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Title: Ultrafine Pt Nanoparticle-Decorated Pyrite-Type CoS 2 Nanosheet Arrays Coated on Carbon Cloth as a Bifunctional Electrode for Overall Water Splitting

Abstract

To improve the utilization efficiency of precious metals, metal-supported materials provide a direction for fabricating highly active and stable heterogeneous catalysts. Here, carbon cloth (CC)-supported Earth-abundant CoS2 nanosheet arrays (CoS2/CC) are presented as ideal substrates for ultrafine Pt deposition (Pt-CoS2/CC) to achieve remarkable performance toward the hydrogen and oxygen evolution reactions (HER/OER) in alkaline solutions. Notably, the Pt-CoS2/CC hybrid delivers an overpotential of 24 mV at 10 mA cm–2 and a mass activity of 3.89 A Ptmg–1, which is 4.7 times higher than that of commercial Pt/C, at an overpotential of 130 mV for catalyzing the HER. An alkali-electrolyzer using Pt-CoS2/CC as a bifunctional electrode enables a water-splitting current density of 10 mA cm–2 at a low voltage of 1.55 V and can sustain for more than 20 h, which is superior to that of the state-of-the-art Pt/C+RuO2 catalyst. Further experimental and theoretical simulation studies demonstrate that strong electronic interaction between Pt and CoS2 synergistically optimize hydrogen adsorption/desorption behaviors and facilitate the in situ generation of OER active species, enhancing the overall water-splitting performance. This research highlights the regulation of interfacial and electronic synergy in pursuit of highly efficient and durable supported catalysts for hydrogen and oxygen electrocatalytic applications.

Authors:
 [1];  [1];  [1];  [2];  [3]; ORCiD logo [1];  [1]
  1. Tianjin Univ. (China)
  2. Shandong Univ., Jinan (China)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Natural Science Foundation of China (NSFC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1526674
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 24; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; active sites; nanocomposite; Pt nanoparticles; pyrite CoS2; water splitting

Citation Formats

Han, Xiaopeng, Wu, Xiaoyu, Deng, Yida, Liu, Jian, Lu, Jun, Zhong, Cheng, and Hu, Wenbin. Ultrafine Pt Nanoparticle-Decorated Pyrite-Type CoS 2 Nanosheet Arrays Coated on Carbon Cloth as a Bifunctional Electrode for Overall Water Splitting. United States: N. p., 2018. Web. doi:10.1002/aenm.201800935.
Han, Xiaopeng, Wu, Xiaoyu, Deng, Yida, Liu, Jian, Lu, Jun, Zhong, Cheng, & Hu, Wenbin. Ultrafine Pt Nanoparticle-Decorated Pyrite-Type CoS 2 Nanosheet Arrays Coated on Carbon Cloth as a Bifunctional Electrode for Overall Water Splitting. United States. https://doi.org/10.1002/aenm.201800935
Han, Xiaopeng, Wu, Xiaoyu, Deng, Yida, Liu, Jian, Lu, Jun, Zhong, Cheng, and Hu, Wenbin. 2018. "Ultrafine Pt Nanoparticle-Decorated Pyrite-Type CoS 2 Nanosheet Arrays Coated on Carbon Cloth as a Bifunctional Electrode for Overall Water Splitting". United States. https://doi.org/10.1002/aenm.201800935. https://www.osti.gov/servlets/purl/1526674.
@article{osti_1526674,
title = {Ultrafine Pt Nanoparticle-Decorated Pyrite-Type CoS 2 Nanosheet Arrays Coated on Carbon Cloth as a Bifunctional Electrode for Overall Water Splitting},
author = {Han, Xiaopeng and Wu, Xiaoyu and Deng, Yida and Liu, Jian and Lu, Jun and Zhong, Cheng and Hu, Wenbin},
abstractNote = {To improve the utilization efficiency of precious metals, metal-supported materials provide a direction for fabricating highly active and stable heterogeneous catalysts. Here, carbon cloth (CC)-supported Earth-abundant CoS2 nanosheet arrays (CoS2/CC) are presented as ideal substrates for ultrafine Pt deposition (Pt-CoS2/CC) to achieve remarkable performance toward the hydrogen and oxygen evolution reactions (HER/OER) in alkaline solutions. Notably, the Pt-CoS2/CC hybrid delivers an overpotential of 24 mV at 10 mA cm–2 and a mass activity of 3.89 A Ptmg–1, which is 4.7 times higher than that of commercial Pt/C, at an overpotential of 130 mV for catalyzing the HER. An alkali-electrolyzer using Pt-CoS2/CC as a bifunctional electrode enables a water-splitting current density of 10 mA cm–2 at a low voltage of 1.55 V and can sustain for more than 20 h, which is superior to that of the state-of-the-art Pt/C+RuO2 catalyst. Further experimental and theoretical simulation studies demonstrate that strong electronic interaction between Pt and CoS2 synergistically optimize hydrogen adsorption/desorption behaviors and facilitate the in situ generation of OER active species, enhancing the overall water-splitting performance. This research highlights the regulation of interfacial and electronic synergy in pursuit of highly efficient and durable supported catalysts for hydrogen and oxygen electrocatalytic applications.},
doi = {10.1002/aenm.201800935},
url = {https://www.osti.gov/biblio/1526674}, journal = {Advanced Energy Materials},
issn = {1614-6832},
number = 24,
volume = 8,
place = {United States},
year = {Mon Jul 02 00:00:00 EDT 2018},
month = {Mon Jul 02 00:00:00 EDT 2018}
}

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