"Single-source-precursor synthesis of porous W-containing SiC-based nan" by Zhaoju YU, Kangwei MAO et al.

Article Title

Single-source-precursor synthesis of porous W-containing SiC-based nanocomposites as hydrogen evolution reaction electrocatalysts

Authors

Zhaoju YU, College of Materials, Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen 361005, China
Kangwei MAO, College of Materials, Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen 361005, China
Yao FENG, Technische Universität Darmstadt, Institut für Materialwissenschaft, Otto-Berndt-Straße 3, D-64287, Darmstadt, Germany;College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China

Keywords

single-source-precursor, W-containing phase, SiC-based nanocomposites, electrocatalyst, hydrogen evolution reaction

Abstract

In this paper, W-containing SiC-based ceramic nanocomposites were successfully prepared by a polymer-derived ceramic approach using allylhydridopolycarbosilane (AHPCS) as a SiC source, WCl₆ as a tungsten source, polystyrene (PS) as a pore forming agent as well as divinyl benzene (DVB) as a carbon rich source. High-temperature phase behavior of the W-containing SiC-based ceramics after heat treatment was studied, showing that excessive DVB content in the feed will inhibit the crystallinity of W-containing nanoparticles in the final ceramic nanocomposites. The high specific surface area (SSA) of 169.4-276.9 m²/g can be maintained even at high temperature in the range of 1400-1500 ℃, due to the carbothermal reaction which usually occurs between 1300 and 1400 ℃. All prepared W-containing SiC-based nanocomposites reveal electrocatalytic activity for the hydrogen evolution reaction (HER). In detail, compared with reversible hydrogen electrode (RHE), the ceramic sample PWA-2-1300 after heat treatment at 1300 ℃ has the smallest overpotential of 286 mV when the current density is 10 mA·cm^-2 in acid medium, indicating the promising perspective in the water splitting field.

Recommended Citation

YU, Zhaoju; MAO, Kangwei; and FENG, Yao (2021) "Single-source-precursor synthesis of porous W-containing SiC-based nanocomposites as hydrogen evolution reaction electrocatalysts," Journal of Advanced Ceramics: Vol. 10: Iss. 6, Article 9.
DOI: https://doi.org/10.1007/s40145-021-0508-8
Available at: https://dc.tsinghuajournals.com/journal-of-advanced-ceramics/vol10/iss6/9

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