Ultrafine platinum-iridium distorted nanowires as robust catalysts toward bifunctional hydrogen catalysis

Wang, Mingmin; Wang, Mengjun; Zhan, Changhong; Geng, Hongbo; Li, Yunhua; Huang, Xiaoqing; Bu, Lingzheng

doi:10.1039/d2ta04882e

Cited by 31 publications

(17 citation statements)

References 55 publications

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“…DTAC (AR, 98%) was supplied by Sinopharm Chemical Reagent Co. Ltd. (Shanghai, China). All other chemicals used in this work were described in our previous works. , …”

Section: Methodsmentioning

confidence: 99%

“…All other chemicals used in this work were described in our previous works. 37,47 Preparations of PtNiIn FNWs with Different Compositions. To synthesize Pt 66 Ni 6 In 28 FNWs, 10.0 mg of Pt(acac) 2 , 2.1 mg of Ni(acac) 2 , 27.0 mg of DTAC, 20.0 mg of glucose, and 5 mL of OAm were placed in a glass vial.…”

Section: Methodsmentioning

confidence: 99%

“…All characterization techniques employd in this work were described in our previous publications. 37,47 Electrochemical Measurements. Except for the loading amounts on the surface of a glassy-carbon electrode (GCE) of catalysts all being 15.3 μg Pt cm −2 , all other catalyst treatments and electrochemical measurements were similar to those in our previous works.…”

Section: Methodsmentioning

confidence: 99%

“…Except for the loading amounts on the surface of a glassy-carbon electrode (GCE) of catalysts all being 15.3 μg Pt cm −2 , all other catalyst treatments and electrochemical measurements were similar to those in our previous works. 37,47 Taking Pt 66 Ni 6 In 28 FNWs/C as an example, 3 mg of obtained powders was dispersed in a mixture of 1 mL of isopropanol and 5 μL of 5% Nafion solution, followed by 30 min of ultrasonication. Then, 5 μL of electrocatalyst ink was dropped onto the GCE surface.…”

Section: Methodsmentioning

confidence: 99%

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PtNi/PtIn-Skin Fishbone-Like Nanowires Boost Alkaline Hydrogen Oxidation Catalysis

Wang,

Meng,

Tang

et al. 2023

ACS Nano

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The development of high-performance platinum (Pt)-based electrocatalysts for the hydrogen oxidation reaction (HOR) is highly desirable for hydrogen fuel cells, but it is limited by the sluggish kinetics and severe carbon monoxide (CO) poisoning in alkaline medium. Herein, we explore a class of facet-selected Pt−nickel−indium fishbone-like nanowires (PtNiIn FNWs) featuring high-index facets (HIFs) of Pt 3 In skin as efficient alkaline HOR catalysts. Impressively, the optimized Pt 66 Ni 6 In 28 FNWs show the highest mass and specific activities of 4.02 A mg Pt −1 and 6.56 mA cm −2 , 2.0/2.1 and 13.9/15.6 times larger than those of commercial PtRu/C and commercial Pt/C, respectively, along with a competitive CO-tolerance ability. Specifically, they exhibit only 6.0% current density decay after 10000 s of operation and 25.7% activity loss after 2000 s in the presence of 1000 ppm of CO. Moreover, an isotope experiment and density functional theory (DFT) calculations further prove that the unique structure and synergy among Pt, Ni, and In endow these Pt 66 Ni 6 In 28 FNWs with an optimized hydrogen binding energy (HBE) and an advantageous hydroxide binding energy (OHBE), giving them excellent alkaline HOR properties. The combined construction of surface-skin and HIFs in PtNiIn FNWs will offer an available method to realize the potential applications of advanced non-PtRu-based catalysts in fuel cells and beyond.

