Direct methane activation by atomically thin platinum nanolayers on two-dimensional metal carbides

Li, Zhe; Xiao, Yang; Chowdhury, Prabudhya Roy; Wu, Zhenwei; Ma, Tao; Chen, Johnny Zhu; Wan, Gang; Kim, Tae Hoon; Jing, Dapeng; He, Peilei; Potdar, Pratik J.; Zhou, Lin; Zeng, Zhenhua; Ruan, Xiulin; Miller, Jeffrey T.; Greeley, Jeffrey; Wu, Yue; Varma, Arvind

doi:10.1038/s41929-021-00686-y

Cited by 86 publications

(72 citation statements)

References 52 publications

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“…[ 177 ] However, Pt atomically thin nanolayers (ATNLs) rather than Pt‐Mo alloys are formed on the Mo 2 TiC 2 T x surface, which is explained by the preferential formation of interfacial Mo‐Pt bonds and the lower interface formation energy of a Pt nanolayer than a nanoparticle. [ 189 ] The Pt ATNLs on Mo 2 TiC 2 T x show a stable conversion (7%) and a high selectivity (>98%) for C 2 products in the non‐oxidative methane coupling reaction.…”

Section: Metal Ions In Mxene Applicationsmentioning

confidence: 99%

Roles of Metal Ions in MXene Synthesis, Processing and Applications: A Perspective

Tao

Shang

et al. 2022

Advanced Science

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With a decade of effort, significant progress has been achieved in the synthesis, processing, and applications of MXenes. Metal ions play many crucial roles, such as in MXene delamination, structure regulation, surface modification, MXene composite construction, and even some unique applications. The different roles of metal ions are attributed to their many interactions with MXenes and the unique nature of MXenes, including their layered structure, surface chemistry, and the existence of multi‐valent transition metals. Interactions with metal ions are crucial for the energy storage of MXene electrodes, especially in metal ion batteries and supercapacitors with neutral electrolytes. This review aims to provide a good understanding of the interactions between metal ions and MXenes, including the classification and fundamental chemistry of their interactions, in order to achieve their more effective utilization and rational design. It also provides new perspectives on MXene evolution and exfoliation, which may suggest optimized synthesis strategies. In this respect, the different effects of metal ions on MXene synthesis and processing are clarified, and the corresponding mechanisms are elaborated. Research progress on the roles metal ions have in MXene applications is also introduced.

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Section: Metal Ions In Mxene Applicationsmentioning

confidence: 99%

Roles of Metal Ions in MXene Synthesis, Processing and Applications: A Perspective

Tao

Shang

et al. 2022

Advanced Science

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“…The metal compounds (e.g., oxides, sulfides, carbides) supported SNC are largely investigated in thermocatalysis and some present outstanding catalytic performances. [65][66][67][68][69] Due to the low conductivity and insufficient charge transfer in these supports, their roles in electrocatalysis are limited. Therefore, changing the properties of supports is the most feasible strategy to overcome their drawbacks toward electrocatalysis applications.…”

Section: Sub-nanometer Metal Clustermentioning

confidence: 99%

Supported Sub‐Nanometer Clusters for Electrocatalysis Applications

Zhang

Chen

Wang

et al. 2022

Adv Funct Materials

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Single-atom catalysts (SACs) have attracted great attention in the field of electrocatalysis due to their exceptional activity, selectivity, 100% atom utilization, and tailorability of active sites at atomic level. The metal-support interactions and interatomic synergies, however, are severely limited due to the isolation of active sites in SACs which hinder their applications in some complex reactions. To this end, supported sub-nanometer cluster catalysts (SNCCs, <2 nm) with nearly fully exposed active atoms may outperform the SACs in some specific catalytic reactions. The presence of abundant chemical bonds in the clusters can flexibly regulate the support-cluster interaction and build ensemble effect in the sub-nanometer clusters for different electrocatalysis applications. In this review, recent advances of supported SNCCs in electrocatalysis applications are summarized and discussed for the first time. In particular, the importance of the support-cluster interactions and ensemble effect of the clusters in determining the catalytic performance of SNCCs are highlighted. Lastly, challenges and opportunities in SNCCs electrocatalysis are prospected.

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“…Unlike catalysts loaded with NPs, NCs and SACs are usually dispersed atomically on carriers with coordinative unsaturation, 146 making these catalysts have the maximum atomic utilization. 138,[147][148][149] Unfortunately, the large-scale synthesis of catalysts loaded with NCs or SACs remains a challenge due to the natural tendency for metal atoms to diffuse and agglomerate. 150 In contrast, MXenes can provide numerous dispersed sites for uniform deposition of NCs and SACs through their termination groups and vacancy defects.…”

Section: Transition Metal Nanoclusters (Ncs) or Single Atoms (Sas)mentioning

confidence: 99%

“…While the strong and stable connection between metals and MXenes is usually ignored, it is the prerequisite for the stable use of this kind of catalyst, and therefore, more and more studies start to focus on metal–support interactions. Currently, there are three kinds of interactions for MXene-supported catalysts: (i) electrostatic interaction, 132 (ii) intermetallic interaction, 138 and (iii) coordination interaction. 122 Due to these three kinds of interactions, the synergistic effects in catalysis between a transition metal and MXenes can be obtained, and the stability of MXene-supported catalysts is greatly enhanced.…”

Section: Mxenes As Supportsmentioning

confidence: 99%