Adwaita Kundu

Buffer solutions allow you to maintain a stable pH level of another solution that is mixed with a buffer

The first stage of oxide formation is the replacement of the ligands of the inner sphere with water with the possibility of its dissociation: MeLn + H2O = MeL(n-1)H2O + L. Then polymerization and, often, deprotonation occurs according to the scheme Me-OH -Me = Me - O - Me + H+. Acidification occurs and the pH decreases. The hydrolysis process requires the possibility of deprotonation of the H2O ligand. Therefore, the medium in suspension must be neutral. You can add acid or alkali as the pH of the solution changes.

You can read it in (Editor made a typo in the title):

Troitskii, S.Y., Belyakova, O.A., Trigub, A.L. Anoparticles оf platinum(ii) oxo-hydrocomplexes: composition, structure, formation mechanism.// Journal of Structural Chemistrythis, 2020, 61(11), P. 1709–1720.

Dear you can adjust the pH of the solution by taking the solution of acid or base in the burrete, and relax it when the pH is going to change.

Best wishes