NOVELTY - Forming (M1) electrocatalyst for oxygen reduction reaction involves (a1) reacting organic ligand, first transition metal/its salt, and first catalytic precursor (preferably heteroatom-containing organic molecule) to form product, where the product comprises metal organic framework (MOF) having first transition metal; (b1) reacting second catalytic precursor (preferably second transition metal or its salt) with the product until precipitate is formed; and (c1) isolating the precipitate and subjecting it to pyrolysis, where the first transition metal evaporates yielding electrocatalyst.    USE - For synthesizing an electrocatalyst for an oxygen reduction reaction; in cathode for an electrolytic process for chlorine evolution in a chlor-alkali electrolysis cell; in cathode for an electrolytic process for chlorine evolution in hydrochloric acid (HCl) electrolyzer; in cathode for a phosphoric acid fuel cell; in cathode for carrying out an oxygen reduction reaction in an electrolytic process; for chlorine evolution method; and for generating electrical energy (claimed).    ADVANTAGE - The method shortens reaction time for MOF synthesis from days to hours or minutes; provides chemical encapsulation of catalytic active site precursors for oxygen reduction reaction during the synthesis as opposed to crude mixing of precursors into the MOF pores, resulting in a cleaner product with more effective active sites; requires less equipment; and uses ambient conditions.    DETAILED DESCRIPTION - Synthesizing (M1) an electrocatalyst for an oxygen reduction reaction involves (a1) reacting an organic ligand, a first transition metal or its salt, and a first catalytic precursor (preferably heteroatom-containing organic molecule) to form a product, where the product comprises a metal organic framework (MOF) comprising the first transition metal; (b1) reacting a second catalytic precursor (preferably second transition metal or its salt) with the product resulting from (a1) until a precipitate is formed, where the first and the second catalytic precursors are encapsulated inside the MOF; and (c1) isolating the precipitate and subjecting it to pyrolysis, where the first transition metal evaporates yielding the electrocatalyst. INDEPENDENT CLAIMS are included for the following:    (1) synthesizing (M2) a metal organic framework (MOF) involving providing a solution comprising an organic ligand, a first transition metal or its salt, and a first solvent, heating the solution using microwaves, and stirring, where a precipitate is obtained, and washing the precipitate with a second solvent thereby obtaining the MOF;    (2) an electrocatalyst (A1) either produced by the method (M1); or    (3) an electrocatalyst (A2) comprising MOF having a graphene-like structure, where the MOF comprises a transition metal coordinated with heteroatoms in the MOF;    (4) cathode (C1) for an electrolytic process for chlorine evolution in a chlor-alkali electrolysis cell, comprising the electrocatalyst (A1) or (A2);    (5) cathode (C2) for an electrolytic process for chlorine evolution in hydrochloric acid (HCl) electrolyzer, comprising the electrocatalyst (A1) or (A2);    (6) cathode (C3) for a phosphoric acid fuel cell comprising the electrocatalyst (A1) or (A2);    (7) cathode (C4) for carrying out an oxygen reduction reaction in an electrolytic process, comprising the electrocatalyst (A1) or (A2), where the cathode is resistant to anion poisoning;    (8) method (M3) of chlorine evolution involving either electrolyzing brine in a chlor-alkali electrolysis cell, where the cathode of the cell comprises the electrocatalyst (A1) or (A2); or electrolyzing HCl in an HCl electrolyzer, where the cathode of the electrolyzer comprises the electrocatalyst (A1) or (A2);    (9) generating (M4) electrical energy involving using a fuel cell comprising the electrocatalyst (A1) or (A2).