A highly mismatched NiO₂-to-Pd hetero-structure as an efficient nanocatalyst for the hydrogen evolution reaction

Abstract

NiO2 base crystal serves as an electron donor source which injects electrons to Pd nanocrystals by strong electronegativity difference and lattice strain. It creates a high density of active sites on the NC surface and thus improves the HER kinetics.

High-Performance and Stable Hydrogen Evolution Reaction Achieved by Pt Trimer Decoration on Ultralow-Metal Loading Bimetallic PtPd Nanocatalysts

“…The Tafel plots of as-prepared NCs are shown in Figure b. The Tafel slope for all the NCs is less than 38 mV dec –1 , implying that the HER mechanism on the surface of all NCs followed the Vomer–Tafel reaction . Such a low Tafel slope and high MA 0.05 indicate that downsizing the Pt 1 Pd 1 NCs with proper control on morphological features can significantly improve the HER performance and make the electron transfer process to be the rate-determining step.…”

Submillisecond Laser Annealing Induced Surface and Subsurface Restructuring of Cu–Ni–Pd Trimetallic Nanocatalyst Promotes Thermal CO2 Reduction

“…Figure 2a,b shows the normalized Pd K-edge X-ray absorption near-edge structure (XANES) and Fourier-transformed extended X-ray absorption fine structure (FT-EXAFS) spectra of CNP NCs, respectively, while the Pd-CNT was compared as the reference sample. As shown in Figure 2a, the two absorption peaks "M" and "N" correspond to the electron transition from Pd 1s core-orbital to unoccupied 5p and 4f states, respectively, 36,37 while their intensity is directly related to the unoccupied density of Pd 5p/ 4f orbitals (i.e., the extent of electron transition between Pd and the neighboring atoms). 38 Additionally, the Pd species with higher surface oxygen chemisorption (O ads ) shows higher absorption peak intensities.…”

Synchrotron-based X-ray absorption spectroscopy of Pd nanoparticles decorated on multi-walled carbon nanotubes during successive cycles of He/H2 exposure

“…[9][10][11][12][13][14][15][16][17][18][19][20][21] For instance, palladium nanoparticles (Pd-NPs) exhibit notable competence in the field of hydrogen adsorption. 9,[22][23][24][25][26][27][28][29][30][31][32][33][34][35] For this purpose, laser ablation and chemical reduction methods were examined to decorate carbon nanotubes. 9,[36][37][38] However, Pd-multi-walled carbon nanotube (MWCNT) hybrids suffer from the loss of hydrogen storage capacity after several cycles of adsorption-desorption which mainly arises from the structural damage after interaction with H 2 .…”