Cathode passivation suppression enables ultrastable industry-leading alkaline water electrolysis at hundred-ampere currents
Yang Wu, Zhenhui Kou, Nengji Liu, Senlin Chu, Bin Yang, Zhongjian Li, Juan Shang, Fei Song, Qinghua Zhang, Peng Liao, Youxiao Chen, Lei Li, Yang Hou
Abstract
Ru nanoparticles reconstruct water networks on RANEY® Ni, decreasing local pH near cathode to inhibit passivation. The cathode achieves 10 A cm −2 at 2.3 V with 2500 hours stability at 1.0 A cm −2 .
Topics & Concepts
CathodeMaterials sciencePassivationElectrolysisElectrodeChemical engineeringNanoparticleAlkaline batteryInorganic chemistryChemistryAlkaline water electrolysisCurrent (fluid)ElectrochemistryAnalytical Chemistry (journal)Current densityElectrolysis of waterOptoelectronicsElectrocatalysts for Energy ConversionAmmonia Synthesis and Nitrogen ReductionEnvironmental remediation with nanomaterials