Porphyrin‐based NiFe Porous Organic Polymer Catalysts for the Oxygen Evolution Reaction

Abstract

Porphyrin‐based NiFe porous organic polymers (POPs) have been synthesized with good porosity and large BET surface areas (261 to 313 m2 g−1). These bimetallic POPs exhibit RuO2‐like OER activity, with the reaction for catalyst FeTAPP‐NiTCPP‐POP reaching a current density of 10 mA cm−2 at a low overpotential of 338 mV and with a small Tafel slope of 52 mV dec−1. FeTAPP‐NiTCPP‐POP was stable over a long period under reaction conditions. These bimetallic POPs exhibit better catalytic activity than their monometallic counterparts, due to synergetic interactions between the iron and nickel centers to facilitate the electrocatalytic process.

Electrocatalytic water oxidation performance in an extended porous organic framework with a covalent alliance of distinct Ru sites

“…1. The formation of the complex was confirmed by 1 H and 13 C NMR spectroscopy, provided in Fig. S1 and S2, † respectively.…”

“…S5 in the ESI † except for a broad peak in the lower 2θ region, which clearly demonstrates an amorphous nature. 19 To establish molecular connectivity and the specific chemical environment of each carbon atom present in the POP framework, 13 C-CP MAS NMR spectroscopy was carried out on Ru@Bpy-POP (Fig. 2a).…”

“…27 It is also important to mention that the polymer network struc-Fig. 2 (a) 13 C-CP solid state MAS NMR spectrum, (b) N 2 -adsorption/desorption isotherms, and (c) pore-size distribution as measured by the NLDFT method of Ru@Bpy-POP. Core-level deconvoluted XP spectra of (d) Ru-3p, (e) C-1s, and (f ) N-1s of as-synthesized Ru@Bpy-POP.…”

Recent Advances in Porphyrin-Based Systems for Electrochemical Oxygen Evolution Reaction

“…Recently, Yang and Hu et al reported a series of porphyrin-based NiFe POP catalysts (M 1 TAPP-M 2 TCPP-POP in Figure 11 ) for electrochemical OER [ 76 ]. In their study, four POPs including FeTAPP-NiTCPP-POP (M 1 = Fe, M 2 = Ni), NiTAPP-FeTCPP-POP (M 1 = Ni, M 2 = Fe), FeTAPP-FeTCPP-POP (M 1 = Fe, M 2 = Fe), and NiTAPP-NiTCPP-POP (M 1 = Ni, M 2 = Ni) were prepared via amidation reactions, and both the monomers and POPs were tested for electrocatalytic OER.…”

Hydrosilylative Reduction of CO2 to Formate and Methanol Using a Cobalt Porphyrin‐Based Porous Organic Polymer

“…Porous organic polymers (POPs) [11][12][13] have quickly emerged as a suitable platform for heterogeneous catalytic transformations due to their excellent chemical stability, high surface areas, and tunable molecular skeletons. These attributes permit the integration of various CO 2 -philic units and organometallic linkers, such as metalloporphyrins, [14][15][16] to hydrogenate CO 2 to a chemical fuel or fine chemical in the presence of a suitable reductant. Hydrosilanes are great for reducing CO 2 due to the formation of thermodynamically stable SiÀ O bonds.…”