Pd‐Ni/Cd loaded PPy/Ti composite electrode: Synthesis, characterization, and application for hydrogen storage

Abstract

Summary A wide compositional range of Pd‐Ni/Cd on polypyrrole (PPy)‐modified Ti plates (Pd‐Ni/Cd/PPy/Ti) was fabricated via electrochemical deposition. The hydrogen absorption properties of the prepared Pd‐Ni/Cd/PPy/Ti electrodes were evaluated using cyclic voltammetry and chronoamperometry in acidic media. The optimal Pd36‐Ni7/Cd57/PPy/Ti electrode achieved a hydrogen storage capacity of 331.3 mC cm−2 mg−1 and an H/Pd ratio of 0.77. The enhancement of the hydrogen storage was attributed to a synergistic effect between the Pd‐Ni/Cd catalysts. The surface morphology, crystallinity, and chemical composition of the Pd‐Ni/Cd/PPy/Ti electrode were characterized using scanning electron microscope (SEM), X‐ray diffraction (XRD), and X‐ray photoelectron spectroscopy (XPS), respectively. Hydrogen spillover occurred on the trimetallic catalysts, and secondary hydrogen spillover occurred on the PPy/Ti support. The enhanced hydrogen sorption capacity was due to both the synergistic effect of the trimetallic catalysts and the assistance of PPy, making Pd‐Ni/Cd/PPy/Ti a promising hydrogen storage material.

In situ chemo‐polymerized polypyrrole‐coated filter paper for high‐efficient solar vapor generation

“…In recent years, benefiting from the exploration of a number of photothermal, including carbon-based materials (carbon black, CNTs, graphene, GO, and rGO), 18 [29][30][31][32][33][34][35] ceramicbased materials (TiN and Ti 3 C 2 ), 8,36 plasmonic metal nanomaterials (Au and Ag,), [37][38][39] and polymer materials (polypyrrole [PPy], polydopamine, poly(1,3,5-hexahydro-1,3,5-triazine), and conjugated microporous polymers), [40][41][42][43][44][45] because of their broadband and high light absorption, great progress has been made in the design and fabrication of high efficiency solar steam generation devices. 46 In general, PPy, as a conjugated conductive polymer, has been explored for many applications, for instance, light-emitting diodes, [47][48][49][50] supercapacitor, 51,52 medical treatment, 53 catalysts, 54 and corrosion protection. 55,56 Moreover, based on its strong near-infrared light absorption (wavelength >700 nm), good in vivo biocompatibility, low biotoxicity, and facile chemical polymerization, PPy exhibits a great potentiality in the field of photothermal evaporation, and it is also studied extensively as the photothermal agent for cancer removal.…”

A multifunctional separator with Mg(OH)2 nanoflake coatings for safe lithium-metal batteries

“…Up to now, a variety of techniques have been developed to attempt solving LMB safety issues, including structured anode [7][8][9][10], artificial solid electrolyte interphase (SEI) [11,12], electrolyte additive [13,14], high salt concentration of electrolyte [15,16], solid-state electrolyte [17,18] and separator modification [19][20][21][22][23][24][25][26][27][28]. Although these efforts improve LMB safety with varying degrees, most work only focus on a single aspect at a time.…”

The impacts of nitrogen doping on the electrochemical hydrogen storage in a carbon

“…[20][21][22][23][24][25][26] Besides, the electrochemical hydrogen storage also possesses the merits of simplicity, reusability and safety. 27 The mechanism of electrochemical storage contains a few steps as described below: [13][14][15]24,[28][29][30][31] I. In the electrochemical reduction process (charging): when the electrons are transferred from the carbon electrode to the H 2 O molecules in the electrolyte at electrode/electrolyte interface, isolated H atoms are formed and adsorbed on the electrode surface (Volmer reaction).…”