Self-Supported Bimetallic Phosphide Heterojunction-Integrated Electrode Promoting High-Performance Alkaline Anion-Exchange Membrane Water Electrolysis

Abstract

Developing effective, stable, and economical catalysts toward overall water splitting under industrial conditions is crucial for the large-scale production of green hydrogen. Herein, we report a general method to fabricate bimetallic phosphide heterojunctions on nickel foam (NF) for water electrolysis. Benefiting from the unique self-supported integrated structure and optimized electronic structure, the Co2P–Ni12P5/NF and Fe2P–Ni12P5/NF heterojunction exhibits ultralow overpotentials of 219 mV for hydrogen evolution and 342 mV for oxygen evolution at 1000 mA cm–2 in 1 M KOH, respectively. Notably, the assembled two-electrode system attains a high current density of 1000 mA cm–2 with a low cell voltage of 1.678 V under simulated industrial electrolysis conditions. Furthermore, when applied in an anion-exchange membrane water electrolysis (AEMWE) cell, Co2P–Ni12P5/NF||Fe2P–Ni12P5/NF exhibits superior performance over commercial Pt/C/NF||IrO2/NF. Our study provides a general method for developing economical and practical water-splitting electrocatalysts for large-scale renewable hydrogen production.

Revealing the Reaction Mechanism of Lead Anodes in the Manganese Electrowinning Process

“…However, during the electrolysis process, a large amount of anode sludge will be produced on the lead anode. This will deteriorate the anolyte, will affect the mass transfer, and may block the diaphragm. − In an electrolytic manganese factory, production usually pauses every 2 weeks to clean the anode chamber, bringing a lot of inconvenience to the actual production. Additionally, since the anode slime contains about 3% lead elements, the manganese dioxide in the anode slime is tough to use, reducing the utilization rate of manganese resources and increasing the cost of production. , About 100 000 tons of anode slime are produced annually in the world.…”

Anion Exchange Membrane Based on Cross-Linked Poly(2,6-dimethyl-1,4-phenylene oxide)/Poly(dimethylaminophenyl bisdiphenol) for Fuel Cell Applications

“…However, the overall performance of the membrane is based on how the quaternary amine-functionalized components are distributed throughout the polymer matrix. The compatibility of organic components with the polymer matrix could be increased if quaternary amine-functionalized components were modified with organic polymer groups …”

Advanced progress of rhenium (Re)-based electrode materials in electrocatalytic hydrogen evolution: a review

“…At present, noble metal Pt is still utilized as the most advanced electrocatalyst toward the HER due to the small overpotential and low Tafel slope. 19,20 However, the practical application of Pt in the electrocatalytic industry is greatly hindered by its low natural abundance and high expense, and especially, poor stability in alkaline medium. Therefore, exploring earth-abundant, efficient, inexpensive and durable electrocatalysts has become one of the top priorities for scien-tic research.…”