Double perovskite La2MnCoO6 nanoparticles as promising catalysts for electro-chemical hydrogen evolution reactions

Double perovskite La2MnCoO6 (LMCO) nanoparticles have been synthesized by a molten salt method and used as promising catalysts for electro-chemical hydrogen evolution reactions (HERs). An average size of LMCO nanoparticles was estimated approximately 65 nm from electron microscopy. LMCO nanoparticles crystallize in a monoclinic structure (space group of P21/n). The refined lattice constants of a = 5.5038(2) angstrom, b = 5.4462(4) angstrom, c = 7.7547(4) angstrom, and beta = 90.050(3)degrees. LMCO nanoparticles exhibit promising catalytic performances for electro-chemical HERs with a low Tafel slope value (190 mV/dec). The onset over-potential for HERs was found to be approximately 120 mV, which is in good agreement with the reported onset over-potentials of other electrocatalysts for HER. The stability tests confirm that the electrode materials are stable and efficient electro-catalysts for HERs. This is noteworthy that the double perovskites are recognized as promising alternates for precious electro-catalysts.

Automated summary

Double perovskite La2MnCoO6 (LMCO) nanoparticles with average size of 65 nm were synthesized and used as promising catalysts for electro-chemical hydrogen evolution reactions (HERs). LMCO nanoparticles exhibited a monoclinic structure with refined lattice constants. They demonstrated a low Tafel slope value (190 mV/dec) and an onset over-potential for HERs of approximately 120 mV, similar to other reported electrocatalysts. Stability tests confirmed their stability and efficiency as electro-catalysts for HERs.