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“…DTAC (AR, 98%) was supplied by Sinopharm Chemical Reagent Co. Ltd. (Shanghai, China). All other chemicals used in this work were described in our previous works. , …”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

PtNi/PtIn-Skin Fishbone-Like Nanowires Boost Alkaline Hydrogen Oxidation Catalysis

Wang,

Meng,

Tang

et al. 2023

ACS Nano

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“…9c). Wang et al 102 reported ultrafine Pt-Ir distorted nanowires (Pt-Ir DNWs) as a bifunctional catalyst for water splitting to produce green hydrogen. The electrochemical experiment results showed that the Pt-Ir DNWs catalyst has a smaller R ct value than Pt/C, indicating the fast electron transfer of the Pt-Ir DNWs catalyst.…”

Section: Spatial Dimension Regulationmentioning

confidence: 99%

Advanced Pt-based electrocatalysts for the hydrogen evolution reaction in alkaline medium

Ma,

Zhang,

et al. 2023

Nanoscale

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Amorphous MoO_x with High Oxophilicity Interfaced with PtMo Alloy Nanoparticles Boosts Anti‐CO Hydrogen Electrocatalysis

et al. 2023

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Advancing electrocatalysts for alkaline hydrogen oxidation/evolution reaction (HOR/HER) is essential for anion exchange membrane‐based devices. The state‐of‐the‐art Pt‐based electrocatalysts for alkaline HOR suffer from low intrinsic activities and severe CO poisoning due to the challenge of simultaneously optimizing surface adsorption toward different adsorbates. Herein, this challenge is overcome by tuning an atomic MoOx layer with high oxophilicity onto PtMo nanoparticles (NPs) with optimized Had, OHad, and COad adsorption for boosting anti‐CO‐poisoning hydrogen‐cycle electrocatalysis in alkaline media. For alkaline HOR, this catalyst exhibits high kinetics and an exchange current density of 3.19 mA µgPt−1 at 50 mV versus reversible hydrogen electrode and 0.83 mA cmPt−2, 10.3‐ and 3.8‐fold higher than those of commercial Pt/C, respectively. For alkaline HER, it achieves an unprecedented overpotential of 37 mV at 10 mA cm−2. Experimental and theoretical studies show that the orchestrated electronic and oxophilic regulation of the PtMo/MoOx interface NPs simultaneously optimizes Had and OHad adsorption for boosting alkaline hydrogen electrocatalysis, whereas reactive oxygen from the amorphous MoOx atomic layer lowers the CO oxidation reaction barrier, leading to superior anti‐poisoning ability even at 100 ppm CO.

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Ultrafine platinum-iridium distorted nanowires as robust catalysts toward bifunctional hydrogen catalysis

Abstract: Robust platinum (Pt)-based nanocatalysts exhibit highlighted hydrogen catalysis activities, while the slow kinetics in alkaline medium is still a crucial problem for fuel cells and water electrolysis. Here, we report...

Cited by 31 publications

References 55 publications

PtNi/PtIn-Skin Fishbone-Like Nanowires Boost Alkaline Hydrogen Oxidation Catalysis

PtNi/PtIn-Skin Fishbone-Like Nanowires Boost Alkaline Hydrogen Oxidation Catalysis

Advanced Pt-based electrocatalysts for the hydrogen evolution reaction in alkaline medium

Amorphous MoO_x with High Oxophilicity Interfaced with PtMo Alloy Nanoparticles Boosts Anti‐CO Hydrogen Electrocatalysis

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Ultrafine platinum-iridium distorted nanowires as robust catalysts toward bifunctional hydrogen catalysis

Abstract: Robust platinum (Pt)-based nanocatalysts exhibit highlighted hydrogen catalysis activities, while the slow kinetics in alkaline medium is still a crucial problem for fuel cells and water electrolysis. Here, we report...

Cited by 31 publications

References 55 publications

PtNi/PtIn-Skin Fishbone-Like Nanowires Boost Alkaline Hydrogen Oxidation Catalysis

PtNi/PtIn-Skin Fishbone-Like Nanowires Boost Alkaline Hydrogen Oxidation Catalysis

Advanced Pt-based electrocatalysts for the hydrogen evolution reaction in alkaline medium

Amorphous MoOx with High Oxophilicity Interfaced with PtMo Alloy Nanoparticles Boosts Anti‐CO Hydrogen Electrocatalysis

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Product

Resources

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Amorphous MoO_x with High Oxophilicity Interfaced with PtMo Alloy Nanoparticles Boosts Anti‐CO Hydrogen Electrocatalysis