Regulation of the electric double-layer capacitance of MoS2/ionic liquid by carbon modification

Biomass Carbon Anchored Co‐N4 Single‐Atom Catalyst for Efficient Hydrogen Evolution, Oxygen Evolution and Alcohol Oxidation Reaction

“…The Co-N-LPC-4 has the smallest Tafel slope among the five catalysts, indicating fast electron transfer rate and Volmer-Heyrovsky decisive step for HER. [45] In addition, electrochemical active surface area (EASA) is applied to further describe the catalytic activity, which is evaluated from the double-layer capacitance (C dl ) using CV scanning method. Figure 6(C) and S5 show the CV curves of Co-N-LPC samples conducted with the scanning speed from 20 to 120 mV s À 1 at the potential window from À 0.17 to 0.07 V which reflect the double-layer charging.…”

“…The Co‐N‐LPC‐4 exhibits only a 50.9 mV dec −1 of Tafel slope, which is significantly lower than that of Co‐N‐LPC‐5 (100.7 mV dec −1 ), Co‐N‐LPC‐3 (81.0 mV dec −1 ), Co‐N‐LPC‐2 (99.3 mV dec −1 ) and Co‐N‐LPC‐1 (350.2 mV dec −1 ). The Co‐N‐LPC‐4 has the smallest Tafel slope among the five catalysts, indicating fast electron transfer rate and Volmer‐Heyrovsky decisive step for HER [45] . In addition, electrochemical active surface area (EASA) is applied to further describe the catalytic activity, which is evaluated from the double‐layer capacitance (C dl ) using CV scanning method.…”