Transition metal phosphates (TMPs) have been gaining interest as materials for catalysis, electrocatalysis and electrochemistry due to their low-cost, stability, and tunability . For instance, it has been reported that the performance of iron, nickel, and cobalt phosphates in the oxygen evolution reaction (OER) in neutral/alkaline solutions is comparable to IrO2/RuO2. Ni and NixCo1-x phosphates demonstrate excellent supercapacitor characteristics , zirconium and vanadium phosphates are used in organic catalysis, and silver phosphate in photocatalysis . The chemical stability of TMPs over a wide range of temperatures makes them ideal candidates e.g. for fuel cell applications (optimal T-range for many fuel cells 150°C ≤ T ≤ 350°C ) and electrolysis .