An effective hybrid electrocatalyst for the alkaline HER: Highly dispersed Pt sites immobilized by a functionalized NiRu-hydroxide

Li, Dan; Chen, Xufang; Lv, Yaozha; Zhang, Guoyang; Huang, Yucheng; Liu, Wei; Li, Yang; Chen, Rongsheng; Nuckolls, Colin; Ni, Hongwei

doi:10.1016/j.apcatb.2020.118824

Cited by 95 publications

(52 citation statements)

References 34 publications

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“…The S-NiRu was synthesized by the hydrothermal method. [31] First, a piece of NF (1 × 4 cm 2 , thickness of 0.5 mm, pore size of 0.1 mm, porosity of 97.2%) was washed with acetone to remove organic matter on its surface, and then ultrasound in 3.0 m HCl solution for 15 min to remove oxides on the NF. Finally, the treated NF was washed several times with deionized water and ethanol and then dried in an oven.…”

Section: (8 Of 9)mentioning

confidence: 99%

Atomically Dispersed Ruthenium on Nickel Hydroxide Ultrathin Nanoribbons for Highly Efficient Hydrogen Evolution Reaction in Alkaline Media

et al. 2021

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Achieving highly efficient hydrogen evolution reaction (HER) in alkaline media is a great challenge. Single‐atom catalysts with high‐loading amount have attracted great interest due to their remarkable catalytic properties. Herein, by using nickel foam as the substrate, the authors design and precisely synthesize atomic ruthenium (Ru)‐loaded nickel hydroxide ultrathin nanoribbons (R‐NiRu) with a high atomic Ru loading amount reaching ≈7.7 wt% via a one‐step hydrothermal method. The presence of concentrated Cl− in the synthetic system is beneficial for constructing ultrathin nanoribbons, which, with abundant edge OH groups, make it easy to trap atomic Ru. Taking advantage of the synergy between atomic Ru and the nanoribbon morphology of nickel hydroxide, R‐NiRu exhibit a low overpotential of 16 mV for HER at 10 mA cm−2 and a Tafel slope of 40 mV dec−1 in aqueous 1.0 m KOH solution, which are superior to those of commercial Pt/C (overpotential of 17 mV at 10 mA cm−2, Tafel slope of 43 mV dec−1). Density functional theory (DFT) calculation results demonstrate that atomically dispersed Ru can significantly reduce the HER energy barrier. Moreover, R‐NiRu maintains exceptional stability after 5000 cyclic voltammetry cycles. This efficient and facile synthetic strategy provides a new avenue for designing efficient catalysts.

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Section: (8 Of 9)mentioning

confidence: 99%

Atomically Dispersed Ruthenium on Nickel Hydroxide Ultrathin Nanoribbons for Highly Efficient Hydrogen Evolution Reaction in Alkaline Media

et al. 2021

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“…Besides, it needs only an overpotential of 75 mV to reach a large current density of 100 mA cm −2 , implying its promising nature for real industrial applications. [ 55 , 56 ] These values are much better than the recently reported electrocatalysts, for example, Sr 2 RuO 4 (61 mV, 51 mV dec −1 ), [ 49 ] NiRu‐LDH (166 mV, 107 mV dec −1 ), [ 57 ] and NiCo 2 S 4 (80 mV, 58.5 mV dec −1 ) [ 58 ] (Figure 4d and Table S4 , Supporting Information). The Tafel slope of 38 mV dec −1 for VRu 0.027 O x /GDY (Figure 4c ) suggests that electrocatalyst proceeds a Volmer−Heyrovsky mechanism for HER in alkaline condition.…”

Section: Resultsmentioning

confidence: 78%

Bimetallic Mixed Clusters Highly Loaded on Porous 2D Graphdiyne for Hydrogen Energy Conversion

et al. 2021

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There is no doubt that hydrogen energy can play significant role in promoting the development and progress of modern society. The utilization of hydrogen energy has developed rapidly, but it is far from the requirement of human. Therefore, it is very urgent to develop methodologies and technologies for efficient hydrogen production, especially high activity and durable electrocatalysts. Here a bimetallic oxide cluster on heterostructure of vanadium ruthenium oxides/graphdiyne (VRuO x /GDY) is reported. The unique acetylene-rich structure of graphdiyne achieves outstanding characteristics of electrocatalyst: i) controlled preparation of catalysts for achieving multiple-metal clusters; ii) regulation of catalyst composition and morphology for synthesizing high-performance catalysts; iii) highly active and durable hydrogen evolution reaction (HER) properties. The optimal porous electrocatalyst (VRu 0.027 O x /GDY) can deliver 10 mA cm −2 at low overpotentials of 13 and 12 mV together with robust long-term stability in alkaline and neutral media, respectively, which are much smaller than Pt/C. The results reveal that the synergism of different components can efficiently facilitate the electron/mass transport properties, reduce the energy barrier, and increase the active site number for high catalytic performances.

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“…Although significant efforts have been put toward designing efficient catalysts for HOR and HER, platinum (Pt) and Pt-based catalysts are still widely recognized as the state-of-the-art hydrogen electrocatalysts. − However, their commercialization is limited because of the scarcity, high cost, and poor durability of Pt-based materials in an acidic electrolyte. To preferably balance the relationship between catalytic activity and cost-effectiveness, a potentially feasible stratagem has been propounded to design low-Pt-loading catalysts without immolating activity. − Among the approaches, maximizing the utilization of Pt and searching for its optimal state is one general method. − …”

Section: Introductionmentioning

confidence: 99%

Hydrogen Evolution/Oxidation Electrocatalysts by the Self-Activation of Amorphous Platinum

Chen

Cui

et al. 2021

ACS Appl. Mater. Interfaces

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Amorphous nanostructures usually exhibit special and intriguing catalytic activities, and the electrochemical performance can be tuned during operation. Herein, a facile approach of the self-activation of amorphous platinum (A-Pt) nanospheres has been applied to develop a durable and efficient hydrogen electrode catalyst toward both the hydrogen evolution reaction (HER) and the hydrogen oxidation reaction (HOR), which was in situ converted to crystalline counterparts and partially oxidized during the electrochemical cycling, leading to the self-activated enhancements of both HER and HOR activities with the decreased overpotential by 5 times and the increased hydrogen oxidation current density by 67%, respectively. Especially, in addition to 12 times higher mass activity compared to benchmark Pt/C, in situ-activated A-Pt also demonstrated a lower HER overpotential even after 20 000 cycles than Pt/C. The significantly improved catalytic performance benefits from the rapid self-reconstruction processes (crystallization and oxidation) of the amorphous Pt during electrochemical cycling. This work shows the intriguing properties of the amorphous nanostructure and provides a new idea for designing an efficient electrocatalyst by phase engineering.

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An effective hybrid electrocatalyst for the alkaline HER: Highly dispersed Pt sites immobilized by a functionalized NiRu-hydroxide

Cited by 95 publications

References 34 publications

Atomically Dispersed Ruthenium on Nickel Hydroxide Ultrathin Nanoribbons for Highly Efficient Hydrogen Evolution Reaction in Alkaline Media

Atomically Dispersed Ruthenium on Nickel Hydroxide Ultrathin Nanoribbons for Highly Efficient Hydrogen Evolution Reaction in Alkaline Media

Bimetallic Mixed Clusters Highly Loaded on Porous 2D Graphdiyne for Hydrogen Energy Conversion

Hydrogen Evolution/Oxidation Electrocatalysts by the Self-Activation of Amorphous Platinum

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