Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 294, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120246
Keywords
Electrocatalyst; Alkaline water electrolysis; Anion exchange membrane water electrolysis; Hydrogen production
Funding
- Basic Science Research Program through the National Research Foundation (NRF) of Korea - Ministry of Science, ICT & Future Planning [2015R1A2A2A01006325, 2019R1A2C2006997]
- Creative Materials Discovery Program through the National Research Foundation (NRF) of Korea - Ministry of Science, ICT & Future Planning [NRF-2019M3D1A1079303]
- National Research Foundation of Korea [2019R1A2C2006997] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Developing high-efficiency and cost-efficient electrodes for hydrogen and oxygen evolution reactions is a major challenge in water electrolysis technology. A chemical transformation route was developed to produce high-performance OER and HER electrodes, which outperformed most other catalysts reported to date. An alkaline water electrolyzer based on these electrodes achieved a current density of 10 mA/cm(2) at an only 1.47 V-cell, while an anion exchange membrane water electrolyzer reached a current density of 500 mA/cm(2) at an only 1.75 V-cell.
Developing high-efficiency and cost-efficient electrodes for hydrogen and oxygen evolution reactions (HER and OER respectively) is a major challenge in water electrolysis technology. We developed a chemical transformation route that can produce both high-performance OER and HER electrodes by corrosion of a Ni foam and subsequent phosphidation process, which generated ternary NiFeCo layered double hydroxide (LDH) and phosphide nanosheets supported on the foam, respectively. Because of their compositions and high electrical conductivities, these ternary LDH and phosphide electrodes exhibited remarkably high activities for OER and HER, respectively, outperforming most of other catalysts reported to date. An alkaline water electrolyzer based on these electrodes achieved a current density of 10 mA/cm(2) at an only 1.47 V-cell. In addition, anion exchange membrane water electrolyzer based on these electrodes reached a current density of 500 mA/cm(2) at an only 1.75 V-cell.
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