Atomic‐Level Platinum Filling into Ni‐Vacancies of Dual‐Deficient NiO for Boosting Electrocatalytic Hydrogen Evolution (Adv. Energy Mater. 24/2022)

Yan, Yaotian; Lin, Jinghuang; Xu, Tianxiong; Liu, Baishen; Huang, Keke; Qiao, Liang; Liu, Shude; Cao, Jian; Jun, Seong Chan; Yamauchi, Yusuke; Qi, Junlei

doi:10.1002/aenm.202270099

Cited by 22 publications

(28 citation statements)

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“…However, Pt@VNC only requires a small overpotential of 5 mV to reach a current density of 10 mA cm −2 , which is much lower than those of Pt@NC (76 mV), commercial 20 wt.% Pt/C (14 mV), and the previously reported Pt‐based catalysts such as Pt 1 /OLC, Pt 1 /FeNC, A‐CoPt‐NC, Pt‐GT/Fe 3 Co 7 , Pt@NC‐B, Pt@PCM, Mo 2 TiC 2 T x ‐PtSA, D‐NiO‐Pt, etc (Table S4, Supporting Information). [ 30,38,45–50 ] Moreover, the overpotential of Pt@VNC is merely 33 mV at j = 100 mA cm −2 . The Faradaic efficiency of Pt@VNC calculated by operating 4 h HER at −3 mA is 98%, demonstrating that the imposed current mainly promotes hydrogen production without significant other side reactions, as shown in the supporting information.…”

Section: Resultsmentioning

confidence: 99%

Engineering Pt Coordination Environment with Atomically Dispersed Transition Metal Sites Toward Superior Hydrogen Evolution

Jin

Kim³

et al. 2023

Advanced Energy Materials

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Metal single‐atom (SA) catalysts have attracted immense attention due to the high catalytic efficiency given by the desired coordination environment of each metal atom. Yet, engineering the local electronic structure of SAs and multi‐atoms (MAs) still remains a challenge. Herein, an atomically dispersed catalyst comprised of Pt SAs, Pt‐Pt/V dual‐atoms, and small clusters supported on a vanadium and nitrogen co‐doped carbon (VNC) (denoted as Pt@VNC) surface is synthesized. In the Pt@VNC, both V and Pt atoms are evenly distributed on the surface of N‐doped carbon, while a few Pt atoms are linked to other Pt atoms via V, forming Pt clusters. The coordination structures of Pt atoms are modulated upon introducing atomically dispersed V sites (which generate small‐sized Pt clusters) and V2O5 clusters, showing extraordinary activity for the hydrogen evolution reaction (HER). Benefiting from the low charge transfer resistance, i.e., fast reaction kinetics, due to the synergistic effect of SAs and clusters, the Pt@VNC demonstrates superior catalytic efficiency and robust durability for the HER. It requires an overpotential of only 5 mV at a current density of 10 mA cm−2 and shows 15 times larger mass activity than the commercial 20 wt.% Pt/C catalyst. This novel catalyst‐design strategy paves a new way for maximizing catalytic efficiency by optimizing the coordination structure of metal atoms.

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Section: Resultsmentioning

confidence: 99%

Engineering Pt Coordination Environment with Atomically Dispersed Transition Metal Sites Toward Superior Hydrogen Evolution

Jin

Kim³

et al. 2023

Advanced Energy Materials

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“…The introduction of O V can improve the conductivity and alter the electronic structures, thus promoting the electrocatalytic activity. [ 19,25,54 ] As mentioned above, the electronic state of Pt is critical for HER activity. To understand the electronic state of Pt in R‐NF‐Pt, we prepared pure Pt NPs for comparison (Figure S14, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…In the past few years, various Pt‐based catalysts with distinctive structure and compositions have been designed, including Pt alloy catalysts, [ 14–17 ] heterostructures, [ 18–23 ] Pt single‐atom catalysts (SACs), [ 7,24–28 ] etc. [ 29 ] Pt‐based alloys show enhanced alkaline HER performance to some extent due to optimized hydrogen adsorption free energy (Δ G H* ).…”

