Atomically ordered non-precious Co3Ta intermetallic nanoparticles as high-performance catalysts for hydrazine electrooxidation

Feng, Guang; An, Li; Li, Biao; Zuo, Yuxuan; Jin, Song; Ning, Fanghua; Jiang, Ning; Cheng, Xiaopeng; Zhang, Yuefei; Xia, Dingguo

doi:10.1038/s41467-019-12509-7

Cited by 81 publications

(47 citation statements)

References 65 publications

(61 reference statements)

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“…Xia and co-workers reported that the tubular CoSe 2 nanosheets grown on Ni foam could act as bifunctional HER and HzOR electrocatalysts, which required a cell voltage of 0.164 V to achieve a current density of 10 mA cm −2 in the twoelectrode system 21 . Non-precious Co 3 Ta intermetallic nanoparticles prepared by Xia's group shows an onset potential of −86 mV and two times higher specific activity than commercial Pt/C 24 . Despite these progress, there are still several remained challenges in this area.…”

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confidence: 99%

Manipulating dehydrogenation kinetics through dual-doping Co3N electrode enables highly efficient hydrazine oxidation assisting self-powered H2 production

et al. 2020

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Replacing sluggish oxygen evolution reaction (OER) with hydrazine oxidation reaction (HzOR) to produce hydrogen has been considered as a more energy-efficient strategy than water splitting. However, the relatively high cell voltage in two-electrode system and the required external electric power hinder its scalable applications, especially in mobile devices. Herein, we report a bifunctional P, W co-doped Co 3 N nanowire array electrode with remarkable catalytic activity towards both HzOR (−55 mV at 10 mA cm −2) and hydrogen evolution reaction (HER, −41 mV at 10 mA cm −2). Inspiringly, a record low cell voltage of 28 mV is required to achieve 10 mA cm −2 in two-electrode system. DFT calculations decipher that the doping optimized H* adsorption/desorption and dehydrogenation kinetics could be the underlying mechanism. Importantly, a self-powered H 2 production system by integrating a direct hydrazine fuel cell with a hydrazine splitting electrolyzer can achieve a decent rate of 1.25 mmol h −1 at room temperature.

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confidence: 99%

Manipulating dehydrogenation kinetics through dual-doping Co3N electrode enables highly efficient hydrazine oxidation assisting self-powered H2 production

et al. 2020

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“…2. In order to prepare ultrasmall NPs with uniform dispersion, the carbon supports were added to the reaction solution prior to the co-reduction of metal salts 26 and a series of comparative samples with different loadings were obtained ( Supplementary Fig. 3 and Fig.…”

Section: Resultsmentioning

confidence: 99%

Engineering sub-2 nm ultrasmall high-entropy alloy nanoparticles with extremely superior performance for hydrogen evolution catalysis

Xia

Feng

Ning

et al. 2021

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The development of intrinsically effective and low-cost catalysts is critical for the large-scale commercial applications of electrocatalytic hydrogen production. Although various electrocatalysts have demonstrated high activities for hydrogen evolution reaction (HER), it remains a formidable challenge to develop an extremely efficient and durable catalyst for practical use, especially in acidic media. Here, we report quinary ultrasmall NiCoFePtRh high-entropy alloy (us-HEA) nanoparticles (NPs) with extremely superior performance for HER. The us-HEA NPs are well dispersed on the carbon supports, with an average diameter of 1.68 nm, which is the smallest size in the reported HEAs. The us-HEA/C achieves an ultrahigh mass activity of 28.3 A mg-1noble metals (much higher than that of other reported advanced catalysts) at -0.05 V (vs the reversible hydrogen electrode, RHE) for HER in 0.5 M H2SO4 solution, which is 40.4 and 74.5 times higher than those of the commercial Pt/C and Rh/C catalysts, respectively. Moreover, the us-HEA/C demonstrates the highest reported turnover frequency of 30.1 s−1 at 50 mV overpotential (41.8 times higher than that of the Pt/C catalyst) and excellent stability with no decay after 10,000 cycles. Both operando X-ray absorption spectroscopy and theoretical calculations reveal the true active sites and a synergistic effect among five elements, which endow us-HEA/C with significantly enhanced HER activity. This work not only provides a general and facile strategy for synthesizing us-HEA NPs, highlights HEAs as sufficiently advanced materials in energy electrocatalysis, but also acts as a guidance for elucidating the actual reaction process and catalytic mechanism of complex multi-element systems.

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“…Increasing the number of surface active sites is also required because more available active sites for reactants/intermediates will further boost electrocatalytic reactions. [65,66] Two effective strategies have been extensively developed to greatly increase the specific surface areas of metallic nanocatalysts. Catalysts with smooth surfaces cannot display high electrocatalytic performance due to the exposure of limited active sites as well as a weak electronic effect.…”

Section: Surface Regulationmentioning

confidence: 99%

Low‐Dimensional Metallic Nanomaterials for Advanced Electrocatalysis

Shang

Wang

et al. 2020

Adv Funct Materials

153

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The development of clean sustainable energy technologies has been significantly promoted by advances in electrocatalysts, especially for lowdimensional metallic nanomaterials (LDMNs), which have distinctive structural, physiochemical, and electronic properties, including a highly active surface area, efficient electron transfer, and rich surface unsaturated atoms. Recent advances have also revealed that surface engineering, interface engineering, and strain engineering for LDMNs can readily lead to increased surface active centers, strong synergistic effects, and electronic modulation, thus providing new approaches that greatly promote the electrocatalytic performance. In this review, the recent progress in LDMNs is highlighted in the context of their potential as electrocatalysts with superb performance for advanced electrocatalytic reactions. The latest achievements in their structural design, controllable synthesis, mechanistic understanding, and avenues for performance enhancement are illustrated. Strategies for controlled synthesis of high-quality LDMNs and discussed, and to boost the future development of LDMNs for energy-related conversion technology, future perspectives and potential challenges are also proposed.

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Atomically ordered non-precious Co3Ta intermetallic nanoparticles as high-performance catalysts for hydrazine electrooxidation

Cited by 81 publications

References 65 publications

Manipulating dehydrogenation kinetics through dual-doping Co3N electrode enables highly efficient hydrazine oxidation assisting self-powered H2 production

Manipulating dehydrogenation kinetics through dual-doping Co3N electrode enables highly efficient hydrazine oxidation assisting self-powered H2 production

Engineering sub-2 nm ultrasmall high-entropy alloy nanoparticles with extremely superior performance for hydrogen evolution catalysis

Low‐Dimensional Metallic Nanomaterials for Advanced Electrocatalysis

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