fig1
From: Rational engineering of hydroxyapatites for sustainable chemicals, H2, biofuels and CO2 conversion
Figure 1. (A) Number of publications using keywords “hydroxyapatite” and “catalyst” from the year 2000 to the year 2025 from Web of Science as of 28 March 2025. (B) Schematic of the various surface engineering strategies for HAP.
