Leveraging bifunctional phosphide-based catalysts in a membrane-electrode-assembly to achieve industrial hydrogen production

Wen Jing Zeng, Jian Jie Ma, Wen Yang Huang, Tsung Ju Lee, Zih Yi Lin, Kang Shun Peng, Nozomu Hiraoka, Yen Fa Liao, Ying Rui Lu, Chih Wei Hu*, Shao Hui Hsu*, Sung Fu Hung*

*此作品的通信作者

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

The advancement of the hydrogen economy hinges upon the development of clean, cost-effective, and highly efficient hydrogen generators capable of industrial-scale operation. Conventional electrolyzers encounter challenges such as high internal resistance and low current density, which restrict their practical applicability. In this study, we present a cost-effective bifunctional CoFeP electrocatalyst wherein the regulation of cobalt 3d orbitals by iron dopants enhances overall catalytic activity. High-energy-resolution fluorescence-detection X-ray absorption spectroscopy and 1s3p resonant inelastic X-ray scattering confirm a downward shift and delocalization of cobalt ion 3d orbitals. Employed within a membrane-electrode assembly (MEA) system, CoFeP demonstrates voltages of 1.51 V at 10 mA cm−2, 1.65 V at 100 mA cm−2 and 2.11 V at 500 mA cm−2 without iR-correction. These values are significantly lower by 109 mV and 470 mV than those recorded at 100 mA cm−2 (1.62 V) and 500 mA cm−2 (2.71 V), respectively, in a conventional H-cell system. Within the MEA system, CoFeP achieves a Faradaic efficiency exceeding 97% for hydrogen production and sustains stable catalytic for 350 h, underscoring its potential for industrial-scale hydrogen production.

原文English
文章編號100820
期刊Materials Today Sustainability
27
DOIs
出版狀態Published - 9月 2024

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