Nickel–molybdenum–niobium metallic glass for efficient hydrogen oxidation in hydroxide exchange membrane fuel cells

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Fei-Yue Gao
  • Si-Nan Liu
  • Jia-Cheng Ge
  • Xiao-Long Zhang
  • Li Zhu
  • Ya-Rong Zheng
  • Yu Duan
  • Shuai Qin
  • Xingxing Yu
  • Rui-Cheng Bao
  • Peng-Peng Yang
  • Zhuang-Zhuang Niu
  • Zhi-Gang Ding
  • Wei Liu
  • Si Lan
  • Min-Rui Gao
  • Yushan Yan
  • Shu-Hong Yu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)993–1005
Journal / PublicationNature Catalysis
Volume5
Issue number11
Online published27 Oct 2022
Publication statusPublished - Nov 2022

Abstract

The cost of fuel cell systems can be largely reduced by developing hydroxide exchange membrane fuel cells (HEMFCs) based on platinum group metal-free (PGM-free) catalysts. However, the sluggish hydrogen oxidation reaction (HOR) in alkaline electrolytes forces HEMFCs to use higher PGM loadings at the anode than proton exchange membrane fuel cells to sustain the desired power densities. Here we report nickel–molybdenum–niobium metallic glasses as PGM-free HOR catalysts. The optimal Ni52Mo13Nb35 metallic glass exhibits an intrinsic exchange current density of 0.35 mA cm−2, outperforming that of a Pt disk catalyst (0.30 mA cm−2). This catalyst also shows remarkable robustness in alkaline electrolyte with a wide stability window up to 0.8 V versus the reversible hydrogen electrode. When used as the anode, this catalyst enables power densities of 390 mW cm−2 in H2/O2 fuel cells and 253 mW cm−2 in H2/air fuel cells, and shows negligible performance degradation over 50 h and 30 h, respectively. [Figure not available: see fulltext.].

Citation Format(s)

Nickel–molybdenum–niobium metallic glass for efficient hydrogen oxidation in hydroxide exchange membrane fuel cells. / Gao, Fei-Yue; Liu, Si-Nan; Ge, Jia-Cheng et al.
In: Nature Catalysis, Vol. 5, No. 11, 11.2022, p. 993–1005.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review