Facile synthesis of nitrogen-doped graphene supported AuPd–CeO2 nanocomposites with high-performance for hydrogen generation from formic acid at room temperature

Abstract

AuPd-CeO2 nanocomposites directly nucleated and grown on nitrogen-doped reduced graphene oxide, exhibit excellent catalytic activity and 100% hydrogen selectivity toward formic acid decomposition for hydrogen generation without any additives at room temperature.

Amorphizing of Au Nanoparticles by CeOx–RGO Hybrid Support towards Highly Efficient Electrocatalyst for N2 Reduction under Ambient Conditions

“…The Ce 3d and O 2p spectra of the obtained a ‐Au/CeO x –RGO hybrid with fitted deconvolution peaks are also given in Figure S5 (Supporting Information). As shown in Figure S5a (Supporting Information), four binding energy peaks labeled as U 1 , U 2 , U 1 ′, and U 2 ′ are attributed to Ce 3d 3/2 and 3d 5/2 in CeO 2 , while V and V′ peaks are similar to Ce 3d 3/2 and 3d 5/2 for Ce 2 O 3 . Figure S5b (Supporting Information) shows the O 1s spectra of the a ‐Au/CeO x –RGO hybrid, it can be seen that three binding energy peaks at 529.8, 532.1, and 533.7 eV can be attributed to lattice oxygen ions in CeO 2 , absorbed oxygen and lattice oxygen ions in Ce 2 O 3 , respectively.…”

“…Raman spectroscopy, as shown in Figure b and Figure S3 (Supporting Information), is carried out to measure the defect induced changes in local structure of the obtained specimens. The Raman spectra of both the a ‐Au/CeO x –RGO and c ‐Au/RGO hybrids show the existences of the D (1348 cm −1 , arising from the disordered carbon atoms) and G bands (1595 cm −1 , corresponding to the graphitic hexagon‐pinch mode) . Moreover, one Raman peak, which is attributed to the triply degenerate F 2g mode of the fluorite crystal structure of CeO 2 , centered at about 453 cm −1 is shown in the a ‐Au/CeO x –RGO hybrid, which is considered as the symmetric stretching mode of O atoms around Ce ions .…”

Synthesis, Characterization, and Application of Metal Nanoparticles Supported on Nitrogen‐Doped Carbon: Catalysis beyond Electrochemistry

“…HCOOHðlÞ!H 2 ðgÞþCO 2 ðgÞð 1Þ HCOOHðlÞ!H 2 OðlÞþCOðgÞð 2Þ Fort his purpose,N -doped, reduced graphene oxide (N-rGO) was selected as the support to prepare as eries of Au@Pd core-shell nanoclusters [88] and AuPd-CeO 2 nanocomposites. [89] In the synthesis of both catalysts,N -rGO not only acted as the reducing agent, but was also crucial for the nucleation and growth of bimetallic NPs.T he as-synthesized catalysts exhibited excellent catalytic activity in liquid-phase HCOOH decomposition and 100 %H 2 selectivity at room temperature.…”

Hydrogen Generation from Additive-Free Formic Acid Decomposition Under Mild Conditions by Pd/C: Experimental and DFT Studies

“…A wide variety of bimetallic and trimetallic Pd-based catalysts have been recently reported, e.g. AuPd [36,37], PdNi [38], PdCo [39], PdCu [40], AuPdAg [41], CoAgPd [42] and NiAuPd [43] nanoparticles showing that the enhancement in the catalytic performance is mainly due to electronic and geometric effects.…”