Achieving Complete Hydrogen Evolution from N2H4BH3 over Mesoporous TiO2 Immobilized NiPt Alloy Nanoparticles

Abstract

Mesoporous materials, as the supports in the fabrication of catalyst, are beneficial for the dispersion of the metal active sites in the pores. Herein, highly dispersed NiÀ Pt alloy nanoparticles deposited on mesoporous TiO 2 was facilely and successfully fabricated via a one-step reduction method towards hydrogen generation from N 2 H 4 BH 3 . Unexpectedly, the optimized Ni 0.5 Pt 0.5 /meso-TiO 2 exhibits superior catalytic prop-erty and 100 % selectivity with a turnover frequency (TOF) value of 77.06 min À 1 in the existence of sodium hydroxide at 323 K. Meanwhile, the catalyst achieves high stability and reusability even after five recycles. This study provides one new way for preparation of mesoporous TiO 2 supported metal NPs for hydrogen generation reaction [a

Improving the Coke Resistance of Ni‐Ceria Catalysts for Partial Oxidation of Methane to Syngas: Experimental and Computational Study

“…The HR‐TEM analysis of 5Ni‐0.25Pt/CeO 2 catalyst showed the presence of hexagonal nanoparticles as shown in the Figure 4c. It could be seen that the particles have a d‐spacing value of 0.217 nm, which was different from that of 0.204 nm of Ni (111) and 0.227 nm of Pt (111) plane [58] . According to the previous report, the presence of the particles with a fringe distance of ∼0.217 nm indicates the formation of NiPt alloy [59] .…”

“…It could be seen that the particles have a d-spacing value of 0.217 nm, which was different from that of 0.204 nm of Ni (111) and 0.227 nm of Pt (111) plane. [58] According to the previous report, the presence of the particles with a fringe distance of ~0.217 nm indicates the formation of NiPt alloy. [59] In addition, the TEM analysis of 5Ni-0.25Pd/CeO 2 also showed the presence of particles with a fringe distance of 0.218 nm, which also indicates the formation of NiPd alloy as can be seen in Figure 4f.…”

Mn‐Modified Graphitic Carbon Nitride‐Supported Bimetallic PtNi Nanoparticles for Hydrogen Generation from Hydrous Hydrazine

“…Chemical hydrogen storage materials have attracted the attention of researchers because of high hydrogen contents and mild reaction conditions. Common chemical hydrogen storage materials mainly include HCOOH, [8] NaBH 4 , [9] NH 3 BH 3 , [10] N 2 H 4 BH 3 [11] and N 2 H 4 ⋅ H 2 O [12–14] . Among these materials, hydrous hydrazine (N 2 H 4 ⋅ H 2 O), as extensively potential hydrogen carrier, has aroused an extensive range of interest owing to its nontoxicity, low cost, high hydrogen content (8.0 wt%) and excellent stability [15–17] .…”