Large-Scale and Simple Synthesis of NiFe(OH)x Electrode Derived from Raney Ni Precursor for Efficient Alkaline Water Electrolyzer DOI Open Access

Tianshui Li,

Wei Liu,

Huijun Xin

и другие.

Catalysts, Год журнала: 2024, Номер 14(5), С. 296 - 296

Опубликована: Апрель 29, 2024

Water electrolysis is a crucial technology in the production of hydrogen energy. Due to escalating industrial demand for green hydrogen, required electrode size traditional alkaline water electrolyzer has been increasing. Numerous studies have focused on developing highly active oxygen evolution reaction (OER) catalysts electrolysis. However, there remains significant gap between microscale synthesis laboratory settings and macroscale preparation scenarios. This challenge particularly pronounced sizable self-supported electrodes. In this work, we employed commercially available Raney Ni-coated Ni mesh as precursor material fabricate NiFe(OH)x@Raney anode with substantial dimension exceeding 300 mm through straightforward immersion technique. The as-prepared exhibited remarkable electrocatalytic OER activity, an overpotential only 240 mV achieve 10 mA cm−2. performance comparable that NiFe-LDHs synthesized via hydrothermal method, which difficult scale up applications. Furthermore, demonstrated exceptional durability, maintaining stable operation over 100 h at current density 500 large-scale displayed consistent overpotentials across various areas, indicating uniform catalytic activity. When integrated into device, it delivered average cell voltage 1.80 V 200 cm−2 achieved direct energy consumption low 4.3 kWh/Nm3. These findings underline suitability electrodes applications, offering promising alternative energy-efficient production.

Язык: Английский

Large-Scale and Simple Synthesis of NiFe(OH)x Electrode Derived from Raney Ni Precursor for Efficient Alkaline Water Electrolyzer DOI Open Access

Tianshui Li,

Wei Liu,

Huijun Xin

и другие.

Catalysts, Год журнала: 2024, Номер 14(5), С. 296 - 296

Опубликована: Апрель 29, 2024

Water electrolysis is a crucial technology in the production of hydrogen energy. Due to escalating industrial demand for green hydrogen, required electrode size traditional alkaline water electrolyzer has been increasing. Numerous studies have focused on developing highly active oxygen evolution reaction (OER) catalysts electrolysis. However, there remains significant gap between microscale synthesis laboratory settings and macroscale preparation scenarios. This challenge particularly pronounced sizable self-supported electrodes. In this work, we employed commercially available Raney Ni-coated Ni mesh as precursor material fabricate NiFe(OH)x@Raney anode with substantial dimension exceeding 300 mm through straightforward immersion technique. The as-prepared exhibited remarkable electrocatalytic OER activity, an overpotential only 240 mV achieve 10 mA cm−2. performance comparable that NiFe-LDHs synthesized via hydrothermal method, which difficult scale up applications. Furthermore, demonstrated exceptional durability, maintaining stable operation over 100 h at current density 500 large-scale displayed consistent overpotentials across various areas, indicating uniform catalytic activity. When integrated into device, it delivered average cell voltage 1.80 V 200 cm−2 achieved direct energy consumption low 4.3 kWh/Nm3. These findings underline suitability electrodes applications, offering promising alternative energy-efficient production.

Язык: Английский

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