Photon-induced synthesis of ultrafine metal nanoparticles on graphene as electrocatalysts: impact of functionalization and doping

Abstract

Utilizing reducing species generated by high-energy photons offers an alternative strategy to prepare metal nanoparticles (NPs) in the absence of a foreign reductant.

Carbon Dots and RuP2 Nanohybrid as an Efficient Bifunctional Catalyst for Electrochemical Hydrogen Evolution Reaction and Hydrolysis of Ammonia Borane

“…As previously reported, both the composition ratio of the catalyst and pyrolysis temperature of its precursor would influence its catalytic activity for HER. The durability and high activity of RuP 2 /1.03CDs-900 might have been due to the nitrogen-doped CDs effectively preventing the agglomeration and corrosion of the RuP 2 NPs, whose special membrane structure could increase the number of reactive sites and the adsorption of protons. − The favorable structure of RuP 2 /1.03CDs-900 for proton adsorption prompted it to be also useful for hydrogen production catalyzed by AB.…”

Electro-Sorption of Hydrogen by Platinum, Palladium and Bimetallic Pt-Pd Nanoelectrode Arrays Synthesized by Pulsed Laser Ablation

“…Figure 5a shows the XPS of the Pd-GP in the Pd 3d binding energy region. The spectrum was deconvoluted with the superposition of two doublet components; a dominating doublet at 335.5 and 340.8 eV (5.3 eV spin-orbit coupling) is associated to the 3d 5/2,3/2 of metallic palladium (Pd 0 ) states and a doublet at 337.5 and 342.8 eV (5.3 eV spin-orbit coupling) is associated to Pd(II) due to a partial surface oxidation of palladium [42,43]. Figure 5b shows the XPS of the Pt-GP in the Pt 4f binding energy region.…”

“…Figure 5c shows the XPS of the Pt 80 Pd 20 -GP in the Pd 3d binding energy region. The Pd 3d level was deconvoluted with the superposition of two doublet components: a dominating doublet at 335.5 and 340.8 eV (5.3 eV spin-orbit coupling) is associated to the metallic palladium (Pd 0 ) states, and the doublet at 336.8 and 342.1 eV (5.3 eV spin-orbit coupling) is associated to Pd(II) due to a partial surface oxidation of palladium [42,43]. Gaussian relative intensities are almost coincident with those observed for the Pd-graphene sample, but the higher binding energy doublet (336.8-342.1 eV) is at 0.7 lower binding energy values with respect to that observed for the Pd-graphene-sample.…”

One-Step Synthesis of Modified Ti3C2 MXene-Supported Amorphous Molybdenum Sulfide Electrocatalysts by a Facile Gamma Radiation Strategy for Efficient Hydrogen Evolution Reaction

“…Gamma radiation is reported as the effective and versatile technique for the synthesis and modification of nanomaterials. − The advantages for this technique include low energy consumption at room temperature, less use of toxic chemicals, and simple manufacture schemes which are easy to scale up . Above all, with the adjustable radiation process parameters such as absorbed dose/absorbed dose rate, the controllable synthesis of nanoparticles could be realized and all these advantages make the gamma radiation technique superior to most of the other methods .…”

“…It is known that the gamma radiation technique is an effective method for the surface modification of MXenes for increasing surface area . Besides, it can realize the synthesis of a series of inorganic nanoparticles. ,, Recently, Yang et al reported a plasma-modified Ti 3 C 2 –CdS hybrid by two-step synthesis involving plasma treatment and the solvothermal process for the enhanced performance . However, the facile one-step strategy for the modification of the MXene and its hybridization with nanomaterials is rarely explored, which is feasible with the gamma radiation technique and well worth investigating.…”