Ternary hybrid CuO-PMA-Ag sub-1 nm nanosheet heterostructures

Chen

et al. 2022

Small

extensive interest, [1][2][3] such as SCs, [4] rechargeable ion batteries, [5] water splitting, [6] metal-air batteries, [7] and CO 2 RR. [8] However, the practical applications of SCs and rechargeable ion batteries are limited by low energy density and low power density, respectively. [9,10] The multiple-electron transfer reactions in water splitting have posed a significant challenge that limits the catalytic efficiency and cycle stability. [11] At present, the urgent issue of metal-air battery is to design high-performance bifunctional electrodes. [12] For CO 2 RR, the technical realization is limited by the activity and selectivity of the catalyst, and the selectivity of its product beyond that of CO. [13,14] In these electrochemical devices, electrodes represent the core component, which dictates the efficiency, energy and power density, as well as catalytic activity and durability.Since the birth of graphene, 2D materials have attracted great attention due to their unique electrochemical, mechanical, and optical properties and diverse applications, as manifested in over 3000 academic papers each year. [15,16] 2D materials possess some structural advantages over the 0D and 1D counterparts by interlayer gap bonding and weak out-of-plane Van der Waals interaction, which provides an interesting platform for energy storage and conversion research. [17,18] So far, the 2D material family mainly includes transition metal dichalcogenides, transition metal carbides, layered metal oxides, layered double hydroxides and other graphene-like materials, such as black phosphorus. Of these, copper-based materials have received extensive attention because of high natural abundance, low price, high strength, arc erosion resistance, easy preparation of various nanoshapes, wear resistance, etc. (Figure 1), [19,20] leading to excellent electrochemical performance and advancement of electrochemical energy storage and conversion (Figure 2). For example, with a large surface area and potential size effect, CuO nanostructures, a p-type semiconductor, have excellent physical and chemical properties for SCs, as well as interesting magnetic and superhydrophobic properties, as compared with other metal oxides, such as TiO 2 , ZnO, WO 3 , and SnO 2 . [21] Cu-S compounds are a promising lithium cathode with a high energy density and long cycling stability. [22] Cu-Se is also considered as a novel cathode 2D materials have shown great potential as electrode materials that determine the performance of a range of electrochemical energy technologies. Among these, 2D copper-based materials, such as Cu-O, Cu-S, Cu-Se, Cu-N, and Cu-P, have attracted tremendous research interest, because of the combination of remarkable properties, such as low cost, excellent chemical stability, facile fabrication, and significant electrochemical properties. Herein, the recent advances in the emerging 2D copper-based materials are summarized. A brief summary of the crystal structures and synthetic methods is started, and innovative strategies for improving electro...

Section: Strategies For Enhancing Electrochemical Performancementioning

confidence: 99%

Emerging 2D Copper‐Based Materials for Energy Storage and Conversion: A Review and Perspective

Ren

Chen

et al. 2022

Small

“…All-inorganic POM-based co-assemblies constitute a comparatively small subset of a unique class of materials. [31][32][33][34][35][36] These all-inorganic solid-state nanostructured materials are accessed via the bottom-up fabri-cation route, in which the characteristic features of POMs can be rationally introduced into the extended solids, thereby presenting an exciting platform for understanding the design principles of POM-based tunable solid-state transition metal oxide assemblies. 37 Recently, we have developed a strategy to synthesize freestanding two-dimensional (2D) phosphomolybdic acid (PMA) cluster and iron cobalt mixed-oxide co-assembled quasinanosheets (QNSs).…”

Section: Introductionmentioning

confidence: 99%

PMA-FeCo mixed-oxide magnetic quasi-nanosheets

Akram

2022

Nanoscale

Self Cite

“…Apart from these achievements, the most important gift from the boom of nanochemistry is the belief that the size of materials plays a decisive role in their properties. The progress of nanochemistry has inspired many researchers to explore the size-dependent properties of nanomaterials with smaller size, resulting in a bulk of reports about ultrathin or ultrafine nanomaterials. − As the definition of ultrafine nanomaterials is ambiguous, we suggest the term, SNMs, to refer to the nanomaterials with size near the diameter of linear polymers and the size of a single unit cell in at least one dimension. , Thanks to the recent development of synthetic methods to control the growth of materials at subnanometric scale, such as cluster-nuclei coassembly, an increasing amount of SNMs is reported. − Consequently, more and more facts support that the subnanometric size endows SNMs with conspicuously different properties compared to their counterparts with larger sizes …”

mentioning

confidence: 99%

“…Thus, the electronic structures of SNMs can be readily tuned by regulating the ligands . Thanks to the tunable electronic structures and high ratio of surface atoms, SNMs are promising in catalysis ,,, and energy conversion. ,, …”

mentioning

confidence: 99%

“…Thus, the electronic structures of SNMs can be readily tuned by regulating the ligands. 25 Thanks to the tunable electronic structures and high ratio of surface atoms, SNMs are promising in catalysis 19,20,35,36 and energy conversion. 18,21,37 As a subfield of nanochemistry, chiral inorganic nanostructures have sparked intense interest among researchers for their potential applications in asymmetric catalysis, 38−40 enantiomer separation, 41 and optical devices.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Chiral Conformation of Subnanometric Materials

2021

ACS Nano

Self Cite

Subnanometric materials (SNMs) refer to nanomaterials with sizes comparable to the diameter of common linear polymers or confined at the level of a single unit cell in at least one dimension, usually <1 nm. Conventional inorganic nanoparticles are usually deemed to be rigid, lacking self-adjustable conformation. In contrast, the size at subnanometric scale endows SNMs with flexibility analogous to polymers, resulting in their abundant self-adjustable conformation. It is noteworthy that some highly flexible SNMs can adjust their shape automatically to form chiral conformation, which is rare in conventional inorganic nanoparticles. Herein, we summarize the chiral conformation of SNMs and clarify the driving force behind their formation, in an attempt to establish a better understanding for the origin of flexibility and chirality at subnanometric scale. In addition, the general strategies for controlling the conformation of SNMs are elaborated, which might shed light on the efficient fabrications of chiral inorganic materials. Finally, the challenges facing this area as well as some unexplored topics are discussed.