Regulating carbon work function to boost electrocatalytic activity for the oxygen reduction reaction

N, P, S Codoped Carbon Nanozymes with Enhanced Peroxidase-like Activity and Binding Affinity for Total Antioxidant Capacity Assay

“…The specific activities of NPS-C, NP-C, NS-C, and N–C nanozymes were calculated via measuring the absorbance values of oxTMB at 652 nm in the UV–vis absorption spectra (specific activity (SA) is defined as the active unit of nanozyme per milligram; and U is defined as a unit of nanozyme activity, such as the amount of nanozyme that can catalyze 1 μmol of product per minute ). As shown in Figure b, due to the synergistic effect of N, P, and S elements, NPS-C showed the highest specific activity SA = 7.5 U/mg, which was much higher than that of NS-C (3.6 U/mg), NP-C (0.6 U/mg), and N–C (0.4 U/mg).…”

Work Function Describes the Electrocatalytic Activity of Graphite for Vanadium Oxidation

“…20,21 For nitrogen-doped carbon electrodes used in the oxygen reduction reaction, a lower WF has been found to be beneficial. 22 Similarly, an increased WF of carbon due to surface oxidation was associated with the deactivation of Fe−N−C catalysts. 23 Using graphite, the edge orientation (zigzag or armchair) plays an important role for its catalytic and electronic properties.…”

“…However, experimental results on the influence of the WF vary and therefore cannot be readily extrapolated from one system to another. One study for Au–Ag alloys suggests more efficient CO 2 reduction by increasing the WF, while another work claims the opposite for silver electrodes. , For nitrogen-doped carbon electrodes used in the oxygen reduction reaction, a lower WF has been found to be beneficial . Similarly, an increased WF of carbon due to surface oxidation was associated with the deactivation of Fe–N–C catalysts .…”

Biomass Waste‐Derived Electrocatalyst Constructed with g‐C3N4 as a Multifunctional Template for Efficient Oxygen Reduction Reaction

“…[1,2] However, the sluggish 4electron reaction kinetics of ORR limits the application efficiency and development space of these devices, which stimulates the search for electrocatalysts with improved ORR performance. [3][4][5] At present, platinum (Pt)-based materials are recognized as electrocatalysts with the highest ORR activity, [6][7][8][9][10] but the high cost caused by the low natural abundance severely restricts the large-scale commercial production and use of such electrocatalysts. [11][12][13] Meanwhile, Pt-based electrocatalysts has poor long-term stability because it is prone to agglomerate and deactivation, especially in the presence of methanol.…”