1. NOC-9M shows a drastic drop in BET surface area (536 → 29 m²/g) but retains the highest H₂O₂ selectivity. How can selectivity be meaningfully compared when the catalyst’s porous structure nearly collapses? The apparent high selectivity may arise from mass transport limitations rather than intrinsic active site enhancemeInt.
2. Inconsistent ECSA vs. BET trends: In Figure 5a, ECSA is used to correlate with activity, but ECSA was measured by double-layer capacitance in a non-Faradaic region. For NOC-9M, the extremely low BET area (29 m²/g) suggests negligible electrochemical surface area, yet the paper implies it still contributes to selectivity. Was ECSA actually measurable for NOC-9M? If so, the value should be reported; if not, the correlation in Figure 5a is misleading.
