journal article·2021-11-22

Electrospinning Preparation of N, P Dual-Doped Molybdenum Carbide/Porous Carbon Fibers with Highly Improved Electrocatalytic Activity for Hydrogen Evolution Reaction

Yuning Zhang, Deyuan Kong, Lili Bo, Wenping Shi, Xiaolin Guan, Yunxia Wang, Zhibin Lei, Jinhui Tong

ACS Applied Energy Materials· Volume 4· Issue 11
Publisher page

Abstract

In this work, N, P dual-doped molybdenum carbide/porous carbon fiber composites were simply fabricated through electrospinning technology, followed by pyrolysis. The obtained samples were composed of N, P-doped MoC, Mo2C, and porous carbon fibers. Compared with each moiety, the composited samples have exhibited greatly improved electrocatalytic activities for hydrogen evolution reaction (HER). As a result, the optimized MoxC-NPC-1.0-800 catalyst exhibits only 125/71 mV of overpotential at 10 mA·cm–2 and superior stability in 0.5 M H2SO4 and 1.0 M KOH, respectively, which outperforms most of the reported analogous catalysts. In addition, a theoretical simulation has confirmed that N, P doping can significantly reduce |ΔGH*| for hydrogen adsorption of MoC and Mo2C and consequently enhance the electrocatalytic activity of the catalysts for HER greatly. This work provides a convenient avenue for fabricating highly efficient composite electrocatalysts of nonmetallic element doped metallic carbide and graphitic carbon.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu730070, China

College of Science, Gansu Agricultural University, Lanzhou, Gansu730070, China

State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu730070, China

Key Laboratory of Applied Surface and Colloid Chemistry, MOE, Shanxi Engineering Lab for Advanced Energy Technology, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shanxi Normal University, Xi’an, Shanxi710119, China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Gansu Province · Innovation Foundation for College and University of Gansu Province

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