Ultrathin NiSe Nanosheets on Ni Foam for Efficient and Durable Hydrazine-Assisted Electrolytic Hydrogen Production

Abstract

Hydrazine-assisted electrochemical water splitting is an important avenue toward low cost and sustainable hydrogen production. An efficient and stable bifunctional electrocatalyst for the hydrogen evolution reaction (HER) and the anodic hydrazine oxidation reaction (HzOR) is fundamental to this goal. Herein, we employed a facile method to fabricate ultrathin NiSe nanosheet arrays on nickel foam (NiSe/NF), which exhibits predominant electrocatalytic activity for both HER and HzOR. Our investigations revealed that the excellent electrocatalytic activity of the NiSe/NF mainly arises from the abundant electrocatalytic active sites endowed by the ultrathin nanosheet morphology, the rugged feature of the extended (100) nanosheet surface, the rich presence of Se on the nanosheet surface, and the three-dimensional (3D) porous structure of the NF and other factors such as high conductivity of the NiSe/NF and strong NiSe–NF adhesion. We assembled a hydrazine-boosted electrochemical water splitting cell using NiSe/NF as a bifunctional catalyst for both of the electrodes, and the constructed cell exhibits an ultralow overpotential (310 mV at 10 mA cm–2), which is robust for 30 h continuous electrolysis in a 1 M KOH electrolyte. This work provides a promising avenue toward low cost, high-efficiency, and stable hydrogen production based on hydrazine-assisted electrolytic water splitting for future.

A galvanic replacement reaction and the Kirkendall effect in the room-temperature synthesis of tubular NiSe2: a nanozyme catalyst with peroxidase-like activity

“…12 Further, an ultrathin NiSe nanosheet has been grown hydrothermally on Ni foam. 13 Gas phase selenization in Ar atmosphere of acid-treated commercial Ni foam has also been adopted for the synthesis of porous NiSe 2 . 14 Similarly, metal organic frameworks (MOFs) have also been used as single source precursor materials for the synthesis of different nickel selenide materials.…”

Green Preparation of CNTs/Graphite Supported NiFe Carbonate Hydroxides for Oxygen Evolution Reaction

“…In addition, the electrochemical double-layer capacitances (C dl ) is adopted to estimate the electrochemically active surface areas (ESCA) of catalysts due to the positive correlation relation between them. [29] The C dl of NiFe CHs-CNT/G, NiFe CHs, NiFe CHsÀ CNT, NiFe CHsÀ G, NiFe CHsÀ CNT/G (Without-AcT), and CNT/G are displayed in Figure 5c corresponding to 6.47, 3.57 0.7, 4.04, and 2.68 mF cm À 2 respectively. It can be seen that NiFe CHs-CNT/G has the largest C dl value.…”

Applications of Nickel‐Based Electrocatalysts for Hydrogen Evolution Reaction

“…[31] Ni-based materials, including Ni metal oxides, sulfides, selenides, tellurides, and phosphides, with remarkable catalytic HER performance and outstanding conductivity have attracted particular attention. [32][33][34][35][36] Numerous reports on enhancing the catalytic performance by means of morphology control and optimization of the chemical structures, along with external excitation using strain, magnetism, and an electric field, have been documented. [4,[37][38][39] The main solution is to manufacture advanced Ni-based catalysts with a designed structure and morphology to directly obtain a low overpotential.…”