Section: Introductionmentioning

confidence: 99%

Dense Platinum/Nickel Oxide Heterointerfaces with Abundant Oxygen Vacancies Enable Ampere‐Level Current Density Ultrastable Hydrogen Evolution in Alkaline

Wang¹,

Wang²,

Hui

et al. 2022

Adv Funct Materials

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Platinum (Pt) remains the benchmark electrocatalyst for alkaline hydrogen evolution reaction (HER), but its industry-scale hydrogen production is severely hampered by the lack of well-designed durable Pt-based materials that can operate at ampere-level current densities. Herein, based on the original oxide layer and parallel convex structure on the surface of nickel foam (NF), a 3D quasi-parallel architecture consisting of dense Pt nanoparticles (NPs) immobilized oxygen vacancy-rich NiO x heterojunctions (Pt/NiO x -O V ) as an alkaline HER catalyst is developed. A combined experimental and theoretical studies manifest that anchoring Pt NPs on NiO x -O V leads to electronrich Pt species with altered density of states (DOS) distribution, which can efficiently optimize the d-band center and the adsorption of reaction intermediates as well as enhance the water dissociation ability. The as-prepared catalyst exhibits extraordinary HER performance with a low overpotential of 19.4 mV at 10 mA cm −2 , a mass activity 16.3-fold higher than that of 20% Pt/C, and a long durability of more than 100 h at 1000 mA cm −2 . Furthermore, the assembled alkaline electrolyzer combined with NiFe-layered double hydroxide requires extremely low voltage of 1.776 V to attain 1000 mA cm −2 , and can operate stably for more than 400 h, which is rarely achieved.

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“…Hence, efficient water splitting needs of appropriate efficient electrocatalysts to diminish overpotentials for both HER and OER. To date, Pt‐based materials and their derivatives are generally regarded as the state‐of‐the‐art catalyst for HER, [ 14–19 ] owing to the outstanding hydrogen binding energy (the optimum adsorption and desorption capacity with hydrogen intermediates), near‐zero overpotentials, remarkable exchange current densities ( j 0 ), and small Tafel slopes. [ 20–21 ] However, there are still four main challenges ( Figure ) which limit the commercialization of Pt‐based materials.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Ultralow‐Pt‐Loading Electrocatalysts for the Efficient Hydrogen Evolution

et al. 2023

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Hydrogen production from water electrolysis provides a green and sustainable route. Platinum (Pt)-based materials have been regarded as efficient electrocatalysts for the hydrogen evolution reaction (HER). However, the large-scale commercialization of Pt-based catalysts suffers from the high cost. Therefore, ultralow-Pt-loading electrocatalysts, which can reach the balance of low cost and high HER performance, have attracted much attention. In this review, representative promising synthetic strategies, including wet chemistry, annealing, electrochemistry, photochemistry, and atomic layer deposition are summarized. Further, the interaction between different electrocatalyst components (transition metals and their derivatives) and Pt is discussed. Notably, this interaction can effectively accelerate the kinetics of the HER, enhancing the catalytic activity. At last, current challenges and future perspectives are briefly discussed.

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Atomic‐Level Platinum Filling into Ni‐Vacancies of Dual‐Deficient NiO for Boosting Electrocatalytic Hydrogen Evolution (Adv. Energy Mater. 24/2022)

Cited by 22 publications

References 0 publications

Engineering Pt Coordination Environment with Atomically Dispersed Transition Metal Sites Toward Superior Hydrogen Evolution

Engineering Pt Coordination Environment with Atomically Dispersed Transition Metal Sites Toward Superior Hydrogen Evolution

Dense Platinum/Nickel Oxide Heterointerfaces with Abundant Oxygen Vacancies Enable Ampere‐Level Current Density Ultrastable Hydrogen Evolution in Alkaline

Recent Advances in Ultralow‐Pt‐Loading Electrocatalysts for the Efficient Hydrogen Evolution

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