Establishing reactivity descriptors for platinum group metal (PGM)-free Fe–N–C catalysts for PEM fuel cells

Abstract

<p>Establishing new reactivity map descriptor of TOF–SD for PGM-free Fe–N–C catalysts ORR activity.</p>

Relevant Properties of Carbon Support Materials in Successful Fe-N-C Synthesis for the Oxygen Reduction Reaction: Study of Carbon Blacks and Biomass-Based Carbons

“…The Fe-N-aPRS KOH and Fe-N-ox-V catalysts containing larger iron and iron carbide particles, on the other hand, have significantly lower onset potentials of 0.789 V RHE and 0.769 V RHE that indicate lower ORR activity. The determined mass activities at 0.80 V RHE are 1.27 A/g and 1.52 A/g for Fe-N-ox-BP and Fe-N-aRS H3PO4 , being highly comparable to activities reported for Fe-N-C catalysts in the literature [ 25 , 38 ]. Fe-N-aRS KOH and Fe-N-ox-V have significant lower mass activities with values of 0.19 A/g and 0.13 A/g.…”

“…For the inductively coupled plasma mass spectrometry (ICP-MS), the XSeries2 device (Thermo Fisher Scientific) was used. Samples were prepared according to the literature by mixing 15 mg of catalyst with 2 mL of concentrated HNO 3 (Rotipuran ® Sup, Carl Roth) for 1 hat 100 °C [ 38 ]. After filtration, a solution of 50 mL using 2 vol% HNO 3 was prepared followed by the addition of 1 mg/L of scandium as the internal standard.…”

Restoring the Nitrogen Cycle by Electrochemical Reduction of Nitrate: Progress and Prospects

“…This speculation could be supported by the research suggesting that nitrite is serving as a probe molecule in the quantification of the electrochemically active surface area of Fe-N-C catalysts. [93,94,185,186] Recent studies also indicate that M-N-C can directly convert nitrate into N 2 (although the selectivity is relatively low). The low selectivity could be promoted by the design and construction of dual active sites by hosting metal atoms in the carbon matrix side-by-side.…”

Transition Metal and Metal–Nx Codoped MOF‐Derived Fenton‐Like Catalysts: A Comparative Study on Single Atoms and Nanoparticles

“…[1][2] Especially, single-atom catalysts have emerged as a new research frontier in both energy and environmental sciences, featuring with atomically dispersed active sites and characteristic electronic properties. [3][4][5][6][7][8][9][10][11] On the other hand, water contaminations caused by toxic benzene-derived compounds, such as endocrine disruptors from the plastics industry, dyestuff pollution, and antibiotic used in the cultivation industry, have led to an enormous threat to the environment and human health. [12][13][14][15][16] In recent years, the peroxymonosulfate (PMS)-based Fenton-like catalytic oxidation process has been regarded as a clean approach to generating reactive oxygen species (ROS), which presents a promising potential to overcome the ever-growing pollutants in water systems resulted from the toxic benzene-derived compounds.…”