Design of polymetallic sulfide NiS₂@Co₄S₃@FeS as bifunctional catalyst for high efficiency seawater splitting

Abstract

This work describes the use of NiS2@Co4S3@FeS as a catalyst, which provides a current density of 10 mA cm−2 with a required potential of only 1.587 V, with an emphasis on its remarkable OER selectivity for seawater splitting.

Highly efficient and durable P, Ru–CeO2 self-supporting electrodes toward industrial-level hydrogen production

“…31–34 However, the current densities of most catalysts were generally below 200 mA cm −2 , which is still not comparable to commercial noble metal catalysts and cannot meet the requirements of industrial water electrolysis. 35–37 In addition, the long-term stability is another bottleneck issue for practical electrolysers. The majority of the reported electrocatalysts usually work well only at small current densities (<100 mA cm −2 ) and dilute Cl − concentration (0.5 mmol L −1 ) for several hours (<50 h), which cannot meet the industrial requirements of practical electrolyzers.…”

Hollow Bimetallic Cobalt-Based Selenide Polyhedrons for Efficient Hydrogen Production in Practical PEM Electrolysis

“…Transition metal chalcogenides (TMCs) have gained significant attention as efficient catalysts due to their decent activity, particularly among the various non-noble metal catalysts. − Recently, there has been considerable interest in exploring Ni- or Co-based metal sulfides as potential catalysts for the acidic HER, primarily because of their engineering versatility and cost-effectiveness. Earlier research has indicated that the electrochemical activity of CoSe 2 and NiSe 2 is attributed to the presence of chalcogenide atoms at their edges, similar to what has been observed in MoS 2 .…”