Electronic modulation of NiS-PBA/CNT with boosted water oxidation performance realized by a rapid microwave-assisted in-situ partial sulfidation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Bin Wang
  • Xinqiang Wang
  • Zegao Wang
  • Katam Srinivas
  • Xiaojuan Zhang
  • Bo Yu
  • Dongxu Yang
  • Wanli Zhang
  • Yuanfu Chen

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number130481
Journal / PublicationChemical Engineering Journal
Volume420
Online published24 May 2021
Publication statusPublished - 15 Sep 2021

Abstract

Hydrogen is considered as the promising renewable resources in future C-free systems, but more efficient and scalable synthesis is required to enable its widespread deployment. Here, in-situ generated hierarchical NiS-PBA/CNT hybrid has been fabricated which combined the high conductivity and electrocatalytic activity together. Through study the electronic structure, it was found that the electron transfer among metal atom enable higher activity. The optimized NiS-PBA/CNT delivers an ultralow overpotential of 253 mV @ 20 mA cm−2, a small Tafel slope of 49.8 mV dec-1, and can work steadily for more than 40 h with a Faradic efficiency of 95.5%. Density functional theory calculations based on the NiS-PBA, NiS and PBA model reveal that the enhanced catalytic activities of NiS-PBA is mainly manifested in its lower free energy of rate-determining step (the oxidation of *OH to *O) and higher electrical conductivity. This work provides a novel partial sulfidation strategy for PBA to significantly boost catalytic performance. And the microwave-assisted solvothermal reaction offers a novel mild implementation toward in situ heterogeneous doping for carbon matrix.

Research Area(s)

  • DFT calculations, Electrocatalytic OER, Electronic modulation, Microwave-assisted reaction, Partial sulfidation

Citation Format(s)

Electronic modulation of NiS-PBA/CNT with boosted water oxidation performance realized by a rapid microwave-assisted in-situ partial sulfidation. / Wang, Bin; Wang, Xinqiang; Wang, Zegao; Srinivas, Katam; Zhang, Xiaojuan; Yu, Bo; Yang, Dongxu; Zhang, Wanli; Lau, Tai-Chu; Chen, Yuanfu.

In: Chemical Engineering Journal, Vol. 420, 130481, 15.09.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review