Journal ArticleDOI
One‐Pot Synthesis of Freestanding Porous Palladium Nanosheets as Highly Efficient Electrocatalysts for Formic Acid Oxidation
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TLDR
In this paper, a facile one-pot synthesis of ultrathin freestanding porous Pd nanosheets (≈2.5 µm in lateral size and 10 nm in thickness) was presented.Abstract:
Freestanding ultrathin 2D noble metal nanosheets have drawn enormous attention due to their potential applications in various fields. However, the synthesis of 2D noble metal nanosheets still remains a great challenge due to the lack of an intrinsic driving force for anisotropic growth of 2D structures. Here, a facile one-pot synthesis of ultrathin freestanding porous Pd nanosheets (≈2.5 µm in lateral size and 10 nm in thickness) flexibly knitted by interweaved ultrathin nanowires with the assistance of poly(diallyldimethylammonium chloride) is presented. Nanoparticles attachment and subsequent self-assembly in the synthetic process are responsible for the formation of such intriguing nanostructures. Moreover, finely controlling the pH value of the precursor solution leads to yield different Pd nanostructures with tunable dimensionalities, including 3D nanoflowers, 2D nanosheets, and 1D nanochains. Owing to the unique structural features, the obtained freestanding porous Pd nanosheets exhibit excellent electrocatalytic activity and stability towards formic acid oxidation compared to those of other dimensional counterparts and commercial Pd black.read more
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Universal Surfactant-Free Strategy for Self-Standing 3D Tremella-Like Pd–M (M = Ag, Pb, and Au) Nanosheets for Superior Alcohols Electrocatalysis
Journal ArticleDOI
Electronic Modulation of Non-van der Waals 2D Electrocatalysts for Efficient Energy Conversion.
Hui Wang,Hui Wang,Hui Wang,Jianmei Chen,Yanping Lin,Xiaohan Wang,Jianmin Li,Yao Li,Lijun Gao,Labao Zhang,Dongliang Chao,Xu Xiao,Jong-Min Lee +12 more
TL;DR: In this article, the progress of non-van der Waals (non-vdW) 2D materials with numerous chemical bonds in all three dimensions and novel chemical and electronic properties beyond those of vdW 2D material have been studied increasingly over the past decades.
Journal ArticleDOI
Multimetallic nanosheets: synthesis and applications in fuel cells
TL;DR: Two-dimensional nanomaterials, particularly multimetallic nanosheets with single or few atoms thickness, are attracting extensive research attention because they display remarkable advantages over their bulk counterparts, including high electron mobility, unsaturated surface coordination, a high aspect ratio, and distinctive physical, chemical, and electronic properties.
Journal ArticleDOI
Atomically ultrathin RhCo alloy nanosheet aggregates for efficient water electrolysis in broad pH range
Abstract: To date, noble metal nanostructures are the most efficient and stable electrocatalysts for water splitting. In this study, ultrathin RhCo alloy nanosheet aggregates (RhCo-ANAs) with atomic thickness (1.3 nm) were synthesized by a high-temperature cyanogel-reduction method. Moreover, the electrocatalytic performance of RhCo-ANAs for water splitting was investigated in acidic, neutral, and alkaline solutions. RhCo-ANAs exhibited higher activity and long-term stability for the anodic oxygen evolution reaction (OER) and cathodic hydrogen evolution reaction (HER) than RuO2 nanoparticle (RuO2-NP) and Pt nanoparticle (Pt-NP) electrocatalysts. In particular, RhCo-ANAs only require the overpotential of 31 and 310 mV at the current density of 10 mA cm−2 for the HER and OER in a neutral solution, respectively. Furthermore, we directly grew RhCo-ANAs on carbon foam (CF) (termed as RhCo-ANAs/CF) with flexible property, which could be directly used as a cathode and an anode electrocatalyst for full water splitting in a two-electrode system. The two-electrode electrolyzer, assembled by RhCo-ANAs/CF as a bifunctional electrocatalyst, can provide the stable 10 mA cm−2 current density at 1.54 V potential in a neutral solution. Importantly, the symmetric RhCo-ANAs/CF‖RhCo-ANAs/CF electrolyzer has outstanding reversible switch ability for the HER and OER, which can complete fifty alternating operation by periodically switching the cathode and anode.
Journal ArticleDOI
Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis
TL;DR: In this article, a review of the recent advances in 2D Pd-based nanomaterials for the anodic fuel oxidation reaction (FOR) and cathodic oxygen reduction reaction (ORR) is summarized.
References
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Journal ArticleDOI
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Journal ArticleDOI
Freestanding palladium nanosheets with plasmonic and catalytic properties
Xiaoqing Huang,Shaoheng Tang,Xiaoliang Mu,Yan Dai,Guangxu Chen,Zhi-You Zhou,Fangxiong Ruan,Zhilin Yang,Nanfeng Zheng +8 more
TL;DR: The facile synthesis of freestanding hexagonal palladium nanosheets that are less than 10 atomic layers thick are reported, using carbon monoxide as a surface confining agent and exhibit a well-defined but tunable surface plasmon resonance peak in the near-infrared region.
Journal ArticleDOI
Superwetting nanowire membranes for selective absorption
Jikang Yuan,Xiaogang Liu,Xiaogang Liu,Ozge Akbulut,Junqing Hu,Steven L. Suib,Jing Kong,Francesco Stellacci +7 more
TL;DR: This work presents a self-assembly method for constructing thermally stable, free-standing nanowire membranes that exhibit controlled wetting behaviour ranging from superhydrophilic tosuperhydrophobic, and suggests an innovative material that should find practical applications in the removal of organics, particularly in the field of oil spill cleanup.
Journal ArticleDOI
Polyelectrolyte-Functionalized Graphene as Metal-Free Electrocatalysts for Oxygen Reduction
TL;DR: G graphene positively charged via intermolecular charge-transfer with PDDA was demonstrated to show remarkable electrocatalytic activity toward ORR with better fuel selectivity, tolerance to CO posing, and long-term stability than that of the commercially available Pt/C electrode.