Preparation of PtNiCo alloy/nitrogen-doped porous carbon composites and their electrocatalytic properties

Zhou, Na; Zhang, Ruijin; Wang, Rui; Li, Yinshi

doi:10.1016/j.cej.2023.146010

Cited by 10 publications

(1 citation statement)

References 72 publications

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“…The optimum HER electrocatalyst generally contains an ΔG H∗ value near zero, which speeds up hydrogen release while simultaneously enabling a quick proton/electron transfer. 60 , 61 From Figures 5 D and S19 (see the supplemental information), the ΔG H∗ of Pd-Co heterojunction of N-ZIFC/CoPd-30 is −0.16 eV, and much smaller than that of the Pd site of N-ZIFC/Pd (−0.34 eV), Co site of N-ZIFC/Co (−0.41 eV), ZIFC (1.44 eV), and N-ZIFC (0.94 eV), and can be compared to the most advanced Pt catalyst (−0.09 eV). These results demonstrate that Pd-Co heterojunction of N-ZIFC/CoPd-30 is a promising electrocatalyst for HER.…”

Section: Resultsmentioning

confidence: 99%

Mechanism insight into the N-C polar bond and Pd-Co heterojunction for improved hydrogen evolution activity

Zhou,

Shi,

Zhang

et al. 2024

iScience

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Section: Resultsmentioning

confidence: 99%

Mechanism insight into the N-C polar bond and Pd-Co heterojunction for improved hydrogen evolution activity

Zhou,

Shi,

Zhang

et al. 2024

iScience

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Highly‐Branched PtCu Nanocrystals with Low‐Coordination for Enhanced Oxygen Reduction Catalysis

Zhang,

Liu,

Luo

et al. 2024

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Low‐coordination platinum‐based nanocrystals emanate great potential for catalyzing the oxygen reduction reactions (ORR) in fuel cells, but are not widely applied owing to poor structural stability. Here, several PtCu nanocrystals (PtCu NCs) with low coordination numbers were prepared via a facile one‐step method, while the desirable catalyst structures were easily obtained by adjusting the reaction parameters. Wherein, the Pt1Cu1 NCs catalyst with abundant twin boundaries and high‐index facets displays 15.25 times mass activity (1.647 A mgPt−1 at 0.9 VRHE) of Pt/C owing to the abundant effective active sites, low‐coordination numbers and appropriate compressive strain. More importantly, the core‐shell and highly developed dendritic structures in Pt1Cu1 NCs catalyst give it an extremely high stability with only 17.2% attenuation of mass activity while 61.1% for Pt/C after the durability tests (30 000 cycles). In H2‐O2 fuel cells, Pt1Cu1 NCs cathode also exhibits a higher peak power density and a longer‐term lifetime than Pt/C cathode. Moreover, theoretical calculations imply that the weaker adsorption of intermediate products and the lower formation energy barrier of OOH* in Pt1Cu1 NCs collaboratively boost the ORR process. This work offers a morphology tuning approach to prepare and stabilize the low‐coordination platinum‐based nanocrystals for efficient and stable ORR.

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Introducing yttrium into Pt-based intermetallic compounds induce electron perturbation and anti-oxidation for enhancing oxygen reduction activity and durability

Li,

Liu,

et al. 2024

Chemical Engineering Journal

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Preparation of PtNiCo alloy/nitrogen-doped porous carbon composites and their electrocatalytic properties

Cited by 10 publications

References 72 publications

Mechanism insight into the N-C polar bond and Pd-Co heterojunction for improved hydrogen evolution activity

Mechanism insight into the N-C polar bond and Pd-Co heterojunction for improved hydrogen evolution activity

Highly‐Branched PtCu Nanocrystals with Low‐Coordination for Enhanced Oxygen Reduction Catalysis

Introducing yttrium into Pt-based intermetallic compounds induce electron perturbation and anti-oxidation for enhancing oxygen reduction activity and durability

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