“Sacrificial protection in action!”: ultra-high stability of palladesite mineral towards the oxygen reduction reaction

Abstract

Pd17Se15 nanoparticles have been synthesized by a one-pot colloidal synthesis method. An accelerated degradation test confirms the ultra-high stability of the catalyst which gets enhanced after 50 000 cycles.

Catalytically active nanosized Pd9Te4(telluropalladinite) and PdTe (kotulskite) alloys: first precursor-architecture controlled synthesis using palladium complexes of organotellurium compounds as single source precursors

“…The L2, 1 and 2 have been prepared (Scheme 1) and characterized with 1 H, 13 C and 125 Te NMR spectroscopy (ESI: Fig. S1-S8 †) and mass spectrometry (ESI: Fig.…”

“…1 In this regard, metal chalcogenide nanomaterials [1][2][3] have attracted the attention of researchers increasingly due to their various applications in energy conversion, storage and electronics, 2-5 development of materials for semiconductors, [6][7][8] dye-sensitized solar cells, 9,10 magnesium-air batteries, 11 aerogel fabrication, 12 and catalysis. [13][14][15][16][17][18][19][20] Among different metal chalcogenides reported in literature, signicant work has been done in recent past on the exploration and development of binary phases of tellurides of various metals (excluding palladium), mainly due to their potential application 2 in memory devices, photovoltaic cells, thermoelectrics, biochemical applications, semiconductors with enhanced thermoelectric properties in nanocomposites, photothermal therapy, thin lms and nanomaterials and catalysis. 2,4,[18][19][20] Aer the discovery of easy methods of preparation 16,17,21 of binary phases of palladium selenide and their role in catalysis, 16,17 there has been an enormous increase during last ve years on the discovery of interesting applications of palladium selenides 3,9-14 in various elds including catalysis.…”

“… 1 In this regard, metal chalcogenide nanomaterials 1–3 have attracted the attention of researchers increasingly due to their various applications in energy conversion, storage and electronics, 2–5 development of materials for semiconductors, 6–8 dye-sensitized solar cells, 9,10 magnesium–air batteries, 11 aerogel fabrication, 12 and catalysis. 13–20 …”

Reversing the Activity Center in Doped Pd17Se15 to Achieve High Stability Toward the Electrochemical Hydrogen Evolution Reaction

“…Pd in its 2+ state has a weaker adsorption toward hydrogen and hence becomes deactivated for the HER. Because of its 2– state, Se has extra electron density near the Fermi level and hence becomes active for HER. , Alloying with Ni further tunes the electronic structure of the catalyst to have optimized adsorption of H on the chalcogen site.…”

“…Motivated by our previous works on CoPd 2 Se 2 , Pd 17 Se 15 , and (Cu/Pd) 17 Se 15 , which demonstrated better activity and stability through alloying/substitution, we performed electrochemical studies on (Ni/Pd) 17 Se 15 to generalize the high stability of Pd-based chalcogenides. We believe that the asymmetric distribution of electron density on such chalcogenide systems generates an adsorption site that favors the coupling of two *H to form a H–H bond.…”