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Issue 20, 2020
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Development of core–shell structured Mo2C@BN as novel microwave catalysts for highly effective direct decomposition of H2S into H2 and S at low temperature

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Abstract

Direct decomposition of hydrogen sulfide is an attractive approach for producing COx-free H2 and S from a toxic and abundant waste gas. However, the direct decomposition of H2S into H2 and S with high efficiency at low temperature remains a challenge, due to the thermodynamic equilibrium constraints. Herein, we developed core–shell structured Mo2C@BN as novel microwave catalysts for highly effective direct decomposition of H2S into H2 and S. Interestingly, the calcination temperature of the Mo2C@BN microwave catalysts has a great influence on the catalytic performance. Importantly, the Mo2C@BN-1000 catalyst displays high catalytic activity at low temperature in the microwave catalytic reaction mode with the H2S conversion impressively reaching up to 99.9% at 650 °C, which remarkably surpasses the corresponding H2S equilibrium conversion in the conventional reaction mode. This indicates that the equilibrium of direct H2S decomposition is broken in the microwave catalytic reaction mode, which shows the microwave selective catalytic effect. This work provides an alternative avenue for the high value utilization of toxic and abundant H2S resources, and opens a novel approach for highly effective direct decomposition of H2S into COx-free H2 and S at low temperature.

Graphical abstract: Development of core–shell structured Mo2C@BN as novel microwave catalysts for highly effective direct decomposition of H2S into H2 and S at low temperature

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Article information


Submitted
07 Jun 2020
Accepted
19 Jul 2020
First published
10 Aug 2020

Catal. Sci. Technol., 2020,10, 6769-6779
Article type
Paper

Development of core–shell structured Mo2C@BN as novel microwave catalysts for highly effective direct decomposition of H2S into H2 and S at low temperature

J. Zhu, W. Xu, J. Chen, Z. Gan, X. Wang and J. Zhou, Catal. Sci. Technol., 2020, 10, 6769
DOI: 10.1039/D0CY01145B

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