mixing a particulate matrix, comprising α-cellulose, hemicellulose, and lignin, with a palladium compound in an aqueous solution to form a suspension, wherein the α-cellulose, the hemicellulose, and the lignin are entirely obtained from jute stems;

combining the suspension with a reducing agent to form a mixture; and

heating the mixture to thereby reduce at least 50 wt. % of the palladium compound, relative to total catalytic metal weight, and form the solid-supported palladium catalyst,

wherein the particles of the particulate matrix have no average dimension less than 10 μm, and

wherein the lignin is present in the particulate matrix in a range of from 15 to 30 wt. % relative to total particulate matrix weight.