Patterned Synthesis of Pd₄S: Chemically Robust Electrodes and Conducting Etch Masks

Abstract

A simple, one‐step process to synthesize Pd4S films is reported here along with their characterization using X‐ray diffraction, electron microscopy, and electrical measurements. The synthesis involves thermolysis of a single‐source precursor, namely palladium alkanethiolate, in H2 atmosphere at 250 °C for 3 h. The films are highly conducting and resistant to strong acidic, alkali, and oxidizing environments. The precursor allows patterning of the Pd4S films by electron beam lithography and micromolding, an attribute that has been employed in making chemically resistant electrodes and etch masks. The conversion of palladium thiolate to other sulfide phases is also achieved.

Synthesis and Photocatalytic Properties of Cu2S–Pd4S Hybrid Nanoplates

“…To verify the formation of Cu 2 S–Pd 4 S hybrids, we performed several analyses. As shown in Figure 2e, the HRTEM image of a Pd 4 S domain in the hybrid showed a d spacing of 2.21 Å for adjacent lattice fringes, which correlated well with that of the (112) planes of tetragonal Pd 4 S 9a. In addition, the XRD pattern of the as‐prepared Cu 2 S–Pd 4 S hybrids exhibited diffraction peaks that were distinct from those of hexagonal Cu 2 S and tetragonal Pd 4 S (Figure S2 in the Supporting Information).…”

Detecting the Genesis of a High-Performance Carbon-Supported Pd Sulfide Nanophase and Its Evolution in the Hydrogenation of Butadiene

“…In addition, it has been reported that Pd 4 S can intrinsically behave as a metal, especially in relation to conducting electrons. 25 The values of mean particle size estimated using the Scherrer equation for the Pd 4 S phase are of 17.4 and 10.8 nm for PdSO 4 −HHTox and PdCl 2 −HHT-SO 3 H catalysts reduced at 250 °C, respectively.…”

“…Therefore, the XRD-identified Pd 4 S phase may be described as an alloy type compound with structure basically similar to Pd 0 where the S atoms occupy substitutional sites resulting in some distortions. In addition, it has been reported that Pd 4 S can intrinsically behave as a metal, especially in relation to conducting electrons . The values of mean particle size estimated using the Scherrer equation for the Pd 4 S phase are of 17.4 and 10.8 nm for PdSO 4 –HHTox and PdCl 2 –HHT-SO 3 H catalysts reduced at 250 °C, respectively.…”

Palladium Nanoparticle-Enabled Ultrathick Tribofilm with Unique Composition

“…However, the adhesive force of the initially formed Pd clusters/islands could strongly attract and be encapsulated by substrate or mobile wear debris, known as strong metal–support interaction (SMSI). The Figure S4 cross-sectional analysis clearly shows the Pd- and S-rich tribofilm nicely bonded to the Fe and O substrates at the tribofilm–substrate interface, reminiscent to the SMSI, which may catalyze the tribochemical reactions to further grow the tribofilm. − In addition, the surface-adsorbed thiolated PdNPs at the contact interface may self-react to form Pd 4 S complexes or Pd 4 S NPs triggered by the thermomechanical stress. Lin et al suggested heat-induced (>125 °C) sulfur diffusion into the PdNP through grain boundaries, resulting in a sulfurized composition.…”