Ultrathin NiPt Single-Atom Alloy for Synergistically Accelerating Alkaline Hydrogen Evolution

Huo, Liuxiang; Jin, Chunqiao; Tang, Jianli; Xu, Xionghu; Jiang, Kai; Shang, Liyan; Li, Yawei; Zhang, J. Z.; Zhu, Liangqing; Chu, Junhao; Hu, Zhigao

doi:10.1021/acsaem.2c02793

Cited by 11 publications

(8 citation statements)

References 56 publications

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“…Hu and coauthors reported an HER catalyst using porous Ni(OH) 2 nanosheets with Pt loading and then annealing the previous catalyst to get a NiPt alloy catalyst. 84 The X-ray powder diffraction (XRD) spectra show the difference of Ni 2p and Pt 4s between Pt–Ni(OH) 2 and the NiPt alloy, which reveals a lower oxidation state of Pt single atom in NiPt. The new Ni–Pt bridge sites provide a low H binding energy, and Ni–Ni bright sites can adsorb H 2 O in the alkaline condition.…”

Section: Intrinsic Activity Of Single Sitementioning

confidence: 99%

“…The single-atom alloy catalyst can greatly increase the density of the metal active sites while considering their synergistic effects. Hu and coauthors reported an HER catalyst using porous Ni(OH) 2 nanosheets with Pt loading and then annealing the previous catalyst to get a NiPt alloy catalyst . The X-ray powder diffraction (XRD) spectra show the difference of Ni 2p and Pt 4s between Pt–Ni(OH) 2 and the NiPt alloy, which reveals a lower oxidation state of Pt single atom in NiPt.…”

Section: Intrinsic Activity Of Single Sitementioning

confidence: 99%

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Challenges and Perspectives of Single-Atom-Based Catalysts for Electrochemical Reactions

Chen

et al. 2023

JACS Au

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Single-atom catalysts (SACs) are emerging as the most promising catalysts for various electrochemical reactions. The isolated dispersion of metal atoms enables high density of active sites, and the simplified structure makes them ideal model systems to study the structure–performance relationships. However, the activity of SACs is still insufficient, and the stability of SACs is usually inferior but has received little attention, hindering their practical applications in real devices. Moreover, the catalytic mechanism on a single metal site is unclear, leading the development of SACs to rely on trial-and-error experiments. How can one break the current bottleneck of active sites density? How can one further increase the activity/stability of metal sites? In this Perspective, we discuss the underlying reasons for the current challenges and identify precisely controlled synthesis involving designed precursors and innovative heat-treatment techniques as the key for the development of high-performance SACs. In addition, advanced operando characterizations and theoretical simulations are essential for uncovering the true structure and electrocatalytic mechanism of an active site. Finally, future directions that may arise breakthroughs are discussed.

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Section: Intrinsic Activity Of Single Sitementioning

confidence: 99%

Section: Intrinsic Activity Of Single Sitementioning

confidence: 99%

Challenges and Perspectives of Single-Atom-Based Catalysts for Electrochemical Reactions

Chen

et al. 2023

JACS Au

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“…As shown in Figure 12, Hu's group fabricated Ni(OH) 2 nanoarrays following a hydrothermal method. 151 The obtained samples were then subjected to a second hydrothermal reaction using a Pt precursor to yield Pt−Ni(OH) 2 . The samples were then annealed and reduced in an atmosphere of Ar/H 2 to yield porous NiPt alloy nanosheets with ultralow Pt loading (Figure 12b).…”

Section: Phase Engineeringmentioning

confidence: 99%

“…As shown in Figure , Hu’s group fabricated Ni(OH) 2 nanoarrays following a hydrothermal method . The obtained samples were then subjected to a second hydrothermal reaction using a Pt precursor to yield Pt–Ni(OH) 2 .…”

Section: Design Strategies For Pt-based Alloysmentioning

confidence: 99%

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Optimizing Pt-Based Alloy Electrocatalysts for Improved Hydrogen Evolution Performance in Alkaline Electrolytes: A Comprehensive Review

Gao,

Zhu,

Chen

et al. 2023

ACS Nano

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The splitting of water through electrocatalysis offers a sustainable method for the production of hydrogen. In alkaline electrolytes, the lack of protons forces water dissociation to occur before the hydrogen evolution reaction (HER). While pure Pt is the gold standard electrocatalyst in acidic electrolytes, since the 5d orbital in Pt is nearly fully occupied, when it overlaps with the molecular orbital of water, it generates a Pauli repulsion. As a result, the formation of a Pt−H* bond in an alkaline environment is difficult, which slows the HER and negates the benefits of using a pure Pt catalyst. To overcome this limitation, Pt can be alloyed with transition metals, such as Fe, Co, and Ni. This approach has the potential not only to enhance the performance but also to increase the Pt dispersion and decrease its usage, thus overall improving the catalyst's costeffectiveness. The excellent water adsorption and dissociation ability of transition metals contributes to the generation of a proton-rich local environment near the Pt-based alloy that promotes HER. Significant progress has been achieved in comprehending the alkaline HER mechanism through the manipulation of the structure and composition of electrocatalysts based on the Pt alloy. The objective of this review is to analyze and condense the latest developments in the production of Pt-based alloy electrocatalysts for alkaline HER. It focuses on the modified performance of Pt-based alloys and clarifies the design principles and catalytic mechanism of the catalysts from both an experimental and theoretical perspective. This review also highlights some of the difficulties encountered during the HER and the opportunities for increasing the HER performance. Finally, guidance for the development of more efficient Pt-based alloy electrocatalysts is provided.

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Rational Design of Ultrafine Pt Nanoparticles with Strong Metal‐Support Interaction for Efficient Hydrogen Evolution

Chen,

Kang,

Geng

et al. 2024

Adv Funct Materials

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Hydrogen evolution reaction (HER) plays an indispensable role in hydrogen economy. However, the development of highly active and durable Pt catalysts remains a great challenge. A homogenously‐dispersed, ultrafine and chemically anchored Pt‐based catalyst is successfully synthesized with the regulation of ‐SH groups tethered to SBA‐15 template. The ‐SH not only regulates the particle size of Pt, but also modifies the chemical environment of the carbon support by converting itself into heteroatom—S. The obtained catalyst (Pt/OMCSH) exhibits superior HER catalytic activity (15.4 mV at 10 mA cm−2; 28.4 mV dec−1; 1.0 M KOH) and stability to benchmark samples and most of the previously reported Pt‐based electrocatalysts. First‐principles calculations reveal that the presence of S in the carbon support regulates the electronic structure of Pt and strengthens the metal‐support interaction, thus boosting the reaction kinetics and enhancing the stability of Pt/OMCSH catalyst for HER.

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Ultrathin NiPt Single-Atom Alloy for Synergistically Accelerating Alkaline Hydrogen Evolution

Cited by 11 publications

References 56 publications

Challenges and Perspectives of Single-Atom-Based Catalysts for Electrochemical Reactions

Challenges and Perspectives of Single-Atom-Based Catalysts for Electrochemical Reactions

Optimizing Pt-Based Alloy Electrocatalysts for Improved Hydrogen Evolution Performance in Alkaline Electrolytes: A Comprehensive Review

Rational Design of Ultrafine Pt Nanoparticles with Strong Metal‐Support Interaction for Efficient Hydrogen Evolution

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