Self-supported PdNi dendrite on Ni foam for improving monohydric alcohol and polyhydric alcohols electrooxidation

Key Words:ETHANOL OXIDATION; ETHYLENE-GLYCOL; NANOSHEET; PALLADIUM; ELECTROCATALYSTS; PERFORMANCE; COMPOSITES; GLYCEROL; CATALYST; CU

Abstract:Despite considerable efforts to study direct alcohol fuel cells (DAFCs), the development of efficient bifunctional catalysts for monohydric alcohol and polyhydric alcohols remains a great challenge. This work reports the preparation of self-supported PdNi dendrites on Ni foam (self-supported PdNi DNTs/NF) with a large specific surface area by a simple self-sacrificing template and hydrothermal method. The presence of NF with enrichment of nucleation sites is crucial for the generation of self-supported PdNi DNTs. The as-obtained self-supported PdNi DNTs/NF exhibits an excellent property for ethanol and glycerol electrooxidation with the mass activity of 2375.7 mA mg(cat)(-1) and 2451.6 mA mg(cat)(-1), the specific activity of 10.07 mA cm(-2) and 10.84 mA cm(-2), respectively, in alkaline media, which should attribute to abundant high-index facets and low-coordinated atoms on the edge of branches. Furthermore, the PdNi DNTs/NF exhibits outstanding long-term durability in the current-time test for 7200 s with superior anti-CO poisoning performance, possessing a potential application in DAFCs.

Volume:326

Issue:wu

Translation or Not:no