Tailoring the Antipoisoning Performance of Pd for Formic Acid Electrooxidation via an Ordered PdBi Intermetallic

Abstract

Pd-based materials are promising electrocatalysts for the formic acid oxidation reaction (FAOR) but suffer from poor durability due to the poisoning of adsorbed carbon monoxide species (COads). In this work, PdBi ordered intermetallic (O-PdBi) nanoparticles were prepared in an effort to mitigate the formation of adsorbed species like COads through isolating the Pd atoms. The enhanced antipoisoning capability of O-PdBi, relative to Pd, gave rise to superior activity and stability during FAOR. Differential electrochemical mass spectrometry (DEMS) and CO stripping results indicated that COads could be removed more easily on O-PdBi compared with that on Pd. In situ attenuated total reflection-infrared spectroscopy showed that the formation of COads on O-PdBi was effectively suppressed, while both the hollow and bridged COads were detected on Pd with continuous Pd sites. In addition to the higher content of Bi atoms on the Pd-Bi surface, the ordered atomic distribution has played an important role in this effect. This work demonstrates the superiority of ordered intermetallic Pd-based nanocatalysts and provides guidance for promoting stability in FAOR by precluding the formation of COads.

Mesoporous PdBi nanocages for enhanced electrocatalytic performances by all-direction accessibility and steric site activation

“…5b). [39,40] The shift in binding energies of Pd and Bi elements observed in meso-PdBi nanocages is ascribed to the unique Pd-Bi local bonding unit caused by the strong charge exchange between Pd-4d and Bi-(sp) orbitals. [41] To specifically distinguish the electronic structures, the Pd 3d XPS peaks were deconvolved to four peaks (Fig.…”

Noble Metal‐Based Multimetallic Nanoparticles for Electrocatalytic Applications

“…[ 196 , 197 ] Finally, the intermetallic Pd–Bi system covers a wide range of ordered phases; however, control over size and shape has been largely limited. [ 198 ] Recent efforts on this highly complicated system have offered supported nanoparticles of different intermetallic phases, such as Pd 3 Bi nanoparticles, by electrochemical dealloying of carbon‐supported β ‐PdBi 2 , [ 199 ] β ‐PdBi nanoparticles prepared via impregnation reduction at 600 °C, [ 200 ] and Pd 31 Bi 12 nanoparticles electrochemically deposited on carbon support at room temperature. [ 201 ]…”

Nanoporous trimetallic PdCuAg alloys as efficient electrocatalysts by all-direction accessibility and synergetic effects

“…[30][31][32] Wang et al reported that PdBi alloys exhibited greatly enhanced activity and stability toward the formic acid oxidation reaction. 33 Integrating the nanoporous nanostructure with the alloying effect to form a nanoporous Pd-based alloy will pledge superior electrocatalytic applications. Despite obvious advances in nanoporous alloys, few examples have been reported for ternary nanoporous PdCuAg alloys partially due to the failure of so-templates in navigating the growth of metals with different growth kinetics and crystallinities.…”