Palladium selenides as active methanol tolerant cathode materials for direct methanol fuel cell

Add time:07/30/2019    Source:sciencedirect.com

Palladium selenides, PdSe, Pd3Se and PdSe2 have been prepared by the hydrothermal method and investigated for their structural and electrocatalytic properties toward the oxygen reduction reaction (ORR) using SEM/TEM, XRD, cyclic and linear sweep voltammetries. The crystallites of PdSe and PdSe2 are found to follow tetragonal and orthorhombic crystal structures, respectively. The PdSe electrode in 0.5 M H2SO4 exhibits significantly higher electrocatalytic activity than the Pd3Se or PdSe2 electrode under similar experimental conditions. Further, a change in the palladium/selenium ratio from unity in the catalyst results in low ORR activity.

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