Cr and Nd co-doped cobalt oxide for stable proton exchange membrane water electrolysis.
basic_science · Level V
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- Record sourced from PubMed, PMID 41974696.
- Also identified by DOI 10.1038/s41467-026-71066-y.
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Abstract
Developing noble-metal-free electrocatalyst for oxygen evolution reaction in a proton exchange membrane water electrolyzer is a key to sustainable and economical hydrogen production. Herein, we rationally design and develop a chromium and neodymium co-doped cobalt oxide (CrNd-Co<sub>3</sub>O<sub>4</sub>) electrocatalyst that exhibits high activity and durability in the acidic oxygen evolution reaction condition. Furthermore, an in-situ acid circulation strategy is proposed to tackle the ubiquitous issue of membrane poisoning by leached cations in proton exchange membrane water electrolyzers. Consequently, the proton exchange membrane water electrolyzer with CrNd-Co<sub>3</sub>O<sub>4</sub> anode achieves a stable operating current density of 2 amperes per square centimeter at 2.27 volts and 4 amperes per square centimeter at 2.54 volts for 1,000 hours.