TU Darmstadt / ULB / TUbiblio

Enhanced hydrogen evolution reaction catalyzed by carbon‐rich Mo4.8Si3C0.6/C/SiC nanocomposites via a PDC approach

Feng, Yao and Yu, Zhaoju and Riedel, Ralf (2020):
Enhanced hydrogen evolution reaction catalyzed by carbon‐rich Mo4.8Si3C0.6/C/SiC nanocomposites via a PDC approach.
103, In: Journal of the American Ceramic Society, 2020 (2), pp. 1385-1395. Wiley, ISSN 0002-7820, e-ISSN 1551-2916,
DOI: 10.1111/jace.16824,
[Article]

Abstract

In this study, mesoporous carbon‐rich Mo4.8Si3C0.6/C/SiC ceramic nanocomposites were successfully prepared via a single‐source precursor route, starting from allylhydridopolycarbosilane (AHPCS, SMP‐10), bis(acetylacetonato) dioxomolybdenum (VI) [MoO2(acac)2], and divinylbenzene (DVB). Besides, polystyrene (PS) was used as a pore former. The obtained carbon‐rich single‐source precursor/PS mixtures were pyrolyzed at 1100°C, and then annealed at 1350°C‐1600°C to fabricate a series of carbon‐rich Mo4.8Si3C0.6/C/SiC ceramics comprised of high carbon content above 50 wt%. In comparison to the carbon‐poor materials, the carbon‐rich samples retain the higher specific surface area up to 214.6‐304 m2/g at higher annealing temperatures (1350°C‐1600°C) due to the enhancement of carbothermal reaction. The carbon‐rich samples synthesized at 1500°C, denoted as SM/Mo/PS/DVB 2‐1‐4‐2 1500 exhibit enhanced electrocatalytic performance with ultra‐low overpotentials of 119 mV vs reversible hydrogen electrode at a current density of 10 mA cm−2 in acidic media, which is superior to that of the Mo4.8Si3C0.6/C/SiC ceramic (138 mV) with lower carbon content reported in our previous study. Therefore, our porous materials comprised of high carbon content and Nowotny phase (Mo4.8Si3C0.6, NP) are considered as promising catalysts for the hydrogen evolution reaction (HER).

Item Type: Article
Erschienen: 2020
Creators: Feng, Yao and Yu, Zhaoju and Riedel, Ralf
Title: Enhanced hydrogen evolution reaction catalyzed by carbon‐rich Mo4.8Si3C0.6/C/SiC nanocomposites via a PDC approach
Language: English
Abstract:

In this study, mesoporous carbon‐rich Mo4.8Si3C0.6/C/SiC ceramic nanocomposites were successfully prepared via a single‐source precursor route, starting from allylhydridopolycarbosilane (AHPCS, SMP‐10), bis(acetylacetonato) dioxomolybdenum (VI) [MoO2(acac)2], and divinylbenzene (DVB). Besides, polystyrene (PS) was used as a pore former. The obtained carbon‐rich single‐source precursor/PS mixtures were pyrolyzed at 1100°C, and then annealed at 1350°C‐1600°C to fabricate a series of carbon‐rich Mo4.8Si3C0.6/C/SiC ceramics comprised of high carbon content above 50 wt%. In comparison to the carbon‐poor materials, the carbon‐rich samples retain the higher specific surface area up to 214.6‐304 m2/g at higher annealing temperatures (1350°C‐1600°C) due to the enhancement of carbothermal reaction. The carbon‐rich samples synthesized at 1500°C, denoted as SM/Mo/PS/DVB 2‐1‐4‐2 1500 exhibit enhanced electrocatalytic performance with ultra‐low overpotentials of 119 mV vs reversible hydrogen electrode at a current density of 10 mA cm−2 in acidic media, which is superior to that of the Mo4.8Si3C0.6/C/SiC ceramic (138 mV) with lower carbon content reported in our previous study. Therefore, our porous materials comprised of high carbon content and Nowotny phase (Mo4.8Si3C0.6, NP) are considered as promising catalysts for the hydrogen evolution reaction (HER).

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 103
Journal volume: 2020
Number: 2
Publisher: Wiley
Uncontrolled Keywords: Carbon-rich ceramic nanocomposites; high BET surface area; hydrogen evolution reaction; nowotny phase; molybdenum-carbide; electrical-conductivity efficient; electrocatalyst; highly efficient; cross-linking; ceramics; graphene; nanoparticles; polycarbosilane; water
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 19 Dec 2019 09:07
DOI: 10.1111/jace.16824
Official URL: https://doi.org/10.1111/jace.16824
Projects: Alexander von Humboldt‐Stiftung, China Scholarship Council. Grant Number: 201606310021, National Natural Science Foundation of China. Grant Number: 51872246
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details