▎ 摘　　要

NOVELTY - A catalyst comprises cerium-zirconium-potassium/reduced graphene oxide nano solid solution. USE - Catalyst. ADVANTAGE - The catalyst has low reaction temperature, high catalytic activity, easy synthesis, low cost and excellent thermal stability. DETAILED DESCRIPTION - A catalyst comprises cerium-zirconium-potassium/reduced graphene oxide nano solid solution of formula: CeAZrBKC/rGO, where A:B:C is 5:1-3:1-3.