公开(公告)号：US20240413353A1

公开(公告)日：2024-12-12

申请号：US18496198

申请日：2023-10-27

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： Guoyong Huang ,  Jiawei Wen ,  Maolin Tian ,  Jian Cui ,  Xueli Wang ,  Wenjie Zhang ,  Mingshuai Wu ,  Tongjun Shen

IPC: H01M4/92

Abstract: A method includes 1) removal oil from aluminum-based platinum rhenium-containing spent catalysts; 2) mixing the spent catalyst and sodium hydroxide powder and heating in an oxygen-free environment to obtain a clinker; 3) leaching the clinker in a weakly alkaline aqueous solution to obtain a first leach solution containing the elements Al and Re and a first leach residue containing Pt and Re; 4) converting the first leaching solution into a sodium meta-aluminate solution and a sodium perrhenate solution; 5) adding an aqueous solution of an acidic reagent and an aqueous solution of an oxidizing reagent to the first leaching residue for oxidizing acid leaching to obtain a second leaching solution containing precursors including platinum and rhenium; 6) reducing and loading the precursors on a carbon carrier to obtain the modified platinum based catalyst for fuel cell. The method enables the recovery of Re and Al elements from spent catalysts.