr 2.

Authors

Yanna Guo¹, Jing Tang², Joel Henzie³, Bo Jiang³, Wei Xia³, Tao Chen⁴, Yoshio Bando³, Yong-Mook Kang⁵, Md Shahriar A Hossain², Yoshiyuki Sugahara¹, Yusuke Yamauchi^{2

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Affiliations

¹ Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
² School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane 4072, QLD, Australia.
³ International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan.
⁴ Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
⁵ Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, Republic of Korea.
⁶ Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
⁷ Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea.

PMID: 32191030
DOI: 10.1021/acsnano.9b08904

Abstract

Mesoporous metal sulfide hybrid (meso-MoS₂/CoMo₂S₄) materials via a soft-templating approach using diblock copolymer polystyrene-block-poly(acrylic acid) micelles are reported. The formation of the meso-MoS₂/CoMo₂S₄ heterostructures is based on the sophisticated coassembly of dithiooxamide and metal precursors (i.e., Co²⁺, PMo₁₂), which are subsequently annealed in nitrogen atmosphere to generate the mesoporous material. Decomposing the polymer leaves behind mesopores throughout the spherical MoS₂/CoMo₂S₄ hybrid particles, generating numerous electrochemical active sites in a network of pores that enable faster charge transfer and mass/gas diffusion that enhance the electrocatalytic performance of MoS₂/CoMo₂S₄. Doping the spherical meso-MoS₂/CoMo₂S₄ heterostructures with iron improves the electronic properties of the hybrid meso-Fe-MoS₂/CoMo₂S₄ material and consequently results in its superior electrochemical activities for both hydrogen evolution reaction and oxygen evolution reaction.

Keywords: Fe-doping; MoS2/CoMo2S4; cooperative interactions; electrochemical water splitting; mesoporous.