Efficient Metal‐free ZIF‐8 Derived B, N‐codoped Carbon Electrocatalyst toward Oxygen Reduction

Abstract

Metal-free carbon materials doped with multiple nonmetal heteroatoms (e. g. N, B, S, P) have emerged as a promising class of electrocatalysts toward oxygen reduction reaction (ORR). Herein, B, N-codoped carbon electrocatalysts are conveniently prepared by use of ZIF-8 precursor, which involves cageencapsulation of PhB(OH) 2 before high-temperature pyrolysis.By modulating the B-doping amount and pyrolysis temperature, an optimal B, N-codoped carbon electrocatalyst toward ORR is achieved, which shows ORR activity (E onset = 0.95 V, and E 1/2 = 0.83 V vs RHE) comparable to the Pt/C benchmark, with a good methanol tolerance and long-term stability.

Heteroatom doped M–N–C single-atom catalysts for high-efficiency oxygen reduction reaction: regulation of coordination configurations

“…The selection of the boron source plays a crucial role in the preparation of B-doped ORR catalysts. At present, a lot of boron-containing precursors have been used in the synthesis of catalysts, including borate, 79 PhB(OH) 2 , 77 etc. Wang et al 80 prepared a bamboo-like Fe, N, B co-doped carbon nanotube catalyst (FeNB/C) by using boron-containing ionic liquids (ILs) as doping sources.…”

Efficient Trimetallic Metal‐Organic‐Framework Derived Cu/Fe3C/N−C Electrocatalysts for Oxygen Reduction

“…However, MOFs used in this scenario seem yet limited to ZIFs, and non‐ZIF MOFs are likely to offer additional insights about the roles of secondary Cu atom given that totally different composition, structure/topology as well as chemical/physical properties. In light of the above reasons, as continuation of our previous research [45–49] we herein employed Fe/Cu/Zn trimetallic metal‐organic‐frameworks (MOFs) (namely Cu/Fe/Zn‐MOF‐x) built by mixed ligands of TTPA (TTPA=tris(4(4H‐1,2,4‐triazol‐4‐yl)phenyl)amine) and TPA (TPA=terephthalic acid) as the precursors, and investigate the impacts of Cu on these MOF‐derived carbon electrocatalysts (designated as Cu/Fe 3 C/N−C‐x‐T, where T stands for the pyrolysis temperature, and x is Cu/Fe molar ratio) (Scheme 1). It demonstrates that the Cu/Fe molar ratio has a profound impact on the morphology of the resultant Cu/Fe 3 C/N−C‐x‐T.…”

Enhanced n‐butanol permselective vapor permeation by incorporating ZIF‐8 into a polydimethylsiloxane composite membrane: Effect of filler loading contents

“…Metal-organic frameworks (MOFs) are a class of compounds constructed from multitopic organic ligands and metal ions/ clusters, and have been widely explored due to their special features, including extremely high porosities, cage-like structure, and tunable optical properties. [15][16][17][18][19] In specific, as a subclass of MOFs, zeolitic imidazolate frameworks (ZIFs) have been focused in the fields of photocatalytic degradation, [20] drug delivery, [21] photodynamic therapy, [22] electrochemical oxdidation, [23] adsorption, [24] and luminescent sensing. [25] Compared to other inorganic fillers, ZIF-8 nanoparticles offers better compatibility with the organic PDMS matrix for MMMs.…”