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Effect of Support for Non‐Noble NiMo Electrocatalyst in Alkaline Hydrogen Oxidation

Effect of Support for Non‐Noble NiMo Electrocatalyst in Alkaline Hydrogen Oxidation The development of high‐performance platinum group metal (PGM)‐free electrocatalysts for the hydrogen oxidation reaction (HOR) in anion exchange membrane fuel cells (AEMFCs) remains a great challenge. Here, a novel design strategy for improving the catalytic activity of PGM‐free catalysts by adopting N‐doped large‐porous carbon as a support material is reported. This paper shows the effect of support on the activity of non‐noble NiMo in HOR by comparing NiMo alloy on N‐doped mesocellular carbon foam (NiMo/N‐MSUF‐C) with NiMo/MSUF‐C and NiMo on N‐doped CMK‐3 (NiMo/N‐CMK‐3). The strong interaction between NiMo and N species in N‐MSUF‐C alters the electronic structure of NiMo toward optimal binding energies for H and OH. The large pores in N‐MSUF‐C facilitate the diffusion of OH− into the catalyst layer, thereby increasing the limiting current density, which is higher compared with that of NiMo/N‐CMK‐3. The AEMFC with NiMo/N‐MSUF‐C as the anode shows a higher peak power density of 152 mW cm−2 in H2/O2 compared with that of previously reported PGM‐free catalysts. These results can lead to efficient designing of highly effective AEMFCs for practical applications. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advanced Sustainable Systems Wiley

Effect of Support for Non‐Noble NiMo Electrocatalyst in Alkaline Hydrogen Oxidation

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Publisher
Wiley
Copyright
© 2021 Wiley‐VCH GmbH
eISSN
2366-7486
DOI
10.1002/adsu.202100226
Publisher site
See Article on Publisher Site

Abstract

The development of high‐performance platinum group metal (PGM)‐free electrocatalysts for the hydrogen oxidation reaction (HOR) in anion exchange membrane fuel cells (AEMFCs) remains a great challenge. Here, a novel design strategy for improving the catalytic activity of PGM‐free catalysts by adopting N‐doped large‐porous carbon as a support material is reported. This paper shows the effect of support on the activity of non‐noble NiMo in HOR by comparing NiMo alloy on N‐doped mesocellular carbon foam (NiMo/N‐MSUF‐C) with NiMo/MSUF‐C and NiMo on N‐doped CMK‐3 (NiMo/N‐CMK‐3). The strong interaction between NiMo and N species in N‐MSUF‐C alters the electronic structure of NiMo toward optimal binding energies for H and OH. The large pores in N‐MSUF‐C facilitate the diffusion of OH− into the catalyst layer, thereby increasing the limiting current density, which is higher compared with that of NiMo/N‐CMK‐3. The AEMFC with NiMo/N‐MSUF‐C as the anode shows a higher peak power density of 152 mW cm−2 in H2/O2 compared with that of previously reported PGM‐free catalysts. These results can lead to efficient designing of highly effective AEMFCs for practical applications.

Journal

Advanced Sustainable SystemsWiley

Published: Oct 5, 2021

Keywords: anion exchange membrane fuel cells; alkaline hydrogen oxidation; non‐noble metal; support effect

References