Ultrathin PdTe nanowires anchoring reduced graphene oxide cathodes for efficient hydrogen evolution reaction

Abstract

The design and synthesis of efficient electrocatalysts for hydrogen evolution reaction under all pH conditions is extremely desirable but still remains a challenge. Here a facile method to decorate PdTe nanowires on reduced graphene oxide nanosheets (PdTe NWs/rGO) has been developed. As a robust integrated 2D hydrogen-evolving cathode catalyst, the Pd3.02Te NWs/rGO shows a low onset potential of -7 mV and maintains its catalytic activity for at least 48 h in alkaline media. It requires overpotentials (η) of 97 and 355 mV to afford current densities of 10 and 100 mA cm(-2), respectively. The Pd3.02Te NWs/rGO also exhibits a high activity and excellent durability in acidic media.

Doping palladium with tellurium for the highly selective electrocatalytic reduction of aqueous CO2 to CO

“…1b ) consists of asymmetric Pd 3d 5/2 and 3d 3/2 peaks centered at 335.3 and 340.6 eV, respectively, characteristic of Pd 0 . 18 The Pd 3d binding energies (BEs) of PdTe/FLG are shifted to higher values compared with the BEs of Pd/FLG (the bottom panel in Fig. 1b ), suggesting electron transfer from Pd to Te.…”

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

“…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.…”

TePtFe Nanotubes as High‐Performing Bifunctional Electrocatalysts for the Oxygen Reduction Reaction and Hydrogen Evolution Reaction

“…This remarkable enhancement of catalytica ctivityo fT ePtFe NTs/C could be attributed to the following reasons:1 )the modified electron structure of Pt as aresultofthat Fe alloying increases the number of surfacev acancies, whiche nhances O 2 adsorption on the Pt surfacea nd weakenst he OÀOb ond, resulting in fast breaking of the OÀObondand improved O 2 reductionkinetics; [47,48] 2) the uniquet ubularf eature allows the existence ofe xtended Pt surfaceswithi ntrinsically high ORRs pecifica ctives ites on the sidew alls, leadingt oadramatice nhancement of the overallO RR performance;3 )the opens tructure also stronglyf a-cilitatesO 2 and faste lectron transport; 4) thep resenceo fs mall single crystalso fT ePtFef orming NTsi sa notherg reat advantage fori ncreasingt he electrocatalyticallya ctive sites; [31] and 5) the CV procedure cane xpose morea ctive sites, which furtherp romotet he electrocatalyticactivityofc atalysts. [49][50][51][52] For the mechanism of the dramatically improved stability, two main aspects are proposed:1 )The unique 1D multi-alloy metal NT structure prevents Pt NPs from aggregating, dissolution, and detachingf rom the support material. [53,54] 2) Compared with Pt atoms,t he Te and Fe atomsi ntroduced, which form the Pt overlayero fT ePtFe NTs, have ac ontracted interatomic distance between Pt atoms, in comparison with that of pure Pt.…”