The development of efficient electrochemical seawater splitting catalysts for large-scale hydrogen production is of great importance. In this work, we report an amorphous Co-Mo-B film on Ni foam (Co-Mo-B/NF) via a facile one-step electrodeposition process. Such amorphous Co-Mo-B/NF possesses superior activity with a small overpotential of 199 mV at 100 mA cm−2 for a hydrogen evolution reaction in alkaline seawater. Notably, Co-Mo-B/NF also maintains excellent stability for at least 24 h under alkaline seawater electrolysis.
Electrochemical reduction of nitrite (NO2−) is considered as an eco-friendly and sustainable strategy for the simultaneous NH3 production and NO2− removal. However, electroreduction of NO2− is a complex reaction involving...
Electrochemical nitrite (NO 2 − ) reduction is recognized as a promising strategy for synthesizing valuable ammonia (NH 3 ) and degrading NO 2 − pollutants in wastewater. The six-electron process for the NO 2 − reduction reaction is complex and necessitates a highly selective and stable electrocatalyst for efficient conversion of NO 2 − to NH 3 . Herein, a FeP nanoparticledecorated TiO 2 nanoribbon array on a titanium plate (FeP@TiO 2 /TP) is proposed as an efficient catalyst for NH 3 production under ambient conditions. In 0.1 M NaOH with 0.1 M NO 2 − , such a FeP@TiO 2 /TP affords a large NH 3 yield of 346.6 μmol h −1 cm −2 and a high Faradaic efficiency of 97.1%. Additionally, it demonstrates excellent stability and durability during long-term cycling tests and electrolysis experiments.
Seawater electrolysis is considered an attractive alternative to conventional freshwater electrolysis for hydrogen production due to the abundance of seawater in nature. For this reason, efficient electrocatalysts for hydrogen evolution reaction (HER) in alkaline seawater are highly desired. In this study, we report an amorphous Co−P alloy on nickel foam (Co−P/NF) that behaves as an efficient and stable HER electrocatalyst for alkaline seawater electrolysis. The Co−P/NF presents high catalytic performance for HER, requiring a low overpotential of 213 mV to drive a current density of 100 mA cm−2 and a Tafel slope of 120.2 mV dec−1 in alkaline seawater. Furthermore, it shows remarkable electrochemical and structural stability in alkaline seawater.
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