An amorphous nanoporous PdCuNi-S hybrid electrocatalyst for highly efficient hydrogen production

Yang, Xi; Xu, Wence; Cao, Shuo; Zhu, Shengli; Liang, Yanqin; Cui, Zhenduo; Yang, Xianjin; Li, Zhaoyang; Wu, S. L.; Inoue, Akihisa; Chen, Luyang

doi:10.1016/j.apcatb.2019.01.030

Cited by 80 publications

(40 citation statements)

References 60 publications

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“…−1 for the Ni, Ni 97 Bi 3 , Ni 78 Bi 22 , Ni 55 Bi 45 , and Ni 23 Bi 77 , respectively. The higher ECSA values at lower Bi content indicate the presence of more accessible active sites for the electrocatalytic oxidation of methanol …”

Section: Resultsmentioning

confidence: 99%

“…2) The 3D porous morphology possesses short diffusion length, facilitates the mass transfer of reactants through the electrolyte/electrode interface, and endows the catalyst with a higher ECSA and more accessible active sites for catalysis (Figures S19d–g). 3) The dominant amorphous structure could provide more active sites and improve the diffusion of the electrolyte and the charge‐transfer efficiency during the MOR (Figure S19g) . 4) The superficial formation of oxygenated species at the Ni surface can help to oxidize the dissociative intermediates produced on nearby Ni sites to facilitate the elimination of the poisoning effect of CO (Figure S19h).…”

Section: Resultsmentioning

confidence: 99%

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High‐Performance Bismuth‐Doped Nickel Aerogel Electrocatalyst for the Methanol Oxidation Reaction

et al. 2020

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Low-cost, non-noble-metal electrocatalysts are required for direct methanol fuel cells,b ut their development has been hindered by limited activity,high onset potential, low conductivity,a nd poor durability.Asurface electronic structure tuning strategy is presented, which involves doping of aforeign oxophilic post-transition metal onto transition metal aerogels to achieve an on-noble-metal aerogel Ni 97 Bi 3 with unprecedented electrocatalytic activity and durability in methanol oxidation. Trace amounts of Bi are atomically dispersed on the surface of the Ni 97 Bi 3 aerogel, which leads to an optimum shift of the d-band center of Ni, large compressive strain of Bi, and greatly increased conductivity of the aerogel. The electrocatalyst is endowed with abundant active sites, efficient electron and mass transfer,r esistance to CO poisoning, and outstanding performance in methanol oxidation. This work sheds light on the design of high-performance non-noblemetal electrocatalysts.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

High‐Performance Bismuth‐Doped Nickel Aerogel Electrocatalyst for the Methanol Oxidation Reaction

et al. 2020

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“…À1 for the Ni, Ni 97 Bi 3 ,N i 78 Bi 22 ,N i 55 Bi 45 ,a nd Ni 23 Bi 77 ,r espectively.T he higher ECSA values at lower Bi content indicate the presence of more accessible active sites for the electrocatalytic oxidation of methanol. [21] As for the electrocatalytic activity in methanol oxidation of the as-prepared aerogels,t he Ni 97 Bi 3 aerogel revealed the highest MOR activity in terms of mass current density.T he electrocatalytic activity is more pronounced in the lower potential region than in the higher potential region (Figure 5a). Forinstance,the measured current density of the Ni aerogel increases from 25.9 to 825.9 Ag cat.…”

Section: Angewandte Chemiementioning

confidence: 98%

“…3) Thed ominant amorphous structure could provide more active sites and improve the diffusion of the electrolyte and the charge-transfer efficiency during the MOR (Figure S19g). [21] 4) Thes uperficial formation of oxygenated species at the Ni surface can help to oxidize the dissociative intermediates produced on nearby Ni sites to facilitate the elimination of the poisoning effect of CO (Figure S19h). 5) Thed oping of Bi changes the electronic properties of Ni, induces as trained surface,a nd optimizes the d-band center (Figures S19i,j), resulting in an abundant production of oxygenated species that can reduce strong adsorption of CO-like intermediates to al ow level on the Ni 97 Bi 3 catalyst surface.…”

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confidence: 99%

High‐Performance Bismuth‐Doped Nickel Aerogel Electrocatalyst for the Methanol Oxidation Reaction

et al. 2020

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“…Tafel slope is a guide to determine the mechanism and the rate-determining step (r.d.s.) for the HER, based on the classical combination or Tafel reaction and (iii) desorption or Heyrovsky reaction [ 51 , 52 ]. The first step is ruled by the discharged process where a proton and a transferred electron interact, forming an adsorbed hydrogen atom on the electrode surface [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

Nanostructured Molybdenum Oxides from Aluminium-Based Intermetallic Compound: Synthesis and Application in Hydrogen Evolution Reaction

et al. 2021

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Characterized by a large surface area to volume ratio, nanostructured metal oxides possess unique chemical and physical properties with applications in electronics, catalysis, sensors, etc. In this study, Mo3Al8, an intermetallic compound, has been used as a precursor to obtain nanostructured molybdenum oxides. It was prepared into ribbons by arc-melting and melt-spinning techniques. Single and double-step free corrosion of the as-quenched material have been studied in 1 M KOH, 1 M HF and 1.25 M FeCl3 at room temperature. In both cases, nanostructured molybdenum oxides were obtained on a surface layer a few microns thick. Two of the as-prepared samples were tested for their electrocatalytic capability for hydrogen evolution reaction (HER) in 0.5 M H2SO4 giving low onset potential (−50 mV, −45 mV), small Tafel slopes (92 mV dec−1, 9 mV dec−1) and high exchange current densities (0.08 mA cm−2, 0.35 mA cm−2 respectively). The proposed nanostructured molybdenum oxides are cost-effective and sustainable due to the cheap and abundant starting material used and the simple synthetic route, paving the way for their possible application as HER electrocatalysts.

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An amorphous nanoporous PdCuNi-S hybrid electrocatalyst for highly efficient hydrogen production

Cited by 80 publications

References 60 publications

High‐Performance Bismuth‐Doped Nickel Aerogel Electrocatalyst for the Methanol Oxidation Reaction

High‐Performance Bismuth‐Doped Nickel Aerogel Electrocatalyst for the Methanol Oxidation Reaction

High‐Performance Bismuth‐Doped Nickel Aerogel Electrocatalyst for the Methanol Oxidation Reaction

Nanostructured Molybdenum Oxides from Aluminium-Based Intermetallic Compound: Synthesis and Application in Hydrogen Evolution Reaction

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