Welcome to online web server of hydrogen production rate of perovskite oxide prediction. This is a online web server with very simple operation. Users only need to enter relevant information according to the operating steps and rules, and then click "Predict" to obtain the hydrogen production rate of target perovskite. Steps: 1.Preparation method: This is the preparation method of perovskite. Enter numbers 1 to 7 to represent solid state reaction, hydrothermal, sol-gel, polymerized complex, molten salt method, combustion and other methods,respectively. 2. "Photocatalyst", "light intensity" and "calcination temperature" can be entered in any number. The following rules must be remembered when entering the chemical formula of perovskite: 1.This online web server is designed for ABO3-type perovskite, not applicable to other types of perovskite. 2.In the entered chemical formula, there is no space between elements and their coefficients. Example 1: chemical formula LaFeO3 is entered as LaFeO3. Example 2: chemical formula Ca0.9La0.1Ti0.9Cr0.1O3 is entered as Ca0.9La0.1Ti0.9Cr0.1O3. Example 3: chemical formula Sr(Ti0.8Fe0.2)0.99Sc0.01O3 is entered as SrTi0.792Fe0.198Sc0.01O3.