Tuning Overall Water Splitting on an Electrodeposited NiCoFeP Films

Abstract

The regulation of geometric and electronic structures is very important to transition metal phosphides with high catalytic properties. Herein, nanofilms consisting of NiCoFeP nanospheres were electrochemically deposited onto 3D Ni foam for the catalysis of water splitting. Depending on the amount of iron, the NiCoFeP nanocatalysts exhibit different surface topographies and chemical binding energies, which have a great influence on electrochemical performances. The optimal NiCoP‐0.01 M Fe films show robust bifunctional electrocatalytic activities with an overpotential of 118 mV (10 mA cm−2) for the hydrogen evolution reaction (HER) and 300 mV (50 mA cm−2) for the oxygen evolution reaction (OER). The overall water splitting employing this proposed nanocatalyst at both electrodes only presents a cell voltage of 1.60 V at the current density of 10 mA cm−2, far lower than that (1.73 V) with the commercial Pt/C cathode and RuO2 anode combination.

Facile Electrodeposition of Mn-CoP Nanosheets on Ni Foam as High-Rate and Ultrastable Electrodes for Supercapacitors

“…No apparent crystalline phases corresponding to Mn-CoP or CoP can be observed, which is possibly ascribed to the low thickness of the Mn-CoP film on Ni foam. 33,34 The surface chemical composition and the elemental valence state of Mn-CoP/NF were investigated by XPS. The elements Mn, Co, P, Ni, C, and O can be clearly observed from the XPS survey spectrum (Figure 2a), in accordance with the EDX spectrum results.…”

“…These three peaks can be identified as the (111), (200), and (220) planes of metallic nickel (PDF#03-1051, cubic), respectively. No apparent crystalline phases corresponding to Mn-CoP or CoP can be observed, which is possibly ascribed to the low thickness of the Mn-CoP film on Ni foam. , …”

Carbon-incorporated bimetallic phosphide nanospheres derived from MOFs as superior electrocatalysts for hydrogen evolution

“…2e), the two peaks at 129.6 and 130.5 eV could represent the binding bonds between metals and P. The peak at around 133.5 eV indicates the binding energy of the oxidized metal phosphides. 53 As for the C 1s spectrum, the binding energies of 284.7, 286.1, and 288.4 eV are representative of CvC, C-O, and CvO, respectively. These bonds were formed by an organic linker during the phosphating process and the CvC peak is much more dominant than the others.…”

Cr-MOF-Based Electrochemical Sensor for the Detection of P-Nitrophenol

“…Because of their high specific surface area, adjustable structure size, low density, and designability, they are all-in-one functional porous polymeric materials [ 14 , 15 ]. Together with great progress for MOFs’ design and preparation, they are widely used in many fields such as gas storage and adsorption, aqueous adsorption and separation, heterogeneous catalysis, targeting theranostics and drug delivery [ 16 , 17 , 18 , 19 , 20 ]. Among the applications in different fields, it is in recent years that MOFs have also attracted the interest of researchers as catalysts in electrochemical reactions [ 21 , 22 ].…”