An Fe-N/S-C hybrid electrocatalyst derived from bimetal-organic framework for efficiently electrocatalyzing oxygen reduction reaction in acidic media

Song, Shuqin; Wu, Mingmei; Chen, Junwei; Mo, Zhuohua; Chen, Rui; Wang, Kun; Yu, Tongwen

doi:10.1016/j.jechem.2020.04.066

Cited by 31 publications

(12 citation statements)

References 40 publications

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“…The high-resolution spectrum of C 1s presents the three peaks corresponding to C–C (284.8 eV), CN/C–S (285.8 eV), and O–CO (290.1 eV) (Figure S5a). − For the N 1s peak of Cu-N-SC-1100, five peaks corresponding to pyridinic-N (398.1 eV), Cu–N (399.0 eV), pyrrolic-N (398.9 eV), graphitic-N (400.8 eV), and oxidized-N (403.1 eV) were observed, respectively (Figure b). , As expected, performing the pyrolysis without NH 3 resulted in no detectable N 1s features in SC-1100. However, performing the pyrolysis in the presence of NH 3 but no Cu foam, all of the peaks except the Cu–N (399.0 eV) can be observed in N-SC-1100.…”

Section: Results and Discussionsupporting

confidence: 51%

Advanced Trifunctional Electrocatalysis with Cu-, N-, S-Doped Defect-Rich Porous Carbon for Rechargeable Zn–Air Batteries and Self-Driven Water Splitting

Wang

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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Fuel cells and water splitting are promising sustainable energy storage and conversion systems that can facilitate the usage of renewable resources and reduce the reliance on fossil fuels. These applications require catalysts to perform the required oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). It would be ideal to use a non-noble metal-based multifunctional catalyst for these reactions. Herein, a new type of porous carbon doped with Cu, N, S was prepared as a trifunctional catalyst for the ORR, OER, and HER from S-rich polyphenylene sulfide (PPS). By oxidatively treating the PPS, we critically prevented high-temperature melting of the precursor. Further, high-temperature pyrolysis using ammonia (NH 3 ) desulfurized and introduced N into the carbon matrix, increasing structural defects and the surface area. By introducing copper during the pyrolysis, the tridoped (Cu, N, S) catalyst was successfully synthesized. The extremely large number of active sites and the local chemical environment enable excellent electrocatalytic performance and stability across ORR, OER, and HER at levels superior or comparable to noble metals. This catalyst was also used as the sole catalyst in Zn−air batteries and overall water splitting to demonstrate excellent performance. This synthesis method can pave the way toward new catalyst design and discovery, enabling more versatile and robust energy applications.

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Section: Results and Discussionsupporting

confidence: 51%

Advanced Trifunctional Electrocatalysis with Cu-, N-, S-Doped Defect-Rich Porous Carbon for Rechargeable Zn–Air Batteries and Self-Driven Water Splitting

Wang

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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“…We can observe that the atomic percentage of the Ni element increases with the increase in the added Ni 2+ precursor in Pt 1 Ni x @NC, indicating that the Ni content in the catalyst is closely related to the addition of the Ni 2+ precursor, which is consistent with the ICP result (Table S1). Moreover, the as-obtained Pt 1 Ni x @NC catalyst shows an additional nitrogen element signal with respect to the pristine Pt/C catalyst, revealing the success of nitrogen doping . As depicted in Figure S5b, the N 1s spectra of the Pt 1 Ni x @NC catalyst can be deconvoluted into three peaks for pyridinic-N at ∼398.40 eV, for pyrrolic-N at ∼400.57 eV, and for graphitic-N at ∼402.32 eV.…”

Section: Resultsmentioning

confidence: 88%

A Facile and Green Eutectic Salt-Mediated Pyrolysis Strategy to Synthesize Hollow PtNi Alloy Nanocubes for Oxygen Reduction Reaction

Zhou

Liao

Wang

et al. 2022

ACS Appl. Energy Mater.

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The preparation of low-cost, high-activity, and high-stability platinum (Pt)-based oxygen reduction reaction (ORR) catalysts is the key to the large-scale commercial application of proton exchange membrane fuel cells. Herein, we designed a facile synthesis strategy to achieve direct transformation of solid Pt nanoparticles into hollow PtNi alloy nanocubes through a eutectic salt-mediated pyrolysis strategy and nanoscale Kirkendall effect. This distinctive hollow structure makes the inner and exterior spaces easy to access, which would expose additional active sites and a high active surface area. Accordingly, the as-synthesized Pt1Ni8@NC sample, with the moderate Ni feeding content, exhibits an improved ORR activity and stability with respect to a pristine Pt/C catalyst. Such improvement in ORR performance is mainly caused by the moderate surface compositions, high surface area, and well-designed nanostructure. Indeed, this facile surfactant- and template-free synthetic strategy in our work can be extended for fabricating electrocatalysts with a similar hollow cubic structure.

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“…At present, commercial carbon-supported Pt (Pt/C) is still well-acknowledged as the most efficient electrocatalyst for ORR. However, high cost and poor stability in practical operation conditions remain a significant challenge for the large-scale applications of FC vehicles. − Thus, it is important to explore cheap, stable, and efficient non-precious-metal ORR catalysts to replace the commercial Pt/C more than ever before.…”

Section: Introductionmentioning

confidence: 99%

MOF-Derived Porous Fe-N-C Materials for Efficiently Electrocatalyzing the Oxygen Reduction Reaction

et al. 2022

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Fe-based metal–organic framework (MOF)-derived Fe-N-C materials as non-precious-metal oxygen reduction reaction (ORR) electrocatalysts to replace commercial Pt/C and realize real commercial applications still suffer from poor intrinsic electrical conductivity and part embedding or agglomeration of Fe-N active sites. Herein, we develop conductivity-enhanced MOF-derived porous Fe-N-C material via pyrolyzing Fe-based MOF particles (Fe-MIL-NH2) in situ grown onto as-prepared three-dimensional (3D) nitrogen-doped porous carbon materials (NPCs). Benefiting from the enhanced electrical conductivity, good dispersibility of Fe-N active sites, and rapid mass transfer due to the 3D ordered interconnected NPC framework, the best-performing sample (Fe3O4/NPC-50-900) exhibits an onset potential of 0.96 V (vs reversible hydrogen electrode (RHE)) and a limiting current density of 5.2 mA/cm2 for electrocatalyzing ORR in 0.1 M KOH aqueous solution, which is comparable to that of commercial Pt/C (20 wt %, Johnson Mattey Corp.). Moreover, Fe3O4/NPC-50-900 also exhibits good methanol tolerance and long-term durability. This work provides a feasible strategy to address the issues of poor electrical conductivity and inferior Fe-N active site exposure of Fe-N-C materials derived from Fe-based MOFs, thus accelerating the practical application of MOF-derived materials.

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An Fe-N/S-C hybrid electrocatalyst derived from bimetal-organic framework for efficiently electrocatalyzing oxygen reduction reaction in acidic media

Cited by 31 publications

References 40 publications

Advanced Trifunctional Electrocatalysis with Cu-, N-, S-Doped Defect-Rich Porous Carbon for Rechargeable Zn–Air Batteries and Self-Driven Water Splitting

Advanced Trifunctional Electrocatalysis with Cu-, N-, S-Doped Defect-Rich Porous Carbon for Rechargeable Zn–Air Batteries and Self-Driven Water Splitting

A Facile and Green Eutectic Salt-Mediated Pyrolysis Strategy to Synthesize Hollow PtNi Alloy Nanocubes for Oxygen Reduction Reaction

MOF-Derived Porous Fe-N-C Materials for Efficiently Electrocatalyzing the Oxygen Reduction Reaction

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